CN108503006A - A kind of fixing-stable processing method of benzyl arsenic acid arsenic in waste water - Google Patents
A kind of fixing-stable processing method of benzyl arsenic acid arsenic in waste water Download PDFInfo
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- CN108503006A CN108503006A CN201810156912.6A CN201810156912A CN108503006A CN 108503006 A CN108503006 A CN 108503006A CN 201810156912 A CN201810156912 A CN 201810156912A CN 108503006 A CN108503006 A CN 108503006A
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- benzyl
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- 239000002351 wastewater Substances 0.000 title claims abstract description 35
- -1 benzyl arsenic acid arsenic Chemical compound 0.000 title claims abstract description 13
- 238000003672 processing method Methods 0.000 title claims abstract description 9
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 57
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000006104 solid solution Substances 0.000 claims abstract description 25
- 230000003647 oxidation Effects 0.000 claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 15
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 5
- 239000002244 precipitate Substances 0.000 claims abstract description 5
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 4
- 230000001376 precipitating effect Effects 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- SPBQTHJZZJMBJO-UHFFFAOYSA-N phenylmethoxyarsonic acid Chemical compound C(C1=CC=CC=C1)O[As](O)(O)=O SPBQTHJZZJMBJO-UHFFFAOYSA-N 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000001556 precipitation Methods 0.000 claims description 11
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 239000011790 ferrous sulphate Substances 0.000 claims description 6
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 6
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 4
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims description 2
- UKUVVAMSXXBMRX-UHFFFAOYSA-N 2,4,5-trithia-1,3-diarsabicyclo[1.1.1]pentane Chemical compound S1[As]2S[As]1S2 UKUVVAMSXXBMRX-UHFFFAOYSA-N 0.000 claims 2
- DYPHJEMAXTWPFB-UHFFFAOYSA-N [K].[Fe] Chemical compound [K].[Fe] DYPHJEMAXTWPFB-UHFFFAOYSA-N 0.000 claims 1
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 claims 1
- 238000002386 leaching Methods 0.000 abstract description 23
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 21
- 239000011707 mineral Substances 0.000 abstract description 21
- 150000001875 compounds Chemical class 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 229940000488 arsenic acid Drugs 0.000 abstract description 3
- 150000001495 arsenic compounds Chemical class 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000002203 pretreatment Methods 0.000 abstract description 2
- 235000010755 mineral Nutrition 0.000 description 20
- 238000012545 processing Methods 0.000 description 12
- 238000007664 blowing Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 238000000926 separation method Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 231100000331 toxic Toxicity 0.000 description 10
- 230000002588 toxic effect Effects 0.000 description 10
- 239000012153 distilled water Substances 0.000 description 9
- 239000011575 calcium Substances 0.000 description 5
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 5
- 229910017251 AsO4 Inorganic materials 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- RTFOOERBKBOMSV-UHFFFAOYSA-L calcium;hydrogen arsorate Chemical compound [Ca+2].O[As]([O-])([O-])=O RTFOOERBKBOMSV-UHFFFAOYSA-L 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- DJHGAFSJWGLOIV-UHFFFAOYSA-N Arsenic acid Chemical compound O[As](O)(O)=O DJHGAFSJWGLOIV-UHFFFAOYSA-N 0.000 description 1
- BKUJBTIUAJZPQG-UHFFFAOYSA-N C(C1=CC=CC=C1)[As] Chemical compound C(C1=CC=CC=C1)[As] BKUJBTIUAJZPQG-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- GYYLHZUIHDISBV-UHFFFAOYSA-N [Ca].O[As](O)(O)=O Chemical class [Ca].O[As](O)(O)=O GYYLHZUIHDISBV-UHFFFAOYSA-N 0.000 description 1
- 229940000489 arsenate Drugs 0.000 description 1
- 229940103357 calcium arsenate Drugs 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910009112 xH2O Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
Abstract
The present invention relates to a kind of fixing-stable processing methods of benzyl arsenic acid arsenic in waste water, belong to environmental technology field；Benzyl arsenic acid waste water is first carried out oxidation pre-treatment by this method reduces waste water COD, using molysite as precipitating reagent, after mixing, and the hydro-thermal reaction at 100 150 DEG C；Arsenic in waste water can be changed into the good slightly solubility compound precipitates-autunezite class Solid-solution Minerals of well-crystallized, stability, and solid solution compound also has the advantages that arsenic leaching concentration is low etc., to solve arsenic compound stability difference caused by problem of environmental pollution；Compared with traditional technology, gained compound precipitates long-time stability are good, stockpiling is safe and reliable.
Description
Technical field
The present invention relates to a kind of fixing-stable treatment technologies of arsenic in trade effluent, and in particular to a kind of benzyl arsenic acid production
The fixing-stable processing method of the discharged arsenic-containing waste water of process belongs to environmental technology field.
Background technology
Arsenic and its compound are considered as a kind of chemical substance for having height toxic action to organism, are internationally recognized
Carcinogenic, teratogenesis, the mutagenesis factor.The main forms that it causes damages to human body and environment based on arsenic-containing waste water,
It is mostly derived from the production process of the industries such as exploitation containing arsenic ore, the smelting of non-ferrous metal and chemical industry, pesticide.Wherein, in benzyl
Arsenic acid（C6H5CH2AsO(OH)2）The process of production will produce a large amount of benzyl arsenic acid waste water, and not only COD contents are high for this waste water
Ecological environment will be caused seriously to pollute if handling, being mishandling by also containing a large amount of organic and inorganic arsenic simultaneously.
Currently, the processing of benzyl arsenic acid waste water is typically that carbide slag or lime is added, treatment mechanism is to utilize calcium ion
Arsenic acid calcium salt sediment is generated with arsenate ionic reaction in water, solubilised state arsenic is removed using filtering off, the heavy arsenic slag of gained is generally
A variety of amorphous arsenic acid calcium compounds.The feeding lime into arsenic-containing waste water finds that calcium ion and arsenate ionic reaction can form Ca4
(OH)2(AsO4)2∙4H2O、Ca5(AsO4)3OH and Ca3(AsO)4)2∙11/3H2O、Ca3(AsO4)2∙xH2O、Ca5(AsO4)3OH、
CaHAsO4∙H2The different types of arsenic acid calcium salt compound such as O, the arsenic leaching concentration of these different types of arsenic acid calcium salt compounds
There are very big difference, but superstate standard limited value 5mg/L；In addition, a large amount of research shows that arsenic acid calcium salt compound exposes for a long time
In air, it can be converted to calcium carbonate and arsenic acid with the carbon dioxide reaction in air, this reaction causes arsenic to drench because of carbonization
Go out, secondary pollution easily is caused to environment.
Poor in view of calcium arsenate salt compounds stability, leading to the arsenic of fixing-stable, there are secondary pollution hidden danger, therefore, profit
It has been trend of the times with new span fixing-stable arsenic is formed.
Invention content
The present invention provides a kind of fixing-stable processing methods of benzyl arsenic acid arsenic in waste water, at ambient temperature, first will
Benzyl arsenic acid waste water carries out air aeration oxidation pre-treatment, reduces waste water COD and dissociation organic group and arsenic atom is formed by
Organo-arsenic, using benzyl arsenic acid waste water composition characteristic, using molysite as precipitating reagent, by controlling precipitating reagent weight（Iron and arsenic rub
That ratio >=2.5）, after mixing, the good indissoluble of hydro-thermal reaction 2-10h formation well-crystallized, stability at 100-150 DEG C
Property compound precipitates-autunezite class Solid-solution Minerals, and such solid solution has the advantages that arsenic leaching concentration is low etc., to solve
Problem of environmental pollution caused by previous arsenic compound stability difference.
Benzyl arsenic acid waste water of the present invention is the arsenic-containing waste water discharged in benzyl arsenic acid production process, pH=1.0-
2.5。
Molysite deposition agent of the present invention is ferric sulfate, ferrous sulfate, ferric nitrate, ferrous nitrate, iron chloride, protochloride
One kind or arbitrary ratio in iron it is several.
Wastewater Pretreatment of the present invention is that blowing air carries out aerating oxidation processing, and COD removal rates are up to 85% or more.
Advantageous effect：
(1) method using jarosites forming process fixing-stable arsenic of the invention, it is easy to operate, it is easily controllable,
Without special installation, other impurity effects hardly in by waste water；
(2) method using jarosites forming process fixing-stable arsenic of the invention, gained slightly solubility precipitate chemical combination
Object stockpiling for a long time more stablizes, is safe and reliable, overcomes the arsenic acid calcium salt compound of conventional lime precipitation method formation, and arsenic leaches dense
Degree is big, long-term be exposed in air causes arsenic the pollution problems such as to drench with carbon dioxide reaction.
Specific implementation mode
Invention is further described in detail by the following examples, but the scope of the present invention is not limited in described
Hold.
Embodiment 1：
At ambient temperature, make its COD removal rate up to 90% the processing of benzyl arsenic acid waste water blowing air aerating oxidation；Later, herein
Ferrous sulfate is added in system（The molar ratio of iron and arsenic is 2.5）, it is sufficiently stirred 30min, the hydro-thermal reaction 5h at 150 DEG C, instead
It is separated by solid-liquid separation after answering；Isolated autunezite class Solid-solution Minerals are washed with distilled water 5 times, finally in room temperature
It is 5 days dry under environment, it obtains dry autunezite class Solid-solution Minerals precipitation and carries out arsenic toxic leaching test：Arsenic leaching concentration is
0.3mg/L。
Embodiment 2：
At ambient temperature, make its COD removal rate up to 86% the processing of benzyl arsenic acid waste water blowing air aerating oxidation；Later, herein
Ferrous sulfate is added in system（The molar ratio of iron and arsenic is 3.0）, it is sufficiently stirred 30min, the hydro-thermal reaction 10h at 120 DEG C, instead
It is separated by solid-liquid separation after answering；Isolated autunezite class Solid-solution Minerals are washed with distilled water 5 times, finally in room temperature
It is 5 days dry under environment, it obtains dry autunezite class Solid-solution Minerals precipitation and carries out arsenic toxic leaching test：Arsenic leaching concentration
0.5mg/L。
Embodiment 3：
At ambient temperature, make its COD removal rate up to 87% the processing of benzyl arsenic acid waste water blowing air aerating oxidation；Later, herein
Ferric sulfate is added in system（The molar ratio of iron and arsenic is 2.5）, it is sufficiently stirred 30min, the hydro-thermal reaction 10h at 100 DEG C, reaction
After be separated by solid-liquid separation；Isolated autunezite class Solid-solution Minerals are washed with distilled water 5 times, finally in room temperature ring
It is 5 days dry under border, it obtains dry autunezite class Solid-solution Minerals precipitation and carries out arsenic toxic leaching test：Arsenic leaching concentration
0.8mg/L。
Embodiment 4：
At ambient temperature, make its COD removal rate up to 88% the processing of benzyl arsenic acid waste water blowing air aerating oxidation；Later, herein
Ferric sulfate is added in system（The molar ratio of iron and arsenic is 3.0）, it is sufficiently stirred 30min, the hydro-thermal reaction 10h at 130 DEG C, reaction
After be separated by solid-liquid separation；Isolated autunezite class Solid-solution Minerals are washed with distilled water 5 times, finally in room temperature ring
It is 5 days dry under border, it obtains dry autunezite class Solid-solution Minerals precipitation and carries out arsenic toxic leaching test：Arsenic leaching concentration
0.6mg/L。
Embodiment 5：
At ambient temperature, make its COD removal rate up to 88% the processing of benzyl arsenic acid waste water blowing air aerating oxidation；Later, herein
Ferric nitrate is added in system（The molar ratio of iron and arsenic is 3.5）, it is sufficiently stirred 30min, the hydro-thermal reaction 3h at 140 DEG C, reaction
After be separated by solid-liquid separation；Isolated autunezite class Solid-solution Minerals are washed with distilled water 5 times, finally in room temperature ring
It is 5 days dry under border, it obtains dry autunezite class Solid-solution Minerals precipitation and carries out arsenic toxic leaching test：Arsenic leaching concentration
0.6mg/L。
Embodiment 6：
At ambient temperature, make its COD removal rate up to 91% the processing of benzyl arsenic acid waste water blowing air aerating oxidation；Later, herein
Ferrous nitrate is added in system（The molar ratio of iron and arsenic is 4.5）, it is sufficiently stirred 30min, the hydro-thermal reaction 3h at 125 DEG C, instead
It is separated by solid-liquid separation after answering；Isolated autunezite class Solid-solution Minerals are washed with distilled water 5 times, finally in room temperature
It is 5 days dry under environment, it obtains dry autunezite class Solid-solution Minerals precipitation and carries out arsenic toxic leaching test：Arsenic leaching concentration
0.3mg/L。
Embodiment 7：
At ambient temperature, make its COD removal rate up to 91% the processing of benzyl arsenic acid waste water blowing air aerating oxidation；Later, herein
Frerrous chloride is added in system（The molar ratio of iron and arsenic is 4.5）, it is sufficiently stirred 30min, the hydro-thermal reaction 8h at 110 DEG C, instead
It is separated by solid-liquid separation after answering；Isolated autunezite class Solid-solution Minerals are washed with distilled water 5 times, finally in room temperature
It is 5 days dry under environment, it obtains dry autunezite class Solid-solution Minerals precipitation and carries out arsenic toxic leaching test：Arsenic leaching concentration
0.5mg/L。
Embodiment 8：
At ambient temperature, make its COD removal rate up to 90% the processing of benzyl arsenic acid waste water blowing air aerating oxidation；Later, herein
Iron chloride is added in system（The molar ratio of iron and arsenic is 3.5）, it is sufficiently stirred 30min, the hydro-thermal reaction 4h at 135 DEG C, reaction
After be separated by solid-liquid separation；Isolated autunezite class Solid-solution Minerals are washed with distilled water 5 times, finally in room temperature ring
It is 5 days dry under border, it obtains dry autunezite class Solid-solution Minerals precipitation and carries out arsenic toxic leaching test：Arsenic leaching concentration
0.4mg/L。
Embodiment 9：
At ambient temperature, make its COD removal rate up to 89% the processing of benzyl arsenic acid waste water blowing air aerating oxidation；Later, herein
Ferrous sulfate and frerrous chloride are added in system（The molar ratio of mass ratio 1: 1, iron and arsenic is 2.5）, it is sufficiently stirred 30min,
Hydro-thermal reaction 2h, is separated by solid-liquid separation after reaction at 145 DEG C.Isolated autunezite class Solid-solution Minerals distillation
Water washing 5 times, it is finally 5 days dry under room temperature environment, it obtains dry autunezite class Solid-solution Minerals precipitation and carries out arsenic poison
Leaching test：Arsenic leaching concentration 0.6mg/L.
Embodiment 10：
At ambient temperature, make its COD removal rate up to 91% the processing of benzyl arsenic acid waste water blowing air aerating oxidation；Later, herein
Ferrous sulfate and sulfuric acid frerrous chloride are added in system（The molar ratio of mass ratio 2: 1, iron and arsenic is 2.5）, it is sufficiently stirred
30min, hydro-thermal reaction 3h, is separated by solid-liquid separation after reaction at 115 DEG C；Isolated autunezite class solid solution mine
Object is washed with distilled water 5 times, finally 5 days dry under room temperature environment, obtain dry autunezite class Solid-solution Minerals precipitate into
Row arsenic toxic leaching test：Arsenic leaching concentration 0.5mg/L.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention；For people in the art
For member, every any modification, equivalent substitution, improvement and etc. done without departing from the spirit and concept in the present invention,
Within protection scope of the present invention.
Claims (4)
1. a kind of fixing-stable processing method of benzyl arsenic acid arsenic in waste water, it is characterised in that：At room temperature, useless to benzyl arsenic acid
Water carries out air aeration oxidation processes, then carries out precipitation process to oxidized pretreated arsenic-containing waste water, forms arsenic yellow potassium iron
Vitriol solid solution precipitates, and realizes the fixing-stable of arsenic.
2. the fixing-stable processing method of benzyl arsenic acid arsenic in waste water according to claim 1, it is characterised in that：Place of settling
Reason is using molysite as precipitating reagent, and after mixing, it is solid to form arsenic yellow krausite class by the hydro-thermal reaction 2-10h at 100-150 DEG C
Solution precipitates, wherein molar ratio >=2.5 of iron and arsenic.
3. the fixing-stable processing method of benzyl arsenic acid arsenic in waste water according to claim 2, it is characterised in that：Molysite is
One kind or arbitrary ratio in ferric sulfate, ferrous sulfate, ferric nitrate, ferrous nitrate, iron chloride, frerrous chloride it is several.
4. the fixing-stable processing method of benzyl arsenic acid arsenic in waste water according to claim 1, it is characterised in that：Air exposes
Gas oxidation processes are to COD removal rates up to 85% or more.
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Family
ID=63375208
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Cited By (1)
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| CN110255623A (en) * | 2019-07-24 | 2019-09-20 | 中国科学院过程工程研究所 | Iron arsenic separation method, separator and its application |
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|---|---|---|---|---|
| CN110255623A (en) * | 2019-07-24 | 2019-09-20 | 中国科学院过程工程研究所 | Iron arsenic separation method, separator and its application |
| CN110255623B (en) * | 2019-07-24 | 2021-12-14 | 中国科学院过程工程研究所 | Iron and arsenic separation method, separation device and application thereof |
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