CN103043827B - Method for removing niobium from sewage - Google Patents
Method for removing niobium from sewage Download PDFInfo
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- CN103043827B CN103043827B CN201210595472.7A CN201210595472A CN103043827B CN 103043827 B CN103043827 B CN 103043827B CN 201210595472 A CN201210595472 A CN 201210595472A CN 103043827 B CN103043827 B CN 103043827B
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Abstract
The invention discloses a method for processing sewage containing niobium. The method comprises the steps that (1) flocculation precipitation is conducted on waste water containing niobium with polyaluminium chloride and polyacrylamide; (2) 8-10mg/L sodium sulfide solution and 10-15mg/L sodium phosphate solution are sequentially added to the precipitated waste water; pH is adjusted to 3.0-6.5; sufficient stirring is conducted at 100-450r/min to allow the reaction to be complete; (3) the waste water is precipitated for 15-20min in a precipitation tank, and then mud and water are separated; (4) effluent is lifted by a pump to an absorption tower, with a water flow mode of upward flow; and (5) the effluent waste water is the sewage with niobium completely removed, and the effluent is lower than a national Grade I emission standard. The method has the advantages that the method is conducted at a room temperature and is noise-free; used chemical agents are nontoxic, harmless and non-volatile; no new 'three wastes' are generated in a treatment process; heavy metal can be recycled; the raw materials are easy to obtain; the cost is lower; the niobium removal efficiency can reach above 99.9%.
Description
Technical field
The present invention relates to a kind for the treatment of process containing niobium sewage, in the industry waste water such as particularly plating, automobile and aviation, pigment, paint, printing, the removal of niobium, belongs to field of waste water treatment in environment protection.
Background technology
In recent years, niobium has a wide range of applications in industries such as plating, automobile and aviation, pigment, paint, printings, and what factory discharged is the primary pollution source that water body niobium pollutes containing niobium waste water.The waste water (niobium content is up to 0.089mg/L) etc. of producing the technique eliminatings such as phosphate fertilizer such as the waste water (the about 0.065mg/L of niobium content) of electroplating industry, war production discharge and sulfuric acid ore extracting sulfuric acid, Rock Phosphate (72Min BPL) is particularly serious to water pollution.Therefore, very urgent containing effective processing of niobium waste water, the research of the processing containing niobium waste water of exploitation efficient economy, has great society, economy and environment meaning.
At present conventional removal has chemical precipitation method, electrolytic process, absorption method, ion exchange method containing the treatment process of niobium waste water.(1) chemical precipitation method is by to first adding sodium sulphite containing in niobium waste water, and niobium is precipitated out, and then adds bodied ferric sulfate, generates iron sulphide and ironic hydroxide, utilizes their cohesion and co-precipitation to arrive the object of removing niobium in waste water.Although have the plurality of advantages such as technique is simple, easy to operate, economical and practical, its precipitation slag is difficult to process, and can cause secondary pollution.(2) electrolytic process is to adopt platinum family oxide compound or PbO
2make anode, to destroy prussiate, then niobium ion flocculated under the condition of pH=11, precipitate, filter and remove niobium, the method energy consumption is large, therefore containing in the processing of niobium waste water, is failing to be widely used.(3) absorption method is to utilize porousness solid matter, makes cadmium in waste water+be adsorbed on solid adsorbent surface and a kind of method of removing.The method, to applied widely containing niobium waste water, can not cause secondary pollution, but sorbent material is not high to the adsorption selectivity of niobium ion.(4) although ion exchange method operating procedure simple, be easy to regeneration, except niobium effective.But this method is limited by the loading capacity of resin, be applicable to process containing the low waste water of niobium concentration, and resin is easy to poisoningly, processing cost is higher.
Therefore for overcoming the deficiencies in the prior art, the invention provides a kind for the treatment of process containing niobium waste water, carry out at normal temperatures, noiselessness, chemical agent used is nontoxic, harmless, non-volatile, and treating processes does not produce new " three wastes ", heavy metal recoverable, medicament stock is easy to get, cost is lower, except niobium efficiency up to 99.99% with first-class advantage.
Summary of the invention
The object of the invention is for overcoming the deficiencies in the prior art, a kind for the treatment of process containing niobium waste water is provided.The inventive method is carried out at normal temperatures, noiselessness, chemical agent used is nontoxic, harmless, non-volatile, and treating processes does not produce new " three wastes ", and emulsion can be recycled, heavy metal recoverable, medicament stock is easy to get, cost is lower, except cadmium efficiency up to 99.99% with first-class advantage, therefore, the inventive method application prospect is very wide.
The technical solution used in the present invention is:
(1) with polymerize aluminum chloride and polyacrylamide, to containing niobium waste water, carry out flocculation sediment;
(2) in the waste water after precipitation, add successively 8～10mg/L sodium sulphite, 10～15mg/L sodium phosphate, be adjusted to pH to 3.0～6.5, with the rotating speed of 100～450r/min, fully stir, make it to react completely;
(3) in settling tank, precipitate after 15～20min mud-water separation;
(4) water outlet rises to adsorption tower with pump, and water flow mode is flow lifting type;
(5) waste water flowing out can be removed the niobium in sewage completely, and water outlet can be lower than national grade one discharge standard.
Filler in described adsorption tower is 80～100 object boiler slags.
Advantage and effect that method of the present invention had are compared with the conventional method:
(1) technical process is simple, medicament stock is easy to get, with low cost, easy to operate;
(2) carry out at normal temperatures, noiselessness, chemical agent used is nontoxic, harmless, non-volatile, and treating processes do not produce new " three wastes ",
(3) heavy metal recoverable;
(4) obvious processing effect, after primary treatment, in water, residual niobium ion concentration is lower than 0.08mg/L, and lower than the first discharge standard of national regulation, clearance is up to more than 99.9%;
Embodiment
The concrete steps of the inventive method are followed successively by:
(1) with polymerize aluminum chloride and polyacrylamide, to containing niobium waste water, carry out flocculation sediment;
(2) in the waste water after precipitation, add successively 8～10mg/L sodium sulphite, 10～15mg/L sodium phosphate, be adjusted to pH to 3.0～6.5, with the rotating speed of 100～450r/min, fully stir, make it to react completely;
(3) in settling tank, precipitate after 15～20min mud-water separation;
(4) water outlet rises to adsorption tower with pump, and water flow mode is flow lifting type;
(5) waste water flowing out can be removed the niobium in sewage completely, and water outlet can be lower than national grade one discharge standard.
Filler in described adsorption tower is 80～100 object boiler slags.
The concrete application method of the present invention is: with polymerize aluminum chloride and polyacrylamide to carrying out flocculation sediment containing niobium waste water, in waste water after precipitation, add successively 8～10mg/L sodium sulphite, 10～15mg/L sodium phosphate, be adjusted to pH to 3.0～6.5, rotating speed with 100～450r/min fully stirs, make it to react completely, in settling tank, precipitate after 15～20min mud-water separation, water outlet rises to adsorption tower with pump, and water flow mode is flow lifting type; The waste water flowing out can be removed the niobium in sewage completely, and water outlet can be lower than national grade one discharge standard.
Example 1
With polymerize aluminum chloride and polyacrylamide to carrying out flocculation sediment containing niobium waste water, in waste water after precipitation, add successively 8mg/L sodium sulphite, 10mg/L sodium phosphate, be adjusted to pH to 3.0, rotating speed with 100r/min fully stirs, make it to react completely, in settling tank, precipitate after 15min mud-water separation, water outlet rises to adsorption tower with pump, and water flow mode is flow lifting type; The waste water flowing out can be removed the niobium in sewage completely, and water outlet niobium concentration has dropped to 0.06mg/L, and niobium clearance has reached 99.99%.
Example 2
With polymerize aluminum chloride and polyacrylamide to carrying out flocculation sediment containing niobium waste water, in waste water after precipitation, add successively 10mg/L sodium sulphite, 15mg/L sodium phosphate, be adjusted to pH to 6.5, rotating speed with 450r/min fully stirs, make it to react completely, in settling tank, precipitate after 20min, mud-water separation, water outlet rises to adsorption tower with pump, water flow mode is flow lifting type, the waste water flowing out can be removed the niobium in sewage completely, and water outlet niobium concentration has dropped to 0.05mg/L, and niobium clearance has reached 99.98%.
Example 3
With polymerize aluminum chloride and polyacrylamide to carrying out flocculation sediment containing niobium waste water, in waste water after precipitation, add successively 9mg/L sodium sulphite, 13mg/L sodium phosphate, be adjusted to pH to 5.0, rotating speed with 300r/min fully stirs, make it to react completely, in settling tank, precipitate after 18min, mud-water separation, water outlet rises to adsorption tower with pump, water flow mode is flow lifting type, the waste water flowing out can be removed the niobium in sewage completely, and water outlet niobium concentration has dropped to 0.02mg/L, and niobium clearance has reached 99.98%.
Claims (2)
1. remove the method for niobium in sewage for one kind, it is characterized in that: with polymerize aluminum chloride and polyacrylamide to carrying out flocculation sediment containing niobium waste water, in waste water after precipitation, add successively 8～10mg/L sodium sulphite, 10～15mg/L sodium phosphate, be adjusted to pH to 3.0～6.5, fully stir, make it to react completely, after precipitating in settling tank, mud-water separation, water outlet rises to adsorption tower with pump, water flow mode is flow lifting type, and the waste water of outflow can be removed the niobium in sewage completely.
2. a kind of method of removing niobium in sewage according to claim 1, is characterized in that: the filler in described adsorption tower is 80～100 object boiler slags.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210595472.7A CN103043827B (en) | 2012-12-07 | 2012-12-07 | Method for removing niobium from sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210595472.7A CN103043827B (en) | 2012-12-07 | 2012-12-07 | Method for removing niobium from sewage |
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| Publication Number | Publication Date |
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| CN103043827A CN103043827A (en) | 2013-04-17 |
| CN103043827B true CN103043827B (en) | 2014-05-07 |
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| CN201210595472.7A Expired - Fee Related CN103043827B (en) | 2012-12-07 | 2012-12-07 | Method for removing niobium from sewage |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111018038A (en) * | 2019-12-26 | 2020-04-17 | 浙江伊诺环保科技股份有限公司 | Heavy metal trapping agent and preparation process thereof |
| CN112811658B (en) * | 2020-12-29 | 2023-04-07 | 江西挺进环保科技股份有限公司 | Electroplating sewage treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5976383A (en) * | 1991-04-08 | 1999-11-02 | Romar Technologies, Inc. | Recycle process for removing dissolved heavy metals from water with aluminum particles |
| CN101088938A (en) * | 2007-06-29 | 2007-12-19 | 东莞东运机械制造有限公司 | Process of treating heavy metal containing sewage |
| CN102642991A (en) * | 2012-04-28 | 2012-08-22 | 南京大学 | Efficient combination advanced treatment method for electroplating wastewater |
| CN102786171A (en) * | 2012-08-28 | 2012-11-21 | 山东同大镍网有限公司 | Comprehensive treatment process and device for electroplating wastewater containing heavy metal ions, Cr6+, Cu2+ and Ni2+ |
-
2012
- 2012-12-07 CN CN201210595472.7A patent/CN103043827B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5976383A (en) * | 1991-04-08 | 1999-11-02 | Romar Technologies, Inc. | Recycle process for removing dissolved heavy metals from water with aluminum particles |
| CN101088938A (en) * | 2007-06-29 | 2007-12-19 | 东莞东运机械制造有限公司 | Process of treating heavy metal containing sewage |
| CN102642991A (en) * | 2012-04-28 | 2012-08-22 | 南京大学 | Efficient combination advanced treatment method for electroplating wastewater |
| CN102786171A (en) * | 2012-08-28 | 2012-11-21 | 山东同大镍网有限公司 | Comprehensive treatment process and device for electroplating wastewater containing heavy metal ions, Cr6+, Cu2+ and Ni2+ |
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