Predicting organic contaminant concentrations in sediment porewater using solid-phase microextraction
文献类型：期刊论文
| 作者 | Yang, Ze-Yu; Zeng, Eddy Y.; Maruya, Keith A.; Mai, Bi-Xian; Ran, Yong |
| 刊名 | Chemosphere
 |
| 出版日期 | 2007 |
| 卷号 | 66期号:8页码:1408-1414 |
| 关键词 | Sediment porewater Solid-phase microextraction Minimum sediment volume Dissolved phase hoc concentration |
| ISSN号 | 0045-6535 |
| DOI | 10.1016/j.chemosphere.2006.09.050 |
| 通讯作者 | Zeng, eddy y.(eddyzeng@gig.ac.cn) |
| 英文摘要 | Because of its cost and time saving features, solid-phase microextraction (spme) is a leading candidate as a biomimic technique in assessing the bioavailable fraction of hydrophobic organic contaminants (hocs) in sediment porewater. however, no predictive modeling framework in which to systematically address the effect of key parameters on spme performance for this application exists. in this study, we derived two governing equations to predict (1) the minimum sediment volume (v(s)(min)) required to achieve non-depletive conditions, and (2) dissolved phase hoc porewater concentrations (c(pw)) as functions of hoc- and sediment specific characteristics in a conceptual three compartment system. the resulting model predicted that v(s)(min) was independent of hoc concentrations both in sediment and porewater, but did vary with hydrophobicity (characterized by logk(ow)), the fraction of sediment porewater (f(pw)), and s reached plateaus) the volume (v(f)) of the spme sorbent phase. moreover, the effects of these parameters were minimized (i.e., vas log k(ow) approached 4-5. model predictions of c(pw), a surrogate for spme-based detection limits in porewater, decreased with increasing sediment volume (v(s)) at low v(s) values, but rapidly leveled off as v(s) increased. a third result suggested that the sediment hoc concentration required for spme is completely independent of k(ow). these results suggest that relatively small sediment volumes participate in exchange equilibria among sediment, porewater and the spme fiber, and that large sediment hoc reservoirs are not needed to improve the detection sensitivity of spme-based porewater samplers. the ultimate utility of this modeling framework will be to assist future experimental designs and help predict in situ bioavailability of sediment-associated hocs. (c) 2006 elsevier ltd. all rights reserved. |
| WOS关键词 | POLYCYCLIC AROMATIC-HYDROCARBONS ; SEMIPERMEABLE-MEMBRANE DEVICES ; BIOMIMETIC EXTRACTION ; PASSIVE SAMPLERS ; BIOAVAILABILITY ; SOIL ; POLLUTANTS ; CHEMICALS ; AVAILABILITY ; LIMITATIONS |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000244166500004 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2380130 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zeng, Eddy Y. |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Goechem, Guangzhou 510640, Peoples R China 2.So Calif Coastal Water Res Project, Westminster, CA 92683 USA 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Ze-Yu,Zeng, Eddy Y.,Maruya, Keith A.,et al. Predicting organic contaminant concentrations in sediment porewater using solid-phase microextraction[J]. Chemosphere,2007,66(8):1408-1414. |
| APA | Yang, Ze-Yu,Zeng, Eddy Y.,Maruya, Keith A.,Mai, Bi-Xian,&Ran, Yong.(2007).Predicting organic contaminant concentrations in sediment porewater using solid-phase microextraction.Chemosphere,66(8),1408-1414. |
| MLA | Yang, Ze-Yu,et al."Predicting organic contaminant concentrations in sediment porewater using solid-phase microextraction".Chemosphere 66.8(2007):1408-1414. |
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来源：中国科学院大学
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