摘要
为减小Fenton反应过程产生的二次污染,以80-100目的ZSM-5分子筛为载体,用浸溃法合成Fe-Ni/ZSM-5分子筛催化剂降解硝基苯,采用X射线衍射和N2吸附-脱附进行催化剂表征;研究H2O2浓度、初始pH值、催化剂用量和底物浓度对硝基苯降解效率的影响.结果表明：在H2O2质量浓度为500mg/L、初始pH为3、催化剂质量浓度为1g/L、硝基苯质量浓度为50mg/L、溫度25℃下,经过7h,硝基苯降解率为76.6%;该反应分为2个阶段,前4h催化剂的吸附起主导作用,后3h催化剂催化产生（·OH）,Fenton反应起主导作用.
In order to remove pollution of the Fenton process, Fe-Ni/ZSM-5 catalyst was prepared via impregnation method with 80-100 mesh size of ZSM-5 zeolite as the carrier to degrade nitrobenzene and was characterized by X-ray diffraction and N2 adsorption/desorption. The effects of H2O2 concentration, initial pH value, the dosage of catalyst and the substrate concentration on performance of the Fenton catalyst nitrobenzene removal were investigated. The results show that： under the optimum conditions of H2O2 concentration is 500 mg/L, the initial pH is 3 , catalyst dosage is 1 g/L, content of nitrobenzene is 50 mg/L, the reaction temperature is 25 ℃ and reaction time is 7 h , the nitrobenzene removal reaches 76.6%. The catalyst adsorped nitrobenzene in the first 4 h and nitrobenzene is rapidly degraded by Fenton reaction with （ · OH） in later 3 h .
出处
《天津工业大学学报》
CAS
北大核心
2016年第6期45-49,共5页
Journal of Tiangong University
基金
国家自然科学基金资助项目(41201487)
