Pollution status of PAHs in surface sediments from different marginal seas along China Mainland: A quantitative evaluation on a national scale

China is one of the largest coastal countries in the world, which have all kinds of marginal systems. Studies have reported the sedimentary Polycyclic aromatic hydrocarbons (PAHs) pollution status, including their concentrations, sources and risks, in localized marginal systems, which showed signifi...

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Veröffentlicht in:Environmental pollution (1987) 2020-08, Vol.263 (Pt B), p.114431-114431, Article 114431
Hauptverfasser: Yang, Wei, Zhang, Huashuang, Lang, Yinhai, Li, Zhengyan
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container_end_page 114431
container_issue Pt B
container_start_page 114431
container_title Environmental pollution (1987)
container_volume 263
creator Yang, Wei
Zhang, Huashuang
Lang, Yinhai
Li, Zhengyan
description China is one of the largest coastal countries in the world, which have all kinds of marginal systems. Studies have reported the sedimentary Polycyclic aromatic hydrocarbons (PAHs) pollution status, including their concentrations, sources and risks, in localized marginal systems, which showed significant differences. Thus, a comprehensive understanding of their pollution in marginal systems along China Mainland is urgently needed on a national scale. In the present study, the concentrations of 16 priority PAHs in surface sediments from 62 different marginal systems along China Mainland were reviewed. Their sources were identified and apportioned, and the health risks and ecological risks were also evaluated. As a result, the total sedimentary PAHs varied in a wide range of 4–3700 ng/g, with the lowest values observed in Kenting National Park in East China Sea and the highest values observed in Daliao River estuary in Bohai Sea. Their concentrations suggested that they were not contaminated-weakly contaminated in most study areas, but were contaminated-heavily contaminated in some pollution hot-spots. Source identification and apportion suggested that the sedimentary PAHs were mainly originated from coal combustion, vehicular emission, natural gas combustion and petrogenic source, but the coal combustion and vehicular emission contributed most to their emission (>90%). Risk assessment suggested that the carcinogenic risks were lower than the upper limit of the acceptable range (10−4), which were acceptable at a large spatial scale. However, for sediments from Qinhuangdao coastal wetland, Daliao River estuary and Yangpu Bay, their carcinogenic risks were higher than 10−4, which will pose high carcinogenic risks for adults. The non-carcinogenic risks were acceptable in all marginal systems with values lower than the safety guideline (90%.•Carcinogenic and ecological risks in pollution hot-spots were higher than guidelines. This paper reported the pollution status of the sedimentary PAHs in marginal systems
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Studies have reported the sedimentary Polycyclic aromatic hydrocarbons (PAHs) pollution status, including their concentrations, sources and risks, in localized marginal systems, which showed significant differences. Thus, a comprehensive understanding of their pollution in marginal systems along China Mainland is urgently needed on a national scale. In the present study, the concentrations of 16 priority PAHs in surface sediments from 62 different marginal systems along China Mainland were reviewed. Their sources were identified and apportioned, and the health risks and ecological risks were also evaluated. As a result, the total sedimentary PAHs varied in a wide range of 4–3700 ng/g, with the lowest values observed in Kenting National Park in East China Sea and the highest values observed in Daliao River estuary in Bohai Sea. Their concentrations suggested that they were not contaminated-weakly contaminated in most study areas, but were contaminated-heavily contaminated in some pollution hot-spots. Source identification and apportion suggested that the sedimentary PAHs were mainly originated from coal combustion, vehicular emission, natural gas combustion and petrogenic source, but the coal combustion and vehicular emission contributed most to their emission (&gt;90%). Risk assessment suggested that the carcinogenic risks were lower than the upper limit of the acceptable range (10−4), which were acceptable at a large spatial scale. However, for sediments from Qinhuangdao coastal wetland, Daliao River estuary and Yangpu Bay, their carcinogenic risks were higher than 10−4, which will pose high carcinogenic risks for adults. The non-carcinogenic risks were acceptable in all marginal systems with values lower than the safety guideline (&lt;1). In the ecological risk assessment, their concentrations in some pollution hot-spots were higher than the safety guidelines (effects range low, ERL), suggesting a higher potential ecological risk. [Display omitted] •National-scale contaminations of 16 PAHs in different marginal systems were reviewed.•PAHs in Bohai Sea and Yellow Sea were higher than East and South China Sea.•Coal combustion and vehicular emission were the main sources with contributions &gt;90%.•Carcinogenic and ecological risks in pollution hot-spots were higher than guidelines. 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Studies have reported the sedimentary Polycyclic aromatic hydrocarbons (PAHs) pollution status, including their concentrations, sources and risks, in localized marginal systems, which showed significant differences. Thus, a comprehensive understanding of their pollution in marginal systems along China Mainland is urgently needed on a national scale. In the present study, the concentrations of 16 priority PAHs in surface sediments from 62 different marginal systems along China Mainland were reviewed. Their sources were identified and apportioned, and the health risks and ecological risks were also evaluated. As a result, the total sedimentary PAHs varied in a wide range of 4–3700 ng/g, with the lowest values observed in Kenting National Park in East China Sea and the highest values observed in Daliao River estuary in Bohai Sea. Their concentrations suggested that they were not contaminated-weakly contaminated in most study areas, but were contaminated-heavily contaminated in some pollution hot-spots. Source identification and apportion suggested that the sedimentary PAHs were mainly originated from coal combustion, vehicular emission, natural gas combustion and petrogenic source, but the coal combustion and vehicular emission contributed most to their emission (&gt;90%). Risk assessment suggested that the carcinogenic risks were lower than the upper limit of the acceptable range (10−4), which were acceptable at a large spatial scale. However, for sediments from Qinhuangdao coastal wetland, Daliao River estuary and Yangpu Bay, their carcinogenic risks were higher than 10−4, which will pose high carcinogenic risks for adults. The non-carcinogenic risks were acceptable in all marginal systems with values lower than the safety guideline (&lt;1). In the ecological risk assessment, their concentrations in some pollution hot-spots were higher than the safety guidelines (effects range low, ERL), suggesting a higher potential ecological risk. [Display omitted] •National-scale contaminations of 16 PAHs in different marginal systems were reviewed.•PAHs in Bohai Sea and Yellow Sea were higher than East and South China Sea.•Coal combustion and vehicular emission were the main sources with contributions &gt;90%.•Carcinogenic and ecological risks in pollution hot-spots were higher than guidelines. 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Their concentrations suggested that they were not contaminated-weakly contaminated in most study areas, but were contaminated-heavily contaminated in some pollution hot-spots. Source identification and apportion suggested that the sedimentary PAHs were mainly originated from coal combustion, vehicular emission, natural gas combustion and petrogenic source, but the coal combustion and vehicular emission contributed most to their emission (&gt;90%). Risk assessment suggested that the carcinogenic risks were lower than the upper limit of the acceptable range (10−4), which were acceptable at a large spatial scale. However, for sediments from Qinhuangdao coastal wetland, Daliao River estuary and Yangpu Bay, their carcinogenic risks were higher than 10−4, which will pose high carcinogenic risks for adults. The non-carcinogenic risks were acceptable in all marginal systems with values lower than the safety guideline (&lt;1). In the ecological risk assessment, their concentrations in some pollution hot-spots were higher than the safety guidelines (effects range low, ERL), suggesting a higher potential ecological risk. [Display omitted] •National-scale contaminations of 16 PAHs in different marginal systems were reviewed.•PAHs in Bohai Sea and Yellow Sea were higher than East and South China Sea.•Coal combustion and vehicular emission were the main sources with contributions &gt;90%.•Carcinogenic and ecological risks in pollution hot-spots were higher than guidelines. This paper reported the pollution status of the sedimentary PAHs in marginal systems along China Mainland and quantified their sources and risks.</abstract><cop>OXFORD</cop><pub>Elsevier Ltd</pub><pmid>32251980</pmid><doi>10.1016/j.envpol.2020.114431</doi><tpages>11</tpages></addata></record>
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subjects Environmental Sciences
Environmental Sciences & Ecology
Life Sciences & Biomedicine
Marginal sea
National scale
Polycyclic aromatic hydrocarbons (PAHs)
Risk assessment
Science & Technology
Source
title Pollution status of PAHs in surface sediments from different marginal seas along China Mainland: A quantitative evaluation on a national scale
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