Magnetic flocculating agent and method for clearing algal bloom by using same

A flocculant and algal bloom technology, which is applied in the field of algal bloom control in eutrophic water bodies, can solve the problems of small flocs, low salvage efficiency, and weak magnetism of zirconium magnets, and achieve easy operation, stable water quality, and reduced use costs Effect

Inactive Publication Date: 2010-05-26
安徽雷克环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zirconium magnets are weak and require superconducting magnets; fly ash mainly relies on physical adsorption. Due to the weak adsorption bridging and net capture, the formed flocs are small and the salvage efficiency is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A modified attapulgite magnetic flocculant, according to the ratio of 2g attapulgite: 1g iron powder: 1ml concentrated hydrochloric acid (8mol / L), after mixing evenly and fully reacting, the modified attapulgite can be obtained earth. Attapulgite is rich in silica, aluminum oxides, and a small amount of iron, calcium, and manganese oxides. After uniformly mixing attapulgite, iron powder and concentrated hydrochloric acid, some substances in attapulgite react with hydrochloric acid, and the oxides of silicon, aluminum and iron react to form silicate, aluminum salt and iron salt, which have adsorption bridging And the flocculation of net catch.

[0018] Add 200 mg of the above-mentioned modified attapulgite magnetic flocculant to 1L algae-containing solution, through the adsorption bridging and net capture of the modified attapulgite, flocculate to form a micro-nano network structure, and in water and algae Colloidal particles such as cells, nitrogen, and phosphorus com...

Embodiment 2

[0022] A modified attapulgite magnetic flocculant, according to the ratio of 0.5g attapulgite: 0.5g iron powder: 0.5ml concentrated hydrochloric acid (6mol / L), after mixing evenly and fully reacting, the modified Sexual attapulgite. Attapulgite is rich in silica, aluminum oxides, and a small amount of iron, calcium, and manganese oxides. After uniformly mixing attapulgite, iron powder and concentrated hydrochloric acid, some substances in attapulgite react with hydrochloric acid, and the oxides of silicon, aluminum and iron react to form silicate, aluminum salt and iron salt, which have adsorption bridging And the flocculation of net catch.

[0023] Add 100mg of the modified attapulgite magnetic flocculant prepared above to 1L algae-containing solution, through the adsorption bridging and net capture of the modified attapulgite, flocculate to form a micro-nano network structure, and in water and algae Colloidal particles such as cells, nitrogen, and phosphorus combine to for...

Embodiment 3

[0027] A modified attapulgite magnetic flocculant, according to the ratio of 3g attapulgite: 2g iron powder: 2ml concentrated hydrochloric acid (10mol / L), after mixing evenly and fully reacting, the modified attapulgite can be obtained earth. Attapulgite is rich in silica, aluminum oxides, and a small amount of iron, calcium, and manganese oxides. After uniformly mixing attapulgite, iron powder and concentrated hydrochloric acid, some substances in attapulgite react with hydrochloric acid, and the oxides of silicon, aluminum and iron react to form silicate, aluminum salt and iron salt, which have adsorption bridging And the flocculation of net catch.

[0028] Add 400 mg of the above-mentioned modified attapulgite magnetic flocculant to 1L algae-containing solution, through the adsorption bridging and net capture of the modified attapulgite, flocculate to form a micro-nano network structure, and in water and algae Colloidal particles such as cells, nitrogen, and phosphorus co...

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Abstract

The invention relates to a magnetic flocculating agent of modified attapulgite, which is prepared by mixing the modified attapulgite with functions of adsorption-bridging and net-capturing. The invention also provides a method for clearing algal bloom by using the magnetic flocculating agent of the modified attapulgite, which comprises the following steps: putting the magnetic flocculating agent of the modified attapulgite into algae containing solution; forming a micro-nano network by using the modified attapulgite with the functions of adsorption-bridging and net-capturing; combining the micro-nano network with the colloidal particles such as algae cells, nitrogen, phosphorus and the like in water; and moving flocout out of the water by utilizing an external magnetic field. The method has simple preparation process, and simple and convenient operation. By utilizing the magnetic flocculating agent, hazardous substances in the water can be adsorbed and net-captured fast so as to improve water transparency, and maintain stable water quality and acid base balance. Under the action of the external magnetic field, the algae cells can be enriched fast, which solves the problem of refloatation after removing the algae and puts an end to the possibility of secondary pollution. In the invention, the flocculating agent can be recovered and reused so that the cost is reduced remarkably.

Description

technical field [0001] The invention relates to a magnetic trapping flocculant for controlling algal blooms in eutrophic water bodies such as rivers and lakes, and a method for controlling algal blooms in eutrophic water bodies by using the magnetic trapping flocculant. Background technique [0002] In recent years, against the backdrop of sustained and rapid economic growth, profound changes have taken place in ecological and environmental issues. The eutrophication of lakes is becoming more and more prominent, algae blooms are breaking out, fish and shrimps have basically disappeared, the color and smell of water bodies have deteriorated to varying degrees, and some lakes have even become sewage receiving bodies. [0003] Large-scale algal blooms have seriously damaged the balance and stability of the aquatic ecosystem, not only affecting the water landscape and the development of aquaculture, but also algal toxicity has become a threat to the human living environment. On...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52B03C1/00
Inventor 叶瑞刘兵杜海明吴敬东王兆连
Owner 安徽雷克环境科技有限公司
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