气候变化领域集成服务门户(CCPortal): New insights into the distribution, potential source and risk of microplastics in Qinghai-Tibet Plateau

CCPortal

DOI	10.1016/j.envint.2023.107956
	New insights into the distribution, potential source and risk of microplastics in Qinghai-Tibet Plateau
	Li, Qianqian; Han, Ziwei; Su, Guijin; Hou, Meifang; Liu, Xihui; Zhao, Xu; Hua, Yukang; Shi, Bin; Meng, Jing; Wang, Mengjing
发表日期	2023
ISSN	0160-4120
EISSN	1873-6750
卷号	175
英文摘要	Microplastics (MPs) as emerging contaminants have become a major global concern, however, the distribution and origin of MPs in Qinghai-Tibet Plateau (QTP) and their impacts on ecosystem are poorly known. Hence, we systematically evaluated the profile of MPs on the representative metropolitan locations of Lhasa and Huangshui Rivers and the scenic sites of Namco and Qinghai Lake. The average abundance of MPs in the water samples was 7020 items/m3, which was 34 and 52 times higher than those for the sediment (206.7 items/m3) and soil samples (134.7 items/m3), respectively. Huangshui River had the highest levels, followed by Qinghai Lake, Lhasa River and Namco. Human activities rather than altitude and salinity impacted the distribution of MPs in those areas. Besides the consumption of plastic products by locals and tourists, laundry wastewater and exogenous tributary inputs, the unique prayer flag culture also contributed to the MPs emission in QTP. Notably, the stability and fragment of MPs were crucial for their fate. Multiple assessment models were employed to evaluate the risk of MPs. PERI model took MP concentration, background value and toxicity into account, comprehensively describing the risk differences of each site. The large PVC proportion in Qinghai Lake posed the highest risk. Furthermore, concerns should be raised about PVC, PE and PET in Lhasa and Huangshui Rivers, and PC in Namco Lake. Risk quotient suggested that aged MPs in sediments slowly released biotoxic DEHP and should be cleaned up promptly. The findings offer baseline data of MPs in QTP and ecological risks, providing important support for the prioritization of future control measures.
关键词	Microplastics Qinghai Tibetan Plateau Distribution Potential source Risk assessment
英文关键词	SPATIAL-DISTRIBUTION; SURFACE SEDIMENTS; PHTHALATE-ESTERS; RIVER ESTUARY; HEAVY-METAL; WATER; POLLUTION; ABUNDANCE; DEBRIS; LAKE
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001000695000001
来源期刊	ENVIRONMENT INTERNATIONAL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283165
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Shanghai Institute of Technology; City University of Hong Kong; City University of Hong Kong
推荐引用方式 GB/T 7714	Li, Qianqian,Han, Ziwei,Su, Guijin,et al. New insights into the distribution, potential source and risk of microplastics in Qinghai-Tibet Plateau[J],2023,175.
APA	Li, Qianqian.,Han, Ziwei.,Su, Guijin.,Hou, Meifang.,Liu, Xihui.,...&Wang, Mengjing.(2023).New insights into the distribution, potential source and risk of microplastics in Qinghai-Tibet Plateau.ENVIRONMENT INTERNATIONAL,175.
MLA	Li, Qianqian,et al."New insights into the distribution, potential source and risk of microplastics in Qinghai-Tibet Plateau".ENVIRONMENT INTERNATIONAL 175(2023).