Processing method for organic complexed nickel wastewater

A treatment method and organic complexing technology, which are applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effects of low cost, high nickel removal rate and low dosage

Inactive Publication Date: 2014-12-31
SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology can be used for removing harmful metals from wastewater without causing any negative side-effects such as chemical reactions or bacterial growth that could cause environmental concerns. It uses iron (II) oxalate with hydroxylamine solution added through different steps like mixing them together, heating, cooling, filtering, etc., resulting in lower costs compared to traditional methods while also improving efficiency over existing technologies.

Problems solved by technology

This patented technical problem addressed in this patents relates to finding an effective solution for reducing harmful levels of nickle contaminants (NiC), particularly when dealing with complicated types of materials like cathode ray tubes used in electronic devices.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The treatment method that contains organic complex nickel waste water described in the embodiment of the present invention mainly is made up of following steps:

[0020] (1) First, add H 2 SO 4 Adjust the pH value of wastewater to 2.5-3.5;

[0021] (2) Then add ferrous ion and hydrogen peroxide and stir, the mass ratio of ferrous ion and hydrogen peroxide is 0.2;

[0022] (3) Then, add Ca(OH) 2 Adjust the pH value of wastewater to 9.5-10.5;

[0023] (4) Then add 50ppm polyaluminum chloride and stir for 5 minutes;

[0024] (5) Finally, add 2.5ppm of anion and stir for 18 minutes, and precipitate for 18 minutes;

[0025] ⑹Filter, measure the nickel content of filtered water, the removal rate of nickel content reaches 95.8%.

Embodiment 2

[0027] The treatment method that contains organic complex nickel waste water described in the embodiment of the present invention mainly is made up of following steps:

[0028] (1) First, add H 2 SO 4 Adjust the pH value of wastewater to 2.5-3.5;

[0029] (2) Then add ferrous ion and hydrogen peroxide and stir, the mass ratio of ferrous ion and hydrogen peroxide is 0.2;

[0030] (3) Then, add Ca(OH) 2 Adjust the pH value of wastewater to 9.5-10.5;

[0031] (4) Then add 200ppm polyaluminum chloride and stir for 5 minutes;

[0032] (5) Finally, add 2.5ppm of anion and stir for 18 minutes, and precipitate for 18 minutes;

[0033] ⑹Filter, measure the nickel content of filtered water, the removal rate of nickel content reaches 99.8%.

Embodiment 3

[0035] The treatment method that contains organic complex nickel waste water described in the embodiment of the present invention mainly is made up of following steps:

[0036] (1) First, add H 2 SO 4 Adjust the pH value of wastewater to 2.5-3.5;

[0037] (2) Then add ferrous ion and hydrogen peroxide and stir, the mass ratio of ferrous ion and hydrogen peroxide is 0.2;

[0038] (3) Then, add Ca(OH) 2 Adjust the pH value of wastewater to 9.5-10.5;

[0039] (4) Add 500ppm polyaluminum chloride and stir for 5 minutes;

[0040] (5) Finally, add 2.5ppm of anion and stir for 18 minutes, and precipitate for 18 minutes;

[0041] ⑹Filter, measure the nickel content of filtered water, the removal rate of nickel content reaches 99.8%.

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Abstract

A related processing method for organic complexed nickel wastewater comprises the following steps: (1) adding H2SO4 to adjust the pH value of wastewater to 2.5-3.5; (2) adding a ferrous ion and hydrogen peroxide and stirring, wherein the mass ratio of ferrous ion to hydrogen peroxide is 0.2; (3) adding Ca(OH)2 to adjust the pH value of wastewater to 9.5-10.5; (4) adding 50-500 ppm of polyaluminum chloride and stirring for 5 min; (5) adding 0.5-5 ppm of anions, stirring for 18 min, and precipitating for 18 min; and (6) filtering, and measuring the nickel content of filtered water. The beneficial effects comprise that the method is low in cost, less in reagent usage, free of secondary pollution, free of generation of odorous gases, relatively excellent in removing effect on nickel in various states in water body, and high in nickel-removing cost performance, and has the nickel removal rate up to 99.8%.

Description

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Claims

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Application Information

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Owner SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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