CN102070235B - Water-soluble organic thiamine heavy metal chelating agent and preparation method thereof - Google Patents
Water-soluble organic thiamine heavy metal chelating agent and preparation method thereof Download PDFInfo
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- CN102070235B CN102070235B CN2010105429212A CN201010542921A CN102070235B CN 102070235 B CN102070235 B CN 102070235B CN 2010105429212 A CN2010105429212 A CN 2010105429212A CN 201010542921 A CN201010542921 A CN 201010542921A CN 102070235 B CN102070235 B CN 102070235B
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- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 66
- 239000002738 chelating agent Substances 0.000 title claims abstract description 29
- 235000019157 thiamine Nutrition 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- JZRWCGZRTZMZEH-UHFFFAOYSA-N Thiamine Natural products CC1=C(CCO)SC=[N+]1CC1=CN=C(C)N=C1N JZRWCGZRTZMZEH-UHFFFAOYSA-N 0.000 title abstract 2
- KYMBYSLLVAOCFI-UHFFFAOYSA-N thiamine Chemical compound CC1=C(CCO)SCN1CC1=CN=C(C)N=C1N KYMBYSLLVAOCFI-UHFFFAOYSA-N 0.000 title abstract 2
- 229960003495 thiamine Drugs 0.000 title abstract 2
- 239000011721 thiamine Substances 0.000 title abstract 2
- 239000002351 wastewater Substances 0.000 claims abstract description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 8
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 150000003544 thiamines Chemical class 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 7
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 4
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical group CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 abstract description 32
- 238000001556 precipitation Methods 0.000 abstract description 14
- 229920000768 polyamine Polymers 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000002244 precipitate Substances 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000000049 pigment Substances 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 238000009713 electroplating Methods 0.000 abstract 1
- 150000007529 inorganic bases Chemical class 0.000 abstract 1
- 125000001741 organic sulfur group Chemical group 0.000 abstract 1
- 239000008213 purified water Substances 0.000 abstract 1
- 238000004381 surface treatment Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 8
- 239000011651 chromium Substances 0.000 description 7
- 238000007599 discharging Methods 0.000 description 7
- 239000011133 lead Substances 0.000 description 7
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 6
- 238000010668 complexation reaction Methods 0.000 description 6
- 229910001431 copper ion Inorganic materials 0.000 description 6
- 239000006228 supernatant Substances 0.000 description 6
- 239000010949 copper Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000006386 neutralization reaction Methods 0.000 description 4
- 229910001453 nickel ion Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000012716 precipitator Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- -1 amine compound Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
The invention discloses a water-soluble organic thiamine heavy metal chelating agent and a preparation method thereof. The molecular formula of the heavy metal chelating agent is C2H4N2S4. The preparation method comprises the following steps: dissolving 100-500mL of polyamine in 100mL of purified water, dissolving 50-200mL of organic sulfur in 100mL of absolute alcohol, then adding 5-10mL of emulsifier, mixing the two solutions, heating the solutions with 40-50 DEG C of water bath, adding 5-20g of solid inorganic base while keeping stirring, reacting for 6-8h, cooling to less than 10 DEG C to crystallize, separating out the solid, and washing with absolute alcohol. The chelating agent of the invention can rapidly react with various heavy metal ions in wastewater and chelating heavy metal ions; precipitation can be performed rapidly; and heavy metals can be recycled easily from the generated precipitate and secondary pollutions can be reduced. The heavy metal chelating agent has cheap raw materials and simple equipment and is suitable for the wastewater treatment in the industries such as printed circuit boards, electroplating, pigments, metal surface treatment and battery production.
Description
Technical field
The present invention relates to the removal technology of heavy metal ion in the trade effluent, is a kind of water-soluble organic thiamines heavy metal chelating agent and preparation method thereof specifically.Cu in this trapping agent and the waste water at normal temperatures
2+, Ni
2+, Cd
2+, Hg
2+, Pb
2+, Cr
3+Etc. heavy metal ion and complexation heavy metal ion generation rapid reaction, generate infusible precipitate, thereby heavy metal ion is removed from water.
Background technology
Often contain heavy metal ion or complexation heavy metal ions such as chromium, cadmium, nickel, copper, lead, zinc in the trade effluent.In water body, because the refractory organics and the toxic of heavy metal ion have a strong impact on generations such as fishery and agriculturals, and heavy metal ion can also be at human body and biological cylinder accumulation, and can't be degraded by microorganisms, and is detrimental to health directly or indirectly.
The neutralization precipitation method is the method for a kind of development processing heavy metal ion the earliest, also be the most generally, one of the simplest method.It is through adding basic agents such as lime, soda, mineral alkali, and the pH value of waste water is adjusted to the scope that makes heavy metal ion have minimal solubility, and its form with oxyhydroxide or carbonate is precipitated.When containing both sexes heavy metal ion such as aluminium, zinc in the waste water, the neutralization precipitation method needs strict control pH value, otherwise the precipitate metal hydroxides of generation is dissolved under the situation of high pH once more.In addition, the neutralization precipitation method can not be removed the complexation heavy metal ion in the water.
Sulphide precipitation is in containing the waste water of heavy metal ion, to add vulcanizing agent, because heavy metal ion and sulfonium ion have very strong avidity, can generate the very little sulfide precipitation of solubility product, thereby reaches the purpose of removing heavy metal ion.Compare with the neutralization precipitation method; The advantage that sulphide precipitation has is: heavy metal sulfide solubleness is lower than the solubleness of its oxyhydroxide; Thereby improve removal of heavy metal ions efficient, and reaction pH value is between 7-9, the waste water after the processing generally need not neutralize.Yet the shortcoming that sulphide precipitation has is: the sulfide precipitation composition granule is little, is prone to form colloid, is not easy deposition; The sulfide precipitation agent is originally residual in water, meets acid and generates hydrogen sulfide, produces secondary pollution.
The heavy metal chelating agent precipitator method are to utilize the N of heavy metal chelating agent own, S ligating atom and heavy metal intensive sequestering action, generate water-fast metallo-chelate, thereby reach the purpose of removing heavy metal ion.The heavy metal chelating agent precipitator method are compared with sulphide precipitation, and its advantage is: floc particle is big and closely knit, and sedimentation function is good, and the heavy metal ion residual concentration is low, can use in pH scope widely, and can not produce hydrogen sulfide.But also there is defective in the heavy metal chelating agent precipitator method, and present most of heavy metal chelating agents water-soluble relatively poor influences the efficient that it removes heavy metal ion.
Summary of the invention
The objective of the invention is to: the defective that overcomes prior art; A kind of water-soluble organic thiamines heavy metal chelating agent and preparation method thereof is provided, and the present invention is in the aqueous solution of alkalescence, through polyamines and organosulfur reaction; Generate the organosulfur amine compound; Through crystallisation by cooling and absolute ethanol washing, purify at last, make a kind of water-soluble organic thiamines heavy metal chelating agent.Water-soluble organic thiamines heavy metal chelating agent of the present invention at normal temperatures can with the Cu in the waste water
2+, Ni
2+, Cd
2+, Hg
2+, Pb
2+, Cr
3+Etc. heavy metal ion and complexation heavy metal ion rapid reaction, generate the heavy metal precipitation thing, through solid-liquid separation, reach the purpose of removing heavy metal ion in the water.
The object of the invention is realized through following technical scheme:
A kind of water-soluble organosulfur ammonium heavy metal chelating agent, its molecular formula is C
2H
4N
2S
4, structural formula is:
The preparation method of above-mentioned water-soluble organosulfur ammonium heavy metal chelating agent comprises the steps:
(1) the 100-500mL polyamines is dissolved in during 100mL purifies waste water, is mixed with polyamines-aqueous solution;
(2) the 50-200mL organosulfur is dissolved in the 100mL absolute ethyl alcohol, adds the 5-10mL mass concentration again and be 100% emulsifying agent, be mixed with organosulfur-ethanol solution;
(3) polyamines-aqueous solution is mixed with organosulfur-ethanol solution be placed on 40-50 ℃ of water bath with thermostatic control heating, and under whipped state, add 5-20g mineral alkali solid, under agitation react 6-8h;
(4) be cooled to below 10 ℃ after the crystallization, isolate solid through suction filtration, use absolute ethanol washing 2 times again after, drying can obtain water-soluble organic thiamines heavy metal chelating agent.
The used emulsifying agent of above-mentioned preparation method is an ethoxylated dodecyl alcohol.
The used polyamines of above-mentioned preparation method is a Hydrazine Hydrate 80.
The used organosulfur of above-mentioned preparation method is a dithiocarbonic anhydride.
The used mineral alkali solid of above-mentioned preparation method is sodium hydroxide or Pottasium Hydroxide.
The used drying means of above-mentioned preparation method is vacuum-drying, and drying temperature is 25-45 ℃.
The trapping agent of method for preparing is used for removing the heavy metal ion of waste water.
The trapping agent of method for preparing and flocculation agent SEPIGEL 305 are used.
Concentration and kind to heavy metal ions in wastewater; Can add appropriate amount water-soluble organic thiamines heavy metal chelating agent of the present invention separately; Also can wait other water conditioner to be used with flocculation agent SEPIGEL 305 (being called for short PAM); Through stirring reaction, generate the big and closely knit flco of particle, rapid subsidence.The concentration of heavy metal ion is lower than discharging standards in the processed waste water, and the throw out that produces is easy to reclaim heavy metal, can not produce secondary pollution.This water-soluble organic thiamines heavy metal chelating agent also can be used for noble metal in the recycle-water solution, can turn waste into wealth to a certain extent.
The present invention compared with prior art has following advantage and beneficial effect:
(1) trapping agent of the present invention is water-soluble better, reaches 15g100g water 20 ℃ of following solubleness
-1Thereby, trapping agent can fully be reacted with various heavy metal ions in waste water.
(2) heavy metal ion in the waste water and complexation heavy metal ion are reacted rapidly, the heavy metal precipitation composition granule of generation is big, and settling property is good, is easy to solid-liquid separation.
(3) trapping agent of the present invention can use under the condition of strong acid, compares with existing technology, reduces the dosage of alkali.
(4) trapping agent Cu of the present invention
2+, Ni
2+, Cd
2+, Hg
2+, Pb
2+, Cr
3+Clearance etc. heavy metal ion and complexation heavy metal ion all can reach more than 99%.
(5) cost of material required for the present invention is cheap, and preparation technology and equipment are simple, and is easy to operate, applicable to the wastewater treatment of industries such as PC board, plating, pigment, metal finishing and battery production.
Embodiment
Below in conjunction with specific embodiment the present invention is done further concrete detailed description the in detail, but embodiment of the present invention is not limited thereto, the processing parameter for not indicating especially can carry out with reference to routine techniques.
Below in conjunction with embodiment, the present invention is elaborated
Embodiment 1
The 100mL Hydrazine Hydrate 80 is dissolved in during 100mL purifies waste water, and is mixed with Hydrazine Hydrate 80-aqueous solution; 50mL dithiocarbonic anhydride is dissolved in the 100mL absolute ethyl alcohol, adds the 5mL ethoxylated dodecyl alcohol again, is mixed with dithiocarbonic anhydride-ethanol solution; After above-mentioned two kinds of solution mixing, 40 ℃ of waters bath with thermostatic control heating, under agitation; Add 5g sodium hydroxide, reaction 6h, be cooled to 10 ℃ of following crystallizations after; Suction filtration 30 ℃ of following vacuum-dryings, obtains water-soluble organic thiamines heavy metal chelating agent crystal of white with absolute ethanol washing crystal 2 time back.
Embodiment 2
The difference of present embodiment and embodiment 1 is: proportioning raw materials and processing parameter, specifically see table 1 for details.
Embodiment 3
The difference of present embodiment and embodiment 1 is: proportioning raw materials and processing parameter, specifically see table 1 for details.
Embodiment 4
The difference of present embodiment and embodiment 1 is: proportioning raw materials and processing parameter, specifically see table 1 for details.
Table 1
Processing parameter | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
Polyamines/mL | ?100 | ?200 | ?300 | ?500 |
Purify waste water/mL | ?100 | ?100 | ?100 | ?100 |
Absolute ethyl alcohol/mL | ?100 | ?100 | ?100 | ?100 |
Organosulfur/mL | ?50 | ?100 | ?150 | ?200 |
Mineral alkali/g | ?5 | ?10 | ?15 | ?20 |
Emulsifying agent/mL | ?5 | ?7 | ?9 | ?10 |
Water bath with thermostatic control/℃ | ?40 | ?45 | ?45 | ?50 |
Reaction times/h | ?6 | ?7 | ?8 | ?8 |
Select Guangzhou company electronics waste water for use, recording EDTA complex copper ion concentration is 105.32mgL
-1, the pH value is 4.2, adds water-soluble organic thiamines heavy metal chelating agent 300mgL of embodiment 1-4 respectively
-1, stir speed (S.S.) is 60rmin
-1, static behind the reaction 3min, get its copper ion concentration of supernatant mensuration and be respectively 0.42mgL
-1, 0.38mgL
-1, 0.31mgL
-1And 0.26mgL
-1, copper ion concentration all reaches discharging standards, and adds non-water-soluble organic thiamines heavy metal chelating agent DTC (EDA) of same amount, and after handling above-mentioned waste water under the identical condition, getting its copper ion concentration of supernatant mensuration is 5.38mgL
-1, copper ion concentration is higher than discharging standards.
Select Guangzhou company PC board waste water for use, recording nickel ion concentration is 25.16mgL
-1, the pH value is 5.3, adds water-soluble organic thiamines heavy metal chelating agent 80mgL of embodiment 1-4 respectively
-1, stir speed (S.S.) is 60rmin
-1, static behind the reaction 3min, get its copper ion concentration of supernatant mensuration and be respectively 0.72mgL
-1, 0.58mgL
-1, 0.45mgL
-1And 0.39mgL
-1, nickel ion concentration all reaches discharging standards, and adds non-water-soluble organic thiamines heavy metal chelating agent DTC (EDA) of same amount, and after handling above-mentioned waste water under the identical condition, getting its nickel ion concentration of supernatant mensuration is 1.17mgL
-1, nickel ion concentration is higher than discharging standards.
Select somewhere, Guangdong mine wastewater for use, record Cd
2+, Hg
2+, Pb
2+, Cr
3+Concentration is respectively 5.6mgL
-1, 2.7mgL
-1, 14.3mgL
-1, 7.3mgL
-1, the pH value is 2.3, adds water-soluble organic thiamines heavy metal chelating agent 60mgL of embodiment 1-4 respectively
-1, stir speed (S.S.) is 60rmin
-1, static behind the reaction 3min, get supernatant and measure its Cd
2+, Hg
2+, Pb
2+, Cr
3+Concentration is respectively 0.08mgL
-1, 0.02mgL
-1, 0.5mgL
-1And 0.9mgL
-10.07mgL
-1, 0.04mgL
-1, 0.4mgL
-1And 0.3mgL
-10.05mgL
-1, 0.03mgL
-1, 0.5mgL
-1And 0.3mgL
-10.02mgL
-1, 0.01mgL
-1, 0.75mgL
-1And 0.69mgL
-1Each ionic concn all reaches discharging standards, and adds non-water-soluble organic thiamines heavy metal chelating agent DTC (EDA) of same amount, after handling above-mentioned waste water under the identical condition, gets supernatant and measures its Cd
2+, Hg
2+, Pb
2+, Cr
3+Concentration is respectively 0.18mgL
-1, 0.22mgL
-1, 1.5mgL
-1And 2.9mgL
-1, each ionic concn all is higher than discharging standards.
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (4)
1. the preparation method of a water-soluble organic thiamines heavy metal chelating agent is characterized in that, comprises the steps:
(1) the 100-500mL Hydrazine Hydrate 80 is dissolved in during 100mL purifies waste water, is mixed with Hydrazine Hydrate 80-aqueous solution;
(2) 50-200mL dithiocarbonic anhydride is dissolved in the 100mL absolute ethyl alcohol, adds the 5-10mL mass concentration again and be 100% emulsifying agent, be mixed with dithiocarbonic anhydride-ethanol solution;
(3) Hydrazine Hydrate 80-aqueous solution is mixed with dithiocarbonic anhydride-ethanol solution be placed on 40-50 ℃ of water bath with thermostatic control heating, and under whipped state, add 5-20g mineral alkali solid, under agitation react 6-8h;
(4) be cooled to below 10 ℃ after the crystallization, isolate solid through suction filtration, use absolute ethanol washing 2 times again after, drying promptly obtains water-soluble organic thiamines heavy metal chelating agent;
2. preparation method according to claim 1 is characterized in that, said emulsifying agent is an ethoxylated dodecyl alcohol.
3. preparation method according to claim 1 is characterized in that, said mineral alkali solid is sodium hydroxide or Pottasium Hydroxide.
4. preparation method according to claim 1 is characterized in that, said drying means is vacuum-drying, and drying temperature is 25-45 ℃.
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CN102942512A (en) * | 2012-11-21 | 2013-02-27 | 南京师范大学 | Preparation method of sulfide heavy metal trapping agent C2H4N2S4 |
CN104128159B (en) * | 2014-08-13 | 2016-04-20 | 陕西科技大学 | There is wastewater treatment material that photocatalysis and heavy metal adsorption function can be recycled and preparation method thereof |
CN104610972B (en) * | 2014-12-18 | 2017-12-08 | 淄博金鼎光电科技有限公司 | It is a kind of to be used to administer inorganic agent of heavy-metal contaminated soil and preparation method thereof |
CN104528910A (en) * | 2014-12-18 | 2015-04-22 | 淄博金鼎光电科技有限公司 | Synthetic process of heavy metal chelating agent |
CN106914205A (en) * | 2015-12-28 | 2017-07-04 | 沈阳中科环境工程科技开发有限公司 | The preparation method and special purpose device of a kind of novel heavy metal agent for capturing |
CN111282317A (en) * | 2020-03-11 | 2020-06-16 | 吕文广 | Method for removing solid particles in nickel-cobalt-manganese lithium salt and lithium battery material |
CN115772106A (en) * | 2022-11-04 | 2023-03-10 | 西北矿冶研究院 | Diamine bisdithiocarbamic acid sodium salt and preparation method thereof |
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DE19956726A1 (en) * | 1999-11-25 | 2001-05-31 | Wieland Edelmetalle | Removing heavy metal, especially nickel, ions from waste water in the metal processing industries by further treating the hydroxide precipitate with an excess of sulfide and then filtering and oxidizing the sulfide |
CN101628750A (en) * | 2009-09-10 | 2010-01-20 | 南京师范大学 | Sulfide heavy metal chelating agent and preparation method thereof |
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DE19956726A1 (en) * | 1999-11-25 | 2001-05-31 | Wieland Edelmetalle | Removing heavy metal, especially nickel, ions from waste water in the metal processing industries by further treating the hydroxide precipitate with an excess of sulfide and then filtering and oxidizing the sulfide |
CN101628750A (en) * | 2009-09-10 | 2010-01-20 | 南京师范大学 | Sulfide heavy metal chelating agent and preparation method thereof |
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