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Device and method for in-situ treatment of natural water pollution

An in-situ treatment and water pollution technology, applied in the field of natural water pollution treatment, can solve the problems of reducing the metal ion loading and adsorption efficiency, the phosphorus adsorption efficiency needs to be further improved, and the ability to load metal ions is not strong, and achieves a good treatment effect. , the effect of low governance cost and high use value

Inactive Publication Date: 2020-10-23
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biochar has good adsorption efficiency for various pollutants, but the adsorption efficiency for phosphorus needs to be further improved
At the same time, in order to improve the adsorption efficiency of biochar to phosphorus, the new technology currently used is high-temperature pyrolysis after adding aluminum or iron salts to the raw materials of biochar. Although this technology improves the adsorption efficiency of biochar to a certain extent (especially is the adsorption efficiency of phosphorus), but the microporous structure of the biomass material before carbonization is limited, and the ability to support metal ions is not strong; at the same time, in order to improve the adsorption capacity of biochar, acid or alkali activation is generally performed, and the existing technology prepares After the biochar is activated by acid or alkali, some of the loaded metal ions will undergo reactions such as replacement, precipitation, and desorption to separate from the biochar, thereby reducing the metal ion loading and adsorption efficiency.

Method used

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  • Device and method for in-situ treatment of natural water pollution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A device for in-situ treatment of natural water pollution, including a pendant for laying in the natural water body, a number of mesh bags are hung on the pendant, and modified biochar is installed in the mesh bag, wherein the modified biochar is made of biochar Prepared after acid treatment, alkali treatment and metal salt modification.

[0035] In the present embodiment, the preparation method of the modified biochar that adopts comprises the following steps:

[0036] (1) Preparation of biochar:

[0037] Corn stalks were heated to 300° C. for 2 hours to be pyrolyzed under anoxic conditions, and then crushed into particles with a particle size of 2.0 mm to 5.0 mm to obtain biochar.

[0038] (2) Carry out acid treatment and alkali treatment to biochar:

[0039] (2.1) Wash the biochar prepared in step (1) with 1.0 mol / L hydrochloric acid solution for 2 hours.

[0040] (2.2) Wash the biochar obtained in step (2.1) with water for 20 minutes.

[0041] (2.3) Wash the bio...

Embodiment 2

[0054] A method for in-situ treatment of natural water pollution, utilizing the device in Example 1 to carry out in-situ treatment of river water pollution, comprising the following steps:

[0055] Open the mesh pendant in the device of Example 1 to form a surface, arrange it in the river along the direction of parallel water flow, and fix it, wherein the length of the net pendant is 320m, and the distance between the net pendant is 2.0m, complete In situ remediation of natural water bodies.

[0056] In this embodiment, the mesh hangers are arranged in the river along the direction parallel to the water flow, and the same or similar technical effect can be achieved when the distance between the mesh hangers is 1.0m-4.0m.

[0057] In this embodiment, the length of the mesh pendant should be up to the downstream water quality standard.

[0058] In this embodiment, the number of mesh pendants should meet the downstream water quality standards.

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Abstract

The invention discloses a device and a method for in-situ treatment of natural water body pollution. The device comprises a hanging piece arranged in a natural water body, wherein a plurality of meshbags are hung on the hanging piece, the mesh bags are filled with modified charcoal, and the modified charcoal is prepared by acid treatment, alkali treatment and metal salt modification of charcoal.The device for in-situ treatment of natural water pollution can effectively improve the water quality of natural water, has the advantages of good treatment effect and low treatment cost, and has veryhigh use value and very good application prospect. When the device is used for in-situ treatment of natural water body pollution, various pollutants (such as nitrogen, phosphorus and heavy metals) inthe water body can be effectively removed, and the device has the advantages of simple process, convenience in operation, low cost, good treatment effect and the like, and has very important significance for effective treatment of natural water body pollution.

Description

technical field [0001] The invention belongs to the field of natural water body pollution control, and relates to a device and method for in-situ control of natural water body pollution. Background technique [0002] With the rapid development of my country's economy, the problem of eutrophication of surface water bodies (natural water bodies) such as rivers, lakes and reservoirs is becoming more and more serious. The main nutrient elements that cause eutrophication of water bodies are nitrogen and phosphorus, so the key to controlling eutrophication of water bodies is to control nitrogen and phosphorus. Commonly used nitrogen and phosphorus removal methods include biological methods, chemical methods and adsorption methods. The removal efficiency of biological method is low, the mechanism is complicated, and the process is not easy to control; although the removal rate of chemical method is high, it needs to add chemical reagents, which is costly and may cause secondary po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/20B01J20/30C02F101/20C02F101/10C02F101/16C02F101/30C02F101/38
CPCB01J20/20B01J2220/4825B01J2220/4887C02F1/283C02F2101/105C02F2101/16C02F2101/20C02F2101/30C02F2101/38C02F2103/007C02F2209/16C02F2209/18
Inventor 武海鹏肖莎孙士权周璐余关龙张华刚
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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