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A kind of treatment method of mining heavy metal wastewater

A treatment method and heavy metal technology, which is applied in mining wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of poor heavy metal treatment effect, high cost, and non-environmental treatment methods, and achieve good treatment effects , small amount of addition, easy for industrial production

Active Publication Date: 2020-04-24
福建兴万祥建设集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems in the prior art that the treatment effect of heavy metals in mining wastewater is poor, the treatment method is not environmentally friendly, and the cost is high, the invention provides a treatment method for mining metal wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Acid leaching: Mix 4 parts of waste water with 0.75 parts of hydrochloric acid and 0.25 parts of carbonic acid, heat to 50°C, and filter to obtain filtrate A;

[0057] (2) Add ZSM-8 type molecular sieve in filtrate A, wherein the mass ratio of filtrate A and ZSM-8 type molecular sieve is 50:1, stir 2.5h under the condition that stirring speed is 80r / min, filter to obtain filtrate B;

[0058] (3) Add polyaluminum chloride and polyferric sulfate in filtrate B, wherein the mass ratio of filtrate B to polyaluminum chloride and polyferric sulfate is 3:0.8:0.2, stirring 20min under the condition of 200r / min at stirring speed, Stand still for 1.5h, then add polyacrylamide, the amount of polyacrylamide added is one-fiftieth of that of polyaluminum chloride and polyferric sulfate, stir for 4.5h at a stirring speed of 25r / min, and filter to obtain filtrate C ;

[0059] (4) Add activated carbon to filtrate C, the mass ratio of filtrate C to activated carbon is 50:1, stir for ...

Embodiment 2

[0061] (1) Acid leaching: Mix 3 parts of waste water with 0.8 part of sulfuric acid and 0.2 part of carbonic acid, heat to 60°C, and filter to obtain filtrate A;

[0062] (2) Add ZSM-11 type molecular sieve in filtrate A, wherein the mass ratio of filtrate A and ZSM-8 type molecular sieve is 40:1, stir 2h under the condition that stirring speed is 100r / min, filter to obtain filtrate B;

[0063] (3) Add polyaluminum chloride and polyferric sulfate in filtrate B, wherein filtrate B and polyaluminum chloride and polyferric sulfate mass ratio are 2:0.83:0.17, stir 10min under the condition of 150r / min at stirring speed, Let it stand for 1 hour, then add polyacrylamide, the amount of polyacrylamide added is one-fortieth of polyaluminum chloride and polyferric sulfate, stir for 3 hours at a stirring speed of 20 r / min, and filter to obtain filtrate C;

[0064] (4) Add activated carbon to filtrate C, the mass ratio of filtrate C to activated carbon is 40:1, stir for 30min at a stirrin...

Embodiment 3

[0066] (1) Acid leaching: Mix 5 parts of waste water with 0.6 part of phosphoric acid and 0.4 part of carbonic acid, heat to 45°C, and filter to obtain filtrate A;

[0067] (2) Silicalite-1 type molecular sieve was added in filtrate A, wherein the mass ratio of filtrate A to ZSM-8 type molecular sieve was 60:1, stirred for 3h under the condition of stirring speed of 50r / min, and filtered to obtain filtrate B;

[0068] (3) Add polyaluminum chloride and polyferric sulfate in filtrate B, wherein filtrate B and polyaluminum chloride and polyferric sulfate mass ratio are 4:0.67:0.33, stir 30min under the condition of 300r / min at stirring speed, Let it stand for 2 hours, then add polyacrylamide, the amount of polyacrylamide added is one-sixtieth of polyaluminum chloride and polyferric sulfate, stir for 5 hours at a stirring speed of 50r / min, and filter to obtain filtrate C;

[0069] (4) Add activated carbon to filtrate C, the mass ratio of filtrate C to activated carbon is 60:1, sti...

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Abstract

The invention relates to the field of environmental protection and water treatment, in particular to a method for treating mining heavy metal wastewater. The method comprises the following steps: (1)acid leaching: mixing wastewater with an acid, carrying out heating, and carrying out filtering to obtain a filtrate A; (2) adding a molecular sieve into the filtrate A, carrying out stirring, and carrying out filtering to obtain a filtrate B; (3) adding a coagulant into the filtrate B, carrying out stirring, carrying out standing, then adding a flocculant, carrying out stirring, and carrying outfiltering to obtain a filtrate C; and (4) adding activated carbon into the filtrate C, and carrying out stirring, standing and filtering. The treatment method disclosed by the invention has the advantages that heavy metal ions such as copper, iron, zinc, cadmium, lead and the like in wastewater can be effectively treated, environment friendliness is achieved, cost is saved, industrialization is easy, and the like.

Description

technical field [0001] The invention relates to the field of environmental protection water treatment, in particular to a treatment method for mining heavy metal wastewater. Background technique [0002] Mining heavy metal wastewater mainly refers to wastewater containing slag, rich in heavy metals and heavy metal compounds. It is mainly caused by heavy metal-containing wastewater discharged from mining, electroplating, iron and steel and non-ferrous metallurgy and some chemical enterprises. In addition, domestic sewage, landfill leachate, etc. are also factors of heavy metal pollution in water. The heavy metal wastewater discharged during the mining process, the wastewater generated during the mining of metal mines is mainly suspended solids and heavy metal ions and their compounds, mainly containing copper, chromium, zinc, cadmium and other metal ions. If these wastewater containing high metal ions are discharged into the environment without treatment, it will cause seri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F101/20C02F103/10
CPCC02F1/001C02F1/02C02F1/281C02F1/283C02F1/56C02F1/62C02F9/00C02F2101/20C02F2103/10
Inventor 陈志伟
Owner 福建兴万祥建设集团有限公司
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