海洋微塑料中重金属污染的分布——以阿联酋迪拜为例
Mapping of heavy metal contamination associated with microplastics marine debris - A case study: Dubai, UAE.
机构信息
College of Arts Sciences and Information Technology, University of Khorfakkan, United Arab Emirates.
Department of Civil Engineering, American University of Sharjah, United Arab Emirates.
出版信息
Sci Total Environ. 2023 Sep 15;891:164370. doi: 10.1016/j.scitotenv.2023.164370. Epub 2023 May 24.
Microplastics (MPs) are ubiquitously detected in the environment. The adverse impact of microplastics on marine life is well documented. Previous research has shown that MPs can adsorb heavy metals, however, this fact has not been investigated along the coast of Dubai, UAE. Elemental composition of MPs debris was determined using X-ray fluorescence spectroscopic (XRF) analysis. The analyzed MPs were extracted from 80 sediment samples collected from the wrack lines of 16 Dubai, UAE beaches. A total of 480 MPs pieces extracted from the samples were analyzed in order to detect heavy metals. The polymer composition was previously confirmed by FTIR spectroscopy, showing that polyethylene (PE) and polypropylene (PP) were the most abundant MPs. 14 heavy metals were identified in the samples: Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Pb, Ce, Pr, Nd, Pd, and Co with different concentrations. Five of them (Cr, Ni, Cu, Zn, and Pb) are priority pollutants according to EPA. Their average concentrations in oxide form were CrO (2.96 %), NiO (0.32 %), CuO (0.45 %), ZnO (0.56 %), and PbO (1.49 %).
微塑料（MPs）广泛存在于环境中。微塑料对海洋生物的不良影响已有大量文献记载。先前的研究表明，MPs 可以吸附重金属，但这一事实尚未在阿联酋迪拜沿海地区进行调查。使用 X 射线荧光光谱（XRF）分析确定 MPs 碎片的元素组成。对从阿联酋迪拜 16 个海滩的碎屑线收集的 80 个沉积物样本中提取的 MPs 进行了分析。从这些样本中总共提取了 480 个 MPs 碎片进行重金属检测。聚合物组成先前通过傅里叶变换红外光谱（FTIR）分析得到确认，表明聚乙烯（PE）和聚丙烯（PP）是最丰富的 MPs。在样品中发现了 14 种重金属：Ti、V、Cr、Mn、Fe、Ni、Cu、Zn、Pb、Ce、Pr、Nd、Pd 和 Co，浓度不同。其中 5 种（Cr、Ni、Cu、Zn 和 Pb）根据 EPA 是优先污染物。它们在氧化物形式中的平均浓度为 CrO（2.96%）、NiO（0.32%）、CuO（0.45%）、ZnO（0.56%）和 PbO（1.49%）。
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