Modified starch water treatment agent and preparation and application methods thereof

Abstract

The invention discloses a modified starch water treatment agent and preparation and application methods thereof. The preparation method of the modified starch water treatment agent comprises (1) adding water into Fe3O4 nanoparticle solution, performing ultrasonic treatment, adding in starch, performing ultrasonic treatment, adding NaCl solution, performing ultrasonic treatment, and through reaction, obtaining starch / Fe3O4 nano composite microspheres; (2) mixing the starch / Fe3O4 nano composite microspheres, NaOH solution and epoxypropane for reaction to obtain cross-linked starch / Fe3O4 nano composite microspheres; (3) mixing and uniformly stirring the cross-linked starch / Fe3O4 nano composite microspheres, deionized water and epoxypropane, adding in perchloric acid for reaction to obtain themodified starch water treatment agent. The modified starch water treatment agent can be applied to treating heavy metal wastewater and is high in absorbing effects on hazardous heavy metal in industrial wastewater, and meanwhile, treated residues are easy to decompose by microorganisms to be free from toxicity and harm to the environment, thereby being a highly environment-friendly absorbing material.

Description

technical field [0001] The invention belongs to the field of chemistry and new materials, and relates to a water treatment agent and its preparation method and application, in particular to a modified starch water treatment agent and its preparation method and application. Background technique [0002] The pollution caused by the discharge of wastewater containing a large amount of chemical substances, especially heavy metals such as cadmium, chromium, and lead, is one of the most serious environmental problems facing mankind today. With the shortage of water resources and the aggravation of water environment pollution, how to economically and effectively remove these heavy metals in wastewater has always been the goal of people's attention. In recent years, industrial water treatment technology has developed greatly. The current technology mainly includes the integrated combination of various methods such as chemical method, physical method, and physical chemical method. R...

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Problems solved by technology

Compared with the traditional physical and chemical adsorption treatment methods, the use of natural polymer materials as adsorption raw materials has obvious advantages. Starch, as a natural polymer material with a wide range of sources, low cost, non-toxic and easy to degrade, has gradually attracted attention. There are many types of starch-based adsorbents, different modification methods, and complex adsorption mechanisms. The related research is still in its infancy, and there are not many practical application studies. Therefore, it is of great practical significance to develop starch-based adsorbents with excellent adsorption properties.

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