摘要
吡虫啉生产废水属于典型的高浓度难降解毒性有机废水,直接排放会对环境造成严重污染,目前并无成熟的处理工艺可循。在2L压力反应器内,对吡虫啉农药废水进行湿式过氧化氢氧化（WPO）及催化湿式过氧化氢氧化（CWPO）降解处理。分别考察了过氧化氢加入量、反应温度、进水pH和催化剂等对反应过程与污染物降解的影响规律。结果表明：WPO和CWPO能在温和的条件下降解难于生物降解的吡虫啉农药废水,温度110℃、压力0.6MPa、双氧水用量为理论需氧量、进水pH=3.5的条件下,WPO处理吡虫啉农药废水,其COD去除率为47.7%;采用非均相Cu-Ni-Ce/SiO2催化剂,其它条件相同,pH=7.0,CWPO对同一废水的COD去除率可达到89.1%。计算得到CWPO和WPO基于COD的第1阶段表观活化能分别为11.2kJ/mol和29.6kJ/mol。
The treatment of imidacloprid wastewater by wet peroxide oxidation （WPO） and catalytic wet peroxide oxidation （CWPO） processes was studied in a two-litre autoclave. Effects of the dosage of hydrogen peroxide, reaction temperature, pH value in influent, catalysts, and etc. were investigated on the oxidation process and the degradation efficiency. The results have shown that organic pollutants in imidacloprid wastewater could be degraded by WPO and CWPO processes at lower pressure and temperature, and 47.7% of COD removal was attained under the conditions of 110℃ in temperature, 0.6 megapascals in pressure, initial pH = 3.5 and theoretical dosage of oxydol. With a heterogeneous catalyst of Cu-Ni-Ce/SiO2, 89.1% of COD removal could be obtained by the CWPO process under the same reaction conditions except for pH = 7.0. The apparent activation energies of CWPO and WPO were calculated to be 11.2 kilojoules per mole and 29.6 kilojoules per mole, respectively.
出处
《上海环境科学》
CAS
CSCD
2008年第3期108-111,116,共5页
Shanghai Environmental Sciences
基金
陕西省教育厅专项科研计划资助项目,编号04JK235
陕西省自然科学基金资助项目,编号2004B28。
关键词
湿式过氧化氢氧化
过氧化氢
吡虫啉
农药废水
催化剂
Wet peroxide oxidation （WPO） Hydrogen peroxide Imidacloprid Pesticide wastewater Catalyst
