Modified fes nanoparticle and its preparation method and application

A nanoparticle and modified technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems such as FeS treatment of Cr that has not yet appeared, and achieve improved storage time and high reactivity. , the effect of large specific surface area
CN104478004BInactive Publication Date: 2016-06-15HUNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUNAN UNIV
Publication Date
2016-06-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a modified FeS nano-particle as well as preparation method and application thereof, wherein the modified FeS nano-particle comprises aFeS nano-particle and cross-linked polyvinylpyrrolidone; the cross-linked polyvinylpyrrolidone wraps on the surface of the FeS nano-particle to form a shell-core structure; the mass ratio of the cross-linked polyvinylpyrrolidone to the FeS nano-particle is (0.1-0.5):1.1. The preparation method of the modified FeS nano-particle c comprises the following step: importing N2 to stir and mix a cross-linked polyvinylpyrrolidone solution and a FeCl2.4H2O solution, dropwise adding an Na2F.9H2O solution under the condition of importing N2 and stirring to obtain the modified FeS nano-particle. The modified FeS nano-particle provided by the invention is high in reaction activity and large in specific surface area; both the Fe2+ and the S2- of the FeS nano-particle have reducing property and can be applied to the treatment of chromate wastewater, so that compared with the present widely applied zero-valent iron nano-particles, the modified FeS nano-particle is better in treatment effect.
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Description

technical field

[0001] The invention relates to the technical field of heavy metal wastewater treatment, in particular to a modified FeS nanoparticle and a preparation method thereof, and also relates to the application of the modified FeS nanoparticle to remove heavy metal chromium in water. Background technique

[0002] Heavy metals are a class of residual and cumulative pollutants. With the development of mining, smelting, electroplating, chemical industry, electronics, leather and other industries, chromium pollutant leakage accidents have increased, civil solid wastes have been piled up and landfilled indiscriminately, and a large number of pesticides, The application of chemical fertilizers causes chromium pollutants to enter water bodies, and the pollution to the environment is becoming more and more serious. Among the types of heavy metal pollution, the prevalence of chromium pollution ranks second, second only to lead. Heavy metal chromium is also one of the priori...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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