Method for synthesizing absorption of Co<2+> resin by taking carboxymethyl potato starch as raw materials

Abstract

The invention discloses a method for synthesizing absorption Co<2+> resin by adopting a one-pot method through taking carboxymethyl potato starch as raw materials and oxidizing with hydrogen peroxide. The method is mainly characterized in that the absorption Co<2+> resin is synthesized by adopting the one-pot method through oxidizing the carboxymethyl potato starch with the hydrogen peroxide, requiring no separation, washing and purification, and performing water-bath heating on crylic acid for removing a polymerization inhibitor and sodium salt thereof under the protection of nitrogen; the absorption capacity of a product with the best condition for Co<2+> with a concentration of 5 ppm is 38.12 mg / g; the absorption capacity for Co<2+> with a concentration of 50 ppm is 240.56 mg / g. The method disclosed by the invention has the advantages that in the oxidization of the carboxymethyl potato starch with the hydrogen peroxide, traditional carboxymethyl potato starch does not need to be subjected to separation, purification and washing, the polymerization can be realized without additionally adding an initiator, and the prepared product has larger absorbing capacity for the Co<2+> with low concentration and high concentration; therefore, the absorption Co<2+> resin synthesized by the method disclosed by the invention is simple in process, low in cost and easier for large-scale production; as the absorbing capacity for the Co<2+> is higher, the product has a good application prospect in aspects of Co<2+>-contained sewage treatment, soil remediation and the like.

Description

technical field [0001] The invention discloses a novel adsorption Co 2+ Resin and preparation method thereof, be specifically related to be used for containing Co 2+ Sewage treatment, soil and river pollution control, etc., belong to the field of environmental functional materials. Background technique [0002] The process of industrialization and urbanization is getting faster and faster. Industrial sewage, mining wastewater, and urban sewage are discharged directly to the environment without effective treatment, resulting in heavy metal pollution in water areas. At the same time, as these waters are used for irrigation, they also pollute a lot of water. Cultivated land. At present, the treatment methods for heavy metal ions nationwide mainly include neutralization precipitation, sulfide precipitation, chemical reduction, electrochemical reduction, ion exchange, and biological treatment. However, the neutralization precipitation method is not effective for the removal o...

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Problems solved by technology

[0002] The process of industrialization and urbanization is getting faster and faster. Industrial sewage, mining wastewater, and urban sewage are discharged directly to the environment without effective treatment, resulting in heavy metal pollution in water areas. At the same time, as these waters are used for irrigation, they also pollute a lot of water. Cultivated land. At present, the treatment methods for heavy metal ions nationwide mainly include neutralization precipitation, sulfide precipitation, chemical reduction, electrochemical reduction, ion exchange, and biological treatment. However, the neutralization precipitation method is not effective for the removal of low-concentration heavy metal ions, and the sulfide precipitation will produce H 2 For secondary pollutants such as S, the cost of electrochemical removal is high, the investment of ion exchange method is large, the area is large, and the treatment period of biological treatment technology is too long, etc.

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