Photocatalytic Treatment of Waste Water from Rice Husk Alkaline Hydrolysate

作     者：Olga D. AREFIEVA Marina S. VASILYEVA Ekaterina V. ERMOLENKO Anastasiia V. BYCHKOVA 

作者机构：Far Eastern Federal University Vladivostok 690950Russian Federation Institute of Chemistry Far-Eastern BranchRussian Academy of Sciences Vladivostok 690022 Russian Federation National Scientific Center of Marine Biology Far Eastern BranchRussian Academy of SciencesVladivostok 690041Russian Federation 

出 版 物：《Rice science》 (水稻科学（英文版）)

年 卷 期：2019年第26卷第4期

页      面：257-260页

核心收录：

学科分类：0710[理学-生物学] 09[农学] 0901[农学-作物学] 

主　　题：chemical oxygen demand dilution ratio visible spectrum 

摘      要：SUMMARY We carried out photocatalytic treatment of a lignin-free solution of rice husk alkaline hydrolysate [pH of 2, chemical oxygen demand (COD) of 12.8 g/L] using photo-Fenton process in the ultraviolet (UV, wavelength of 365 nm) and visible spectrum. Oxidation of lignin was performed at a constant mass ratio of COD:H2O2 as 1:2 and Fe^2+ concentration of 80 mg/L. It was established that for the destruction of alkaline lignin, exposure to visible or UV radiation was necessary. Decolorization efficiency of a lignin-free solution depends on the dilution rate of the solution. The advanced oxidative photo-Fenton process (UV/Н2О2/Fe^2+) made it possible to reduce the color of lignin-free solution at a dilution ratio of 1:5 by 94% of decolorization efficiency, 87% of phenolic compound and 79% of COD. With the help of gas chromatography, the products of lignin destruction were low-toxic and usable.