Spatial and Temporal Variation Characterization and Variability of Microplastics in Water-borne River and Reservoir
Abstract
Water-source rivers and reservoirs are crucial sources of drinking water for numerous urban and rural areas. In depth exploration of the occurrence characteristics and risk differences of microplastics （MPs） in these two types of water environments is of great significance for formulating targeted pollution control strategies for MPs. This study selected the Dongjiang River and Xinfengjiang Reservoir， important drinking water sources in Guangdong Province， China， as the research objects. Through a systematic investigation of the abundance， composition， and diversity of MPs in their surface water and sediments， the differences in the pollution characteristics of MPs in the two types of water environments under spatiotemporal changes were explored in depth. The research results showed that during the dry and wet seasons， the abundance ranges of MPs in the surface water of the Dongjiang River were 180-500 and 33-300 items·m-3， respectively， and the corresponding abundance ranges of MPs in sediments were 145-1 610 and 105-410 items·kg-1， respectively. In the Xinfengjiang Reservoir， the abundance ranges of MPs in the surface water during the dry and wet seasons were 120-750 and 233-733 items·m-3， respectively， and the abundance ranges of MPs in sediments were 75-365 and 80-445 items·kg-1， respectively. The detected MPs were predominately 0.1-1 mm， fibrous， and white， and PET， PP， PE， and CP were the dominant polymer types. During the dry season， the abundance of MPs in the…
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