Hyperbranched multiamino compound modified rice straw cellulose adsorbent and preparation method thereof

Abstract

The invention relates to a hyperbranched multiamino compound modified rice straw cellulose adsorbent. A preparation method of the hyperbranched multiamino compound modified rice straw cellulose adsorbent is characterized by comprising the following steps: firstly preparing rice straw cellulose by smashing, blasting with steam, extracting with hot water and carrying out alcohol dissolving; secondly, carrying out reaction on the rice straw cellulose and epoxy chloropropane, so that epoxidized cellulose is obtained; then carrying out reaction on the epoxidized cellulose and a hyperbranched multiamino compound, so that amino modified cellulose is obtained; and finally compounding the amino modified cellulose and sodium alginate in ionic liquid, so that the hyperbranched multiamino compound modified rice straw cellulose adsorbent is obtained. The preparation method provided by the invention has relatively mild conditions, is simple in technology, easy in operation and easy in mass production, has a good industrialized popularization prospect, has strong heavy metal adsorbing capability and can be applied to the field of treatment of heavy metal ion wastewater and organic wastewater.

Description

technical field [0001] The invention belongs to the field of adsorbents, in particular to a rice straw cellulose adsorbent modified by hyperbranched polyamino compounds and a preparation method thereof. Background technique [0002] With the continuous acceleration of China's industrialization, more and more industries are involved in heavy metal emissions, including mining, metal smelting, chemical industry, printing and dyeing, leather, pesticides, feed, etc. In addition, some polluting enterprises have illegal mining and excessive sewage discharge. Prominent, so heavy metal pollution incidents appear high incidence trend. Water pollution caused by unreasonable discharge of industrial wastewater has always been a serious environmental problem. Heavy metal ions are highly toxic at low concentrations and can accumulate in biological organisms, causing a series of disorders and diseases. Therefore, the separation and removal of heavy metal ions from industrial wastewater pla...

AI Technical Summary

Problems solved by technology

The chemical precipitation method mainly uses limestone-type alkaline substances to precipitate and separate heavy metal ions, but the heavy metal ions separated from the water body are precipitated into the mud at the bottom of the river, which still causes harm to the environment and organisms; activated carbon adsorption method and ion The exchange method can separate heavy metals from water well, but its cost is too high and its application is limited