长江源区水体微塑料组成及分布特征初探

微塑料作为一种新型污染物已在全球范围内引起高度关注.长江源是“中华水塔”,是我国最重要的生态功能区之一,但是对该区域微塑料的污染水平及分布尚不清楚.本研究调查了长江源区河流水体微塑料的污染状况,结果表明:在各采样点中均检测到微塑料,其丰度范围为247～2 686个/m3,平均丰度为(1 823±949)个/m3;粒径＜...

Preliminary Study on Composition and Distribution Characteristics of Microplastics in Water from the Source Region of Yangtze River

Microplastics as a type of emerging pollutant has received great concerns worldwide. The source region of the Yangtze River is the “Chinese Water Tower” and is also one of the most important ecological function areas in China; but the pollution level and distribution of microplastics in this area are unclear. In this study we investigated into the microplastics pollution in the surface water of the source region of the Yangtze River. Results unveil that microplastics is detected at different sampling sites, with an abundance range of 247-2 686/m³ and an average abundance of 1 823±949/m³; microplastics with particle size smaller than 0.05 mm were dominant, accounting for about 70%; fragments were observed in all the water samples and were superior in numbers, accounting for about 96.2%; most microplastics were transparent. In addition, the most common types of polymers in microplastics are nylon and polyethylene, both accounting for about 30%. Our results suggest that the source region of the Yangtze River is being polluted by microplastics, and research on microplastics in this region should be deepened.