2,5-二氟硝基苯的厌氧降解特性  

Anaerobic biodegradation characteristics of 2,5-difluoronitrobenzene

作　　者：沈晓莉[1] 赵芝清[1,2] 范蕊[1] 江建国 徐天有[1] 

机构地区：[1]衢州学院化学与材料工程学院,浙江衢州324000 [2]浙江大学环境与资源学院,浙江杭州310058 [3]江山市环保局,浙江江山324100

出　　处：《化工环保》2017年第3期320-324,共5页Environmental Protection of Chemical Industry

基　　金：衢州市科技局项目(2015Y010;2015Y012);衢州学院中青年学术骨干项目(XNZQN201505;XNZQN201506);衢州学院科研启动经费项目(BSJX201601)

摘　　要：考察了2,5-二氟硝基苯(2,5-DFNB)的厌氧降解特性及F^-对其厌氧降解过程的影响。实验结果表明:当初始2,5-DFNB质量浓度为5~100 mg/L时,随着降解时间的延长,2,5-DFNB对厌氧消化产甲烷的抑制效应逐渐减弱直至消失;在厌氧降解过程中,2,5-DFNB的降解基本无延滞期,但仅发生了硝基转化,并未实现还原脱氟;2,5-DFNB的厌氧降解动力学符合Andrews模型,最大比降解速率、底物饱和常数、底物抑制常数分别为5.9 mg/(g·h),67.7 mg/L,1 299.6 mg/L;质量浓度为10~80 mg/L的F^-对2,5-DFNB厌氧降解过程影响甚小,而质量浓度大于100 mg/L时则产生了较严重的抑制作用。The anaerobic biodegradation characteristics of 2, 5-difluoronitrobenze （2, 5-DFNB） and the effect of F on the process were researched. The experimental results showed that： When the initial mass concentration of 2, 5-DFNB was 5-100 mg/L, the inhibiting effect of 2, 5-DFNB on methanogenesis was decreased gradually and disappeared finally with the extending of degradation time; During acclimation, 2, 5-DFNB could transform into corresponding fluoroaniline without any lag, but not reductive defluorination; The degradation kinetic data fitted the Andrews model well with 5.9 mg/（g· h）of maximum specific degradation rate, 67.7 mg/L of substrate saturation constant and 1 299.6 mg/L of substrate inhibition constant; The inhibiting effect of F^- with 10-80 mg/L of 2, 5-DFNB mass concentration on the anaerobic biodegradation process was small, but that with over 100 mg/L was great.

关 键 词：厌氧生物处理 2 5-二氟硝基苯 产甲烷作用 生物降解 F^- 

分 类 号：X703.1[环境科学与工程—环境工程]