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Device and method for reducing pollution of lake and reservoir desilting to surrounding water

A water pollution, lake reservoir technology, applied in water pollutants, chemical instruments and methods, polluted waterways/lakes/ponds/rivers treatment, etc., can solve the problem that the ability to load metal ions is not strong, and the phosphorus adsorption efficiency needs to be further improved , reduce metal ion loading and adsorption efficiency and other issues

Pending Publication Date: 2020-10-23
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • 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 reducing pollution of lake and reservoir desilting to surrounding water
  • Device and method for reducing pollution of lake and reservoir desilting to surrounding water
  • Device and method for reducing pollution of lake and reservoir desilting to surrounding water

Examples

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Effect test

Embodiment 1

[0042] Such as figure 1 and 2 As shown, a device for reducing the pollution of surrounding water bodies by dredging of lakes and reservoirs, including a mesh pendant 2 used to surround the water body around the dredging area of ​​lakes and reservoirs; several mesh bags 4 are hung on the mesh pendants 2, and the nets Bag 4 contains modified biochar, wherein the modified biochar is prepared from biochar after acid treatment, alkali treatment and iron-aluminum salt modification.

[0043] In this embodiment, the mesh pendant 2 is arranged in a ring around the water body around the dredging area of ​​the lake reservoir. The number of layers of the mesh pendant 2 is 5 layers, and the distance between them is 3.0m; the mesh pendant 2 is a nylon mesh.

[0044] In the present invention, when the mesh pendant is not in use, the pendant can be tightened for easy storage; when in use, the mesh pendant can be opened to surround the water body around the dredging area of ​​the lake and res...

Embodiment 2

[0074] Such as figure 1 and 3 As shown, a device for reducing the pollution of surrounding water bodies by dredging of lakes and reservoirs, including a mesh pendant 2 used to surround the water body around the dredging area of ​​lakes and reservoirs; several mesh bags 4 are hung on the mesh pendants 2, and the nets Bag 4 contains modified biochar, wherein the modified biochar is prepared from biochar after acid treatment, alkali treatment and iron-aluminum salt modification.

[0075] In this embodiment, the mesh pendant 2 is arranged radially around the water body around the dredging area of ​​the lake reservoir. The distance between the end of the mesh pendant 2 near the dredging place is 2.0m, and the distance between the end far away from the dredging place is 6.0m, the number of columns of the mesh pendant 2 is 100; the mesh pendant 2 is a nylon net.

[0076] In the present invention, when the mesh pendant is not in use, the pendant can be tightened for easy storage; wh...

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Abstract

The invention discloses a device and method for reducing pollution of lake and reservoir desilting to surrounding water. The device comprises a net-shaped hanging piece used for surrounding a water body around a lake and reservoir desilting area, wherein a plurality of net bags are hung on the net-shaped hanging piece, the bags are filled with modified biochar, and the modified biochar is preparedby conducting acid treatment, alkali treatment and metal salt modification on biochar. According to the device, the water quality of water around a lake and reservoir desilting area can be effectively improved, the influence of lake and reservoir desilting on the water quality of a surrounding water body is effectively reduced; the device can be widely applied to in-situ treatment of polluted water in lake and reservoir desilting areas, can realize effective removal of various pollutants (such as nitrogen, phosphorus and organic pollutants) in the water, has the advantages of simple process,convenience in operation, low cost, good treatment effect and the like, and has very important significance for effectively reducing pollution of lake and reservoir desilting to surrounding water.

Description

technical field [0001] The invention belongs to the field of water environment treatment, and relates to a device and a method for reducing the pollution of surrounding water bodies by dredging of lakes and reservoirs. Background technique [0002] With the rapid development of my country's economy, lakes, reservoirs and other water bodies have been polluted and damaged to varying degrees. Water body sediment (also called silt) is mainly derived from sediment, terrestrial animal and plant residues, pollutants, and aquatic animal and plant residues carried by surface runoff, and is formed by precipitation under the joint action of various factors in the water environment. Sediment will not only silt up lakes and reservoirs and reduce the ability of lakes and reservoirs to regulate and store floods, but also release nutrients, heavy metals and organic pollutants into water bodies, becoming endogenous pollution of water bodies and posing a serious threat to water ecological sec...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/20B01J20/30C02F101/20C02F101/10C02F101/16C02F101/30C02F101/38
CPCC02F1/283B01J20/20C02F2103/007B01J2220/4825B01J2220/4887C02F2101/20C02F2209/16C02F2209/18C02F2101/16C02F2101/105C02F2101/38C02F2101/30
Inventor 武海鹏张华刚余关龙杜春艳陈婧屈新宇
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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