Sorption of 17伪-ethinyl estradiol, bisphenol A and phenanthrene to different size fractions of soil and sediment

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• 作者：Ke Sun^a ; ^{sunke@bnu.edu.cn} ; Jie Jin^a ; Bo Gao^b ; Zheyun Zhang^a ; Ziying Wang^a ; Zezhen Pan^a ; Dongyu Xu^a ; Ye Zhao^a
• 关键词：Size fractions ; 17伪-Ethinyl estradiol (EE2) ; Bisphenol A (BPA) ; Soil and sediment ; Sorption
• 刊名：Chemosphere
• 出版年：2012
• 期刊代码：15_00456535
• 类别：env
• 出版时间：July, 2012
• 卷：88
• 期：5
• 页码：577-583
• 文件大小：318 K

摘要

The potential for negative effects caused by endocrine disrupting chemicals (EDCs) release into the environment is a prominent concern and numerous research projects have investigated possible environmental fate and toxicity. However, their sorption behavior by size fractions of soil and sediment has not been systematically represented. The sorption of bisphenol A (BPA), 17伪-ethinyl estradiol (EE2) and phenanthrene (Phen) by different size fractions of soil and sediment were investigated. Sorption isotherms of EE2, BPA, and Phen by size fractions of soil (SL) and sediment (ST) were well fitted to the Freundlich model. The positive correlation between EE2, BPA and Phen sorption capacity (log K_d) of size fractions and their organic carbon (OC) content suggests that OC of size fractions in SL and ST should regulate sorption, while the surface area (SA) of size fractions may not account for sorption of EE2, BPA and Phen. Each size fraction of ST had higher sorption capacity (K_d or K_OC) of EE2 and BPA than that of SL due to their difference in the polarity of organic matter (OM) between terrestrial and aquatic sources. Sorption capacity logK_d for size fractions of SL and ST did not follow the order: clay > silt > sand due to the difference in OM abundance and composition between the size fractions. Large particle fractions of ST contributed about 80%to the overall sorption for any EE2, BPA, and Phen. This study was significant to evaluate size fractions of soil and sediment as well as their associated OM affecting EE2 and BPA sorption processes.