Method for synthesizing Hg <2+> adsorption resin from carboxymethyl potato starch as raw material

Abstract

The invention discloses a method for synthesizing Hg <2+> adsorption resin from carboxymethyl potato starch as a raw material with a one-pot process through hydrogen peroxide oxidation. The method is mainly characterized by comprising steps as follows: the carboxymethyl potato starch is oxidized with hydrogen peroxide, and then the oxidized carboxymethyl potato starch, acrylic acid with a polymerization inhibitor removed and acrylic acid sodium salt are used for synthesizing the Hg <2+> adsorption resin with the one-pot process through water-bath heating under the protection of nitrogen without separation, washing and purification, the adsorption capacity of a product synthesized under the optimal condition to Hg <2+> with concentration being 1 ppb is 4.96 mu g / g, and the removal rate is as high as 99.7%. The method has the advantages that oxidation of the carboxymethyl potato starch with hydrogen peroxide does not require separation, purification and washing for traditional oxidization of the carboxymethyl potato starch, polymerization can be performed without addition of an initiator, and the product has higher adsorption capacity and quite high removal rate to Hg <2+>. Therefore, the technology for synthesizing the Hg <2+> adsorption resin is simple, the cost is low, and large-scale production is easier. The product has quite high adsorption capacity to Hg <2+>, thereby having quite good application prospect in treatment of Hg <2+>-containing sewage, remediation of Hg <2+>-containing soil and the like.

Description

technical field [0001] The invention discloses a novel adsorption Hg 2+ Resin and preparation method thereof, specifically relate to for containing Hg 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 of low-concentr...

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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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