Fe^(2+)对辽河沉积物中DDT、HCB缺氧生物降解影响研究  

Research on effects of Fe^(2+) on anaerobic biodegradation of DDT and HCB in sediment of the Liao River

作　　者：王帅杰[1] 全燮[1] 赵慧敏[1] 陈景文[1] 薛大明[1] 

机构地区：[1]大连理工大学环境科学与工程学院,辽宁大连116012

出　　处：《大连理工大学学报》2002年第2期181-184,共4页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目 (2 97770 0 2 );辽宁省自然科学基金资助项目 (9810 60 0 10 1);教育部重点基金资助项目(0 0 2 8

摘　　要：测定了 Fe SO4 .7H2 O对辽河沉积物中滴滴涕 (DDT)、六氯苯 (HCB)缺氧生物降解的影响 .在无外加碳源的情况下 ,Fe SO4 .7H2 O对辽河沉积物中 DDT和 HCB的缺氧生物降解起抑制作用 .外加 Fe SO4 .7H2 O时 DDT、HCB的缺氧降解动力学常数 KDDT =0 .0 1 70 d- 1 ,KHCB=0 .0 0 69d- 1 ,均分别小于无外加 Fe SO4 .7H2 O时的 0 .0 2 1 3 d- 1 和 0 .0 0 77d- 1 .在有外加碳源葡萄糖或乙酸钠时 ,Fe SO4 .7H2 O对辽河沉积物中 DDT的缺氧生物降解起到了明显的促进作用 ;外加 Fe SO4 .7H2 O时 DDT的缺氧降解动力学常数 K葡萄糖 ,DDT=0 .0 3 89d- 1 ,K乙酸钠 ,DDT =0 .0 3 2 7d- 1 ,均分别大于无外加 Fe SO4 .7H2 O时的 0 .0 2 5 6d- 1和 0 .0 2 69d- 1 .但 Fe SO4 .7H2 O对 HCB在辽河沉积物中缺氧生物降解的影响则不大 。The effects of FeSO 4·7H 2O on the anaerobic biodegradation of 2,2 bis( p chlorophenyl) 1,1,1 trichlorothane (DDT) and hexachlorobenzene (HCB) in sediment of the Liao River were determined. Without the additional carbon sources, FeSO 4·7H 2O restrains the anaerobic biodegradation of DDT and HCB (K DDT, FeSO 4·7H 2O =0.017 0 d -1 < K DDT =0.021 3 d -1 , K HCB,FeSO 4·7H 2O =0.006 9 d -1 < K HCB =0.007 7 d -1 , K is the kinetic constant of anaerobic biodegradation). With the addition of glucose and sodium acetate, FeSO 4·7H 2O promotes the anaerobic biodegradation of DDT obviously in sediment of the Liao River ( K glucose,DDT, FeSO 4·7H 2O = 0.038 9 d -1 > K glucose,DDT =0.025 6 d -1 , K sodium acetate, DDT, FeSO 4·7H 2O =0.032 7 d -1 > K sodium acetate,DDT = 0.026 9 d -1 ). But the effect of FeSO 4·7H 2O on HCB′s biodegradation is not obvious, which is relevant to the molecular structure of HCB.

关 键 词：滴滴涕 六氯苯 缺氧生物降解 FeSO4·7H2O 亚铁离子 辽河沉积物 有机氯农药 环境污染 

分 类 号：X592[环境科学与工程—环境工程] X172