Temporal and spatial variation, input fluxes and risk assessment of cyclic methylsiloxanes in Rivers-Bohai Sea System
文献类型：期刊论文
| 作者 | Liu, Nannan; Zhao, Xuesheng; Xu, Lin ; Cai, Yaqi
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| 刊名 | ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
 |
| 出版日期 | 2022-02 |
| 卷号 | 231期号:0页码:113169 |
| 关键词 | VOLATILE METHYL SILOXANES LINEAR SILOXANES CORE SEDIMENTS WATER SURFACE PROFILES TOXICITY PRODUCTS EXPOSURE CHINA |
| ISSN号 | 0147-6513 |
| 英文摘要 | In the present study, the total concentrations of three cyclic methylsiloxanes (sigma CMSs), including octame-thylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5) and dodecamethylcyclohexasiloxane (D6), in surface water and sediment samples of five main rivers draining into the Bohai Sea were in the range of 1.62-1.39 x 10(3) ng/L and 1.92-1.69 x 10(3) ng/g dw, respectively. Riverine input had great influence on the coastal distribution of siloxanes in the Bohai Sea. The concentrations of sigma CMSs in coastal sediments farthest away (40-50 Km) from the estuaries were only 4-33% of those close to the estuaries. But surprisingly, compared with those in coastal sediments (1.03-1.44 x 10(3) ng/g dw), the concentrations of CMSs (1.56-2.67 x 10(3) ng/g dw) in some deep-sea sediments were higher, and certain positive correlation existed between sediment sigma CMSs in this area with the total petroleum hydrocarbons concentration (R-2 = 0.92, p < 0.05) suggested offshore oil exploitation as one important emission source of siloxanes. Overall, calculated based on their sediment concentrations, D4-D6 had negligible ecological risks to the benthic organisms in river-Bohai Sea system, i.e. HQs < 1. However, sediment-accumulation of siloxanes should be paid attention, especially for some deep-sea sediments nearby drilling platforms, where it will take only less than 1 year for D4 to reach its threshold. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47625]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 通讯作者 | Xu, Lin |
| 作者单位 | 1.UCAS, Hangzhou Inst Adv Study, Sch Environm, Hangzhou 330106, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Joint Res Ctr Protect Infrastruct Technol & Envir, Tianjin 300384, Peoples R China 4.Tianjin Chengjian Univ, Sch Environm & Municipal Engn, Tianjin 300384, Peoples R China 5.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Nannan,Zhao, Xuesheng,Xu, Lin,et al. Temporal and spatial variation, input fluxes and risk assessment of cyclic methylsiloxanes in Rivers-Bohai Sea System[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2022,231(0):113169. |
| APA | Liu, Nannan,Zhao, Xuesheng,Xu, Lin,&Cai, Yaqi.(2022).Temporal and spatial variation, input fluxes and risk assessment of cyclic methylsiloxanes in Rivers-Bohai Sea System.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,231(0),113169. |
| MLA | Liu, Nannan,et al."Temporal and spatial variation, input fluxes and risk assessment of cyclic methylsiloxanes in Rivers-Bohai Sea System".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 231.0(2022):113169. |
入库方式： OAI收割
来源：生态环境研究中心
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