Magnetic microsphere capable of absorbing cadmium ions and complexes thereof, as well as preparation method, application method and regeneration method of magnetic microsphere

A technology of magnetic microspheres and complexes, which is applied in separation methods, filter regeneration, alkali metal compounds, etc., can solve the problem that the adsorption capacity of cadmium ions is difficult to meet the expected requirements, and the regeneration cycle capacity of ferric tetroxide magnetic adsorption materials is poor. Cumbersome operation and other problems, to achieve the effect of rich carboxyl group content, beneficial adsorption efficiency, and simplified preparation process
CN105536741AActive Publication Date: 2016-05-04国网湖南环保有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
国网湖南环保有限公司
Publication Date
2016-05-04

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Abstract

The invention discloses a magnetic microsphere capable of absorbing cadmium ions and complexes thereof. The surface of a ferroferric oxide / polyacrylic acid composite material is grafted with 4-phenyl-3-thiosemicarbazide, and the ferroferric oxide / polyacrylic acid composite material is of a composite structure which utilizes magnetic nano ferroferric oxide particles as a core and has polyacrylic acid wrapping the surface of the core. The preparation method comprises the following steps: firstly preparing the ferroferric oxide / polyacrylic acid composite material, then performing activating treatment on the ferroferric oxide / polyacrylic acid composite material, and finally grafting 4-phenyl-3-thiosemicarbazide on the surface of the ferroferric oxide / polyacrylic acid composite material, thereby obtaining the magnetic microsphere. The magnetic microsphere disclosed by the invention is capable of effectively absorbing cadmium ions and complexes thereof in industrial wastewater, achieves a removal rate greater than or equal to 95%, and has a cadmium adsorption amount greater than or equal to 175.2mg / g. According to the preparation method, the ferroferric oxide / polyacrylic acid composite material is synthesized by one step, so that the preparation process is simplified.
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Description

technical field

[0001] The invention relates to the field of modified adsorption materials, in particular to a magnetic microsphere used for the adsorption of cadmium ions and their complexes in industrial waste water and a preparation method, application and regeneration method thereof. Background technique

[0002] With the development of industry, heavy metal wastewater, especially cadmium-containing wastewater, has become an important source of environmental pollution. Cadmium-containing wastewater mainly comes from electroplating, mining, pigments, alloys and other industries. Cadmium ions and their complexes entering the ecological environment are easily enriched through the food chain, posing a serious threat to organisms and human health, and even endangering the entire ecosystem. The "cadmium rice incident" in recent years has aroused public panic about cadmium, and everyone "disguises when talking about cadmium". Cadmium in the water directly or indirectly enters ...

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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