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Efficient mercury-containing wastewater treatment method

A treatment method and wastewater technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult post-treatment, high cost, complicated operation, etc.

Inactive Publication Date: 2017-07-21
付主枝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Methods include chemical precipitation, ion exchange, and membrane separation processes to treat mercury-containing wastewater. Most of them are expensive, or the operation is complicated, and post-treatment is not easy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An efficient treatment method for mercury-containing wastewater, comprising the following steps:

[0033] (1) Add o-phenylenediamine to distilled water, and then sonicate until the solid dissolves to obtain solution A, wherein the concentration of o-phenylenediamine is 0.5mM; add cysteine ​​to distilled water, and sonicate until solid Dissolving to prepare solution B, wherein the concentration of cysteine ​​is 0.5mM;

[0034] (2) Add solution B dropwise to solution A with a syringe, stir while adding dropwise, then add ammonium persulfate solution, and stir for 20s to obtain a mixed solution;

[0035] (3) Transfer the mixed solution to a reaction kettle, and react at 160° C. for 12 hours; after the reaction, naturally cool to room temperature, and centrifuge the product at 5000 rpm, and store the supernatant for future use;

[0036] (4) Mix chitosan and acetic acid solution, stir until the solid dissolves to obtain a chitosan solution, add polyethylene glycol to the ch...

Embodiment 2

[0042] An efficient treatment method for mercury-containing wastewater, comprising the following steps:

[0043](1) Add m-phenylenediamine to distilled water, and then sonicate until the solid dissolves to obtain solution A, wherein the concentration of m-phenylenediamine is 50 mM; add cysteine ​​to distilled water, and sonicate until the solid dissolves , to prepare solution B, wherein the concentration of cysteine ​​is 50mM;

[0044] (2) Add solution B dropwise to solution A with a syringe, stir while adding dropwise, then add ammonium persulfate solution, stir for 40s to obtain a mixed solution;

[0045] (3) Transfer the mixed solution to a reaction kettle, and react at 200°C for 72 hours; after the reaction, naturally cool to room temperature, and centrifuge the product at 8000rpm, and store the supernatant for later use;

[0046] (4) Mix chitosan and acetic acid solution, stir until the solid dissolves to obtain a chitosan solution, add polyethylene glycol to the chitosa...

Embodiment 3

[0052] An efficient treatment method for mercury-containing wastewater, comprising the following steps:

[0053] (1) Add p-phenylenediamine to distilled water, and then sonicate until the solid dissolves to obtain solution A, wherein the concentration of p-phenylenediamine is 10 mM; add cysteine ​​to distilled water, and sonicate until the solid dissolves , prepare solution B, wherein the concentration of cysteine ​​is 10mM;

[0054] (2) Add solution B dropwise to solution A with a syringe, stir while adding dropwise, then add ammonium persulfate solution, and stir for 20s to obtain a mixed solution;

[0055] (3) Transfer the mixed solution to a reaction kettle, and react at 170° C. for 20 hours; after the reaction, naturally cool to room temperature, and centrifuge the product at 6000 rpm, and store the supernatant for future use;

[0056] (4) Mix chitosan and acetic acid solution, stir until the solid dissolves to obtain a chitosan solution, add polyethylene glycol to the c...

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Abstract

The invention discloses an efficient mercury-containing wastewater treatment method. The method comprises the following steps: preparing a polymer quantum dot from an amino source monomer and a sulfydryl-containing monomer under the existence of an initiator; adding polyethylene glycol into an acetic acid solution of chitosan to prepare a porous chitosan sol, wherein more carboxyl groups are contained on the surface of the sol; and finally blending an active sludge, the porous chitosan sol and the polymer quantum dot, and adding triethylamine, glyoxal and ferroferric oxide to obtain a composite adsorbent. When the mercury-containing wastewater is treated, part of the mercury ion in the water is removed through a metal powder reduction method, then the wastewater is treated by the composite adsorbent, the method effectively removes the mercury ion in the wastewater, and the removal of the mercury ion is also detected.

Description

[0001] Technical field: [0002] The invention relates to the field of mercury ion wastewater treatment, in particular to an efficient treatment method for mercury-containing wastewater. [0003] Background technique: [0004] The burning of coal, oil and other fuels by human beings, as well as other industrial waste water such as metal smelting, PVC and electrical industry, all discharge a large amount of mercury into the atmosphere and water environment. The amount of mercury discharged into the environment globally is about 44,000-75,000 tons per year. These Once mercury enters the environment or ecosystem, it persists, transfers, and accumulates, eventually causing damage to soil, animal, and human health. Methods include chemical precipitation, ion exchange, and membrane separation processes to treat mercury-containing wastewater. Most of them are expensive, or the operation is complicated, and post-treatment is not easy. At present, the adsorption method is mostly used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/24C02F1/288C02F2101/20
Inventor 付主枝
Owner 付主枝
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