Method for synthesizing Cr3<+> absorption resin by taking carboxymethyl potato starch as raw material

Abstract

The invention discloses a carboxymethyl potato starch as raw material, which is oxidized by hydrogen peroxide and adopts a one-pot method to synthesize and adsorb Cr 3+ The method of resin, its main feature is that hydrogen peroxide oxidizes carboxymethyl potato starch, without separation, washing, purification, with acrylic acid and its sodium salt to remove the polymerization inhibitor, under the protection of nitrogen, a pot of synthetic adsorption Cr 3+ Resin, the product synthesized under optimal conditions has a concentration of 5ppmCr 3+ The adsorption capacity is 23.95mg / g, for a concentration of 55ppmCr 3+ The adsorption capacity is 245.9mg / g, for Cr with a concentration of 5‑55ppm 3+ The removal rate is 89.07%-94.86%; the advantage of the present invention is that hydrogen peroxide oxidizes carboxymethyl potato starch without separation, purification, and washing of traditional oxidized carboxymethyl potato starch, and can be polymerized without adding additional initiators to obtain The products of low concentration and high concentration of Cr 3+ Both have a relatively large adsorption capacity, therefore, the present invention synthesizes and adsorbs Cr 3+ The resin process is simple, low in cost, and easier for large-scale production. 3+ Has a high adsorption capacity, the product contains Cr 3+ It has good application prospects in sewage treatment and soil remediation.

Description

technical field [0001] The invention discloses a novel adsorption Cr 3+ Resin and preparation method thereof, specifically relate to for containing Cr 3+ 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-concen...

AI Technical Summary

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.

Images