Fujian Key Laboratory of Functional Marine Sensing Materials, Institute of Oceanography, Minjiang University, Fuzhou 350108, China.
Department of Marine Chemistry, National Marine Environmental Monitoring Center, Dalian 116023, China; College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China.
Mar Pollut Bull. 2020 May;154:111089. doi: 10.1016/j.marpolbul.2020.111089. Epub 2020 Mar 20.
Investigating the heterogeneous distribution pattern of plastic pollution in river systems is useful for better understanding the transport pathways of plastics from land to sea. Therefore, we analyzed samples from 17 sites to evaluate the distribution pattern of microplastics (MPs) in Minjiang River Watershed. The MP concentrations ranged between 0.12 and 2.72 n/L, with higher microplastic concentrations located in urban areas with greater population and gross domestic product (GDP) densities. MP concentrations were positively correlated with population density, GDP density, and built-up land use percentage, suggesting that increasing urbanization level will lead to greater plastic pollution. MP concentrations spanning the upstream and downstream sides of the SK Hydropower Dam showed decreasing trends, suggesting that MP settling would occur behind the dam and Shuikou Reservoir might serve as a sink for MPs. This study provides useful insight for revealing the effects of urbanization and dams on spatial distribution of riverine MPs.
研究河流系统中塑料污染的异质分布模式有助于更好地了解塑料从陆地到海洋的输运途径。因此，我们分析了 17 个采样点的样本，以评估闽江流域中微塑料（MPs）的分布模式。MP 浓度范围在 0.12 到 2.72 n/L 之间，人口密度和国内生产总值（GDP）密度较大的城区微塑料浓度较高。MP 浓度与人口密度、GDP 密度和建成区土地利用百分比呈正相关，表明城市化水平的提高将导致更多的塑料污染。在 SK 水电站大坝上下游两侧的 MP 浓度呈下降趋势，表明 MP 沉降可能发生在大坝后面，水口水库可能是 MPs 的汇。本研究为揭示城市化和大坝对河流 MPs 空间分布的影响提供了有用的见解。
