乙烯基聚合物的好氧生物降解特性  

Biodegradation characteristics of vinyl polymer

作　　者：赵霞[1] 马建中 马宏瑞 高党鸽 孙永会[1] ZHAO Xia1 MA Jianzhong2 MA Hongrui3 GAO Dangge2 SUN Yonghui1(1. College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi＇an, 710021, China; 2. College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi＇an, 710021, China; 3. College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi＇an, 710021, Chin)

机构地区：[1]陕西科技大学化学与化工学院,西安710021 [2]陕西科技大学轻工科学与工程学院,西安710021 [3]陕西科技大学环境科学与工程学院,西安710021

出　　处：《环境化学》2018年第3期576-583,共8页Environmental Chemistry

基　　金：国家自然科学基金(21607097);陕西科技大学博士启动基金(2017BJ-24)资助~~

摘　　要：在好氧活性污泥系统生物处理乙烯基聚合物,采用COD30法,并结合TOC、生化呼吸曲线、扫描电子显微镜-能谱(SEM-EDS)、傅里叶红外光谱(FT-IR)及粒径分布研究了乙烯基聚合物的好氧生物降解特性.结果表明,经过30 d的微生物作用,初始COD浓度为100、300、500 mg·L-1的乙烯基聚合物的生物降解去除率分别为37.1%、33.4%、31.1%,乙烯基聚合物的生物降解去除率随初始浓度的增大而减小.降解动力学基本符合一级速率方程,速率常数受初始浓度影响较小.TOC、生化呼吸曲线、SEM-EDS、FT-IR及粒径变化结果进一步表明,乙烯基聚合物在好氧微生物的作用下发生了一定程度的生物降解.FT-IR结果表明乙烯基聚合物的主体结构未发生显著变化,主链上碳元素被矿化的较少.Biodegradation characteristics of vinyl polymer were investigated under aerobic condition with the activated sludge system,and the biological degradation process of vinyl polymer was analyzed by COD3 0,TOC,respiration curve,scanning electron microscopy-energy dispersive X-ray spectroscopy（ SEM-EDS）,Fourier-transformed infrared spectroscopy（ FT-IR）,and particle size distribution. The results showed that after 30 days of incubation the COD removal ratios were 37.1%,33. 4% and 31. 1% at initial vinyl polymer concentrations of 100, 300, and 500 mg·L-1,respectively,indicating that the biodegradation efficiency decreased with increasing initial substrate concentration. Kinetic studies showed that the first-order kinetic could describe the biodegradation process,and the first-order kinetic constant during aerobic biodegradation of vinyl polymer was slightly influenced by initial concentration. The biodegradability of vinyl polymer was further confirmed through TOC,respiration curve,SEM-EDS,FT-IR and particle size distribution analysis.The action of microorganisms in the activated sludge caused partial biodegradation of vinyl polymer.The changes in the FT-IR spectra indicated that the main chain scission of vinyl polymer was notdisrupted significantly. The carbon on the main chain was rarely mineralized.

关 键 词：乙烯基聚合物 生物降解 活性污泥 

分 类 号：X703[环境科学与工程—环境工程]