Water body heavy metal removal technique

A technology for heavy metals and water bodies, applied in the field of water treatment, can solve the problems of high preparation cost and limited application, and achieve the effects of good effect, environmentally friendly and renewable raw materials, and improved efficiency.

Inactive Publication Date: 2017-02-01
北京理工水环境科学研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used adsorbents are mainly various carbon materials, such as activated carbon, carbon fiber, carbon nanotubes, graphene, etc. The preparation cost of these materials is relatively high, which limits their application in wastewater treatment to a certain extent.

Method used

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  • Water body heavy metal removal technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A water heavy metal removal process, comprising the following steps:

[0029] A. Put the water body containing heavy metals into the reaction vessel, add chitosan, sodium alginate and aluminum hydroxide at a stirring speed of 120rpm; stir for 28min;

[0030] B. The solution is successively precipitated through the inclined tube sedimentation tank, and the bottom of the inclined tube is filled with fine sand;

[0031] C. Enter the flocculant into the static tube mixer, and the water in the static tube mixer is fully mixed with the flocculant;

[0032] D. The water mixed with flocculant enters No. 1 filter;

[0033] E. The effluent from No. 1 filter enters the storage tank, and its heavy metal content is tested. If the heavy metal content meets the drainage requirements, it will flow directly into the clear water tank; if the heavy metal content does not meet the drainage requirements, the water will pass through the static water again. Tubular mixer and add flocculant,...

Embodiment 2

[0045] A water heavy metal removal process, comprising the following steps:

[0046] A. Put the water body containing heavy metals into the reaction vessel, add chitosan, sodium alginate and aluminum hydroxide at a stirring speed of 120rpm; stir for 30min;

[0047] B. The solution is successively precipitated through the inclined tube sedimentation tank, and the bottom of the inclined tube is filled with fine sand;

[0048] C. Enter the flocculant into the static tube mixer, and the water in the static tube mixer is fully mixed with the flocculant;

[0049] D. The water mixed with flocculant enters No. 1 filter;

[0050] E. The effluent from No. 1 filter enters the storage tank, and its heavy metal content is tested. If the heavy metal content meets the drainage requirements, it will flow directly into the clear water tank; if the heavy metal content does not meet the drainage requirements, the water will pass through the static water again. Tubular mixer and add flocculant,...

Embodiment 3

[0062] A water heavy metal removal process, comprising the following steps:

[0063] A. Put the water body containing heavy metals into the reaction vessel, add chitosan, sodium alginate and aluminum hydroxide at a stirring speed of 120rpm; stir for 25-30min;

[0064] B. The solution is successively precipitated through the inclined tube sedimentation tank, and the bottom of the inclined tube is filled with fine sand;

[0065] C. Enter the flocculant into the static tube mixer, and the water in the static tube mixer is fully mixed with the flocculant;

[0066] D. The water mixed with flocculant enters No. 1 filter;

[0067] E. The effluent from No. 1 filter enters the storage tank, and its heavy metal content is tested. If the heavy metal content meets the drainage requirements, it will flow directly into the clear water tank; if the heavy metal content does not meet the drainage requirements, the water will pass through the static water again. Tubular mixer and add floccula...

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Abstract

The invention provides a water body heavy metal removal technique. The fine sand precipitation+activated carbon+activated carbon three-stage filtration mode is adopted for filtration, so the technique has the advantages of high filtration efficiency and favorable effect. Compared with the traditional method, the technique has the advantages of energy saving and consumption reduction. By adopting the modified bagasse activated carbon, the raw material is environment-friendly and renewable, thereby changing wastes into valuable substances and being low in cost. The heavy-metal-attached fine sand can remove heavy metals from the natural water circulation when being used in the arbor planting substrate.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a process for removing heavy metals from water. Background technique [0002] With the rapid development of my country's industry, the ensuing environmental pollution problem has become increasingly prominent. Since heavy metals can only be converted and migrated but not degraded, the environmental pollution problem is particularly prominent. At present, the removal methods of heavy metal ions mainly include: physical method, chemical method and biological method, each of which has advantages and disadvantages. The chemical method is a traditional and practical heavy metal pollution treatment technology. By adding a precipitant to the water body, the heavy metal is precipitated and removed. This method has low treatment cost and convenient management, but it is easy to cause secondary pollution because of the need to add chemicals. The biological method has strong adaptability, ...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F1/28C02F101/20
CPCC02F1/52C02F1/283C02F1/5245C02F1/5272C02F1/56C02F2001/007C02F2101/20
Inventor 章亦兵杨长有
Owner 北京理工水环境科学研究院有限公司
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