Insight into elemental mercury (Hg0) removal from flue gas using UV/H2O2 advanced oxidation processes

被引：23

作者：

Zhou, Changsong ^{[1
,2
,3
]}

Song, Zijian ^{[4
]}

Yang, Hongmin ^{[1
]}

Wu, Hao ^{[1
]}

Wang, Ben ^{[4
]}

Yu, Jie ^{[4
]}

Sun, Lushi ^{[4
]}

机构：

[1] Nanjing Normal Univ, Sch Energy & Mech Engn, Engn Lab Energy Syst Proc Convers & Emiss Reduct, Nanjing 210042, Jiangsu, Peoples R China

[2] Nanjing Normal Univ, Sch Chem & Mat Sci, Nanjing 210023, Jiangsu, Peoples R China

[3] Nanjing Normal Univ, Sch Energy & Mech Engn, Nanjing 210042, Jiangsu, Peoples R China

[4] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China

来源：

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2018年 / 25卷 / 21期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

UV/H2O2; Hg-0; Flue gas; Removal; (OH)-O-center dot radical; Mechanism; HETEROGENEOUS FENTON CATALYST; NITRIC-OXIDE; PHOTOCHEMICAL REMOVAL; HYDROGEN-PEROXIDE; COAL COMBUSTION; SULFUR-DIOXIDE; DEGRADATION; NO; NANOMINERALS; ABSORPTION;

D O I：

10.1007/s11356-018-2271-0

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Elemental mercury (Hg-0) emitted from coal-fired power plants and municipal solid waste (MSW) incinerators has caused great harm to the environment and human beings. The strong oxidized (OH)-O-aEuro cent radicals produced by UV/H2O2 advanced oxidation processes were studied to investigate the performance of Hg-0 removal from simulated flue gases. The results showed that when H2O2 concentration was 1.0 mol/L and the solution pH value was 4.1, the UV/H2O2 system had the highest Hg-0 removal efficiency. The optimal reaction temperature was approximately 50 A degrees C and Hg-0 removal was inhibited when the temperature was higher or lower. The yield of (OH)-O-aEuro cent radicals during UV/H2O2 reaction was studied by electron paramagnetic resonance (EPR) analysis. UV radiation was the determining factor to remove Hg-0 in UV/H2O2 system due to (OH)-O-aEuro cent generation during H2O2 decomposition. SO2 had little influence on Hg-0 removal whereas NO had an inhibitory effect on Hg-0 removal. The detailed findings for Hg-0 removal reactions over UV/H2O2 make it an attractive method for mercury control from flue gases.

引用

页码：21097 / 21105

页数：9

共 62 条

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