文献类型：期刊文献

英文题名：Enhanced degradation of naphthalene in persulfate-based systems coupled with calcium sulfite: Elucidation of degradation mechanisms and pathways

作者：Zeng, Guilu[1];Yang, Rumin[1];Habib, Mudassir[1];Zhou, Zhengyuan[1];Xu, Zhiqiang[1];Sui, Qian[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：2024

卷号：330

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20234214879694);WOS:【SCI-EXPANDED(收录号:WOS:001096949500001)】；

基金：This work was financially supported by a grant from the National Natural Science Foundation of China (No. 41977164) .

语种：英文

外文关键词：Calcium sulfite; Enhancement mechanism; Reactive oxygen species; Degradation intermediates; Groundwater remediation

摘要：Na2SO3 and NaHSO3 have been widely used as the source of SO32-to participate in the reproduction of Fe(II) in iron-based advanced oxidation processes. In this work, CaSO3 with low solubility was innovatively introduced and compared with Na2SO3 and NaHSO3 to investigate their effects on naphthalene (NAP) degradation in Fe(II)-activated peroxydisulfate (PDS) and peroxymonosulfate (PMS) processes. The results showed that CaSO3 dis-played a better performance due to its sustained-release of SO32-, and NAP removal increased from 57.6% and 77.7% to 91.4% and 98.5% in PDS/Fe(II) and PMS/Fe(II) processes, respectively, with the addition of CaSO3. The enhancement mechanisms of CaSO3 were illustrated by measuring the variation of iron and SO32- concen-trations and by quantitatively determining the production of reactive oxygen species (ROS). The dominant ROS generated in CaSO3-enhanced systems was confirmed by scavenging tests. Moreover, NAP degradation in-termediates and pathways, as well as the toxicological properties of intermediates, were accordingly elucidated. Finally, CaSO3-enhanced systems had a wide application range of pH, and exhibited a great performance on the tolerance of various water matrixes. The significant removal of various contaminants in CaSO3-enhanced pro-cesses confirmed that these techniques are suitable for the remediation of organic contaminated groundwater.