文献类型：期刊文献

英文题名：Efficient naphthalene degradation in FeS2-activated nano calcium peroxide system: Performance and mechanisms

作者：Liu, Yulong[1];Sheng, Xianxian[1];Zhou, Zhikang[1];Wang, Peng[1];Lu, Zhanpeng[1];Dong, Jiaqi[1];Sun, Yong[1];Lyu, Shuguang[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China

年份：2022

卷号：432

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20220036655);WOS:【SCI-EXPANDED(收录号:WOS:000791270000004)】；

基金：This study was financially supported by a grant from the National Natural Science Foundation of China (No. 41977164), National Key Research and Development Program of China (No. 2018YFC1802500) and "One Belt and One Road" International Academic Cooperation and Exchange Program of Shanghai Science and Technology Committee (No. 19230742200).

语种：英文

外文关键词：Groundwater remediation; Hydroxyl radicals; Nano calcium peroxide; Naphthalene; Pyrite

摘要：Naphthalene (NAP) has received increasing concern due to frequent detection in groundwater and harm to humans. In this study, FeS2 was selected as a novel catalyst to activate nano calcium peroxide (nCP) for NAP degradation. Batch experiments were conducted in a 250 mL glass reactor containing 0.1 mM NAP solution to investigate the effect of reagents dosage, pH, air conditions (with or without N-2 purge), and different solution matrixes on NAP degradation. Scavenging tests, electron paramagnetic resonance (EPR) spectrum, and radical probe tests were conducted to identify the main radicals. Results indicated that over 96% NAP was removed in a wide pH range (3.0-9.0) within 180 min at optimal dosage of nCP = 1.0 mM and FeS2 = 5.0 g L-1 in nCP/FeS2 system. Aerobic condition was more beneficial to NAP degradation and the system could tolerate complex solution conditions. Moreover, HO center dot was determined to be responsible for NAP degradation. NAP degradation intermediates were detected by gas chromatography-mass spectrometry (GC-MS) and the possible degradation pathways were revealed. Finally, the efficient degradation of other organic pollutants confirmed the broadspectrum reactivity of the nCP/FeS2 system. Overall, these findings strongly demonstrated the potential applicability of nCP/FeS2 system in remediating organic contaminated groundwater.