文献类型：期刊文献

英文题名：Efficient removal of extractives from wood using an ultrasound-activated persulfate treatment strategy

作者：Shen, Yulin[1,2] Wang, Jilin[1,2] Lu, Yutong[1,2] Mo, Liuting[1,2] Zhao, Shujun[1,2] Qi, Fei[3] Huang, Anmin[4] Cai, Liping[5] Zhang, Shifeng[1,2]

第一作者：Shen, Yulin

通信作者：Zhang, SF[1];Zhang, SF[2]

机构：[1]Beijing Forestry Univ, MOE Key Lab Wooden Mat Sci & Applicat, Beijing 100083, Peoples R China;[2]Beijing Forestry Univ, Beijing Key Lab Wood Sci & Engn, Beijing 100083, Peoples R China;[3]Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing Key Lab Source Control Technol Water Poll, Beijing 100083, Peoples R China;[4]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[5]Univ North Texas, Mech & Energy Engn Dept, Denton, TX 76201 USA

年份：2022

卷号：56

期号：1

起止页码：171-186

外文期刊名：WOOD SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20214511134060);Scopus(收录号：2-s2.0-85118549262);WOS:【SCI-EXPANDED(收录号:WOS:000714990500001)】；

基金：The authors are grateful to acknowledge financial support from the National Natural Science Foundation of China (Project 51779005/E090301) and the Fundamental Research Funds for the Central Universities (NO. 2016ZCQ01). We also thank the referees for their valuable suggestions and comments.

语种：英文

外文关键词：Cavitation - Degradation - Electron spin resonance spectroscopy - Free radicals - Gas chromatography - Paramagnetic resonance - Sulfur compounds - Ultrasonics - Wood

摘要：Volatile organic compounds (VOCs) have a detrimental effect on human health and environments. Wood is rich in extractives and volatile oils, which release VOCs and unpleasant odors, and its degradation remains a significant challenge. To effectively remove wood VOCs, this study proposes a degradation treatment strategy based on the theory of advanced oxidation processes (AOPs), which is designed to use the cavitation effect of ultrasound (US) to activate persulfate (PS) and generate sulfate radicals (SO4-center dot) under the synergy of ultrasonic wave desorption and free radical (center dot OH) effects. Various controlling factors, including different PS concentrations, ultrasonic powers, and pH values, were evaluated. Using headspace solid-phase micro-extraction combined with gas chromatography-mass spectrometer (HSSPME/GC-MS), the analysis results of the degradation products of VOCs indicated that the removal rate of wood powder by the US-activated PS (US/PS system) was 83.64%. Moreover, the acidic condition and higher ultrasonic power facilitated the VOCs removal. In addition, the analysis by electron paramagnetic resonance (EPR) revealed that SO4-center dot and center dot OH were generated by the US cavitation effect. The degradation mechanism of the US/PS system was also investigated. The results of this work provide a new insight into the application of AOPs to remove VOCs in wood.