CN101348298A - Rapid method for removing chromium in waste water - Google Patents
Rapid method for removing chromium in waste water Download PDFInfo
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- CN101348298A CN101348298A CNA2008101465335A CN200810146533A CN101348298A CN 101348298 A CN101348298 A CN 101348298A CN A2008101465335 A CNA2008101465335 A CN A2008101465335A CN 200810146533 A CN200810146533 A CN 200810146533A CN 101348298 A CN101348298 A CN 101348298A
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Abstract
A method for quick removal of chromium from waste water relates to a method for the treatment of waste water or sewage, in particular to a method for preparing a quick chromium removing agent for the treatment of chromium-containing waste water. The method takes iron sulfide as a chromium removing agent, and is characterized in that the chromium removing process comprises the following steps that (1) iron sulfide is crushed and sieved by a 300 mesh sieve, and the sieved fine powder is taken out; (2) water is added in the fine powder obtained at step (1), and the paste is mixed till solid-liquid weight ratio is between 1 to 3 and 1 to 4; moreover, pH value is adjusted to between 4 and 6 and then the paste is stirred and boiled; (3) tetrakis hydroxymethyl phosphonium sulfate (THPS) is added in the solution obtained at step (2) with the adding quantity accounting for 0.1 to 0.4 of the weight of iron sulfide solid, and then the mixture is stirred and heated to 80 to 95 DEG C; (4) heating is stopped when solid-liquid weight ratio is between 1 to 1 and 1 to 2, and then filtration is carried out to obtain solid and filtrate; and (5) the filtrate obtained at step (4) is used as a chromium removing agent, and is added in waste water to remove chromium. The chromium removing agent has the advantages of simple preparation method, cheap raw materials and extremely strong treatment capacity and excellent treatment effect on chromium-containing waste water.
Description
Technical field
A kind of rapid method for removing chromium in waste water relates to the rapid method for removing chromium of a kind of processing waste water or sewage, particularly chromate waste water.
Background technology
At present, for the waste water of pollution of chromium, main adopt mainly contain following several method: (1) chemical precipitation method is divided into neutralization precipitation method and sulphide precipitation again; (2) redox is handled, and is divided into chemical reduction method, ferrite process and electrolytic process; (3) solvent extraction and separation method; (4) absorption method; (5) membrane separation technique; (6) ion exchange method; (7) bioremediation.All there is the drawback that equipment is loaded down with trivial details, cost is high in aforesaid method, and treatment effect is undesirable.
The U.S., Japan, China etc. study one after another with environmental mineral and administer chromate waste water in recent years, as CN 200510035580.9, CN 99109634.7, CN 03147583.3 usefulness pyrite/sulfurous iron ore processing waste water containing chrome, though material therefor is cheap and easy to get, but also exist consumption excessive, adsorptive capacity is little, shortcomings such as the treatment time is long were though can reusing of having lost efficacy because of surface deposition stops up eventually.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provides that a kind of material is cheap and easy to get, the chromium remover consumption is little, adsorptive capacity is big, and the treatment time is short, and chromium remover can reuse, the surface is difficult for the rapid method for removing chromium in waste water that lost efficacy.
The objective of the invention is to be achieved through the following technical solutions.
A kind of rapid method for removing chromium in waste water, adopting the sulfide of iron is chromium remover, it is characterized in that the dechromisation process comprises:
(1) sulfide of iron is pulverized, sieved, get sieve fine powder down;
(2) the resulting fine powder of step (1) is added water, size mixing to the solid-liquid weight ratio be 1: 3～1: 4, regulate pH value 4～6, stirring is boiled;
(3) in step (2) solution, add tetra methylol sulfuric acid phosphorus THPS, add-on be iron sulfide solid weight 0.1～0.4, stir, 80-95 ℃ of heating;
(4) be heated to the solid-liquid weight ratio at 1: 1～1: 2 o'clock, stop heating, filter, obtain solid and filtrate;
(5) step (4) being obtained filtrate does to carry out dechromisation in the chromium remover adding waste water.
A kind of rapid method for removing chromium in waste water of the present invention, the sulfide of described iron are the natural mineral of Iron sulfuret, pyrite, pyrrhotite, sulfurous iron ore, pyrite concentrate or one or more mixtures in the synthetic agent.Be preferably Iron sulfuret, also be preferably pyrite, pyrrhotite, more preferably monocline pyrrhotine.THPS easily degrades, does not have the danger of biogenic accumulation for being a kind of novel green water conditioner, has reductibility, can significantly increase the sulfide solubleness of iron.
A kind of rapid method for removing chromium in waste water of the present invention is characterized in that the solid that described step (4) filtration obtains, and returns step (2).
A kind of rapid method for removing chromium in waste water of the present invention, described step (4) is filtered the sulfide that adds iron in the filtrate that obtains, and airtight, lucifuge is preserved stand-by under the pH=4-5 condition.
A kind of rapid method for removing chromium in waste water of the present invention adopts cheap, environment-friendly type organic solvent, with the sulfide dissolving of iron wherein, prepare the liquid chromium remover, chromium remover is added in the chromate waste water, produce yellow mercury oxide at once, make that chromium content reaches emission standard in the waste water.Effectively reduce the chromate waste water processing cost, remove the middle chromium ion that anhydrates fast.Raw material sources are extensive, cheap, and environmental friendliness.
Embodiment
A kind of rapid method for removing chromium in waste water, adopting the sulfide of iron is chromium remover, this method may further comprise the steps: (1) pulverizes the sulfide of iron, crosses 300 mesh sieves; (2) the resulting fine powder of step (1) is added water, solid-liquid weight ratio 1: 3～1: 4 is regulated pH value 4-6, stirs, and boils 1h; (3) add tetra methylol sulfuric acid phosphorus (THPS) in step (2) solution, add-on is 0.1～0.4 of an amount of solid, stirs, 80-95 ℃ of heating for dissolving; (4) when liquid level decline, solid-to-liquid ratio 1: 1～1: 2 o'clock stops heating, filters, and filtrate is chromium remover and carries out dechromisation.The chromium remover storage method is: airtight toward the raw material that wherein adds a small amount of (1), and lucifuge, pH=4-5.
Embodiment 1
50 gram Iron sulfurets are pulverized, crossed 300 mesh sieves, put into encloses container, add water 200ml, regulate pH=6, stir, boil, add 5 gram THPS behind the 1h, stir, 80 ℃ of heating for dissolving; When liquid level decline, solid-liquid weight ratio 1: 1 o'clock stops heating, filters, and filtrate is chromium remover.
Get this chromium remover 0.3ml, add 200mg/l, 100ml in the pH=3 chromate waste water, produces yellow mercury oxide at once, leaves standstill, and pours out supernatant liquor, regulates pH=6, surveys total Cr concentration＜0.5mg/l, but qualified discharge.
Embodiment 2
50 gram monocline pyrrhotines are pulverized, crossed 300 mesh sieves, put into encloses container, add water 200ml, regulate pH=5, stir, boil, add 10 gram THPS behind the 1h, stir, 90 ℃ of heating for dissolving; When liquid level decline, solid-liquid weight ratio 1: 2 o'clock stops heating, filters, and filtrate is chromium remover.
Get this chromium remover 0.2ml, add 150mg/l, 100ml in the pH=4 chromate waste water, produces yellow mercury oxide at once, leaves standstill, and pours out supernatant liquor, regulates pH=6, surveys total Cr concentration＜0.5mg/l, but qualified discharge.
Embodiment 3
50 gram pyrite are pulverized, crossed 300 mesh sieves, put into encloses container, add water 250ml, regulate pH=4, stir, boil, add 15 gram THPS behind the 1h, stir, 95 ℃ of heating for dissolving; When liquid level decline, solid-liquid weight ratio 1: 2 o'clock stops heating, filters, and filtrate is chromium remover.
Get this chromium remover 0.15ml, add 100mg/l, 100ml in the pH=5 chromate waste water, produces yellow mercury oxide at once, leaves standstill, and pours out supernatant liquor, regulates pH=6, surveys total Cr concentration＜0.5mg/l, but qualified discharge.
Embodiment 4
50 gram sulfurous iron ore are pulverized, crossed 300 mesh sieves, put into encloses container, add water 250ml, regulate pH=5, stir, boil, add 20 gram THPS behind the 1h, stir, 95 ℃ of heating for dissolving; When liquid level decline, solid-liquid weight ratio 1: 2 o'clock stops heating, filters, and filtrate is chromium remover.
Get this chromium remover 0.1ml, add 50mg/l, 100ml in the pH=6 chromate waste water, produces yellow mercury oxide at once, leaves standstill, and pours out supernatant liquor, and pH=6 surveys total Cr concentration＜0.5mg/l, but qualified discharge.
Embodiment 5
50 gram pyrite concentrates are pulverized, crossed 300 mesh sieves, put into encloses container, add water 250ml, regulate pH=5, stir, boil, add 15 gram THPS behind the 1h, stir, 95 ℃ of heating for dissolving; When liquid level decline, solid-liquid weight ratio 1: 2 o'clock stops heating, filters, and filtrate is chromium remover.
Get this chromium remover 0.1ml, add 50mg/l, 100ml in the pH=9 chromate waste water, produces yellow mercury oxide at once, leaves standstill, and pours out supernatant liquor, regulates pH=7, surveys total Cr concentration＜0.5mg/l, but qualified discharge.
Claims (4)
1. rapid method for removing chromium in waste water, adopting the sulfide of iron is chromium remover, it is characterized in that the dechromisation process comprises:
(1) sulfide of iron is pulverized, crossed 300 mesh sieves, get sieve fine powder down;
(2) the resulting fine powder of step (1) is added water, size mixing to solid-liquid weight ratio 1: 3～1: 4, regulate pH value 4～6, stirring is boiled;
(3) in step (2) solution, add tetra methylol sulfuric acid phosphorus THPS, add-on be iron sulfide solid weight 0.1～0.4, stir, 80-95 ℃ of heating;
(4) be heated to the solid-liquid weight ratio at 1: 1～1: 2 o'clock, stop heating, filter, obtain solid and filtrate;
(5) step (4) being obtained filtrate does to carry out dechromisation in the chromium remover adding waste water.
2. a kind of rapid method for removing chromium in waste water according to claim 1, the sulfide that it is characterized in that described iron are the natural mineral of Iron sulfuret, pyrite, pyrrhotite, sulfurous iron ore, pyrite concentrate or one or more mixtures in the synthetic agent.
3. a kind of rapid method for removing chromium in waste water according to claim 1 is characterized in that the solid that described step (4) filtration obtains, and returns step (1).
4. a kind of rapid method for removing chromium in waste water according to claim 1, described step (4) is filtered the sulfide that adds iron in the filtrate that obtains, and airtight, lucifuge is preserved stand-by under the pH=4-5 condition.
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| CN2008101465335A CN101348298B (en) | 2008-09-02 | 2008-09-02 | Rapid method for removing chromium in waste water |
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| CN2008101465335A CN101348298B (en) | 2008-09-02 | 2008-09-02 | Rapid method for removing chromium in waste water |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500325A (en) * | 2011-10-31 | 2012-06-20 | 青岛理工大学 | Preparation method of adsorbing material used for hexavalent chromium waste water treatment |
| WO2012122708A1 (en) * | 2011-03-16 | 2012-09-20 | Rhodia (China) Co., Ltd. | Method for biological treatment of sewage |
| CN105906105A (en) * | 2016-06-13 | 2016-08-31 | 深圳市绿恩环保技术有限公司 | Processing method of COD measurement wastewater |
| CN107723726A (en) * | 2017-09-19 | 2018-02-23 | 江西赣锋锂业股份有限公司 | A kind of solution of ferrous chloride is except the method for chromium and zinc |
| CN114804412A (en) * | 2022-04-15 | 2022-07-29 | 桂林电子科技大学 | Treatment process of mixed waste liquid of water quality online monitoring equipment |
| CN115869915A (en) * | 2021-09-29 | 2023-03-31 | 广州大学 | Phosphoric acid functionalized sodium alginate composite material and preparation and application thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104384C (en) * | 1999-07-01 | 2003-04-02 | 鲁安怀 | Control method of waste water containing chromium |
| GB0402395D0 (en) * | 2004-02-03 | 2004-03-10 | Rhodia Cons Spec Ltd | Synergistic biocidal compositions |
| CN1321086C (en) * | 2005-07-23 | 2007-06-13 | 桂林矿产地质研究院 | Modified bentonite chromium remover and its manufacturing method |
| CN101186369B (en) * | 2007-12-11 | 2011-06-15 | 南京师范大学 | Magnetite powder composite flocculant for purifying chromium-containing industrial waste water and preparation method |
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2008
- 2008-09-02 CN CN2008101465335A patent/CN101348298B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012122708A1 (en) * | 2011-03-16 | 2012-09-20 | Rhodia (China) Co., Ltd. | Method for biological treatment of sewage |
| CN103648988A (en) * | 2011-03-16 | 2014-03-19 | 索尔维投资有限公司 | Method for biological treatment of sewage |
| CN103648988B (en) * | 2011-03-16 | 2016-01-20 | 索尔维投资有限公司 | For the method for biological sewage treatment |
| CN102500325A (en) * | 2011-10-31 | 2012-06-20 | 青岛理工大学 | Preparation method of adsorbing material used for hexavalent chromium waste water treatment |
| CN105906105A (en) * | 2016-06-13 | 2016-08-31 | 深圳市绿恩环保技术有限公司 | Processing method of COD measurement wastewater |
| CN107723726A (en) * | 2017-09-19 | 2018-02-23 | 江西赣锋锂业股份有限公司 | A kind of solution of ferrous chloride is except the method for chromium and zinc |
| CN115869915A (en) * | 2021-09-29 | 2023-03-31 | 广州大学 | Phosphoric acid functionalized sodium alginate composite material and preparation and application thereof |
| CN115869915B (en) * | 2021-09-29 | 2024-03-29 | 广州大学 | Phosphoric acid functionalized sodium alginate composite material and preparation and application thereof |
| CN114804412A (en) * | 2022-04-15 | 2022-07-29 | 桂林电子科技大学 | Treatment process of mixed waste liquid of water quality online monitoring equipment |
| CN114804412B (en) * | 2022-04-15 | 2023-11-10 | 桂林电子科技大学 | Treatment process of mixed waste liquid of water quality on-line monitoring equipment |
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