Remediation method for heavy metal contaminated surface water

A remediation method and technology for surface water, applied in the direction of water pollutants, non-metal elements, alkali metal compounds, etc., can solve the problems of inability to meet environmental protection requirements, high costs, large manpower, etc., to avoid secondary pollution problems, ensure Safe water quality, regeneration and reuse

Active Publication Date: 2020-04-24
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The following problems exist in the method of chemical dosing: ①A large amount of heavy metals chemically react with the chemical, and settle to the bottom of the river to become sediment, which is likely to cause serious secondary pollution; ②Excessive dosing of chemical agents is expensive
The use of phytoremediation has the following problems: ①The repair process is relatively long, the effect is slow, and the disposal of plants after absorbing heavy metals is likely to cause serious secondary pollution; ②Plant maintenance is complicated and requires a lot of manpower
Therefore, the use of surface water heavy metal pollution remediation technology can no longer meet the increasingly stringent environmental protection requirements, and it is urgent to develop new surface water heavy metal pollution remediation technology to ensure the water quality of surface water bodies.

Method used

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  • Remediation method for heavy metal contaminated surface water

Examples

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Effect test

Embodiment 1

[0033] A kind of restoration method of heavy metal polluted surface water, described restoration method comprises the following steps:

[0034] Step 1. The heavy metal-contaminated surface water passes through the pipeline filter and enters the magnetic adsorber for heavy metal adsorption. The initial dosage of the magnetic adsorbent is 400mg / L, and the adsorption time is 30min. Among them, the magnetic adsorbent is prepared by the following method:

[0035] 1) After the purchased porous ceramic particles are crushed and sieved, the 30-100 mesh part is soaked in a 0.3mol / L manganese sulfate solution that is three times the volume of the porous ceramic particles and soaked for 1 hour to prepare manganese-loaded porous ceramic particles;

[0036] 2) Soak the manganese-loaded porous ceramic particles in a 0.1mol / L cerous nitrate solution that is 3 times the volume of the manganese-loaded porous ceramic particles for 1 hour to prepare manganese-cerium-loaded porous ceramic particle...

Embodiment 2

[0047] A kind of restoration method of heavy metal polluted surface water, described restoration method comprises the following steps:

[0048] Step 1. The heavy metal-contaminated surface water passes through the pipeline filter and enters the magnetic adsorber for heavy metal adsorption. The initial dosage of the magnetic adsorbent is 200mg / L, and the adsorption time is 60min. Among them, the magnetic adsorbent is prepared by the following method:

[0049] 1) After the purchased porous ceramic particles are crushed and sieved, the 30-100 mesh part is put into a 0.6mol / L manganese sulfate solution having a volume 5 times the volume of the porous ceramic particles and soaked for 2 hours to prepare manganese-loaded porous ceramic particles;

[0050] 2) soaking the manganese-loaded porous ceramic particles in a 0.2 mol / L cerous nitrate solution that is 5 times the volume of the manganese-loaded porous ceramic particles for 2 hours to prepare manganese-cerium-loaded porous ceramic...

Embodiment 3

[0061] A kind of restoration method of heavy metal polluted surface water, described restoration method comprises the following steps:

[0062] Step 1. The heavy metal-contaminated surface water passes through the pipeline filter and enters the magnetic adsorber for heavy metal adsorption. The initial dosage of the magnetic adsorbent is 300mg / L, and the adsorption time is 50min. Among them, the magnetic adsorbent is prepared by the following method:

[0063] 1) After the purchased porous ceramic particles are crushed and sieved, the 30-100 mesh part is put into a 0.5 mol / L manganese sulfate solution that is 4 times the volume of the porous ceramic particles and soaked for 1.5 hours to prepare manganese-loaded porous ceramic particles;

[0064] 2) soaking the manganese-loaded porous ceramic particles in a 0.15mol / L cerous nitrate solution that is 4 times the volume of the manganese-loaded porous ceramic particles for 1.5 hours to prepare manganese-cerium-loaded porous ceramic pa...

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Abstract

The invention discloses a heavy metal contaminated surface water remediation method which comprises the following steps: heavy metal contaminated surface water is adsorbed by a magnetic adsorbent, themagnetic adsorbent adsorbing heavy metal and purified surface water are subjected to magnetic separation, the magnetic adsorbent is adsorbed on a magnetic plate, and the purified surface water entersa clear water tank; and the magnetic adsorbent on the magnetic plate is repeatedly used after being physically regenerated. The surface water treated by the method reaches the environmental quality standard of surface water, the adsorbent can be recycled, and the treatment cost is low; the adsorption efficiency is high, and the water treatment amount is large; bottom mud containing heavy metal pollution is not generated, and secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of sewage and wastewater treatment. Specifically, the invention relates to a surface water heavy metal pollution restoration technology, which is used for the treatment and restoration of heavy metal-polluted surface water bodies and emergency treatment of surface water heavy metal pollution events, and is especially suitable for mercury and cadmium. , lead, arsenic, thallium, copper, zinc, nickel and antimony and other heavy metals polluted surface water remediation and treatment. Background technique [0002] At present, in the treatment and restoration of heavy metal-contaminated surface water bodies, the main methods used are chemical dosing and phytoremediation. In the emergency treatment of surface water heavy metal pollution incidents, the main method used is chemical dosing. The following problems exist in the method of chemical dosing: ①A large amount of heavy metals chemically react with the chemi...

Claims

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Application Information

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IPC IPC(8): B01J20/16B01J20/28B01J20/30C02F9/12C02F101/20
CPCB01J20/06B01J20/28009B01J20/16C02F9/00C02F1/001C02F1/281C02F1/48C02F2101/20
Inventor邵立南杨晓松陈国强
OwnerBEIJING MINING & METALLURGICAL TECH GRP CO LTD