文献类型：期刊文献

英文题名：Coupled Use of Modified Bentonite and Urea Hydrogen Peroxide to Degrade Paraxylene

作者：Ma, Lijuan[1];Linghu, Shanshan[1];Chen, Zhichong[1];Wang, Shuoyuan[1];Gu, Hao[1];Pan, Tao[1];Chen, Xiurong[1,2]

机构：[1]East China Univ Sci & Technol, Protect Key Lab Environm Risk Assessment & Control, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Natl Engn Lab High Concentrat Refractory Organ Was, Shanghai 200237, Peoples R China

年份：2023

卷号：234

期号：4

外文期刊名：WATER AIR AND SOIL POLLUTION

收录：;EI(收录号：20231313818147);WOS:【SCI-EXPANDED(收录号:WOS:000984514200002)】；

基金：This work was supported by 2019YFC1806104. The author Xiurong Chen has received research support from Ministry of Science and Technology of the People's Republic of China

语种：英文

外文关键词：Odour inhibitor; Bentonite; Urea peroxide; Paraxylene

摘要：The diffusion of odour caused by excavation disturbance during the restoration of pesticide sites adversely affects the surrounding environment. Therefore, it is essential to develop a new type of odour inhibitor that has both adsorption and oxidation functions and can effectively block odour. In this study, bentonite-modified cetyltrimethyl ammonium bromide (CTAB) was synthesised, and the structural changes of bentonite before and after modification were analysed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and other characterisation methods. Urea peroxide was loaded on modified bentonite (150C-Bent) by in situ synthesis method, and the preparation conditions were optimised. The effects of temperature, humidity and species on the adsorption behaviour and adsorption kinetics were studied by adsorption experiments. It is demonstrated that CTAB is embedded in bentonite through ion exchange, and the interlayer spacing expands from 1.42 to 3.11 nm. The optimal loading mass ratio of modified bentonite to urea peroxide was 1:1.5 and pH was 3. When the relative humidity is 54.3% and the temperature is 55 degrees C, the removal effect of paraxylene is the best; the optimal removal reached 82.4%. The adsorption behaviour of 1.5UHP-Bent conforms to the pseudo-second-order kinetic adsorption model. The adsorption pathway of paraxylene on UHP-Bent mainly includes partition effect and hydroxyl radical capture.