Abundance and characteristics of microplastics in the surface water and sediment of parks in Xi'an city, Northwest China.
Abundance and characteristics of microplastics in the surface water and sediment of parks in Xi'an city, Northwest China.
复制标题
西安市公园地表水和沉积物中微塑料丰度及特征.
DOI：
10.1016/j.scitotenv.2021.150953
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发表时间：
2021-10
期刊：
影响因子：
--
通讯作者：
Lingyan Zhu
中科院分区：
文献类型：
--
作者：
Xiaoqin Yu;Yimo Zhao;Chutian Zhang;Chengfang Yang;Zhuozhi Ouyang;Peng Liu;Xuetao Guo;Lingyan Zhu
微塑料(MPS)作为一种新型污染物，近年来受到了广泛的关注，但对城市公园水体中MPS的分布和特征研究还不够深入。本研究对西北部最大的城市--西安市水和沉积物中MPS的污染状况进行了调查。地表水和底泥中MPS含量分别为2900~6970个/m~3和940~3560个/kg。根据城市功能将公园划分为居民区、商业区、旅游区和工业区，其中以旅游区和居民区的MPS丰度最高，说明了人类活动的影响。这些公园中的MPS主要有纤维、颗粒、碎片和薄膜四种形态，以纤维和碎片为主。提取的MPS大多较小，其中63%~92%的MPS小于0.5 mm。地表水和沉积物中的主要聚合物类型分别为聚丙烯和聚对苯二甲酸乙二酯。研究表明，公园水沙可作为MPS的重要汇，对监测和缓解城市MPS的污染具有重要意义。本研究为更好地了解内陆淡水MPS水平提供了重要参考。
Microplastics (MPs), as a new type of pollutants, have attracted wide attention especially in recent years, but there was insufficient research on the distribution and characteristics of MPs in urban park water body. In this study, the pollution of MPs in water and sediment of Xi'an, the largest city in northwest China, was investigated. The MPs concentration in the surface water and sediment was 2900–6970 items/m3and 940–3560 items/kg, respectively. According to the urban functions, the parks were divided into residential areas, commercial areas, tourism areas and industrial areas, and the highest abundance of MPs was observed in the tourism and residential areas, suggesting the impacts of human activities. MPs in these parks were mainly in four kinds of shapes, namely fiber, pellet, fragment and film, and dominated by fibers and fragments. Most of the extracted MPs were small in size, and 63–92% of them were smaller than 0.5 mm. Polypropylene and polyethylene terephthalate were the main polymer types in surface water and sediments, respectively. This study showed that the park water and sediment can be used as an important “sink” in MPs, which is of great significance for monitoring and alleviating the pollution of urban MPs. This study provided important reference for better understanding MPs levels in inland freshwaters.