Occurrence of microplastics in natural and farmland soil in the Qilian Mountains of the Northern Tibetan Plateau  

作　　者：KANG Qiangqiang ZHANG Yulan KANG Shichang ZHANG Shengyin LUO Xi LI Longrui WANG Zhaoqing ZHANG Shuncun 

机构地区：[1]Key Laboratory of Petroleum Resources Exploration and Evaluation,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory of Cryospheric Science and Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China [4]College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China

出　　处：《Journal of Mountain Science》2024年第7期2159-2172,共14页山地科学学报（英文）

基　　金：financial support from the National Natural Science Foundation of China(42322105,42071082);Outstanding Youth Fund of Gansu Province(23JRRA612)。

摘　　要：Microplastics(MPs)become ubiquitous in soil and are an environmental and public health concern worldwide.However,the status of MPs in natural and farmland soils in remote areas remains poorly understood.In this study,we investigated the characteristics of MPs in natural and farmland soils along two transects in the Qilian Mountains of the northern Tibetan Plateau.The average abundance of MPs in natural and farmland soils was 29,778 and 56,123 items kg^(-1),respectively,with a detection size range of 10-1000μm.MPs in the size range of 10-100μm accounted for 84.1%of particles detected.Among the 21 polymers detected,polyethylene dominated in both farmland and natural soils.The shape of MPs was dominated by fragments(95.8%),followed by fibers(3.8%)and beads(0.4%).The abundance of MPs was positively correlated with increasing altitude in natural soils.There was no significant correlation between the abundance of MPs and soil physicochemical properties due to the narrow range of values of soil physicochemical properties.With the growing concern regarding MPs pollution,research on the status of MPs in high altitude and remote areas is critical to understanding their global cycle.

关 键 词：Microplastics pollution SOIL Remote areas Tibetan Plateau 

分 类 号：X53[环境科学与工程—环境工程]