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Composite type magnetic trap flocculant and method for removing algaltufa by using flocculant

A flocculant and composite technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, magnetic separation, etc., can solve the problem of low calcium oxide content in fly ash, weak magnetism of zirconium magnets, and large amount of fly ash and other problems, to achieve the effects of simple preparation process, reduced use cost and easy operation

Inactive Publication Date: 2010-02-10
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 in magnetism and require superconducting magnets; fly ash has low calcium oxide content, smooth surface, poor self-coagulation effect, and the amount of fly ash is particularly large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A composite magnetic flocculant is prepared according to the ratio of 4g slag:1g iron powder:1ml concentrated hydrochloric acid (8mol / L), mixed uniformly and stirred, and fully reacted to obtain modified iron-containing slag. The organic polymer PDMDAAC (polydimethyldiallylammonium chloride) solution with bridging adsorption effect and the modified slag are formulated into a composite magnetic flocculant at a ratio of 0.15mg / L:40mg / L . The slag is rich in silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide and a small amount of iron, which can be magnetized and has a strong self-setting effect. After the slag, iron powder and concentrated hydrochloric acid are uniformly mixed, part of the substances in the slag react with hydrochloric acid. Alumina and iron react to form aluminum salt and iron salt, and part of the iron powder also forms iron salt. Aluminum salt and iron salt have strong properties. The flocculation of PDMDAAC forms a micro-nano network with...

Embodiment 2

[0023] A composite magnetic flocculant is prepared according to the ratio of 3g slag: 0.5g iron powder: 0.5ml concentrated hydrochloric acid (6mol / L), mixed and stirred uniformly, and fully reacted to obtain modified iron-containing slag. The organic polymer PDMDAAC (polydimethyldiallylammonium chloride) solution with bridging adsorption effect and the modified slag are formulated into a composite magnetic flocculant at a ratio of 0.05mg / L: 30mg / L . The slag is rich in silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide and a small amount of iron, which can be magnetized and has a strong self-setting effect. After the slag, iron powder and concentrated hydrochloric acid are uniformly mixed, part of the substances in the slag react with hydrochloric acid. Alumina and iron react to form aluminum salt and iron salt, and part of the iron powder also forms iron salt. Aluminum salt and iron salt have strong properties. The flocculation of PDMDAAC forms a micro-nano netwo...

Embodiment 3

[0028] A composite magnetic flocculant is prepared according to the ratio of 6g slag:2.5g iron powder:2.5ml concentrated hydrochloric acid (12mol / L), mixed and stirred uniformly, and fully reacted to obtain modified iron-containing slag. The organic polymer PDMDAAC (polydimethyldiallylammonium chloride) solution with bridging adsorption effect and modified slag are formulated into a composite magnetic flocculant at a ratio of 0.25mg / L:50mg / L . The slag is rich in silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide and a small amount of iron, which can be magnetized and has a strong self-setting effect. After the slag, iron powder and concentrated hydrochloric acid are uniformly mixed, part of the substances in the slag react with hydrochloric acid. Alumina and iron react to form aluminum salt and iron salt, and part of the iron powder also forms iron salt. Aluminum salt and iron salt have strong properties. The flocculation of PDMDAAC forms a micro-nano network wit...

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Abstract

The invention relates to a composite type magnetic trap flocculant which is obtained by mixing modified iron-containing slag with organic polymer PDMDAAC solution having bridging absorption function.The invention also provides a method for clearing algaltufa by using flocculant, in which the composite type magnetic trap flocculant is thrown into an algae-containing solution, a micronano mesh structure formed by PDMDAAC and modified slag strong self-flocculation performance are utilized to combine with algae cells, nitrogen, phosphorus and other colloidal particles in water to form floccules,and then external magnetic field rotation is utilized to remove the floccules out of water. The method is simple in preparation technique and convenient in operation. The invention can be used for fast absorbing and inmeshing harmful substances in water, can improve water transparency, maintain water quality to be stable and balance acid and base. The invention can fast gather algae cells under the action of external magnetic field, thus solving the problem of salvage after removing algaltufa, and eradicating possible occurrence of secondary pollution. In the invention, the flocculant can be recycled, and the application cost is remarkably reduced.

Description

Technical field [0001] The invention relates to a method for treating algae blooms in eutrophic water bodies such as rivers and lakes, in particular to a method for treating algae blooms in eutrophic water bodies by using a composite magnetic flocculant. Background technique [0002] In recent years, in the context of sustained and rapid economic growth, profound changes have taken place in ecological and environmental issues. The eutrophication of lakes has become increasingly prominent, water blooms have broken 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 bodies. [0003] Large-scale blooms have severely disrupted the balance and stability of aquatic ecosystems, not only affecting the water landscape and the development of aquaculture, but also the toxicity of algae has posed a threat to the human living environment. The red tide alone causes economic losses to t...

Claims

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Application Information

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IPC IPC(8): C02F1/52B03C1/00
Inventor 叶瑞张发宇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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