Tang Li, Feng Jing-Chun, Li Canrong, Liang Jianzhen, Zhang Si, Yang Zhifeng
Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, PR China.
Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, PR China.
J Environ Manage. 2023 Mar 1;329:116961. doi: 10.1016/j.jenvman.2022.116961. Epub 2022 Dec 20.
With an increasing quantity of plastic waste being discharged into the oceans, marine microplastic (MP) pollution has received widespread attention. However, the global occurrence characteristics, environmental risks, driving factors, and source-sink relationships remain unclear. In this study, we conducted a meta-analysis based on 165 articles about marine MP pollution. It was found that the global marine MP abundance displayed a significant spatial heterogeneity, and the distribution pattern was influenced by offshore distance, population density, and economic development. The morphological characteristics of MPs showed a significant difference between seawater and marine sediment, and small-size MPs (<1 mm) accounted for the majority of all MPs in the marine environment. The environmental risk assessment revealed that most of the marine MP pollution still remains at low concentrations in the global context, with the Polyurethane (PU), Polyacrylonitrile (PAN), and Polyvinyl chloride (PVC) types of MPs showing high environmental-risk contributions. In addition, land-based waste and marine operations, which were considered to be the dominant sources of marine MPs, primarily aggregated at nearshore submarine areas, in the water column, and in the deep-sea bottom environment. This study suggested that the combination of a meta-analysis and Monte Carlo simulation can provide much valuable information regarding the global occurrence characteristics and environmental risks of marine MPs.
随着越来越多的塑料垃圾被排放到海洋中,海洋微塑料(MP)污染受到了广泛关注。然而,全球的发生特征、环境风险、驱动因素以及源汇关系仍不明确。在本研究中,我们基于165篇关于海洋MP污染的文章进行了荟萃分析。研究发现,全球海洋MP丰度呈现出显著的空间异质性,其分布格局受离岸距离、人口密度和经济发展的影响。MP的形态特征在海水和海洋沉积物之间存在显著差异,小尺寸MP(<1毫米)在海洋环境中的所有MP中占大多数。环境风险评估显示,在全球范围内,大多数海洋MP污染仍处于低浓度水平,其中聚氨酯(PU)、聚丙烯腈(PAN)和聚氯乙烯(PVC)类型的MP显示出较高的环境风险贡献。此外,被认为是海洋MP主要来源的陆源废弃物和海洋作业,主要聚集在近岸海底区域、水柱和深海底部环境中。本研究表明,荟萃分析和蒙特卡罗模拟相结合可以提供有关海洋MP全球发生特征和环境风险的许多有价值的信息。