Method for synthesizing Cu2+ adsorbing resin by using carboxymethyl potato starch as raw material

Abstract

The invention discloses a method for synthesizing Cu2+ adsorbing resin by using carboxymethyl potato starch as a raw material through hydrogen peroxide oxidation and by using a one-pot method. The method is mainly characterized in that hydrogen peroxide oxidized carboxymethyl potato starch is not separated, washed or purified, the carboxymethyl potato starch as well as acrylic acid without a polymerization inhibitor and sodium salt of the acrylic acid are heated by water bath under protection of nitrogen to synthesize the Cu2+ adsorbing resin by the one-pot method, the adsorption quantity of the product synthesized under the optimum condition to Cu2+ with the concentration of 5 ppm is 15.19 mg/g, the adsorption quantity to Cu2+ with the concentration of 50 ppm is 128.72 mg/g, and the removal rate to Cu2+ with the concentration of 5-50 ppm is 48.12%-48.52%. The method has the advantages that the hydrogen peroxide oxidized carboxymethyl potato starch is not required to be separated, purified or washed as the traditional oxidized carboxymethyl potato starch, polymerization can be realized without extra initiators, the prepared product has large adsorption quantity to Cu2+ with low concentration and Cu2+ with high concentration, therefore, a process of synthesizing the Cu2+ adsorbing resin is simple, the cost is low, large-scale production is easy to realize, and because adsorption quantity to Cu2+ is quite high, the product has good application prospect in aspects of treatment of Cu2+-containing sewage, soil restoration and the like.

Description

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

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Problems solved by technology

This waste water is discharged into the water body, which will affect the quality of the water

When the copper content in water reaches 0.01mg / L, it has obvious inhibitory effect on the self-purification of water; if it exceeds 3.0mg / L, it will produce peculiar smell; if it exceeds 15mg / L, it will not be drinkable

If copper-containing wastewater is used to irrigate farmland, copper will accumulate in the soil and crops, which will cause poor growth of crops, especially rice and barley, and will pollute grains

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