Advanced oxidation processes for the removal of organophosphorus pesticides from wastewater
Advanced oxidation processes for the removal of organophosphorus pesticides from wastewater
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DOI：
10.1016/j.desal.2005.09.027
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发表时间：
2006-06-10
期刊：
影响因子：
9.9
通讯作者：
Gad-Allah, Tarek A.
中科院分区：
文献类型：
--
作者：
Badawy, M. I.;Ghaly, Montaser Y.;Gad-Allah, Tarek A.
研究了Fenton反应、UV/H2O2和光Fenton工艺联合降解含磷底物如硝硫磷、二嗪磷和异丙磷的效果。设计了一个实验室装置来评估和选择最佳的氧化工艺。还研究了初始pH、COD/H2O2比、Fe(II)/H2O2比和光催化剂类型等参数，以确定最佳操作条件。动力学研究表明，所用模型物质的降解速率为一级，所计算的反应常数受所研究参数的影响。在最佳操作条件下重复氧化过程，以降解使用的模型物质混合物，以代表农药生产公司的实际废水排放。还对光化学过程的比能量消耗进行了粗略比较。实验结果表明，光增强Fenton反应（photofenton）是酸性条件下最有效、最经济的处理方法，可以替代其他传统的处理方法。
The combinations of the Fenton reaction, UV/H2O2 and the photo-Fenton process in the degradation of organophosphorus containing substrates such as fenitrothion, diazinon and profenofos were investigated. A laboratory set-up was designed to evaluate and select the optimal oxidation process. Several parameters were also studied: initial pH, COD/H2O2 ratios, Fe(II)/H2O2 ratios and the type of photocatalyst to define optimum operating conditions. The kinetic study indicated that the degradation rate of the used model substances was first order and the calculated reaction constants were affected by the parameters studied. The oxidation processes were repeated at the optimum operating conditions for the degradation of the mixture of the used model substances to represent the real wastewater effluent from a pesticide-producing company. A rough comparison of specific energy consumption was also evaluated to compare between the photochemical processes. The experimental results show that the light-enhanced Fenton reaction (photo-Fenton) proved to be a most effective and economic treatment process under acidic conditions and might be an alternative to other traditional processes.