Fe/Al_2O_3催化剂催化氧化兰炭废水

采用浸渍法制备Fe/Al_2O_3催化剂,采用BET、XRD和穆斯堡尔谱等进行结构和性能表征。以自制Fe/Al_2O_3为催化剂,应用催化湿式过氧化氢氧化技术处理COD为6 742 mg·L-1的兰炭废水,通过建立正交实验确定最佳实验条件,结果表明,在p H=4、过氧化氢添加量9.6 m L、反应时间150 min和反应温度80℃条件下,兰炭废水COD去除率达66.30%。对催化氧化后的废水进行GC-MS分析,确定最终氧化产物主要为乙酸。表明自制Fe/Al_2O_3催化剂具有优良的催化效果,并使大分子难降解有机污染物分解为易生化的小分子污染物,甚至被完全分解矿化。

Catalytic oxidation of semi-coking wastewater over Fe/Al2O3 catalyst

Fe/Al₂O₃ catalyst was prepared by the impregnation method.The structure and performance of as-prepared catalyst were characterized by Brunauer-Emmett-Teller surface area analyzer (BET), X-ray diffraction (XRD) and Mssbauer Spectrum techniques.Fe/Al₂O₃ catalyst was used to treat the semi-coking wastewater with COD of 6 742 mg·L^-1 by the method of catalytic wet hydrogen peroxide oxidation (CWPO). The best experimental condition was determined by orthogonal experiments.The results showed that COD removal rate of semi-coking wastewater reached 66.30% under the condition as follows: pH=4, hydrogen peroxide dosage 9.6 mL, reaction time 150 min and reaction temperature 80 ℃. The wastewater after catalytic oxidation was analyzed by using GC-MS,and the final oxidation product determined was mainly acetic acid. The homemade Fe/Al₂O₃ catalyst had excellent catalytic effect,and the big molecules organic pollutants, which were difficultly biodegraded, could be degraded into small molecules with biodegradability, and even could be completely decomposed and mineralized.