海河沉积物对邻苯二甲酸二甲酯吸附行为研究  

Adsrption of dimethyl phthalate on sediments

作　　者：黄岁樑[1] 李海涛[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071

出　　处：《环境污染与防治》2007年第5期321-324,356,共5页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No50479034);天津市自然科学基金资助项目(No05YFSZSF02100);教育部留学归国服务人员启动基金;南开大学"引进人才科研启动项目"资助

摘　　要：邻苯二甲酸二甲酯(DMP)是一种广泛使用的化工原料,也是一种环境内分泌干扰物。研究了海河沉积物和土壤对DMP的吸附解吸作用,以及颗粒物粒径、浓度和离子浓度对DMP在颗粒物上吸附的影响。研究发现DMP在土壤上的吸附符合Langmuir等温式,在海河沉积物上的吸附符合线性等温式,单位吸附量随着颗粒物浓度的增大而减小,离子浓度的增大而增大,粒径对DMP的吸附影响不明显。用DMP将海河沉积物污染并于室温老化1个月后进行解吸实验,被吸附DMP解吸速率前20h较快,以后逐渐达到吸附平衡,解吸量较小。The dimethyl phthalate （DMP） was a kind of environmental endocrine-disrupting （ED） substance, which was able to disrupt the normal functioning of endocrine system. The sorption behaviors of dimethyl phthalate onto Haihe River sediments and soil were investigated. The results showed that the sorptive behavior of dimethyl phthalate onto Haihe River sediments accorded well with the linear sorption isotherm. Sorption occurred primarily via partition function of organic carbon of sediments, whereas sorption on soil fit for Langmuir equation. An increasing in the particle water distribution coefficient with decreasing particle concentration was observed. Sorption of dimethyl phthalate was found to enhance in the presence of salts, and sorption coefficient of dimethyl phthalate increased with increasing salinities.

关 键 词：邻苯二甲酸二甲酯 环境内分泌干扰物 解吸 沉积物 固体浓度效应 

分 类 号：X132[环境科学与工程—环境科学]