Zhang Kai, Gong Wen, Lv Jizhong, Xiong Xiong, Wu Chenxi
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; Graduate University Chinese Academy of Sciences, Beijing 100039, China.
School of Earth Sciences, China University of Geosciences, Wuhan 430074, China.
Environ Pollut. 2015 Sep;204:117-23. doi: 10.1016/j.envpol.2015.04.023. Epub 2015 May 4.
We investigated the occurrence and distribution of microplastics in surface water from the Three Gorges Reservoir. Nine samples were collected via trawl sampling with a 112 μmmesh net. The abundances of microplastics were from 3407.7 × 10(3) to 13,617.5 × 10(3) items per square kilometer in the main stream of the Yangtze River and from 192.5 × 10(3) to 11,889.7 × 10(3) items per square kilometer in the estuarine areas of four tributaries. The abundance of microplastics in the main stream of the Yangtze River generally increased as moving closer to the Three Gorges Dam. The microplastics are made exclusively of polyethylene (PE), polypropylene (PP), and polystyrene (PS). Together with microplastics, high abundance of coal/fly ash was also observed in the surface water samples. Comparing with previously reported data, microplastics in the TGR were approximately one to three orders of magnitudes greater, suggesting reservoirs as potential hot spot for microplastic pollution.
我们调查了三峡水库地表水微塑料的发生情况和分布。通过使用112微米网目的拖网采样收集了9个样本。长江干流中微塑料的丰度为每平方公里3407.7×10³至13617.5×10³个，四条支流河口区域为每平方公里192.5×10³至11889.7×10³个。长江干流中微塑料的丰度一般随着靠近三峡大坝而增加。微塑料仅由聚乙烯（PE）、聚丙烯（PP）和聚苯乙烯（PS）制成。与微塑料一起，在地表水样本中还观察到高丰度的煤/粉煤灰。与先前报道的数据相比，三峡水库中的微塑料大约高1至3个数量级，表明水库是微塑料污染的潜在热点。
