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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。
Imidacloprid wastewater is a typical high concentration of refractory toxic organic wastewater, direct emissions will cause serious pollution to the environment, there is no mature treatment process to follow. In a 2L pressure reactor, imidacloprid pesticide wastewater was treated by wet hydrogen peroxide (WPO) and catalytic wet hydrogen peroxide oxidation (CWPO). The effects of hydrogen peroxide dosage, reaction temperature, feed water pH and catalyst on the reaction process and pollutants degradation were investigated respectively. The results showed that WPO and CWPO can degrade imidacloprid pesticide wastewater which is difficult to be biodegraded under the condition of 110 ℃, pressure 0.6MPa, the dosage of hydrogen peroxide is the theoretical oxygen demand, the pH value is 3.5, WPO treatment of imidacloprid pesticide The removal rate of COD was 47.7%. The heterogeneous Cu-Ni-Ce / SiO2 catalyst was the same for other conditions. The pH value was 7.0. The COD removal efficiency of CWPO for the same wastewater was 89.1%. The calculated first order apparent activation energies of CWPO and WPO based on COD were 11.2 kJ / mol and 29.6 kJ / mol, respectively.