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Characteristics and distribution of microplastics in the surface water of the Songhua River in China
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Microplastics were detected at all sampling sites along the Songhua River in northeast China, ranging from 1.09 to 15.97 items per liter with a mean of 5.72, and concentrations were highest near urban centers and lowest in upstream rural reaches, with fibers and fragments as the dominant morphologies.
This paper studied on the microplastics (MPs) pollution in the surface water of the Songhua River in China. MPs were detected in all sampling sites of the river, the abundance of MPs ranged from 1.09 to 15.97 items/L, and the average abundance was 5.72 ± 4.02 items/L. Human interference had a significant impact on the abundance of MPs, and abundance in the downstream were higher than those in the upstream in the urban area along the Songhua River. In this study, MPs with size <0.5 mm and size [0.5,1) mm were the main sizes; fiber and debris were the most common types; yellow was the dominant color. MPs in the Songhua River might have similar sources and degradation experiences, because the size, type, and color had no significant difference (P>0.05) in different sampling sections. PE, PET, and PS were the most common polymers of MPs, accounting for 33.55%, 29.68%, and 18.71%, respectively.
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Spatial distribution and potential sources of microplastics in the Songhua River flowing through urban centers in Northeast China
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Microplastics were sampled from river water and wastewater treatment plant effluents at five cities along the Songhua River in northeast China, finding polyethylene and polypropylene as dominant polymers and identifying urban WWTPs as the primary point sources of microplastic input to the river.
Distribution Patterns of Microplastics Pollution in Urban Fresh Waters: A Case Study of Rivers in Chengdu, China
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Researchers surveyed microplastic pollution in urban rivers of Chengdu, China, finding concentrations of 5 to 10.5 items per liter, predominantly transparent fragments and fibers, with spatial distribution influenced by urbanization and wastewater discharge.
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Researchers surveyed microplastic concentrations in urban rivers of Chengdu, China, finding MP abundances of 20-763 items per liter in water and linking higher concentrations to dense residential areas and industrial land use. Polyethylene and polypropylene fibers dominated the MP assemblage, consistent with textile laundering and household waste as primary sources.
[Composition and Distribution of Microplastics in the Water and Sediments of Urban Rivers in Beijing].
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Researchers measured microplastic concentrations in water and sediments from eight sampling points along urban rivers in Beijing. Microplastics were widespread, with fibers being the most common type, likely from laundry and textile sources. Urban rivers are important conduits that transport microplastics from cities into larger water bodies and ultimately the ocean.
Occurrence and characteristics of microplastics in the Haihe River: An investigation of a seagoing river flowing through a megacity in northern China
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Microplastics were found throughout the Haihe River in northern China at concentrations of 0.69 to 74.95 items per square meter, with fibers dominant and polyethylene and polypropylene the most common polymers. Weathering features including scratches and micropores on particle surfaces confirmed long-term environmental exposure before collection.
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