Heavy metal precipitating agent

A heavy metal precipitation and weight technology, applied in the field of precipitant, can solve the problems of weak complexation ability, loose floc sedimentation speed, low raw material utilization rate, etc., and achieve the effect of improving precipitation efficiency

Active Publication Date: 2005-04-06
GUANGDONG ZHONGDA ENVIRONMENTAL PROTECTION TECH INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method that overcomes the low utilization rate of raw materials, weak complexation ability, loose flocs and slow precipitation speed of existing heavy metal precipitants, especially for stable complexed heavy metal ion wastewater without special effects Disadvantages of agents, providing a heavy metal precipitant that effectively removes and fixes heavy metal ions

Method used

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  • Heavy metal precipitating agent

Examples

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Effect test

Embodiment 1

[0024] Add 9.5mg BDCP to 50ml containing Cu 2+ 50mg.l -1 In the CuSO4 wastewater, the speed is 85rmin -1 After stirring with the mixer for 5 minutes, a brown precipitate appeared in the wastewater solution. After standing still for 4 hours, the turbidity of the measured solution was 42, and the residual Cu in the solution 2+ The concentration is 0.6mg.l -1 .

Embodiment 2

[0026] 9.5mg BDCP and 0.1mg Al 2 (SO 4 ) 3 Add 50ml containing Cu 2+ 50mg.l -1 In the CuSO4 wastewater, the speed is 85rmin -1 After 5 minutes of stirring with the mixer, a large amount of precipitation appeared in the waste water. After standing still for 30 minutes, the turbidity of the solution measured was 26, and the residual Cu in the solution was 2+ The concentration is 0.1mg.l -1 , which are all lower than the national comprehensive wastewater discharge standards. Place this precipitate in water with a pH of 6 for 60 days, Cu 2+ The cumulative dissolution concentration is only 0.08mg.l -1 .

Embodiment 3

[0028] 11 mg CSM (45% by weight N, N-sodium dithiopiperazine formate, 53% by weight activated carbon powder, 1.0% by weight Al 2 (SO4) 3 and 1.0% by weight MgSO4) add 50ml containing Cu 2+ 50mg.l -1 In the CuSO4 wastewater, the speed is 85rmin -1 After 5 minutes of stirring with the mixer, a large amount of precipitation appeared in the waste water. After standing still for 30 minutes, the turbidity of the solution measured was 16, and the residual Cu in the solution 2+ The concentration is 0.07mg.l -1 , which are all lower than the national comprehensive wastewater discharge standards. Place this precipitate in water with a pH of 6 for 60 days, Cu 2+ The cumulative dissolution concentration is only 0.079mg.l -1 .

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Abstract

The invention discloses a heavy metal precipitator. It conquers the disadvantages of low utilization factor of raw material, and weak complexation ability, incompact wadding and slow speed to deposit existed in the heavy metal precipitator in existing.Especially for the stability complexation heavy metal ion wasting water, it can remove stability heavy metal ion. Moreover, it has decolor function and can be used in the process for heavy metal ion.

Description

technical field [0001] The invention relates to a precipitating agent, especially a heavy metal precipitating agent. Background technique [0002] Heavy metals refer to metals with a specific gravity greater than 4 or 5, about 45 kinds, such as copper, lead, zinc, iron, cobalt, nickel, vanadium, niobium, tantalum, titanium, manganese, cadmium, mercury, tungsten, molybdenum, gold, silver Wait. The pollution of these metals is a long-standing worldwide environmental problem. According to statistics, there are 20,000-50,000 abandoned mines in the United States. These mines produce a large amount of wastewater containing heavy metal ions every year (hereinafter referred to as heavy metal wastewater containing heavy metal ions). They affect the water quality of 23,000 kilometers of rivers in the United States; annual mercury emissions worldwide exceed 3,000 tons. With the rapid development of modern industry, the discharge of heavy metal industrial wastewater is increasing day ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/62
Inventor 熊亚陈润铭付丰连
Owner GUANGDONG ZHONGDA ENVIRONMENTAL PROTECTION TECH INVESTMENT
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