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Method for removing lead, copper and zinc pollution from water sources through coagulation

A water source water and water source technology, applied in the direction of water pollutants, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc., can solve the problems of increasing the complexity of operation and high cost of chemicals, and achieve various preparation methods, Inexpensive and easy to handle

Inactive Publication Date: 2011-09-07
CHENGDU DUCHENG ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of using potassium permanganate and powdered activated carbon and their combination to strengthen coagulation to remove trace heavy metals needs to add a variety of chemicals, the cost of chemicals is high, and the complexity of operation is increased.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take a class I drinking water source water, add a certain amount of lead ions to make an experimental water sample, COD Mn 1.85mg / L, the turbidity is 0.60NTU, the pH value is 7.82, and the lead ion concentration in the water sample is 0.050mg / L. In the experiment, 1.0L of water sample was taken, and 7.27mg / L potassium permanganate and 3.64mg / L sodium thiosulfate were added under rapid stirring. After mixing, reaction, precipitation and sand filtration, the water sample was taken for testing. COD Mn The concentration is 1.20mg / L, the turbidity is 0.01NTU (minimum detection limit of the instrument), and the lead ion concentration is 0.010mg / L, which meets the requirements of the standard GB 5749-2006.

[0023] Take a well-protected class II drinking water source water, add a certain amount of lead ions to make experimental water samples, COD Mn The turbidity is 3.72mg / L, the turbidity is 6.14NTU, the pH value is 7.52, and the lead ion concentration in the water sample i...

Embodiment 2

[0028] Take a class I drinking water source water, add a certain amount of copper ions to make an experimental water sample, COD Mn The copper ion concentration in the water sample was 2.02mg / L. In the experiment, 1.0L of water sample was taken, and 7.27mg / L potassium permanganate and 3.64mg / L sodium thiosulfate were added under rapid stirring. After mixing, reaction, precipitation and sand filtration, the water sample was taken for testing. COD Mn The copper ion concentration is 0.92mg / L, the turbidity is 0.01NTU (minimum detection limit of the instrument), and the copper ion concentration is 0.82mg / L, which meets the requirements of the standard GB 5749-2006.

[0029] Take a well-protected class II drinking water source water, add a certain amount of copper ions to make experimental water samples, COD MnThe copper ion concentration in the water sample was 2.50mg / L. In the experiment, 1.0L of water sample was taken, and 14.54mg / L potassium permanganate and 7.27mg / L sodium ...

Embodiment 3

[0034] Take a class I drinking water source water, add a certain amount of zinc ions to make an experimental water sample, COD Mn The turbidity is 1.85mg / L, the turbidity is 0.60NTU, the pH value is 7.82, and the zinc ion concentration in the water sample is 1.32mg / L. In the experiment, 1.0L of water sample was taken, and 7.27mg / L potassium permanganate and 3.64mg / L sodium thiosulfate were added under rapid stirring. After mixing, reaction, precipitation and sand filtration, the water sample was taken for testing. COD Mn The turbidity is 1.08mg / L, the turbidity is 0.01NTU (minimum detection limit of the instrument), and the zinc ion concentration is 0.35mg / L, meeting the requirements of the standard GB 5749-2006.

[0035] Take a well-protected class II drinking water source water, add a certain amount of zinc ions to make experimental water samples, COD Mn The zinc ion concentration in the water sample was 2.00mg / L. In the experiment, 1.0L of water sample was taken, and 14....

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Abstract

The invention relates to a method for removing lead, copper and zinc pollution from water sources through coagulation, which belongs to the field of environment protection. The method comprises the following steps: adding a certain number of reaction products of potassium permanganate and sodium thiosulfate into water sources to be treated under the condition of sufficient agitation (the potassium permanganate and sodium thiosulfate react in site, and the reaction products are added in site, the adding proportion of the potassium permanganate to the sodium thiosulfate meets the requirement that the mol ratio is 2:1, and the adding amount of the potassium permanganate is in a range between 7.27 and 36.36 mg / L, and the adding amount of the sodium thiosulfate is in a range between 3.64 and 18.19 mg / L according to different water qualities of the water sources to be treated); then, obtaining life drinking water conforming to the life drinking water standard through conventional mixing, reaction, sedimentation and sand filtering. The method for removing lead, copper and zinc pollution from water sources through coagulation has the advantages of good removal effect, simple treatment method, low cost and no secondary pollution, does not change the original treatment process, and has wide applicability.

Description

technical field [0001] The invention belongs to the field of environmental protection, in particular to a water treatment method for coagulating and removing lead, copper and zinc pollution in water source water. Background technique [0002] Heavy metal pollution is one of the most harmful water pollution problems, among which lead, copper, and zinc pollution are common pollutants. Heavy metals enter water bodies through man-made pollution sources such as mining, metal smelting, metal processing and chemical production wastewater, burning of fossil fuels, application of pesticides and fertilizers, and domestic garbage, as well as natural forms such as geological erosion and weathering. It is not easy to be metabolized, easy to be bioaccumulated, and has biomagnification effects. It not only pollutes the water environment, but also seriously threatens the survival of humans and aquatic organisms. [0003] Lead is one of the more toxic heavy metal pollution, and once it ente...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/28C02F1/62C02F101/20
Inventor 李星赵富旺杨艳玲
Owner CHENGDU DUCHENG ENVIRONMENTAL PROTECTION CO LTD
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