CN112893447A - Heavy metal contaminated soil remediation agent and remediation method - Google Patents
Heavy metal contaminated soil remediation agent and remediation method Download PDFInfo
- Publication number
- CN112893447A CN112893447A CN202110273945.0A CN202110273945A CN112893447A CN 112893447 A CN112893447 A CN 112893447A CN 202110273945 A CN202110273945 A CN 202110273945A CN 112893447 A CN112893447 A CN 112893447A
- Authority
- CN
- China
- Prior art keywords
- heavy metal
- contaminated soil
- metal contaminated
- soil remediation
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 87
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 64
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 63
- 238000005067 remediation Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 31
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 50
- 239000011707 mineral Substances 0.000 claims abstract description 50
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 21
- 239000003381 stabilizer Substances 0.000 claims abstract description 19
- 239000011368 organic material Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000004048 modification Effects 0.000 claims abstract description 10
- 238000012986 modification Methods 0.000 claims abstract description 10
- 239000011734 sodium Substances 0.000 claims abstract description 10
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 11
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 9
- 238000001354 calcination Methods 0.000 claims description 9
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims description 9
- 235000019796 monopotassium phosphate Nutrition 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 8
- 229960000892 attapulgite Drugs 0.000 claims description 7
- 239000000292 calcium oxide Substances 0.000 claims description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 7
- 239000003814 drug Substances 0.000 claims description 7
- 229910052625 palygorskite Inorganic materials 0.000 claims description 7
- 229910052683 pyrite Inorganic materials 0.000 claims description 7
- 239000011028 pyrite Substances 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 6
- 238000007792 addition Methods 0.000 claims description 6
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 claims description 6
- 239000001506 calcium phosphate Substances 0.000 claims description 6
- 235000019691 monocalcium phosphate Nutrition 0.000 claims description 6
- 229910001467 sodium calcium phosphate Inorganic materials 0.000 claims description 6
- 239000010902 straw Substances 0.000 claims description 6
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004021 humic acid Substances 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 235000017060 Arachis glabrata Nutrition 0.000 claims description 3
- 244000105624 Arachis hypogaea Species 0.000 claims description 3
- 235000010777 Arachis hypogaea Nutrition 0.000 claims description 3
- 235000018262 Arachis monticola Nutrition 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 3
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 241000209140 Triticum Species 0.000 claims description 3
- 235000021307 Triticum Nutrition 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 229910052626 biotite Inorganic materials 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 229940062672 calcium dihydrogen phosphate Drugs 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 3
- 229960001714 calcium phosphate Drugs 0.000 claims description 3
- 235000011010 calcium phosphates Nutrition 0.000 claims description 3
- 235000006408 oxalic acid Nutrition 0.000 claims description 3
- 235000020232 peanut Nutrition 0.000 claims description 3
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 claims description 3
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 229910021646 siderite Inorganic materials 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 239000001488 sodium phosphate Substances 0.000 claims description 3
- 229960003339 sodium phosphate Drugs 0.000 claims description 3
- 235000011008 sodium phosphates Nutrition 0.000 claims description 3
- 159000000000 sodium salts Chemical group 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 3
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 230000006641 stabilisation Effects 0.000 abstract description 7
- 238000011105 stabilization Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 229910052793 cadmium Inorganic materials 0.000 abstract description 6
- 229910052785 arsenic Inorganic materials 0.000 abstract description 5
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052725 zinc Inorganic materials 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 229910052745 lead Inorganic materials 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 238000002386 leaching Methods 0.000 description 18
- 239000000843 powder Substances 0.000 description 11
- 238000002360 preparation method Methods 0.000 description 10
- 239000010949 copper Substances 0.000 description 9
- 239000004113 Sepiolite Substances 0.000 description 8
- 235000019355 sepiolite Nutrition 0.000 description 8
- 229910052624 sepiolite Inorganic materials 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 description 6
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 6
- 239000002910 solid waste Substances 0.000 description 6
- 230000000087 stabilizing effect Effects 0.000 description 6
- 239000011133 lead Substances 0.000 description 5
- 230000008439 repair process Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 229910052622 kaolinite Inorganic materials 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 238000010668 complexation reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910000150 monocalcium phosphate Inorganic materials 0.000 description 3
- ZODDGFAZWTZOSI-UHFFFAOYSA-N nitric acid;sulfuric acid Chemical compound O[N+]([O-])=O.OS(O)(=O)=O ZODDGFAZWTZOSI-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010908 plant waste Substances 0.000 description 3
- 230000001376 precipitating effect Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000003900 soil pollution Methods 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- 229910018512 Al—OH Inorganic materials 0.000 description 2
- 229910008051 Si-OH Inorganic materials 0.000 description 2
- 229910006358 Si—OH Inorganic materials 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000010757 Reduction Activity Effects 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- -1 aluminum ions Chemical class 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- AQLMHYSWFMLWBS-UHFFFAOYSA-N arsenite(1-) Chemical compound O[As](O)[O-] AQLMHYSWFMLWBS-UHFFFAOYSA-N 0.000 description 1
- 238000003321 atomic absorption spectrophotometry Methods 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010504 bond cleavage reaction Methods 0.000 description 1
- 230000002308 calcification Effects 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 230000008263 repair mechanism Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a heavy metal contaminated soil remediation agent and a remediation method, and belongs to the field of soil remediation. The heavy metal contaminated soil remediation agent is characterized in that: the raw materials comprise 30-80 parts of natural minerals, 10-20 parts of stabilizing agents, 0-20 parts of organic materials, 0-10 parts of calcined materials, 0-10 parts of pH value adjusting agents and 0-10 parts of sodium auxiliary agents, wherein the natural minerals, the stabilizing agents, the organic materials, the calcined materials, the pH value adjusting agents and the sodium auxiliary agents are all in parts by mass; the heavy metal contaminated soil remediation agent is compounded in the following manner: grinding the raw materials, adding the raw materials in proportion and physically mixing the raw materials; or the auxiliary agent is further subjected to water-soluble modification of the calcined modified mineral, and then is uniformly and physically mixed with the organic material, the pH value regulator and the auxiliary agent and ground. The heavy metal contaminated soil remediation agent and the remediation method use heavy metal contaminated soil such As Cu, Cd, Ni, Pb, As, Zn, hexavalent chromium and the like, and have the advantages of good stabilization effect, simple and easy maintenance process, low remediation cost and the like.
Description
Technical Field
The invention relates to a heavy metal contaminated soil remediation agent and a remediation method, and belongs to the field of soil remediation.
Background
The national survey bulletin (2014) of soil pollution conditions shows that the soil environment conditions in China are not optimistic overall, the soil pollution in some regions is serious, the soil environment quality of cultivated land is great, and the soil environment problem of waste land in the industrial and mining industry is prominent. The artificial activities of the industrial and mining industry, the agriculture and the like and the high background value of the soil environment are main causes of soil pollution or exceeding standards.
The current heavy metal contaminated soil remediation technology mainly starts from two angles of reduction of effectiveness of heavy metals in contaminated site soil or reduction of total amount of the heavy metals. The stabilizing repair technology belongs to the former technology, which is a process of chemically modifying harmful ingredients of waste and introducing the harmful ingredients into a certain stable lattice structure, and has the advantages of strong applicability and short repair time.
The total amount of heavy metals in soil in China is related to each grade of slight, mild, moderate and severe standard exceeding, the soil with moderate and severe standard exceeding puts higher requirements on a stabilized repairing medicament, the stabilized medicament compounded by chemicals on the market at present forms a situation of mixed fish eyes due to high preparation cost, single mechanism and poor stability, and the whole effect cannot meet the repairing requirement.
Therefore, from the stabilization and repair idea, the heavy metal stabilization agent which is economical, safe and efficient is researched and developed, and the heavy metal stabilization agent has a good market application prospect.
The prior art has the problems that: the market stabilizing agent is a purified or refined high-purity chemical, and the preparation cost is relatively high; the stabilizing mechanism of the medicament is single, and generally only has the function of precipitating heavy metals; after entering the environment, chemical drugs are affected by water, gas and soil and are easy to deteriorate and lose efficacy, and the stability of the chemical drugs is poor.
In view of this, a versatile heavy metal stabilizer and a method for preparing the same are disclosed in patent document CN 112048312A; in view of this, a high-efficiency heavy metal stabilizer, a preparation method and applications thereof are disclosed in patent document with publication (publication) number CN 111171836A; in view of the above, patent document with publication (publication) number CN111303888A discloses a heavy metal compound contaminated soil stabilizing and repairing agent with low environmental risk, and a preparation method and application thereof; in view of the above, patent document with publication (publication) No. CN111944538A discloses a stabilizer for remedying cadmium, lead and arsenic combined pollution of soil and a preparation method thereof; in view of this, a heavy metal stabilizer and a method of using the same are disclosed in patent document No. CN 111996010A; in view of this, patent document No. CN104004524A discloses an environment-friendly heavy metal stabilizer and its use method; compared with the comparative documents, the method mainly treats the minerals through calcination, and is obviously different from the comparative documents in the definition of mineral selection and calcination conditions.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a heavy metal contaminated soil repairing agent and a repairing method which are prepared by modifying and compounding natural clay minerals serving as main raw materials, overcome the problems and have the characteristics of low cost, multiple action mechanisms and long-term stabilization.
The heavy metal contaminated soil remediation agent and the remediation method use heavy metal contaminated soil such As Cu, Cd, Ni, Pb, As, Zn, hexavalent chromium and the like, and have the advantages of good stabilization effect, simple and easy maintenance process, low remediation cost and the like.
The technical scheme adopted by the invention for solving the problems is as follows: the heavy metal contaminated soil remediation agent is characterized in that: the raw materials comprise 30-80 parts of natural minerals, 10-20 parts of stabilizing agents, 0-20 parts of organic materials, 0-10 parts of calcined materials, 0-10 parts of pH value adjusting agents and 0-10 parts of sodium auxiliary agents, wherein the natural minerals, the stabilizing agents, the organic materials, the calcined materials, the pH value adjusting agents and the sodium auxiliary agents are all in parts by mass; the heavy metal contaminated soil remediation agent is compounded in the following manner:
grinding the raw materials, adding the raw materials in proportion and physically mixing the raw materials; or the auxiliary agent is further subjected to water-soluble modification of the calcined modified mineral, and then is uniformly and physically mixed with the organic material, the pH value regulator and the auxiliary agent and ground.
Further, the raw material of the modified mineral is a natural mineral having a layered structure or a chain layered structure, a large specific surface area, or a crystal structure, and is required to have a particle size of less than 0.75um (capable of passing through a 200-mesh sieve).
Further, the raw materials of the modified minerals are raw materials of modified minerals mainly containing aluminum, magnesium, silicon, iron, sulfur and the like.
Further, the natural mineral is selected from at least one of diatomite, attapulgite, biotite, kaolin, siderite or pyrite.
Further, the natural minerals need to be calcined at high temperature, and the calcining conditions are as follows: the temperature range of 300 ℃ to 900 ℃ with or without the addition of a calcined material and with or without a reducing atmosphere.
Further, the calcined material is at least one of crop waste, rice straw, wheat straw and peanut shell.
Further, the calcined material needs to be subjected to pulverization treatment.
Further, the stabilizer is phosphate, wherein the stabilizer comprises one of potassium dihydrogen phosphate, calcium dihydrogen phosphate, sodium phosphate and calcium phosphate.
Further, the organic material is selected from at least one of humic acid, biochar or activated carbon and can be used as a carrier of other raw materials.
Further, the pH value regulator is an acidic or alkaline regulator; the alkaline regulator is one of calcium oxide, calcium hydroxide and calcium carbonate, and the acidic regulator is one of citric acid, oxalic acid, phosphoric acid and hydrochloric acid.
Further, the auxiliary agent is a sodium salt, wherein the auxiliary agent comprises one of sodium carbonate or sodium chloride.
Further, another technical purpose of the invention is to provide a repairing method of the heavy metal contaminated soil repairing agent.
The technical purpose of the invention is realized by the following technical scheme.
The repairing method adopting the heavy metal contaminated soil repairing agent is characterized by comprising the following steps: the heavy metal contaminated soil remediation agent is applied to soil in a proportion of 0.5% -55%, the heavy metal contaminated soil remediation agent and the soil are mixed uniformly in a stirring or rolling mode, then water is sprayed to enable the water content of the system to reach 15% -45%, and the whole soil remediation system needs to be maintained for 3-10 days under the condition that the water content is kept.
Compared with the prior art, the invention has the following advantages:
1. the repair mechanism is wide:
(1) the special structure, the large specific surface area and the small particle size of the minerals in the raw materials enable the minerals to be combined with the surface of the repairing agent in a physical process similar to agglomeration, and the minerals have good physical adsorption performance on heavy metals through van der Waals force interaction between the minerals and the repairing agent; elements such as silicon, magnesium, aluminum, iron, sulfur and the like and other abundant mineral components enable heavy metals to generate complexation, precipitation or be reduced when the heavy metals are contacted with the surface of the repairing medicament, so that chemical precipitation is formed or the valence is reduced.
(2) The addition of the calcined material and the organic material further increases the group composition, the specific surface area and other stabilization performances of the repairing agent, and promotes the proceeding of the adsorption, complexation and reduction effects.
(3) The alkaline pH regulator provides OH-for the soil agent after being dissolved in water, and has better precipitation effect on positive ions of Cd, Cu, Pb, Zn, Ni and Cr in a proper alkaline environment.
(4) The auxiliary agent can provide Na + to form sodium-based minerals, and after the auxiliary agent is applied to soil, equivalent exchange is generated between heavy metal ions and ions on the surface of the remediation agent, so that new chemical bonds are not generated, namely, the heavy metal and the sodium-based minerals are fixed among the minerals through ion exchange.
2. High temperature modification is economically feasible:
(1) the high-temperature calcination modified natural mineral has the advantages of simple temperature modification operation, suitability for large-scale treatment, controllable cost and great advantage for engineering application.
(2) The high-temperature calcination modification can promote the calcification of minerals, generate active groups, increase the specific surface area and further improve the mineral repair performance.
3. The repair effect is fast and durable:
(1) the addition of the stabilizer directly provides an ionic component for precipitating heavy metals for a repairing agent system, so that the repairing agent can quickly generate a stabilizing effect after being applied to soil.
(2) The mineral and organic materials belong to insoluble and indissolvable substances in a short time, can continuously act in the soil environment under the condition of meeting the requirements of adsorbing and reducing heavy metals, and has a lasting effect.
4. Environment friendly and improved soil
(1) The raw materials of the repairing agent are mostly derived from natural minerals, organic materials and crop wastes, have small disturbance to soil, and belong to environment-friendly materials.
(2) The organic materials and the calcined materials can increase the organic matter content of the soil, increase the soil fertility and improve the soil texture.
(3) The pH regulator can build a better pH value environment for the repairing agent, enhance the repairing capability, neutralize acidified or alkalized soil after being applied into the soil as required, and improve the soil planting capability.
5. The preparation conditions are simple: the repairing agent has wide raw material source and is easy to prepare.
6. The water environment created by the method for guiding the application of the remediation agent is beneficial to the full precipitation, complexation, adsorption and reduction of the heavy metals in the polluted soil and the remediation agent.
Drawings
FIG. 1 is a schematic flow chart of a compounding manner of the heavy metal contaminated soil remediation agent according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples
Referring to fig. 1, it should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for understanding and reading the disclosure, and are not used for limiting the conditions that the present invention can be implemented, so they have no technical essence, and any structural modifications, ratio changes or size adjustments should fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle" and "one" are used for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.
The heavy metal contaminated soil remediation agent in the embodiment comprises, by mass, 30-80 parts of natural minerals, 10-20 parts of a stabilizer, 0-20 parts of an organic material, 0-10 parts of a calcined material, 0-10 parts of a pH value regulator and 0-10 parts of a sodium auxiliary agent.
The heavy metal contaminated soil remediation agent in the embodiment is compounded in the following manner: grinding the raw materials, adding the raw materials in proportion and physically mixing the raw materials; or the auxiliary agent is further subjected to water-soluble modification of the calcined modified mineral, and then is uniformly and physically mixed with the organic material, the pH value regulator and the auxiliary agent and ground.
Preferably, the modified mineral is a natural mineral having a layered structure or a chain layered structure, a large specific surface area, or a crystal structure, and is required to have a particle size of less than 0.75um (to pass through a 200-mesh sieve).
Preferably, the raw material of the modified mineral is a raw material of a modified mineral mainly containing aluminum, magnesium, silicon, iron, sulfur, and the like.
Preferably, the natural mineral is selected from at least one of diatomite, attapulgite, biotite, kaolin, siderite or pyrite.
Preferably, the natural mineral is calcined at a high temperature under the following conditions: the temperature range of 300 ℃ to 900 ℃ with or without the addition of a calcined material and with or without a reducing atmosphere.
Preferably, the calcined material is at least one of crop waste, rice straw, wheat straw and peanut shell.
Preferably, the stabilizer is a phosphate, wherein the phosphate comprises one of potassium dihydrogen phosphate, calcium dihydrogen phosphate, sodium phosphate and calcium phosphate.
Preferably, the organic material is at least one selected from humic acid, biochar or activated carbon, and can be used as a carrier of other raw materials.
Preferably, the pH value regulator is an acidic or alkaline regulator; the alkaline regulator is one of calcium oxide, calcium hydroxide and calcium carbonate, and the acidic regulator is one of citric acid, oxalic acid, phosphoric acid and hydrochloric acid.
Preferably, the auxiliary agent is a sodium salt, wherein the auxiliary agent comprises one of sodium carbonate or sodium chloride.
In this embodiment, the method for repairing heavy metal contaminated soil by using the repairing agent comprises the following steps: the heavy metal contaminated soil remediation agent is applied to soil in a proportion of 0.5% -55%, the heavy metal contaminated soil remediation agent and the soil are mixed uniformly in a stirring or rolling mode, then water is sprayed to enable the water content of the system to reach 15% -45%, and the whole soil remediation system needs to be maintained for 3-10 days under the condition that the water content is kept.
Specific example 1.
1. Preparation of restorative
(1) Calcining natural sepiolite ore in muffle furnace at 700 deg.C for 4 hr, cooling, grinding, and pulverizing.
(2) According to the mass fraction, 60 parts of the modified sepiolite, 20 parts of monocalcium phosphate, 10 parts of biochar, 5 parts of calcium oxide and 5 parts of sodium carbonate are physically and uniformly mixed, ground and sieved by a 200-mesh sieve to prepare the target repairing agent.
2. Use of restoratives
2.5g of the repairing agent is added into 500g of cadmium-contaminated soil of a certain farmland (the adding proportion is 0.5 percent), the water content is kept at 30 percent, and the farmland is maintained.
3. Comparative example
Respectively adding 2.5g of natural sepiolite and monocalcium phosphate into 500g of cadmium-polluted soil of the farmland, keeping the water content of 30%, and maintaining.
4. Results of the implementation
The method is characterized in that leaching pretreatment is carried out by a sulfuric acid-nitric acid method (HJT 299-2007) of a solid waste leaching toxicity leaching method, and an inductively coupled plasma mass spectrometry (HJ 766-2015) for measuring metal elements in the solid waste is adopted for heavy metal measurement. The experimental results are shown in table 1 below.
TABLE 1 Leaching and solidification Rate units of cadmium in soil samples Leaching (mg/L), solidification Rate (%)
The data in Table 1 show that the embodiment of the repairing agent can quickly react with heavy metal cadmium within 3 days after being applied to the polluted soil, and the curing rate can be kept at a higher level to be more than 90% along with the prolonging of the curing time; the natural sepiolite has slow action and relatively poor curing effect; monocalcium phosphate has a better effect immediately after application and gradually loses efficacy with time.
Sepiolite for Cd in this example2+The adsorption capacity of the sepiolite is obviously improved, mainly the limestone of the sepiolite is caused by high temperature, the content of CaO is increased, and finally the capability of the sepiolite for precipitating Cd2+ is improved.
Specific example 2.
1. Preparation of restorative
(1) Calcining natural attapulgite powder in a muffle furnace at 600 ℃ for 3 hours, cooling, grinding the mineral, and keeping the mineral powder.
(2) According to the mass fraction, 70 parts of the modified attapulgite powder, 10 parts of monopotassium phosphate and 10 parts of humic acid are taken, physically and uniformly mixed, ground and sieved by a 200-mesh sieve to prepare the target repairing agent.
2. Use of restoratives
15g of the repairing agent is added into 500g of copper-polluted soil of a certain polluted site (the adding proportion is 3 percent), the water content is kept at 30 percent, and the maintenance is carried out.
3. Comparative example
Respectively adding 15g of natural attapulgite powder and monopotassium phosphate into 500g of copper polluted soil of the polluted site, keeping 30% of water content, and maintaining.
4. Results of the implementation
The method is characterized in that leaching pretreatment is carried out by a sulfuric acid-nitric acid method (HJT 299-2007) of a solid waste leaching toxicity leaching method, and an inductively coupled plasma mass spectrometry (HJ 766-2015) for measuring metal elements in the solid waste is adopted for heavy metal measurement. The results of the experiment are shown in table 2 below.
TABLE 2 leaching and solidification Rate units of copper in soil samples leaching (mg/L), solidification Rate (%)
The data in table 2 show that, under the condition that the copper leaching of the polluted soil per se is over standard, the embodiment of the repairing agent can keep the stabilizing effect for a longer time, and the stabilizing effect reaches more than 85%. Calcination is likely to promote the conversion of magnesium aluminum silicate to other components that can alter the appearance of heavy metals, such as CaO/MgO (heavy metals precipitated after hydrolysis), reactive silanol groups (Si-OH, which form ligands with heavy metals), Al-OH chemical bond scission (which favors the formation of complexes of Al with arsenite).
Specific example 3.
1. Preparation of restorative
(1) Calcining natural kaolin powder in a muffle furnace at 650 ℃ for 6 hours, cooling, grinding the mineral, and keeping the mineral powder.
(2) According to the mass fraction, 70 parts of the modified attapulgite powder, 10 parts of monopotassium phosphate, 10 parts of biochar and 10 parts of calcium oxide are physically and uniformly mixed, ground and sieved by a 200-mesh sieve to prepare the target repairing agent.
2. Use of restoratives
Adding 25g of the repairing agent into 500g of soil polluted by copper, arsenic, zinc and lead in a certain polluted site (the adding proportion is 5%), keeping the water content at 40%, and maintaining for 10 days.
3. Comparative example
Respectively adding 25g of natural black mica powder and 25g of monopotassium phosphate into 500g of the soil polluted by copper, arsenic, zinc and lead in the polluted site, keeping the water content of 40 percent, and maintaining for 10 days.
4. Results of the implementation
The method is characterized in that leaching pretreatment is carried out by a sulfuric acid-nitric acid method (HJT 299-2007) of a solid waste leaching toxicity leaching method, and an inductively coupled plasma mass spectrometry (HJ 766-2015) for measuring metal elements in the solid waste is adopted for heavy metal measurement. The results of the experiment are shown in table 3 below.
TABLE 3 leaching and solidification Rate units of copper in soil samples leaching (mg/L), solidification Rate (%)
Kaolinite (al2o3.2si02.2h20) is the main component of kaolin. The kaolinite has larger specific surface area and negative charge, so that the kaolinite can adsorb heavy metal ions. By thermal modification at 650 ℃, the crystal structure of the kaolinite is thermally converted to amorphous metakaolin, which upon hydrochloric acid activation preferentially releases octahedral aluminum ions from the clay lattice, the additionally formed-Al-OH and-Si-OH bonds will also act as cation exchange centers.
Specific example 4.
1. Preparation of restorative
(1) The method comprises the steps of placing natural pyrite (specifically pyrite) powder into a ball mill for ball milling and crushing, then calcining for 6 hours in a muffle furnace at 650 ℃, cooling, grinding the mineral, and keeping the mineral in a powdery state.
(2) According to the mass fraction, 70 parts of the modified pyrite powder, 15 parts of monopotassium phosphate and 10 parts of humic acid are taken, physically and uniformly mixed, ground and sieved by a 200-mesh sieve to prepare the target repairing agent.
2. Use of restoratives
Adding 50g of the repairing agent into 500g of hexavalent chromium-contaminated soil in a contaminated site (the adding proportion is 10%), keeping the water content at 25%, and maintaining for 15 days.
3. Comparative example
Respectively adding 50g of natural kaolin powder and 50g of monopotassium phosphate into 500g of hexavalent chromium polluted soil of the polluted site, keeping 25% of water content, and maintaining for 15 days.
4. Results of the implementation
The total amount of hexavalent chromium in the soil is determined by a method of alkali solution extraction-flame atomic absorption spectrophotometry (HJ 1082-2019) for determining hexavalent chromium in the soil and sediments. The results of the experiment are shown in table 3 below.
TABLE 4 leaching and solidification Rate units of copper in soil samples leaching (mg/kg), removal (%)
Grinding of pyrite increases its specific surface area, and high temperature heating increases its reduced matter production. The reduction activity of pyrite is enhanced.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The heavy metal contaminated soil remediation agent is characterized in that: the raw materials comprise 30-80 parts of natural minerals, 10-20 parts of stabilizing agents, 0-20 parts of organic materials, 0-10 parts of calcined materials, 0-10 parts of pH value regulators and 0-10 parts of sodium auxiliary agents, wherein the natural minerals, the stabilizing agents, the organic materials, the calcined materials, the pH value regulators and the sodium auxiliary agents are all in parts by mass; the heavy metal contaminated soil remediation agent is compounded in the following manner: grinding the raw materials, adding the raw materials in proportion and physically mixing the raw materials; or the auxiliary agent is further subjected to water-soluble modification of the calcined modified mineral, and then is uniformly and physically mixed with the organic material, the pH value regulator and the auxiliary agent and ground.
2. The heavy metal contaminated soil remediation agent of claim 1, wherein: the modified mineral is a natural mineral having a layered structure or a chain layered structure, a large specific surface area, or a crystal structure.
3. The heavy metal contaminated soil remediation agent of claim 1, wherein: the raw materials of the modified minerals are natural minerals mainly containing aluminum, magnesium, silicon, iron and sulfur.
4. The heavy metal contaminated soil remediation agent of claim 1, wherein: the natural mineral is selected from at least one of diatomite, attapulgite, biotite, kaolin, siderite or pyrite;
the natural minerals are calcined at high temperature, and the calcining conditions are as follows: the temperature range of 300 ℃ to 900 ℃ with or without the addition of a calcined material and with or without a reducing atmosphere.
5. The heavy metal contaminated soil remediation agent of claim 1, wherein: the calcined material is at least one of rice straw, wheat straw or peanut shell.
6. The heavy metal contaminated soil remediation agent of claim 1, wherein: the stabilizer is phosphate, wherein the stabilizer comprises one of potassium dihydrogen phosphate, calcium dihydrogen phosphate, sodium phosphate and calcium phosphate.
7. The heavy metal contaminated soil remediation agent of claim 1, wherein: the organic material is at least one of humic acid, biochar or activated carbon.
8. The heavy metal contaminated soil remediation agent of claim 1, wherein: the pH value regulator is an acidic or alkaline regulator; the alkaline regulator is one of calcium oxide, calcium hydroxide and calcium carbonate, and the acidic regulator is one of citric acid, oxalic acid, phosphoric acid and hydrochloric acid.
9. The heavy metal contaminated soil remediation agent of claim 1, wherein: the auxiliary medicament is a sodium salt, wherein one of sodium carbonate or sodium chloride is contained.
10. A remediation method using the heavy metal contaminated soil remediation agent of any one of claims 1-9, wherein: the heavy metal contaminated soil remediation agent is applied to soil in a proportion of 0.5% -55%, the heavy metal contaminated soil remediation agent and the soil are mixed uniformly in a stirring or rolling mode, then water is sprayed to enable the water content of the system to reach 15% -45%, and the whole soil remediation system needs to be maintained for 3-10 days under the condition that the water content is kept.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110273945.0A CN112893447A (en) | 2021-03-15 | 2021-03-15 | Heavy metal contaminated soil remediation agent and remediation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110273945.0A CN112893447A (en) | 2021-03-15 | 2021-03-15 | Heavy metal contaminated soil remediation agent and remediation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112893447A true CN112893447A (en) | 2021-06-04 |
Family
ID=76105032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110273945.0A Pending CN112893447A (en) | 2021-03-15 | 2021-03-15 | Heavy metal contaminated soil remediation agent and remediation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112893447A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116376555A (en) * | 2023-04-04 | 2023-07-04 | 黄河水利委员会黄河水利科学研究院 | White mica-based calcium-magnesium loaded heavy metal passivator and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107987835A (en) * | 2017-12-12 | 2018-05-04 | 云南农业大学 | A kind of heavy-metal contaminated soil composite passivant and its preparation method and application |
| CN108889773A (en) * | 2018-05-29 | 2018-11-27 | 深圳文科园林股份有限公司 | A kind of cadmium pollution mine soil renovation agent and preparation and application method |
| CN109092878A (en) * | 2018-07-04 | 2018-12-28 | 北京高能时代环境技术股份有限公司 | It is a kind of for handling the stabilization agent and method of heavy-metal composite pollution soil |
| CN109575926A (en) * | 2018-11-26 | 2019-04-05 | 华中农业大学 | Cadmium arsenic combined contamination soil renovation agent |
| CN110423622A (en) * | 2019-08-08 | 2019-11-08 | 北京润鸣环境科技有限公司 | A kind of low sulfur type chromium-polluted soil renovation agent and preparation method thereof and application method |
-
2021
- 2021-03-15 CN CN202110273945.0A patent/CN112893447A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107987835A (en) * | 2017-12-12 | 2018-05-04 | 云南农业大学 | A kind of heavy-metal contaminated soil composite passivant and its preparation method and application |
| CN108889773A (en) * | 2018-05-29 | 2018-11-27 | 深圳文科园林股份有限公司 | A kind of cadmium pollution mine soil renovation agent and preparation and application method |
| CN109092878A (en) * | 2018-07-04 | 2018-12-28 | 北京高能时代环境技术股份有限公司 | It is a kind of for handling the stabilization agent and method of heavy-metal composite pollution soil |
| CN109575926A (en) * | 2018-11-26 | 2019-04-05 | 华中农业大学 | Cadmium arsenic combined contamination soil renovation agent |
| CN110423622A (en) * | 2019-08-08 | 2019-11-08 | 北京润鸣环境科技有限公司 | A kind of low sulfur type chromium-polluted soil renovation agent and preparation method thereof and application method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116376555A (en) * | 2023-04-04 | 2023-07-04 | 黄河水利委员会黄河水利科学研究院 | White mica-based calcium-magnesium loaded heavy metal passivator and preparation method and application thereof |
| CN116376555B (en) * | 2023-04-04 | 2023-11-24 | 黄河水利委员会黄河水利科学研究院 | White mica-based calcium-magnesium loaded heavy metal passivator and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107384427B (en) | Efficient composite stabilizer for mercury-contaminated soil and mercury-contaminated soil remediation method | |
| CN108641726B (en) | Compound reagent for repairing heavy metal contaminated soil and application thereof | |
| CN109013688B (en) | Heavy metal contaminated soil remediation method | |
| CN107033912B (en) | Heavy metal passivator and preparation method thereof | |
| CN104194795A (en) | Novel in-situ passivation modifier and preparing method thereof | |
| CN105419805A (en) | Preparing method for complex function repairing agent for treatment of heavy metal contaminated soil | |
| CN111234827B (en) | Heavy metal contaminated soil remediation agent and preparation method and application thereof | |
| CN106978191A (en) | It is a kind of to be used to repair lead in acid soil, cadmium, the compound stabilizer of arsenic pollution | |
| CN107418586B (en) | Granular south rice field acid soil conditioner taking rice husks as matrix | |
| CN111073660A (en) | Soil bioremediation agent and soil remediation method based on same | |
| CN110586642B (en) | Method for repairing lead-cadmium contaminated soil | |
| CN105623667A (en) | Soil remediation agent | |
| CN107446587B (en) | Preparation method and application of heavy metal contaminated soil/bottom mud stabilizer | |
| CN104070056A (en) | Stabilizing processing method of heavy metal contaminated soil | |
| CN111363557A (en) | Farmland passivator for treating soil heavy metal pollution and preparation method thereof | |
| CN107597787B (en) | Method for efficiently stabilizing mercury-containing waste residues | |
| CN110157451B (en) | Preparation method of arsenic-containing soil stabilizer compounded by modified lignocellulose and inorganic powder through ball mill | |
| CN112893447A (en) | Heavy metal contaminated soil remediation agent and remediation method | |
| CN107384419B (en) | Heavy metal aggregation fixing agent for soil remediation and preparation method thereof | |
| JP2007246296A (en) | Fly ash-based fertilizer and vegetation improving method by fly ash-based fertilizer | |
| CN106753414B (en) | Heavy metal passivator and preparation method and application thereof | |
| CN110016345B (en) | Cadmium-reducing arsenic-stabilizing soil passivator and use method thereof | |
| CN111440614A (en) | Preparation and application methods of green efficient soil conditioner | |
| CN110791292A (en) | Repairing agent suitable for lead-polluted soil and preparation method thereof | |
| KR102456304B1 (en) | Preparing method of hydrochar stabilizers based on wood waste comprising magnesium ferrite nanoparticles and Stabilization method for contaminated soil comprising arsenic and cation mixed using thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210604 |
|
| RJ01 | Rejection of invention patent application after publication |