木质素
降级(电信)
光催化
化学
化学工程
材料科学
环境化学
光化学
催化作用
有机化学
工程类
电信
作者
Sushil Kumar Kansal,Manmohan Singh,Dhiraj Sud
标识
DOI:10.1016/j.jhazmat.2007.08.091
摘要
The photocatalytic degradation of lignin obtained from wheat straw kraft digestion has been investigated by using TiO2 and ZnO semiconductors. ZnO has been found to be a better photocatalyst than TiO2. The different variables studied, include catalyst dose, solution pH, oxidant concentration and initial concentration of the substrate. The degradation of lignin was favorable at pH 11. Optimum values of catalyst dose and oxidant concentration were found to be 1 g/l and 12.2 × 10−6 M, respectively. The degradation of the organic compound was also evaluated as COD removal and increase in the COD removal was observed with increase in degradation rate. An attempt has also been made to explore the applicability of ZnO in immobilized mode for the degradation of lignin under solar light for industrial scale application. Further the comparative evaluation of ZnO in slurry/immobilized mode has been carried out.
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