当前位置: 首页 > 文章 > 催化臭氧化降解水体中藻毒素及COD动力学研究 江苏大学学报(自然科学版) 2014,35 (1) 115-119
Position: Home > Articles > Dynamics of microcystin-LR and COD degradation in water by catalytic ozonation Journal of Jiangsu University (Natural Science Edition) 2014,35 (1) 115-119

催化臭氧化降解水体中藻毒素及COD动力学研究

作  者:
刘宏;黄凯;李新建;依成武;宋金德
单  位:
盐城泰克光电科技有限公司;江苏大学环境与安全工程学院
关键词:
藻毒素;催化臭氧化;降解;动力学;COD
摘  要:
采用催化臭氧化工艺处理含藻毒素污水,分别用直接代入法和微分法,研究常见金属氧化物在催化剂作用下,该工艺对污水MC-LR和COD降解的反应动力学.直接代入法研究结果表明:采用催化臭氧化工艺,MC-LR降解基本符合准二级反应动力学,COD降解基本符合准一级反应动力学.动力学微分法研究验证表明以上结论成立.温度、催化剂投加量与pH值大小等试验因素均能影响该工艺的降解速率.试验表明:温度对该工艺的影响较小,各温度下降解速率较接近;增加催化剂投加量使该工艺处理性能提高,降解速率加快;pH值对该工艺处理性能影响显著,且碱性环境对该工艺性能的抑制使降解速率显著降低.
译  名:
Dynamics of microcystin-LR and COD degradation in water by catalytic ozonation
作  者:
Liu Hong;Huang Kai;Li Xinjian;Yi Chengwu;Song Jinde;School of Environment and Safety Engineering,Jiangsu University;Yancheng Tektronix Technology Co. ,Ltd.;
关键词:
microcystin;;catalytic ozonation;;degradation;;dynamics;;COD
摘  要:
The degradation of Microcystin-LR( MC- LR) and COD was conducted by catalytic ozonation,and the reaction kinetics were investigated by direct substituting and dynamics differential methods.The results from direct substituting method indicate that the MC- LR degradation reaction fits well with second-order kinetics,while COD degradation reaction fits well with first-order kinetics. The results from dynamics differential method are consistent with the conclusions. The factors of temperature,ozone dose and pH value have influence on the degradation rate. Temperature has slight effect on the degradation rates of MC- LR and COD. Ozone dosage has significant effect on the degradation of MC- LR and COD,and the degradation rate constant is obviously increased with the increase of ozone dosage. The degradation rate is also sensitive to pH value,and the rate is quickly decreased under alkaline condition.

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