文献类型：期刊文献

英文题名：Elucidating the effect of different desorbents on naphthalene desorption and degradation: Performance and kinetics investigation

作者：Zeng, Guilu[1];Yang, Rumin[1];Tian, Shuang[1];Zhou, Zelong[1];Wang, Qi[1];Yu, Xiu[1];Fu, Rongbing[2];Lyu, Shuguang[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Tongji Univ, Ctr Environm Risk Management & Remediat Soil & Gr, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China

年份：2022

卷号：434

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20221511953816);WOS:【SCI-EXPANDED(收录号:WOS:000793534400003)】；

基金：This work was financially supported by a grant from the Science and Technology Commission of Shanghai Municipality (No. 20DZ1204502) 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：Naphthalene; Desorbent; Desorption kinetics; Degradation mechanism; Contaminated site remediation

摘要：In this work, the effect of different desorbents (low molecular weight organic acids (LMWOAs), surfactants, and inorganic salts) on naphthalene (NAP) desorption in soil was investigated, and the results showed that NAP desorption pattern fitted the pseudo-second-order kinetics. The addition of LMWOAs, especially citric acid (CA), could stimulate the reactive oxygen species (ROS) generation and NAP degradation in Fe(II) activated persulfate (PS) system, while the presence of surfactants and CaCl2 could inhibit the NAP removal due to the competitive consumption of ROS. The maximum removal of NAP was 97.5% within 120 min at the PS/Fe(II)/CA/NAP molar ratio of 15/5/1/1, and the pseudo-first-order kinetic constant of NAP removal increased from 0.0110 min-1 to 0.0783 min- 1 with the addition of CA. Compared with surfactants and inorganic salts, LMWOAs, especially CA, were more suitable as desorbent in soil washing coupled with in situ chemical oxidation technique. Moreover, 1.86 mg L-1 desorbed amount and 36.1% removal of NAP from soil could be obtained with the presence of 1 mM CA. Finally, the significant removal of NAP and other contaminants (phenanthrene, fluoranthene, and benzene series) in actual groundwater could provide theoretical basis and technical support for the remediation of organic contaminated sites with desorbents.