醇类对UV-Fenton体系羟基自由基淬灭效率的影响
China Environmental Science（2018）
Abstract
设计了醇类对UV-Fenton体系羟基自由基(·OH)淬灭的对比实验,考察了均相和多相UV-Fenton体系中醇的种类和浓度对·OH淬灭效率的影响,采用荧光光谱法定量测定了醇淬灭条件下多相UV-Fenton体系·OH浓度的变化规律.结果表明,一元醇对·OH淬灭能力为叔丁醇>异丙醇>乙醇>正丙醇>正丁醇>甲醇;多元醇对·OH的淬灭能力随链长和羟基数量的增加而增强.其中,丙三醇对Fe3O4多相UV-Fenton体系中·OH的1段淬灭效率为86.7％,2段为61.7％;其对均相UV-Fenton体系中·OH的1段淬灭效率为79.6％,2段为65.6％.丙三醇在均相和多相UV-Fenton体系均能高效稳定地淬灭·OH,是一种新型的高效·OH淬灭剂.
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Key words
alcohol,UV-Fenton,glycerol,hydroxyl radicals,scavenging efficiency
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