文献类型：期刊文献

英文题名：Degradation of phenanthrene in aqueous solution by a persulfate/percarbonate system activated with CA chelated-Fe(II)

作者：Yu, Sixia[1];Gu, Xiaogang[2];Lu, Shuguang[1];Xue, Yunfei[1];Zhang, Xiang[1];Xu, Minhui[1];Qiu, Zhaofu[1];Sui, Qian[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Shanghai Urban Construct Design & Res Inst Grp Co, Shanghai 200125, Peoples R China

年份：2018

卷号：333

起止页码：122

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20174604398372);WOS:【SCI-EXPANDED(收录号:WOS:000417304500014)】；

基金：This study was financially supported by the grant from the National Natural Science Foundation of China (41373094) and Natural Science Foundation of Shanghai (16ZR1407200).

语种：英文

外文关键词：Phenanthrene (PHE); Percarbonate; Persulfate; Chelated-Fe(II); Dual oxidant

摘要：A persulfate/percarbonate (PS/SPC) system activated with citric acid (CA) chelated-Fe(II), which combined the benefits of sole PS and SPC systems, was conducted for phenanthrene (PHE) degradation in aqueous solution. The effects of oxidant concentration, Fe(II)-CA dosage, PS/SPC molar ratio and initial solution pH were investigated in the laboratory. The results indicated that the addition of CA could remarkably enhance PHE removal, and PHE could be degraded completely at 0.5 mM PS, 0.5 mM SPC and 0.5 mM Fe(II) with 0.1 mM CA in 60 min. PHE oxidation process was more efficient in acidic condition, which presented a two-stage degradation pattern and PHE removal followed a pseudo-first-order kinetic model in the second stage. The results of free radical probe tests, scavenging tests and EPR analysis demonstrated that center dot OH was the predominant radical for PHE oxidation. The major degradation intermediates of PHE were identified by LC-MS, and the possible reaction mechanism and PHE degradation pathways were proposed.