Removal of 2-MIB and geosmin by electrogenerated persulfate: Performance, mechanism and pathways

被引：86

作者：

Bu, Lingjun ^{[1
]}

Zhou, Shiqing ^{[1
]}

Shi, Zhou ^{[1
]}

Deng, Lin ^{[1
]}

Gao, Naiyun ^{[2
]}

机构：

[1] Hunan Univ, Coll Civil Engn, Dept Water Engn & Sci, Key Lab Bldg Safety & Energy Efficiency,Minist Ed, Changsha 410082, Hunan, Peoples R China

[2] Tongji Univ, Coll Environm Sci & Engn, Minist Educ, State Key Lab Pollut Control & Resources Reuse,Ke, Shanghai 200092, Peoples R China

来源：

CHEMOSPHERE | 2017年 / 168卷

关键词：

Electrochemical oxidation; In-situ generated persulfate; Taste & odor compounds; Pathway; ADVANCED OXIDATION PROCESSES; BORON-DOPED DIAMOND; ELECTROCHEMICAL DEGRADATION; ELECTRO-FENTON; ODOR COMPOUNDS; WATER; GENERATION; TASTE; 2-METHYLISOBORNEOL; KINETICS;

D O I：

10.1016/j.chemosphere.2016.11.134

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, the degradation of 2-methylisoborneol (2-MIB) and geosmin (GSM) was evaluated by electrochemical oxidation (EO) using boron-doped diamond (BDD) electrode. Both 2-MIB and GSM could be degraded efficiently in sulfate electrolyte compared to inert nitrate or perchlorate electrolytes, implying that in-situ generated persulfate may be responsible for contaminants degradation. The observed linear relationship between 2-MIB (GSM) degradation rates and persulfate generation rates further proved that the in-situ generated persulfate enhanced 2-MIB (GSM) degradation: Moreover, a divided electrolytic cell was employed to investigate the effect of cathodic reactions on contaminants degradation and persulfate generation, and results confirmed that both anodic and cathodic reactions participated in 2-MIB (GSM) degradation. High current density and low solution pH were found to be favorable for 2-MIB and GSM degradation. The degradation intermediates were identified and the possible pathways of 2-MIB and GSM degradation were proposed. This study indicated that the EO process with BDD anode could be considered as a potential alternative for the removal of 2-MIB and GSM. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1309 / 1316

页数：8

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