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

IF 2.9 Q2 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH

ACS Chemical Health & Safety Pub Date : 2024-11-10 DOI:10.1016/j.jhazmat.2024.136472

Dan Wang, Le Zhang, Wangwang Li, Meng Chang, Xiaoning Liu, Zhaowei Zhang, Zhi-Quan Tian

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Abstract

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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水利工程对河流生态系统中微塑料分布的影响：青藏高原拉萨河流域案例研究

水利工程会影响微塑料（MP）的迁移、悬浮和沉积。然而，水利工程对河流生态系统中微塑料（MP）污染的影响仍不明确。在此，我们研究了中国青藏高原拉萨河流域的微塑料特征以及水利工程对微塑料的影响。结果表明，由于地表水中的 MPs 在中游沉降并储存于水库沉积物中，地表水中 MPs 的浓度从上游向下游递减。据推测，由于水库的阻隔效应、稳定的流体力学以及盐度引起的微弱浮力，水库沉积 MPs 的速度较快。为了评估拉萨河流域的生态风险，分析了污染负荷指数、聚合物危害指数和潜在生态风险指数。拉萨河流域的污染负荷指数、高分子危害指数和潜在生态风险指数与拉萨河流域的污染负荷指数、高分子危害指数和潜在生态风险指数相近。该研究对拉萨河全流域的高分子聚合物分布进行了初步探索，为研究水利工程对高分子聚合物迁移的影响提供了基础框架。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Chemical Health & Safety PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH-

CiteScore

3.10

自引率

20.00%

发文量

期刊介绍： The Journal of Chemical Health and Safety focuses on news, information, and ideas relating to issues and advances in chemical health and safety. The Journal of Chemical Health and Safety covers up-to-the minute, in-depth views of safety issues ranging from OSHA and EPA regulations to the safe handling of hazardous waste, from the latest innovations in effective chemical hygiene practices to the courts'' most recent rulings on safety-related lawsuits. The Journal of Chemical Health and Safety presents real-world information that health, safety and environmental professionals and others responsible for the safety of their workplaces can put to use right away, identifying potential and developing safety concerns before they do real harm.