环境因子对三峡库区底泥污染物释放的影响研究  

IMPACT OF ENVIRONMENTAL FACTORS ON CONTAMINANTS RELEASE FROM THE SEDIMENT OF THREE GORGES RESERVOIR AREA

作　　者：雷晓玲[1,2] 韩亚鑫 冉兵[2] 杨程 

机构地区：[1]重庆市科学技术研究院,重庆401123 [2]重庆交通大学,重庆400074

出　　处：《环境工程》2016年第1期47-50,64,共5页Environmental Engineering

基　　金：国家科技支撑计划专题"三峡水库绿色航道施工技术研究"(2011BAB09B0103);重庆市科技研发基地建设计划项目"中-加三峡水域国际科技合作示范基地"(cstc2013gjhz20001)

摘　　要：通过室内静态模拟实验研究了环境因子诸如扰动、pH和溶解氧对三峡库区底泥中COD、TP、NH_3-N和TN释放的影响。结果表明,COD、TP、NH＋3-N、TN的释放量均随扰动强度的增加而增强,影响程度顺序为COD〉TP〉TN〉NH_3-N;不同pH条件下,TP、NH_3-N、TN、COD的释放量均呈U型,中性条件下释放量最小,酸性和碱性条件下释放量都较大,pH为6~8时最有利于抑制底泥中污染物的释放;不同溶解氧水平下,COD、TP、NH_3-N、TN的释放量均随溶解氧水平的降低而增加。The release of COD,TP,NH_3- N,and TN from sediment of the Three Gorges Reservoir Area was studied under different environmental factors,including disturbance,pH and DO levels by laboratory static simulation experiments. The results showed that the release rates of COD,TP,NH_3- N,TN increased with the disturbance intensity,the influence degree sequence was COD TP TN NH_3-N; with the pH value changed,TP,TN,NH_3-N,COD release rate from sediment was highest at high pH value and lowest at a neutral pH value; the release trend shaped like ＂U＂,the release of pollutants in sediment was inhibited by a pH value in 6 ~ 8; and the release rates of TP,TN,NH_3-N,COD increased as DO increased.

关 键 词：环境因子 底泥 释放速率 COD TP NH3-N TN 

分 类 号：X524[环境科学与工程—环境工程]