摘要
将一种新型被动式采样器——三油酸甘油酯-醋酸纤维素复合膜(TECAMs)暴露于10种人工老化土壤中富集萘、菲、芘和苯并[a]芘4种多环芳烃(PAHs),并与土壤模型动物——赤子爱胜蚓(Eiseniafoetida)进行比较以研究该采样器用于评价土壤中多环芳烃生物可利用性的可能性.研究结果表明,TECAMs能有效富集土壤中萘、菲、芘和苯并[a]芘,并在48h内基本达到平衡,远快于赤子爱胜蚓的21d平衡时间.TECAMs内PAHs含量与土壤溶解有机碳(DOC)含量呈正相关(p<0.05),而与土壤中总有机质(TOM)含量呈负相关(p<0.05),土壤pH对TECAMs富集PAHs的影响不显著(p<0.05).TECAMs内PAHs含量与土壤中PAHs含量、赤子爱胜蚓体内PAHs含量均呈显著线性正相关(p<0.05,p<0.01).研究结果表明TECAMs有可能应用于评价土壤中PAHs的生物可利用性.
A new type of passive sample device, triolein embedded cellulose acetate membrane（TECAM）, was exposed to biomimetically accumulate the polyaromatic hydrocarbons（PAHs）naphthalene, phenanthrene, pyrene and benz[a]pyrene from 10 spiked soils. The accumulation of PAHs by TECAMs and earthworms（Eisenia foetida）was compared in order to evaluate the bioavailability of PAHs in soils. All the four PAHs almost reached equilibrium accumulation in TECAMs within 48h, which was much quicker than the time of 21d for the earthworms. The quantities of the PAHs accumulated by the TECAMs and the earthworms were both positively and linearly related to their concentrations in soils. PAHs accumulated by the TECAM was positively related to the content of dissolved organic carbon（DOC）and negatively related to content of total organic matter （TOM）in soils, but soil pH had little influence on the accumulation of PAHs by the TECAMs. A good linear relationship was observed between TECAM-accumulated PAHs and PAHs accumulated by earthworms, which indicates that TECAM devices may have potential use as a surrogate to predict the bioavailability of PAHs in soils.
出处
《生态毒理学报》
CAS
CSCD
2007年第3期284-291,共8页
Asian Journal of Ecotoxicology
基金
中国科学院方向项目(No.KZCX3-SW-431)
