摘要：文中介绍了自然水体[溶解氧(DO)质量浓度为(8.0±0.3) mg/L]中，紫外/亚硫酸盐/DO(UV/sulfite/DO)体系对溴酸盐(以<img id="6ec49d53d98b899265434a2acc9390fc" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/aa9ba10bf3554e63734dd4340c01b502.jpg" width="31" height="11" title="width=31,height=11,dpi=110" />计)的去除效能及活性物质作用机制。UV/sulfite/DO体系首先产生水合电子<img id="82dce9ecb139694ab9ed8f6e1210bfc3" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/e734b5bfdbfdfda026cd57642be04f35.jpg" width="33" height="12" title="width=33,height=12,dpi=110" />氢原子自由基(H·)和亚硫酸根自由基<img id="5c7442cdf984e4c8a794f4c355255d0b" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/88b166a64db77119ed3a6dd2248543ef.jpg" width="42" height="11" title="width=42,height=11,dpi=110" />等活性物质，同时在自然水体作用下，产生硫酸根自由基<img id="9a066374045a5c7875eab8829fe0eea6" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/73fc469ffacb813a36c01e8cc039c93c.jpg" width="49" height="11" title="width=49,height=11,dpi=110" />羟基自由基(·OH)和超氧自由基<img id="77646d462d460ed0e106378239d27f83" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/6c6b73ca6a5bc5f9ecbcb63962155b6a.jpg" width="34" height="11" title="width=34,height=11,dpi=110" />等氧化性自由基。<img id="693c759ad68309c7317e67c96d8b64b2" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/4606e376efbfece70a38ee2faff4e116.jpg" width="13" height="12" title="width=13,height=12,dpi=110" />和H·主要将<img id="6ec49d53d98b899265434a2acc9390fc" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/aa9ba10bf3554e63734dd4340c01b502.jpg" width="31" height="11" title="width=31,height=11,dpi=110" />还原为Br-，经竞争动力学试验测定H·与<img id="6ec49d53d98b899265434a2acc9390fc" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/aa9ba10bf3554e63734dd4340c01b502.jpg" width="31" height="11" title="width=31,height=11,dpi=110" />的二级反应速率常数为<img id="17b130e41bac4f6ffda0183de71de0fd" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/72d84be9a0bbcdb76405dcfdf0db467b.jpg" width="223" height="13" title="width=223,height=13,dpi=110" />对<img id="6ec49d53d98b899265434a2acc9390fc" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/aa9ba10bf3554e63734dd4340c01b502.jpg" width="31" height="11" title="width=31,height=11,dpi=110" />的去除没有影响，但其经DO氧化链式反应产生的<img id="63df1410f35400428155a90bef22d632" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/7f937cd92e9785979fd829f535f2ef31.jpg" width="28" height="11" title="width=28,height=11,dpi=110" />和·OH可通过氧化Br-二次生成<img id="6ec49d53d98b899265434a2acc9390fc" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/aa9ba10bf3554e63734dd4340c01b502.jpg" width="31" height="11" title="width=31,height=11,dpi=110" />而对<img id="6ec49d53d98b899265434a2acc9390fc" class="picture_figure_line" src="http://rtt.5read.com/pdgpath/ba/ba77/ba777d00b54eb5f7d45bef7acbffb48f/aa9ba10bf3554e63734dd4340c01b502.jpg" width="31" height="11" title="width=31,height=11,dpi=110" />的去除表现出抑制作用。

关键词：紫外/亚硫酸盐体系，溴酸盐，活性物质，机制，效能

基金资助：国家自然科学基金：饮用水长距离输配中余氯与微生物介导联合作用下卤代腈变化机制与控制研究(51978238)

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