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Efficient environment-friendly treatment method for chromium-containing wastewater

A technology for environmental protection and chromium wastewater treatment, applied in water/sewage treatment, reduced water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of biological and human toxicity, achieve strong adsorption performance, and low production cost , The effect of reducing processing costs

Inactive Publication Date: 2017-11-21
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chromium (Vl) compounds are strong oxidants and have toxic effects on organisms and humans

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An efficient and environmentally friendly treatment method for chromium-containing wastewater, including the following steps:

[0026] (1) Mix 1,2-dimethylimidazole hydroxide and solvent, stir and mix uniformly to obtain a 1,2-dimethylimidazole hydroxide solution; among them, 1,2-dimethylimidazole hydroxide and The mass ratio of the solvent is 1:17;

[0027] (2) Mixing and swelling alginic acid and deionized water to prepare an aqueous solution of alginic acid; wherein the mass ratio of alginic acid and deionized water is 1:10;

[0028] (3) Put the above-prepared alginic acid aqueous solution in a reaction kettle, and add 1,2-dimethylimidazole hydroxide solution dropwise to the reaction kettle, stir while dripping, and react after the dropwise addition, and the reaction is complete After centrifugation, the supernatant was taken out and the solvent was removed to obtain 1,2-dimethylimidazole alginate ionic liquid adsorbent; wherein the molar ratio of alginic acid to 1,2-dimet...

Embodiment 2

[0032] An efficient and environmentally friendly treatment method for chromium-containing wastewater, including the following steps:

[0033] (1) Mix 1,2-dimethylimidazole hydroxide and solvent, stir and mix uniformly to obtain a 1,2-dimethylimidazole hydroxide solution; among them, 1,2-dimethylimidazole hydroxide and The mass ratio of the solvent is 1:20;

[0034] (2) Mix and swell alginic acid and deionized water to prepare an aqueous solution of alginic acid; wherein the mass ratio of alginic acid and deionized water is 1:12;

[0035] (3) Put the above-prepared alginic acid aqueous solution in a reaction kettle, and add 1,2-dimethylimidazole hydroxide solution dropwise to the reaction kettle, stir while dripping, and react after the dropwise addition, and the reaction is complete After centrifugation, the supernatant was taken out and the solvent was removed to obtain 1,2-dimethylimidazole alginate ionic liquid adsorbent; wherein the molar ratio of alginic acid to 1,2-dimethylimi...

Embodiment 3

[0039] An efficient and environmentally friendly treatment method for chromium-containing wastewater, including the following steps:

[0040] (1) Mix 1,2-dimethylimidazole hydroxide and solvent, stir and mix uniformly to obtain a 1,2-dimethylimidazole hydroxide solution; among them, 1,2-dimethylimidazole hydroxide and The mass ratio of the solvent is 1:23;

[0041] (2) Mix and swell alginic acid and deionized water to prepare an aqueous solution of alginic acid; wherein the mass ratio of alginic acid and deionized water is 1:14;

[0042] (3) Put the above-prepared alginic acid aqueous solution in a reaction kettle, and add 1,2-dimethylimidazole hydroxide solution dropwise to the reaction kettle, stir while dripping, and react after the dropwise addition, and the reaction is complete After centrifugation, the supernatant was taken out and the solvent was removed to obtain 1,2-dimethylimidazole alginate ionic liquid adsorbent; wherein the molar ratio of alginic acid to 1,2-dimethylimi...

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PUM

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Abstract

The invention discloses a high-efficiency and environment-friendly treatment method for chromium-containing wastewater, which comprises the following steps: firstly, imidazolium hydroxide and newly prepared alginic acid are mixed in a solvent according to a certain ratio, stirred evenly, and the supernatant is taken out by centrifugation after the reaction solution, remove the solvent to obtain the imidazolium alginate ionic liquid adsorbent; add reducing agent to the chromium-containing wastewater, stir for 20-70min under the state of 3000-5000 rpm, let stand for precipitation for 1-3h, and remove the supernatant The liquid is pumped into the adsorption treatment tank; the imidazolium alginate ionic liquid adsorbent prepared above is added to the chromium-containing wastewater in the adsorption treatment tank, stirred and adsorbed for 1-2 hours at 800 rpm, and then centrifuged , the separated supernatant reaches the discharge standard. The method disclosed by the invention can effectively remove heavy metal ions in waste water, has no secondary pollution to water bodies, and is safe and environment-friendly.

Description

Technical field: [0001] The invention relates to the field of heavy metal wastewater treatment, in particular to an efficient and environmentally friendly treatment method of chromium-containing wastewater. Background technique: [0002] Chromium and its compounds are widely used in various fields of industrial production. It is an indispensable raw material for the metallurgical industry, metal processing, electroplating, tanning, paint, pigments, printing and dyeing, pharmacy, photographic plate making and other industries. These industrial sectors have many and wide distribution points, and discharge large amounts of chromium-containing wastewater every day. According to incomplete statistics from the State Environmental Protection Administration, at the end of 2002, the national industrial discharge of chromium-containing wastewater was nearly 9.32 million cubic meters, of which the discharge of hexavalent chromium reached 699 tons. [0003] Chromium (Vl) compounds are strong ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/22
CPCC02F9/00C02F1/285C02F1/38C02F1/70C02F2101/22
Inventor 陈东进
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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