杨凤林
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小分子有机碳源对滴滴涕污染沉积物生物修复作用的基础研究
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Indexed by:期刊论文

Date of Publication:2002-01-26

Journal:环境科学学报

Included Journals:PKU、ISTIC、CSCD

Volume:22

Issue:1

Page Number:51-55

ISSN No.:0253-2468

Key Words:DDT 缺氧 还原脱氯 沉积物 生物修复

Abstract:考察了辽河沉积物中p,p'-DDT在无外加碳源和外加乳酸钠或丙酸钠情况下的缺氧生物降解行为、降解过程中体系的pH变化,并测定了p,p'-DDT的主要缺氧降解产物及其浓度变化.结果发现,p,p'-DDT的缺氧脱氯行为符合准一级反应动力学;无外加碳源,DDT的缺氧脱氯降解有近一个月的滞后期,降解速率为k(无碳源)=0 0082d-1;而外加碳源物质,大大缩短了DDT缺氧脱氯降解的滞后,降解速率分别为k(乳酸钠)=0 0917d-1,k(丙酸钠)=0.1023d-1.而且,p,p'-DDT的缺氧还原脱氯行为主要发生在体系中pH上升的阶段.p,p'-DDT缺氧生物降解的主要产物是p,p'-DDD,并有少量的p,p'-DDE产生;p,p'-DDD在后期有降解.

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Gender:Male

Alma Mater:大连工学院

Degree:Master's Degree

School/Department:环境学院

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