Destruction of benzene by ultraviolet light-catalyzed oxidation with hydrogen peroxide
Destruction of benzene by ultraviolet light-catalyzed oxidation with hydrogen peroxide
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紫外光催化过氧化氢氧化破坏苯
DOI：
10.1089/hwm.1987.4.165
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
H. E. Klei
中科院分区：
文献类型：
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作者：
B. Weir;D. Sundstrom;H. E. Klei
用传统的处理方法去除水中低含量的有害有机化合物通常是困难和昂贵的。研究了紫外光催化过氧化氢氧化苯的方法。氧化在配备有254 nm杀菌UV灯的石英环形反应器中进行。过氧化氢和紫外光的组合比单独的紫外光更迅速地破坏苯。氧化速率可以通过增加反应器中最初存在的过氧化氢的浓度或通过增加UV光强度来增加。碱性pH值对反应速率不利，可能是因为过氧化氢的碱催化分解。在254 nm处的吸光度的处理苯溶液中的快速增加进行了观察，并归因于强烈吸收的芳香族氧化中间体的存在下。鉴定出4种中间体。
ABSTRACT The removal of low levels of hazardous organic compounds from water is often difficult and expensive by conventional treatment methods. A promising method in which pollutants are oxidized by ultraviolet (UV) light-catalyzed hydrogen peroxide has been investigated for an aromatic pollutant, benzene. The oxidations were conducted in a quartz annular reactor equipped with a 254 nm germicidal UV lamp. Benzene was more rapidly destroyed by the combination of hydrogen peroxide and UV light than by UV light alone. The rate of oxidation could be increased by increasing the concentration of hydrogen peroxide initially present in the reactor or by increasing the UV light intensity. Alkaline pH was detrimental to the reaction rate, probably because of the base-catalyzed decomposition of hydrogen peroxide. A rapid increase in the absorbance of treated benzene solutions at 254 nm was observed, and attributed to the presence of strongly absorbing aromatic oxidation intermediates. Four intermediates were identi...