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Bound PAHs in Sediment and Related Environmental Significance
Jian-yang Guo;  Jing-an Chen;  Jing-fu Wang;  Feng-chang Wu
2017
Source PublicationArchives of Environmental Contamination and Toxicology
Volume72Issue:4Pages:530-539
Abstract

Extractable polycyclic aromatic hydrocarbons (EPAHs) and bound PAHs (BPAHs) were measured in a sediment core using conventional Soxhlet extraction and a more astringent extraction method, with the objectives of determining the influence of BPAHs on the historical reconstruction of PAHs and exploring the formation of BPAHs and long-term behaviors of PAHs in sediment. The results indicated that the formation of BPAHs was clearly sediment-depth and molecular-size dependent. BPAHs represents an important portion of PAHs in sediment and cannot be extracted by conventional Soxhlet extraction. This suggests that the previously developed vertical profile of PAHs is not the real chronology of PAHs and the plausible interpretation derived from the sedimentary records of PAHs needs reexamination. Based on the previous findings, a biphase model was proposed and the formation of BPAHs was predicted. Due to the different nature of geosorbents in sediment, redistribution of PAHs among these geosorbents logically leads to the formation of BPAHs and is kinetically favorable for smaller molecular PAHs. This is consistent with the obtained results. Many factors may influence the formation of BPAHs, such as the physicochemical structure of sediment and environmental conditions. There is still a long way to reveal the thermodynamical characteristics in action during the formation of BPAHs.

KeywordPolycyclic Aromatic-hydrocarbons Microwave-assisted Extraction Soot-like Materials Polychlorinated-biphenyls Source Apportionment Pesticide-residues Soxhlet Extraction Organic-compounds Southwest China Northeast China
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/7763
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
First Author Affilication中国科学院地球化学研究所
Corresponding Author Affilication中国科学院地球化学研究所
Recommended Citation
GB/T 7714
Jian-yang Guo;Jing-an Chen;Jing-fu Wang;Feng-chang Wu. Bound PAHs in Sediment and Related Environmental Significance[J]. Archives of Environmental Contamination and Toxicology,2017,72(4):530-539.
APA Jian-yang Guo;Jing-an Chen;Jing-fu Wang;Feng-chang Wu.(2017).Bound PAHs in Sediment and Related Environmental Significance.Archives of Environmental Contamination and Toxicology,72(4),530-539.
MLA Jian-yang Guo;Jing-an Chen;Jing-fu Wang;Feng-chang Wu."Bound PAHs in Sediment and Related Environmental Significance".Archives of Environmental Contamination and Toxicology 72.4(2017):530-539.
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