摘要
以五水合四氯化锡为原料,采用化学沉淀法制备了纳米SnO2光催化剂,采用电子显微镜和X光衍射仪对粉体的粒径、物象和形貌等进行了表征,对比分析了自制纳米SnO2对于养殖废水中氨氮的光催化降解情况。研究结果表明催化剂投加量、废水中氨氮初始质量浓度、溶液pH值和H2O2质量浓度均是影响氨氮催化氧化去除效果的重要因素。通过正交实验确定了SnO2光催化剂氧化的优化反应条件:SnO2投加量为1.2g/L,氨氮初始质量浓度为40mg/L,pH值为8.0,H2O2质量浓度为1.0g/L,催化时间为2h时,去除率可达72%。
Nano-SnO2 photocatalyst was obtained by the chemical precipitation method with SnCl4 · 5H2O as the raw material.The particle size of powders,object and morphology have been characterized using the X-ray diffraction and electron microscope.The photocatalytic degradation of ammonia nitrogen in aquaculture wastewater was investigated by using our home-made nano-SnO2.The effects of different degradation variables on the degradation efficiency were investigated,and the results show that nano-SnO2 catalyst dosage,the initial mass concentration of ammonia-N in wastewater,pH value,the mass concentration of H2O2 are the main effect factors.The optimum reaction conditions are as follows：nano-SnO2 catalyst dosage is 1.2 g/L,the initial concentration of ammonia-N is 20 mg/L,pH value is 8.0,reaction time is 2 hours and H2O2 concentration is 1.0 g/L.Under such condition,the removal rate of ammonia-N can nearly reach 72％.
出处
《海洋学研究》
CSCD
北大核心
2015年第2期64-69,共6页
Journal of Marine Sciences
基金
国家海洋公益性行业科研专项经费项目资助(20130500)
辽宁省科技厅工业企业科技特派员项目资助(20130106)
辽宁省海洋与渔业厅科研项目资助(2011024)
关键词
水产养殖废水
纳米SNO2
光催化氧化
氨氮
aquaculture wastewater
nano-SnO2
photocatalytic oxidation
ammonia nitrogen
