Occurrence and Composition of Microplastics in the Seabed Sediments of the Coral Communities in Proximity of a Metropolitan Area.
Occurrence and Composition of Microplastics in the Seabed Sediments of the Coral Communities in Proximity of a Metropolitan Area.
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DOI：
10.3390/ijerph15102270
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发表时间：
2018-10-16
影响因子：
--
通讯作者：
Fok L
中科院分区：
文献类型：
--
作者：
Cheang CC;Ma Y;Fok L
在海洋环境中，微塑料已成为过去十年科学研究的焦点，因为这种污染物对海洋环境构成全球威胁。由于人类活动导致海洋环境恶化，香港的珊瑚正受到威胁。本研究调查香港珊瑚群落附近海床沉积物中微塑料碎屑（0.3-5毫米）的出现率、丰度和组成。本研究在香港东北及东岸沿着的四个研究地点收集了二十四个底栖沉积物样本。微塑料浓度范围为169 ± 48至221 ± 45个/千克，海底沉积物中微塑料的平均浓度为189 ± 50个/千克，与其他区域的类似研究相当。使用40倍光学显微镜从底栖沉积物样品中提取的颗粒中，微塑料占95.4%。ATR-FTIR光谱分析表明，聚乙烯（PE）和聚对苯二甲酸乙二醇酯（PET）构成了大多数聚合物类型，分别占45.3%和29.3%。海底沉积物中由PE和PET制成的微塑料比例明显高于当地海滩沉积物中观察到的比例。海底沉积物中由聚乙烯和低密度聚乙烯（LDPE）和聚丙烯（PP）共同制成的微塑料比例远远高于PET和聚氯乙烯（PVC）。结果提供了参考的微塑料的环境浓度为边缘礁栖息地靠近城市地区，可应用于微塑料的生态毒性的研究。
In marine environments, microplastics have become a focus in scientific research in the last decade due to the global threat this pollutant poses to the marine environment. Corals in Hong Kong are under threat due to the degradation of the marine environment caused by human activities. This study investigated the occurrence, abundance and composition of microplastic debris (0.3–5 mm) in seabed sediments adjacent to coral communities in Hong Kong. Twenty-four benthic sediment samples were collected from four study sites located along the northeastern and eastern shores of Hong Kong. Microplastic concentrations ranged from 169 ± 48 to 221 ± 45 items/kg, and the mean concentration of microplastics in the seabed sediments was 189 ± 50 items/kg, which was comparable to similar studies in other regions. Microplastics accounted for 95.4% of particles extracted from benthic sediment samples using 40× light microscopy. ATR-FTIR spectroscopy analysis showed that polyethylene (PE) and polyethylene terephthalate (PET) comprised the majority of polymer types, contributing 45.3% and 29.3%, respectively. The proportion of microplastics made from PE and PET in seabed sediments was significantly higher than that observed in local beach sediments. The proportion of microplastics made from PE and low-density polyethylene (LDPE) and polypropylene (PP) together in the seabed sediments was much higher than that of PET and polyvinyl chloride (PVC). The results have provided information with reference to environmental concentrations of microplastics for fringe reef habitat close to urban areas, which can be applied in studies concerning ecotoxicity of microplastics.
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影响因子：
3.3
作者：
Doyle, Miriam J.;Watson, William;Sheavly, Seba B.
通讯作者：
Sheavly, Seba B.
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3.3
作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
12.8
作者：
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通讯作者：
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影响因子：
8.9
作者：
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通讯作者：
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