CN104016509A - Treatment method of nickel-containing wastewater - Google Patents
Treatment method of nickel-containing wastewater Download PDFInfo
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- CN104016509A CN104016509A CN201410190516.7A CN201410190516A CN104016509A CN 104016509 A CN104016509 A CN 104016509A CN 201410190516 A CN201410190516 A CN 201410190516A CN 104016509 A CN104016509 A CN 104016509A
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Abstract
The invention relates to a treatment method of nickel-containing wastewater. The method comprises the following steps: (1) firstly, adding CaO to adjust the pH value of the wastewater to 8.0; (2) then adding BaCl2 and stirring so as to break complex nickel by combining CaO and BaCl2; (3) adding sodium hydroxide to adjust the pH value of the wastewater to 10.2; (4) finally, adding 2.5ppm negative ions, stirring for 30 minutes, precipitating for 30 minutes, filtering and measuring the nickel content of filtered water. The method provided by the invention has the beneficial effects that the method is low in cost, few in use amount, better in treatment effect to nickel in various shapes in a water body, simple to operate, free from secondary pollution and free from toxic gases, and particularly better in treatment effect to complex nickel with the nickel removal rate reaching up to 99.9%.
Description
Technical field
The present invention relates to wastewater processing technology, relate in particular to a kind for the treatment of process of nickel-containing waste water.
Background technology
Nickel in waste water mainly exists with divalent ion, such as single nickel salt, nickelous nitrate and with many inorganic and nickel salts that organic complex generates.The industrial source of nickel-containing waste water is a lot, is mainly wherein Electroplating Operations, in addition, and the industry such as mining, metallurgy, petrochemical complex, weaving, and also contain nickel in the waste water of the industry discharge such as Steel Plant, printing.
Nickel is also the hard and corrosion resistant heavy metal of a germplasm, is usually used in electroplating industry.Electroplating industry produces a large amount of nickel-containing waste waters, can cause severe contamination to environment; In nickel-plating rinsing waste water, contain a large amount of single nickel salts and nickelous chloride, the compound of nickel can stimulate smart ammonia enzyme, the carboxylase of human body, causes various inflammation, injury cardiac muscle and liver.Meanwhile, nickel or a kind of carcinogenic substance, therefore, explore a kind of effective and economic nickel-containing waste water treatment process significant to environment protection.
In the medicament of existing processing nickel-containing waste water, generally to use the most conventional sodium sulphite to join in nickeliferous waste water, make the nickel in waste water be reduced precipitation, make to remove in this way the nickel in waste water, consumption is large, also likely make water body darken, cause secondary pollution, can produce gas odorous, to the essentially no treatment effect of the nickel waste water of complex state, except nickel rate is low, cost performance is low.Thereby, need to effectively innovate prior art.
Summary of the invention
For above defect, the invention provides a kind of with low cost, consumption is few, to the nickel of various forms in water body have preferred process effect, simple to operate, non-secondary pollution, without toxic gas produce, except the treatment process of the high nickel-containing waste water of nickel rate, to solve many deficiencies of existing wastewater processing technology.
For achieving the above object, the present invention is by the following technical solutions:
A treatment process for nickel-containing waste water, the steps include:
(1) first, first add CaO and regulate waste water ph to 8.0;
(2) add again BaCl
2stir, thereby by CaO and BaCl
2nickel is closed in associating contact break;
(3) add sodium hydroxide again to regulate waste water ph to 10.2;
(4) last, add the negatively charged ion of 2.5ppm to stir 30 minutes, precipitate 30 minutes, filter, survey the nickel content of water after filtering.
Described negatively charged ion value selects can be any one numerical value between 0.5-5ppm;
For step (3), add sodium hydroxide again to regulate waste water ph to any one numerical value between 9.5-10.5;
For step (1), the CaO first adding regulates waste water ph to be at least 8.0.
The beneficial effect of the treatment process of nickel-containing waste water of the present invention is: regulate wastewater pH to 8.0 left and right by first adding CaO, adding BaCl2 stirs again, close nickel with CaO and BaCl2 associating contact break, add again NaOH and regulate wastewater pH to 9.5-10.5, finally adding negatively charged ion fully stirs, sedimentation and filtration, the method is with low cost, consumption is few, the nickel of various forms in water body is had preferred process effect, simple to operate, non-secondary pollution, produced without toxic gas, especially to the nickel of complex state have preferred process effect, except nickel rate is up to 99.9%.
Embodiment
embodiment 1
The treatment process of the nickel-containing waste water described in the embodiment of the present invention, is mainly made up of following steps:
(1) first, first add CaO and regulate waste water ph to 8.1;
(2) add again BaCl
2stir, thereby by CaO and BaCl
2nickel is closed in associating contact break;
(3) add sodium hydroxide again to regulate waste water ph to 10.2;
(4) last, add the negatively charged ion of 2.5ppm to stir 30 minutes, precipitate 30 minutes, filter, survey the nickel content of water after filtering.
embodiment 2
Mainly formed by following steps:
(1) first, first add CaO and regulate waste water ph to 8.0;
(2) add again BaCl
2stir, thereby by CaO and BaCl
2nickel is closed in associating contact break;
(3) add sodium hydroxide again to regulate waste water ph to 9.5;
(4) last, add the negatively charged ion of 3ppm to stir 30 minutes, precipitate 30 minutes, filter, survey the nickel content of water after filtering.
embodiment 3
Mainly formed by following steps:
(1) first, first add CaO and regulate waste water ph to 8.0;
(2) add again BaCl
2stir, thereby by CaO and BaCl
2nickel is closed in associating contact break;
(3) add sodium hydroxide again to regulate waste water ph to 10.5;
(4) last, add the negatively charged ion of 5ppm to stir 30 minutes, precipitate 30 minutes, filter, survey the nickel content of water after filtering.
embodiment 4
Mainly formed by following steps:
(1) first, first add CaO and regulate waste water ph to 8.1;
(2) add again BaCl
2stir, thereby by CaO and BaCl
2nickel is closed in associating contact break;
(3) add sodium hydroxide again to regulate waste water ph to 9.0;
(4) last, add the negatively charged ion of 0.5ppm to stir 30 minutes, precipitate 30 minutes, filter, survey the nickel content of water after filtering.
embodiment 5
Mainly formed by following steps:
(1) first, first add CaO and regulate waste water ph to 8.0;
(2) add again BaCl
2stir, thereby by CaO and BaCl
2nickel is closed in associating contact break;
(3) add sodium hydroxide again to regulate waste water ph to 10.0;
(4) last, add the negatively charged ion of 1.5ppm to stir 30 minutes, precipitate 30 minutes, filter, survey the nickel content of water after filtering.
Above embodiment is more preferably embodiment several of the present invention, and the common variation that those skilled in the art carry out within the scope of the technical program and replacing should be included in protection scope of the present invention.
Claims (4)
1. a treatment process for nickel-containing waste water, is characterized in that, the steps include:
(1) first, first add CaO and regulate waste water ph to 8.0;
(2) add again BaCl
2stir, thereby by CaO and BaCl
2nickel is closed in associating contact break;
(3) add sodium hydroxide again to regulate waste water ph to 10.2;
(4) last, add the negatively charged ion of 2.5ppm to stir 30 minutes, precipitate 30 minutes, filter, survey the nickel content of water after filtering.
2. the treatment process of nickel-containing waste water according to claim 1, is characterized in that: described negatively charged ion value selects can be any one numerical value between 0.5-5ppm.
3. the treatment process of nickel-containing waste water according to claim 1, is characterized in that: for step (3), institute adds sodium hydroxide again to regulate waste water ph to any one numerical value between 9.5-10.5.
4. the treatment process of nickel-containing waste water according to claim 1, is characterized in that: for step (1), the CaO first adding regulates waste water ph to be at least 8.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410190516.7A CN104016509A (en) | 2014-05-08 | 2014-05-08 | Treatment method of nickel-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410190516.7A CN104016509A (en) | 2014-05-08 | 2014-05-08 | Treatment method of nickel-containing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104016509A true CN104016509A (en) | 2014-09-03 |
Family
ID=51433569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410190516.7A Pending CN104016509A (en) | 2014-05-08 | 2014-05-08 | Treatment method of nickel-containing wastewater |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773867A (en) * | 2015-03-26 | 2015-07-15 | 赣州中联环保科技开发有限公司 | Treatment method and treatment system of nickel-containing wastewater |
| CN105906098A (en) * | 2016-06-01 | 2016-08-31 | 湖南大学 | Treatment method for nickel complex containing industrial wastewater |
| CN106587455A (en) * | 2017-02-23 | 2017-04-26 | 重庆中农环保建设股份有限公司 | Chemical nickel-plating waste liquor treatment method and system |
| CN108569723A (en) * | 2017-03-07 | 2018-09-25 | 湖南大学 | One kind being concisely and efficiently nickel-containing waste water pretreatment unit and technique |
-
2014
- 2014-05-08 CN CN201410190516.7A patent/CN104016509A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773867A (en) * | 2015-03-26 | 2015-07-15 | 赣州中联环保科技开发有限公司 | Treatment method and treatment system of nickel-containing wastewater |
| CN105906098A (en) * | 2016-06-01 | 2016-08-31 | 湖南大学 | Treatment method for nickel complex containing industrial wastewater |
| CN105906098B (en) * | 2016-06-01 | 2019-04-02 | 湖南大学 | A method of processing industrial wastewater containing nickel complex |
| CN106587455A (en) * | 2017-02-23 | 2017-04-26 | 重庆中农环保建设股份有限公司 | Chemical nickel-plating waste liquor treatment method and system |
| CN108569723A (en) * | 2017-03-07 | 2018-09-25 | 湖南大学 | One kind being concisely and efficiently nickel-containing waste water pretreatment unit and technique |
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| C06 | Publication | ||
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Application publication date: 20140903 |