The influence of water conservancy project on microplastics distribution in river ecosystem: A case study of Lhasa River Basin in Qinghai-Tibet Plateau

被引：0
作者：
Wang, Dan [1 ,2 ,3 ]
Zhang, Le [1 ,3 ]
Li, Wangwang [1 ,3 ]
Chang, Meng [1 ]
Liu, Xiaoning [4 ]
Zhang, Zhaowei [2 ,4 ,5 ]
Tian, Zhi-Quan [1 ,3 ]
机构：
[1] Tibet Univ, Sch Ecol & Environm, Key Lab Biodivers & Ecoenvironm Protect Qinghai Ti, Minist Educ,Key Lab Environm Engn & Pollut Control, Lhasa 850000, Peoples R China
[2] Wuhan Text Univ, Sch Bioengn & Hlth, State Key Lab New Text Mat & Adv Proc Technol, Wuhan 430200, Peoples R China
[3] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China
[4] Wuhan Univ, State Key Lab Water Resources Engn & Management, Wuhan 430072, Peoples R China
[5] Hubei Hongshan Lab, Wuhan 430062, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2024年 / 480卷
关键词：
Lhasa River basin; Qinghai-Tibet Plateau; Reservoir; Microplastic; Ecological risk assessment; MARINE-ENVIRONMENT; SURFACE-WATER; POLLUTION; SEDIMENTS; ESTUARY; SYSTEM;
D O I：
10.1016/j.jhazmat.2024.136472
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Water conservancy projects affect the migration, suspension, and deposition of microplastic (MP). However, its impact on MP pollution of river ecosystem remains elusive. Herein, we investigated the MP characteristics and the influence of water conservancy projects on MPs in the Lhasa River Basin of the Qinghai-Tibet Plateau, China. The results demonstrated that the MPs concentration in surface water decreased from upstream to downstream, as more MPs in surface water were settling down and stored in reservoir sediments in the midstream. It is postulated that reservoir sedimentation of MPs occurs at a greater rate due to the barrier effect of reservoirs, steady hydrodynamics, and weak salinity-induced buoyancy. To evaluate the ecological risk of the Lhasa River Basin, the pollution load index, the polymer hazard index, and the potential ecological risk index were analyzed. The upstream exhibits elevated polymer hazard index values (>100), and the potential ecological risk index values in the Lhasa River Basin showed ecological risk similar to those of pollution load index values. This research represents the initial exploration of MP distribution within the entire Lhasa River basin, providing a foundational framework for investigating the impact of water conservancy projects on MP migration.
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页数：10
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