CN101219829A - Method for removing As(III) in water - Google Patents
Method for removing As(III) in water Download PDFInfo
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- CN101219829A CN101219829A CNA2008100638708A CN200810063870A CN101219829A CN 101219829 A CN101219829 A CN 101219829A CN A2008100638708 A CNA2008100638708 A CN A2008100638708A CN 200810063870 A CN200810063870 A CN 200810063870A CN 101219829 A CN101219829 A CN 101219829A
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Abstract
The invention relates to a method for removing As(III) in water, which belongs to a technical field of water treatment. The invention solves the problem of low removal rate, complex process, long time, high operation cost as well as production of the As(III) with a great amount of arsenic residue in prior art for the As(III) in the water. The removal method comprises the processes: the As(III) is oxidized as As(V) and then ferrous salt is added; the obtained substance is mixed, flocculated and then precipitated so as to remove the As(III) in the water. The method for removing As(III) in water provided by the invention has the advantages of up to over 99 percent of the removal As(III)rate in the water, simple process, short time, low operation cost as well as As(III) production with a small amount of arsenic residue.
Description
Technical field
The invention belongs to water-treatment technology field.
Background technology
Arsenic is carcinogenic, the mutagenesis factor, and animal is also had teratogenesis.Some cities of provinces such as Xinjiang of China, the Inner Mongol, Shaanxi, Guizhou, Jilin, Ningxia, Qinghai all exist the problem that arsenic exceeds standard in the tap water to some extent, and have caused the phenomenon of arseniasis in the crowd, and the poisoning geographic coverage is big." drinking water sanitary standard " regulation arsenic concentration surpasses 10 μ g/L and classifies superstandard drinking water as, so the arsenic of removing in the water in efficient, the inexpensive method of Chinese development has been problem demanding prompt solution.
At present, the common method of Removal of Arsenic in Drinking Water has the precipitator method and absorption method both at home and abroad.The precipitator method utilize 3 valency molysite, aluminium salt, sulfide and lime and arsenic to form the insoluble compound arsenic removal, experimental result shows that the effect of removing arsenic of 3 valency molysite is apparently higher than aluminium salt, 3 valency molysite have very high clearance to the As in the water (V), but 3 valency molysite are lower to the clearance of As (III), generally have only 60%～80%, and As (III) clearance is improved, then need to add 3 a large amount of valency molysite, increase cost, also can form a large amount of unmanageable arsenic-containing waste residues, environment is caused secondary pollution.Absorption method mainly comprises activated alumina method, iron oxide process, zeolite and rare earth class absorption method, but absorption method is better to the removal effect of As (V), can not effectively remove As (III), and the sorbent material consumption is big, complex process, time is long, and the adsorptive power behind the adsorbent reactivation descends, the running cost height.
Summary of the invention
The present invention seeks to that prior art is low to the clearance of As in the water (III) in order to solve, complex process, the time is long, running cost is high and produce the problem of a large amount of arsenic-containing waste residues, and provides the method for As (III) in a kind of removal water.
The method of As (III) realizes according to the following steps in a kind of removal water: one, preoxidation: add oxygenant in containing As (III) water, making the As (III) and the chemical dosage ratio of oxygenant is 1: 1～2, add ferrous salt behind speed stirring 1～5min with 280～320r/min, the mol ratio that makes arsonium ion and ferrous ion is 1: 2～5, gets mixing solutions; Two, with the speed stirring 0.5～2min of mixing solutions with 100～200r/min, the speed with 20～60r/min stirs 15～40min postprecipitation, 20～40min again, can remove the As (III) in the water.
Technology of the present invention is simple, the time short, carry out preoxidation As (III) is converted into As (V) containing As (III) water by adding oxygenant, reduced the toxicity of arsenic, and remaining oxygenant of preoxidation stage can promote the follow-up ferrous hydrogen in statu nascendi ferric oxide that is converted into, also can promote arsenic the absorption of hydrogen in statu nascendi iron oxide surface and with hydrogen in statu nascendi ferric oxide generation co-precipitation; Remaining oxygenant of preoxidation stage can be avoided the excessive colourity rising that brings of oxygenant, the problem of irritating smell by ferrous reduction; The hydrogen in statu nascendi ferric oxide has stronger absorption and co-precipitation ability than the ironic hydroxide that common 3 valency iron salt coagulant hydrolysis produce, can effectively remove the As in the water (III), clearance reaches more than 99%, and the coagulating agent consumption significantly reduces, the output of arsenic-containing waste residue also reduces simultaneously, has reduced follow-up arsenic-containing waste residue processing costs; The price of raw material ferrous salt only is about 1/3rd of 3 valency molysite, has reduced working cost.
Embodiment
Embodiment one: the method for As (III) realizes according to the following steps in a kind of removal water of present embodiment: one, preoxidation: add oxygenant in containing As (III) water, making the As (III) and the chemical dosage ratio of oxygenant is 1: 1～2, add ferrous salt behind speed stirring 1～5min with 280～320r/min, the mol ratio that makes arsonium ion and ferrous ion is 1: 2～5, gets mixing solutions; Two, with the speed stirring 0.5～2min of mixing solutions with 100～200r/min, the speed with 20～60r/min stirs 15～40min postprecipitation, 20～40min again, can remove the As (III) in the water.
Ferrous salt in the present embodiment is ferrous sulfate or iron protochloride.
Embodiment two: what present embodiment and embodiment one were different is that used oxygenant is ozone, potassium ferrate, potassium permanganate, chlorine, clorox, ClO in the step 1
2Or Fenton reagent.Other step and parameter are identical with embodiment one.
The effect of oxygenant is that the As (III) that will contain in As (III) water is oxidized to As (V) in the present embodiment.
Embodiment three: present embodiment and embodiment one are different is As in the step 1 (III) and the chemical dosage ratio of oxygenant is 1: 1.5.Other step and parameter are identical with embodiment one.
Embodiment four: what present embodiment and embodiment one were different is that the speed with 300r/min stirs 3min in the step 1.Other step and parameter are identical with embodiment one.
Embodiment five: present embodiment and embodiment one are different is that the mol ratio of arsonium ion and ferrous ion is 1: 3 in the step 1.Other step and parameter are identical with embodiment one.
Embodiment six: what present embodiment and embodiment one were different is that the speed with 150r/min stirs 1min in the step 2.Other step and parameter are identical with embodiment one.
Embodiment seven: what present embodiment and embodiment one were different is that the speed with 40r/min stirs 25min postprecipitation 30min in the step 2.Other step and parameter are identical with embodiment one.
Embodiment eight: the method for As (III) realizes according to the following steps in a kind of removal water of present embodiment: one, preoxidation: add potassium ferrate in containing As (III) water, making the As (III) and the chemical dosage ratio of potassium permanganate is 1: 1, add ferrous salt behind the speed stirring 2min with 300r/min, the mol ratio that makes arsonium ion and ferrous ion is 1: 2.5, gets mixing solutions; Two, with the speed stirring 1min of mixing solutions with 120r/min, the speed with 40r/min stirs 30min postprecipitation 30min again, can remove the As (III) in the water.
Ferrous salt in the present embodiment is an iron protochloride.
Embodiment nine: the method for As (III) realizes according to the following steps in a kind of removal water of present embodiment: one, preoxidation: add potassium permanganate in containing As (III) water, making the As (III) and the chemical dosage ratio of potassium permanganate is 1: 1.4, add ferrous sulfate behind the speed stirring 2min with 300r/min, the mol ratio that makes arsonium ion and ferrous ion is 1: 2.5, gets mixing solutions; Two, with the speed stirring 1min of mixing solutions with 120r/min, the speed with 40r/min stirs 30min postprecipitation 30min again, can remove the As (III) in the water.
Test through simultaneous test, (in the iron) ferric sulfate or the ferrous sulfate that quality such as in containing As (III) water, add respectively, the clearance that adds As (III) in the water of 3 valency molysite under the identical situation of other condition is 78.4%, and the clearance that adds As (III) in the water of ferrous sulfate is 99.1%.The clearance of As in the present embodiment water (III) is apparently higher than 3 valency molysite.
Claims (7)
1. method of removing As (III) in the water, the method that it is characterized in that As (III) in a kind of removal water realizes according to the following steps: one, preoxidation: add oxygenant in containing As (III) water, making the As (III) and the chemical dosage ratio of oxygenant is 1: 1～2, add ferrous salt behind speed stirring 1～5min with 280～320r/min, the mol ratio that makes arsonium ion and ferrous ion is 1: 2～5, gets mixing solutions; Two, with the speed stirring 0.5～2min of mixing solutions with 100～200r/min, the speed with 20～60r/min stirs 15～40min postprecipitation, 20～40min again, can remove the As (III) in the water.
2. the method for As (III) in a kind of removal water according to claim 1 is characterized in that used oxygenant is ozone, potassium ferrate, potassium permanganate, chlorine, clorox, ClO in the step 1
2Or Fenton reagent.
3. the method for As (III) in a kind of removal water according to claim 1 is characterized in that the As in the step 1 (III) and the chemical dosage ratio of oxygenant are 1: 1.5.
4. the method for As (III) in a kind of removal water according to claim 1 is characterized in that the speed with 300r/min stirs 3min in the step 1.
5. the method for As (III) in a kind of removal water according to claim 1 is characterized in that the mol ratio of arsonium ion and ferrous ion is 1: 3 in the step 1.
6. the method for As (III) in a kind of removal water according to claim 1 is characterized in that the speed with 150r/min stirs 1min in the step 2.
7. the method for As (III) in a kind of removal water according to claim 1 is characterized in that the speed with 40r/min stirs 25min postprecipitation 30min in the step 2.
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| CNA2008100638708A CN101219829A (en) | 2008-01-18 | 2008-01-18 | Method for removing As(III) in water |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830551A (en) * | 2010-03-23 | 2010-09-15 | 中国地质大学（武汉） | In-situ arsenic removing method of underground water |
| CN101863565A (en) * | 2010-03-23 | 2010-10-20 | 中国地质大学（武汉） | Earth surface depth treatment method of high-arsenic underground water and system thereof |
| CN102863069A (en) * | 2012-10-12 | 2013-01-09 | 中国地质大学（北京） | Composite Fenton treatment method for herbicide pesticide wastewater |
| CN102951753A (en) * | 2012-11-12 | 2013-03-06 | 天津滨环化学工程技术研究院有限公司 | Agent and method for reducing COD (chemical oxygen demand) of phenolic wastewater |
| CN103663779A (en) * | 2013-11-19 | 2014-03-26 | 苏州丹百利电子材料有限公司 | Method for safely and efficiently treating arsenic waste water generated from arsenic hydride production |
| CN103693827A (en) * | 2013-12-10 | 2014-04-02 | 江苏绿威环保科技有限公司 | Pre-treatment method for dewatering sludge |
| CN103922458A (en) * | 2014-05-05 | 2014-07-16 | 哈尔滨工业大学 | Method for removing trace arsenic from water |
| CN103922514A (en) * | 2014-05-05 | 2014-07-16 | 哈尔滨工业大学 | Method for removing trace thallium contained in water |
| CN103936136A (en) * | 2014-05-14 | 2014-07-23 | 中国石油大学(华东) | Treatment method of trivalent arsenic in oxalic acid oxidized water body by ultraviolet excitation |
| CN104944625A (en) * | 2015-03-12 | 2015-09-30 | 许言 | Treatment method for copper smelting post-vulcanization solution and production wastewater |
| CN105130048A (en) * | 2015-08-23 | 2015-12-09 | 长春黄金研究院 | Method for processing low concentration arsenide in water |
| CN105753209A (en) * | 2016-03-03 | 2016-07-13 | 湖州欧美新材料有限公司 | Arsenic containing wastewater treatment method |
| CN106001096A (en) * | 2016-07-26 | 2016-10-12 | 湖南恒凯环保科技投资有限公司 | Ferrate oxidation co-precipitation-based arsenic-contaminated soil remediation method |
| CN106007076A (en) * | 2016-07-04 | 2016-10-12 | 赣州有色冶金研究所 | Treatment method of arsenic-containing wastewater in tungsten smelting |
| CN106477768A (en) * | 2016-10-31 | 2017-03-08 | 江西稀有金属钨业控股集团有限公司 | A kind of processing method of tungsten mineral material baking flue gas spent shower water |
| CN107129018A (en) * | 2017-06-27 | 2017-09-05 | 中国科学院沈阳应用生态研究所 | The method for concentration of arsenic in a kind of arsenic-containing waste water |
| CN108298731A (en) * | 2018-03-22 | 2018-07-20 | 沈阳建筑大学 | A kind of deeply removing arsenic system and device and its dearsenicating method |
| CN113860474A (en) * | 2021-11-10 | 2021-12-31 | 哈尔滨工业大学 | Method for removing heavy metals in neutral industrial wastewater by using biochar in cooperation with Fe (II) and dissolved oxygen |
| CN117303637A (en) * | 2023-10-16 | 2023-12-29 | 哈尔滨工业大学 | Nascent state nano-iron dynamic membrane interface assembly and enhanced arsenic removal method thereof |
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2008
- 2008-01-18 CN CNA2008100638708A patent/CN101219829A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863565A (en) * | 2010-03-23 | 2010-10-20 | 中国地质大学（武汉） | Earth surface depth treatment method of high-arsenic underground water and system thereof |
| CN101830551A (en) * | 2010-03-23 | 2010-09-15 | 中国地质大学（武汉） | In-situ arsenic removing method of underground water |
| CN102863069A (en) * | 2012-10-12 | 2013-01-09 | 中国地质大学（北京） | Composite Fenton treatment method for herbicide pesticide wastewater |
| CN102951753A (en) * | 2012-11-12 | 2013-03-06 | 天津滨环化学工程技术研究院有限公司 | Agent and method for reducing COD (chemical oxygen demand) of phenolic wastewater |
| CN103663779A (en) * | 2013-11-19 | 2014-03-26 | 苏州丹百利电子材料有限公司 | Method for safely and efficiently treating arsenic waste water generated from arsenic hydride production |
| CN103693827A (en) * | 2013-12-10 | 2014-04-02 | 江苏绿威环保科技有限公司 | Pre-treatment method for dewatering sludge |
| CN103922458A (en) * | 2014-05-05 | 2014-07-16 | 哈尔滨工业大学 | Method for removing trace arsenic from water |
| CN103922514A (en) * | 2014-05-05 | 2014-07-16 | 哈尔滨工业大学 | Method for removing trace thallium contained in water |
| CN103936136B (en) * | 2014-05-14 | 2016-01-20 | 中国石油大学(华东) | Ultraviolet excitation oxalic acid is utilized to be oxidized arsenious treatment process in water body |
| CN103936136A (en) * | 2014-05-14 | 2014-07-23 | 中国石油大学(华东) | Treatment method of trivalent arsenic in oxalic acid oxidized water body by ultraviolet excitation |
| CN104944625A (en) * | 2015-03-12 | 2015-09-30 | 许言 | Treatment method for copper smelting post-vulcanization solution and production wastewater |
| CN105130048A (en) * | 2015-08-23 | 2015-12-09 | 长春黄金研究院 | Method for processing low concentration arsenide in water |
| CN105753209A (en) * | 2016-03-03 | 2016-07-13 | 湖州欧美新材料有限公司 | Arsenic containing wastewater treatment method |
| CN106007076A (en) * | 2016-07-04 | 2016-10-12 | 赣州有色冶金研究所 | Treatment method of arsenic-containing wastewater in tungsten smelting |
| CN106001096A (en) * | 2016-07-26 | 2016-10-12 | 湖南恒凯环保科技投资有限公司 | Ferrate oxidation co-precipitation-based arsenic-contaminated soil remediation method |
| CN106477768A (en) * | 2016-10-31 | 2017-03-08 | 江西稀有金属钨业控股集团有限公司 | A kind of processing method of tungsten mineral material baking flue gas spent shower water |
| CN107129018A (en) * | 2017-06-27 | 2017-09-05 | 中国科学院沈阳应用生态研究所 | The method for concentration of arsenic in a kind of arsenic-containing waste water |
| CN108298731A (en) * | 2018-03-22 | 2018-07-20 | 沈阳建筑大学 | A kind of deeply removing arsenic system and device and its dearsenicating method |
| CN108298731B (en) * | 2018-03-22 | 2021-10-29 | 沈阳建筑大学 | Deep arsenic removal method |
| CN113860474A (en) * | 2021-11-10 | 2021-12-31 | 哈尔滨工业大学 | Method for removing heavy metals in neutral industrial wastewater by using biochar in cooperation with Fe (II) and dissolved oxygen |
| CN117303637A (en) * | 2023-10-16 | 2023-12-29 | 哈尔滨工业大学 | Nascent state nano-iron dynamic membrane interface assembly and enhanced arsenic removal method thereof |
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