CN85102296A - The purifying method of waste water containing arsenic - Google Patents
The purifying method of waste water containing arsenic Download PDFInfo
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- CN85102296A CN85102296A CN85102296.0A CN85102296A CN85102296A CN 85102296 A CN85102296 A CN 85102296A CN 85102296 A CN85102296 A CN 85102296A CN 85102296 A CN85102296 A CN 85102296A
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- arsenic
- waste water
- purifying method
- molysite
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Abstract
A kind of method of simple and effective purification waste water containing arsenic.In arsenic-containing waste water, add the molysite that is equivalent to arsenic amount certain multiple, under stirring condition, be adjusted to pH8.0-9.0 with ammoniacal liquor and add an amount of paper pulp again, continue to stir certain hour, elimination precipitates, and can reach the purpose of arsenic removal.Add because molysite calculates according to the arsenic amount, can avoid stirring after blindly excessive molysite is given and bring difficulty.Simultaneously, the adding of paper pulp can reduce the cohesion of ironic hydroxide self, helps the absorption to arsenic.Paper pulp also will produce favorable influence to the filtration of ironic hydroxide.
Description
The invention belongs to the chemical separation and the purification of waste water containing arsenic.
The purification of waste water containing arsenic is done a lot both at home and abroad.Ferrite process (" Environmental Pollution and Control ", 1,15(1983)) and iron powder method (" water channel technology, 3,28(1977)) all have effect of removing arsenic preferably.In the United States Patent (USP) (4,201,667(1980) and russian patent (38969(1977)), also see the purifying method that arsenic-containing waste water is arranged.Russian patent and the present invention are more approaching on principle.This patent is that arsenic is oxidized to high price again by the ironic hydroxide co-precipitation at a low price with the preparation waste material (containing oxyhydroxide such as chromium 05-5% and iron) that dichromate produced.In order finally to remove arsenic, also need to add molysite and milk of lime and carry out primary sedimentation again in the filtrate after handling for the first time.
Purpose of the present invention is to propose a purifying method easy and simple to handle, that cost of equipment is low and suitability is wider aspect the processing of arsenic-containing waste water.
Content of the present invention:
Earlier pending industrial arsenic-containing waste water is analyzed, is measured the wherein content of arsenic, again by table 1 to the final requirement of data and arsenic removal, and according to the total amount of arsenic-containing waste water, by certain iron arsenic than the molysite that adds calculated amount.Behind arsenic thorough mixing in molysite and the water, transfer to slight alkalinity with ammoniacal liquor again, the ironic hydroxide that makes firm generation all carries out physics chemical action with on every side arsenic compound immediately, at last arsenic is adsorbed in the precipitation, adding paper pulp had both helped keeping the active surface of ironic hydroxide, and sedimentary filterability is improved.
The invention process illustration:
Get 1 liter of arsenic-containing waste water, measure the wherein content of arsenic (for example being 50ppmAs) earlier, be 30: 1 by iron arsenic ratio again, adding is equivalent to the Indian red of 15 gram Fe or the solution of ferric sulphate, stirs 5 minutes, with 1: 4 ammoniacal liquor solution is transferred to pH8-9, add the wet pulp that is equivalent to 0.5 gram dry pulp again, continue to stir 10 minutes, left standstill 10 minutes through the water logging bubble, filter, the arsenic of this moment about 99.9% is transferred in the precipitation.To containing the lower trade effluent of arsenic, in order to improve effect of removing arsenic, the churning time that can suitably increase iron arsenic ratio and prolong post precipitation.
The present invention compares with the purification method of existing arsenic-containing waste water, has the following advantages:
1. do not increase process after hardness of water, and the method for United States Patent (USP) and Russian Patent will obviously increase process after the content of calcium and other heavy metals in the water.
Processing time shorter, Russian Patent needs through twice or repeatedly precipitates and filter and arsenic in the water could be down to the desired concn scope, our method only needs single treatment.
3. the filterability of gained precipitation is better, and when adopting the iron hydroxide arsenic removal, gained colloidal precipitation is all more sad filters generally. After we add paper pulp, the precipitation filterability is improved.
In order to realize the present invention better, can with reference to table 2 operate to condition, general all obtain good result.
* calculate by 40 premium on currency
Claims (4)
1, a kind of purifying method of waste water containing arsenic is characterized in that measuring earlier the content of arsenic in the waste water, than the add-on with the control molysite, regulates pH value according to rational iron arsenic, to form ironic hydroxide, with paper pulp as Fe (OH)
3The protective material of active surface.
2,, it is characterized in that to different arsenic contents or purification rate its iron arsenic ratio can freely be selected in the scope at 10: 1 to 60: 1 as the described purifying method of claim 1.
3, as the described purifying method of claim 1, it is characterized in that regulating pH value with ammoniacal liquor is 8.0-9.0) to form the stronger Fe(OH of adsorptive power
3
4, as the described purifying method of claim 1, it is characterized in that adding 0.5 the gram dry pulp/liter, with the protection Fe(OH)
3Active surface and the sedimentary filterability of improvement to As absorption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102296 CN1012729B (en) | 1985-04-01 | 1985-04-01 | Method for purification of waste water containing arsenic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102296 CN1012729B (en) | 1985-04-01 | 1985-04-01 | Method for purification of waste water containing arsenic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85102296A true CN85102296A (en) | 1986-09-17 |
| CN1012729B CN1012729B (en) | 1991-06-05 |
Family
ID=4792406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85102296 Expired CN1012729B (en) | 1985-04-01 | 1985-04-01 | Method for purification of waste water containing arsenic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1012729B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005033184A1 (en) * | 2003-09-16 | 2005-04-14 | H2O Technologies, L.L.C. | Manufacturing method of lignocellulose media coupled with fe or al |
| CN101486506B (en) * | 2008-01-18 | 2011-04-06 | 中国科学院沈阳应用生态研究所 | Arsenic removing apparatus for drinking water |
| CN102351294A (en) * | 2011-07-14 | 2012-02-15 | 中国科学院沈阳应用生态研究所 | Method for treating arsenic in waste water |
| CN102471107A (en) * | 2010-04-28 | 2012-05-23 | 三菱重工业株式会社 | Wastewater treatment method |
-
1985
- 1985-04-01 CN CN 85102296 patent/CN1012729B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005033184A1 (en) * | 2003-09-16 | 2005-04-14 | H2O Technologies, L.L.C. | Manufacturing method of lignocellulose media coupled with fe or al |
| CN101486506B (en) * | 2008-01-18 | 2011-04-06 | 中国科学院沈阳应用生态研究所 | Arsenic removing apparatus for drinking water |
| CN102471107A (en) * | 2010-04-28 | 2012-05-23 | 三菱重工业株式会社 | Wastewater treatment method |
| CN102351294A (en) * | 2011-07-14 | 2012-02-15 | 中国科学院沈阳应用生态研究所 | Method for treating arsenic in waste water |
| CN102351294B (en) * | 2011-07-14 | 2014-01-08 | 中国科学院沈阳应用生态研究所 | Method for treating arsenic in waste water |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1012729B (en) | 1991-06-05 |
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