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 Fe²⁺ 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/Fe²⁺) 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.

我们在紫外线（UV，波长为365 nm）和紫外光下使用光芬顿法对稻壳碱性水解产物[pH为2，化学需氧量（COD）为12.8 g / L]的无木质素溶液进行了光催化处理。可见光谱。木质素的氧化以COD：H ₂ O _2的质量比为1：2且Fe ²⁺浓度为80 mg / L进行。已经确定，为了破坏碱性木质素，必须暴露于可见光或紫外线辐射。不含木质素的溶液的脱色效率取决于溶液的稀释率。先进的氧化光芬顿处理（UV /Н ₂ О ₂ /铁²⁺）可以以1：5的稀释比将无木质素溶液的颜色降低94％的脱色效率，87％的酚类化合物和79％的COD。借助气相色谱，破坏木质素的产品低毒且可用。