Oxidation of organic pollutants in aqueous solutions by nanosized copper oxide catalysts
Oxidation of organic pollutants in aqueous solutions by nanosized copper oxide catalysts
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DOI：
10.1016/j.apcatb.2008.07.020
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发表时间：
2009-01-12
影响因子：
22.1
通讯作者：
Berkowitz, Brian
中科院分区：
文献类型：
--
作者：
Ben-Moshe, Tal;Dror, Ishai;Berkowitz, Brian
以过氧化氢为氧化剂，考察了纳米过氧化铜对水溶液中有机污染物的催化去除活性。甲草胺和菲的完全降解20分钟后实现。反应的动力学被认为是伪一阶相对于污染物。考察了由相同材料但不同来源和不同颗粒性质组成的不同催化剂样品对反应动力学的影响。考察了光照、氧化剂浓度、离子强度和pH等因素对反应的影响。该催化不是光诱导的，并且可以在没有UV-vis照射的情况下进行。尤其是。确定所研究系统的最佳氧化剂浓度。发现盐的存在抑制甲草胺的降解速率。添加高浓度的氧化剂或盐导致伪零级动力学。然而，发现非常高浓度（>1 M）的NaCl引起反应速率的显著增加。该催化剂在很宽的pH值范围内是有效的。(C)2008 Elsevier B. V.保留所有权利。
The catalytic activity of copperoxide nanoparticles was investigated for the removal of organic pollutants in aqueous solutions, using hydrogen peroxide as an oxidant. Complete degradation of both alachlor and phenanthrene was achieved after 20 min. The kinetics of the reaction was found to be pseudo-first-order with respect to the pollutant. The influence on the reaction kinetics of different catalyst samples, consisting of the same material but of different origin and different particle properties, was examined. The effects of several factors such as irradiation, oxidant concentration, ionic strength and pH on the reaction were also investigated. The catalysis is not photo-induced and can be performed without UV-vis irradiation. In particular. an optimal oxidant concentration was determined for the studied system. The presence of salts was found to inhibit the alachlor degradation rate. The addition of high concentrations of oxidant or salt results in pseudo-zero-order kinetics. However, NaCl at very high concentrations (>1 M) was found to cause a dramatic increase in reaction rate. The catalysis is efficient over a wide range of pH values. (C) 2008 Elsevier B.V. All rights reserved.