Fenton降解涂装废水的因素影响及动力学分析  

Influencing factors and kinetic analysis of Fenton degradation of painting wastewater

作　　者：袁怡 翟晶晶 卜志威 陈惟潇 谢怡漪 YUAN Yi;ZHAI Jingjing;BU Zhiwei;CHEN Weixiao;XIE Yiyi(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Collaborative Innovation Center of Water Treatment and Materials,Suzhou 215009,China;National and Local Joint Engineering Laboratory of Urban Domestic Sewage Resource Utilization Technology,Suzhou 215009,China;Suzhou Environmental Protection Co.Ltd,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]江苏省水处理技术与材料协同创新中心,苏州215009 [3]城市生活污水资源化利用技术国家地方联合工程实验室,苏州215009 [4]苏州市环境保护有限公司,苏州215009

出　　处：《环境工程学报》2022年第10期3221-3231,共11页Chinese Journal of Environmental Engineering

基　　金：“十三五”水专项“苏州区域水质提升与水生态安全保障技术及综合示范项目”(2017ZX07205);苏州市分离净化材料与技术重点实验室项目(SZS201512)。

摘　　要：以江苏某电动自行车制造企业的涂装废水为研究对象,采用单因素和响应面优化Fenton氧化处理的反应条件,分析了其动力学过程。结果表明:在pH=3.21、n(H_(2)O_(2)/Fe^(2+))=8∶1、m(H_(2)O_(2)/COD)=4.17∶1、氧化反应时间为120 min的条件下,COD和TP的去除率均达到最高,分别为81.32%和98%,其降解过程符合一级反应动力学,室温下降解速率常数k为0.0142 min^(−1),活化能为4.76 kJ·mol^(−1)。在pH=3.21、n(H_(2)O_(2)/Fe^(2+))=8∶1、m(H_(2)O_(2)/COD)=0.78∶1、反应时间120 min的条件下,Fenton半氧化体系对COD去除率可达42.5%左右,处理后废水的B/C比由0.12提高至0.35。综合经济因素,认为Fenton半氧化与生物处理工艺耦合处理实际涂装废水更佳。The painting wastewater of an electric bike manufacturing enterprise in Jiangsu was taken as the research object,single factor and response curve tests were conducted to optimize the Fenton oxidation conditions,and the corresponding kinetics of this process was also analyzed.The results show that when pH was 3.21,the molar ratio of H_(2)O_(2) to Fe^(2+)was 8∶1 and the mass ratio of H_(2)O_(2) to COD was 4.17∶1,the removal rates of COD and TP could reach their own highest values of 81.32%and 98%after 120 min Fenton oxidation,respectively.The degradation process accorded with the first-order reaction kinetics,the degradation coefficient k and the activation energy were 0.0142 min^(−1) and 4.76 kJ·mol^(−1) at room temperature,respectively.Under the conditions of pH 3.21,n(H_(2)O_(2)/Fe^(2+))of 8∶1,m(H_(2)O_(2)/COD)of 0.78:1,the Fenton semi-oxidation reaction system could remove about 42.5%of COD within 120 min,and the B/C ratio of the treated wastewater increased from 0.12 to 0.35.Considering the economic factors,it is better to recommend the coupled process of Fenton semioxidation and biological treatment to treat the actual painting wastewater.

关 键 词：FENTON氧化 涂装废水 响应曲面法 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]