Based on rice straw,the hydrophobic/lipophilic material was prepared by surface modification method by using sodium hydroxide,hydrogen peroxide and vinyl triethoxysilane.The structures of raw rice straw,pretreated rice straw and modified rice straw were characterized by scanning electron microscopy (SEM),fourier transform infrared (FT-IR),thermogravimetric analysis (TG) and contact-angle (CA) measurements,and the oil absorption effect and selective adsorption for organic water pollution were studied.The results showed that the modified materials exhibited a mild wetting angle of above 148.9°,and the maximum adsorption capacity to various oils and organic solvents was improved greatly.Furthermore,the modified rice straw performed excellent selective adsorption for organic water pollution.Therefore,the low cost modified rice straw had great potential for the better utilization of agricultural residues as natural sorbents for the clean-up of organic water pollution.
Ren Junpeng, Huang Tingting, Wang Yu, Dong Cuige, Zhao Jun, Ma Xiaoyun
. Study on adsorption performance and mechanism of surface modified rice straw for organic pollutants[J]. New Chemical Materials, 2020
, 48(11)
: 260
-263
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.11.058
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