| 烟气脱硫液中Hg2+还原及稳定化初探 |
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| 引用本文： | 成潇雅,汤婷媚,张萌,钟晓航,沃静静,徐新华.烟气脱硫液中Hg2+还原及稳定化初探[J].浙江大学学报(理学版),2010,37(5):568-571. |
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| 作者姓名： | 成潇雅 汤婷媚 张萌 钟晓航 沃静静 徐新华 |
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| 作者单位： | 浙江大学,环境工程系,浙江,杭州,310027 |
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| 基金项目： | 国家863课题，国家自然科学基金资助项目 |
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| 摘 要： | 针对烟气脱硫液中Hg2+易被还原并再释放进入大气,造成二次污染的特点,研究脱硫液中汞离子的还原释放机制以及稳定化的方法.对于前者,考察了pH、SO32-、Ca2+和Mg2+等因素对Hg2+还原速率的影响;对于后者,主要采用螯合沉淀法,通过实验对比了TMT和DTCR两种金属离子捕捉剂的性能.通过本研究,可以有效解决Hg2+在脱硫液中的还原释放及二次污染问题,并为湿法脱硫同时脱汞的工业应用提供理论依据.
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| 关 键 词： | 脱硫液 Hg2＋ 还原释放 稳定化 TMT DTCR |
Primary research of Hg2+ reduction and stabilization in wet flue gas desulfurization liquors |
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| CHENG Xiao-ya,TANG Ting-mei,ZHANG Meng,ZHONG Xiao-hang,WO Jing-jing,XU Xin-hua.Primary research of Hg2+ reduction and stabilization in wet flue gas desulfurization liquors[J].Journal of Zhejiang University(Sciences Edition),2010,37(5):568-571. |
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| Authors: | CHENG Xiao-ya TANG Ting-mei ZHANG Meng ZHONG Xiao-hang WO Jing-jing XU Xin-hua |
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| Institution: | (Department of Environmental Engineering,Zhejiang University,Hangzhou 310027,China) |
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| Abstract: | In this study,considering that Hg2＋ in wet flue gas desulfurization（FGD） systems can easily be reduced and then released into atmosphere,causing secondary pollution,Hg2＋ reduction mechanism and restraining method are carried out.The influences of several experimental parameters have been investigated,including pH,concentrations of Cl-and S（IV）,etc.In addition,stabilization of Hg2＋ was studied by using TMT and DTCR.The results showed that re-emissions apparently decreased as precipitation of TMT-Hg and DTCR-Hg solid lowers Hg2＋ concentration in solution.All of the above can provide theoretical basis for industrial application of mercury control in wet FGD systems. |
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| Keywords: | Hg2+ TMT DTCR |
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