Key Laboratory of Water Cycle and Related Land Surface Process, Institute of Geographic Science and Natural Resources Research, Chinese Academy of Science, Beijing 100101, China; School of Renewable Energy, North China Electric Power University, Beijing 102206, China.
Key Laboratory of Water Cycle and Related Land Surface Process, Institute of Geographic Science and Natural Resources Research, Chinese Academy of Science, Beijing 100101, China.
J Hazard Mater. 2021 Sep 5;417:126034. doi: 10.1016/j.jhazmat.2021.126034. Epub 2021 May 7.
Microplastics (MPs) have been widely detected in the environments, yet the sources of MPs in freshwater of remote areas at high altitude were not well understood. This study investigated the abundance and distribution of MPs in water bodies and sediments at the Qinghai-Tibet Plateau (QTP). MPs were detected in all samples (47 water and 33 sediment samples) with the mean abundance of 624.70 ± 411.39 items/m in water and 41.52 ± 22.31 items/kg in sediment. In descending order, the highest MP oncentrations were found in turbid rivers＞agricultural channel water＞lakes＞ordinary rivers. The results showed that MP abundance was associated with the water quality (especially COD) on the QTP, and it was negatively correlated with altitude due to less human activities (especially agricultural activities) at high altitude areas. In addition, more abundant MPs with small sized was found in the higher altitudes than low ones. Determining the effects of different environments on the distribution and degradation of MPs in the high altitude area of the QTP, this study emphasized the attention to be given to this emerging pollutant in the high altitude remote areas.
微塑料（MPs）广泛存在于环境中，但在高海拔偏远地区淡水环境中的 MPs 来源仍不清楚。本研究调查了青藏高原（QTP）水体和沉积物中 MPs 的丰度和分布情况。所有样本（47 个水样和 33 个沉积物样本）中均检测到 MPs，水中 MPs 的平均丰度为 624.70±411.39 个/ m，沉积物中为 41.52±22.31 个/ kg。按 MPs 浓度降序排列，浊流水＞农业渠水＞湖泊＞普通河水。结果表明，MP 丰度与 QTP 上的水质（特别是 COD）有关，由于高海拔地区人类活动（特别是农业活动）较少，其与海拔高度呈负相关。此外，高海拔地区的 MPs 丰度高于低海拔地区，且尺寸较小。该研究确定了不同环境对 QTP 高海拔地区 MPs 分布和降解的影响，强调了在高海拔偏远地区对这种新兴污染物的关注。
