城市河流沉积物中微塑料与重金属共生：垂直分布特征及综合生态风险评价

IF 11.3 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Hazardous Materials Pub Date : 2025-02-03 DOI:10.1016/j.jhazmat.2025.137500

Wenjuan He, Jinhui Huang, Si Liu, Lixiu Shi, Enjie Li, Jinying Hu, Wei Zhang, Chenyu Zhang, Haoliang Pang, Zhexi Liu

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引用次数: 0

摘要

微塑料（MPs）和重金属（HMs）被认为对河流生态系统构成生态风险。这些污染物的垂直分布更有利于反映沉积物的污染状况和监测趋势。分析了城市河流沉积物中HMs和MPs的水平和垂直分布，开展了风险评价，并进一步优化了MPs-HMs复合污染的二维综合指数（TPI）模型。沉积物中Zn、As和Cd的污染率最高，MP丰度在20.00±8.82 ~ 1933.33±141.42项·kg−1之间，主要以PE和碎片为特征。不同沉积物深度的MPs （PRI）平均潜在生态风险指数分别为197.21±247.14、176.79±293.86和246.98±538.38，为中等风险，PRI值最高。TPI显示，不同深度的TPI均值分别为324.10±138.63、368.30±157.13和481.88±296.05，表明综合污染风险等级属于可观，TPI随沉积物深度的增加而增大。研究结果进一步提高了综合污染物生态毒性研究的客观性和准确性，为从垂直角度深入了解城市淡水流域的MPs和HMs提供了依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Co-occurrence of microplastics and heavy metals to urban river sediments: the vertical distribution characterization and comprehensive ecological risk assessment

查看原文本刊更多论文

Co-occurrence of microplastics and heavy metals to urban river sediments: the vertical distribution characterization and comprehensive ecological risk assessment

Microplastics (MPs) and heavy metals (HMs) are deemed to pose ecological risks in river ecosystems. The vertical distribution of these pollutants is more conducive to reflecting pollution status and monitoring trends in the sediment. This work analyzed the horizontal and vertical distribution, carried out a risk assessment of HMs and MPs in urban river sediment, and further optimized the two-dimensional comprehensive index (TPI) model for MPs-HMs combined pollution. The highest rates of contamination were for Zn, As, and Cd, and MP abundance in sediment ranged from 20.00 ± 8.82 to 1933.33±141.42 items·kg⁻¹, mainly characterized by PE and fragments. Moreover, the mean potential ecological risk index for MPs (PRI) at different depths of sediment were 197.21±247.14, 176.79±293.86, and 246.98±538.38, respectively, indicating a moderate risk and the highest PRI value is at the bottom. The TPI exhibited that the average TPI at different depths is 324.10±138.63, 368.30±157.13, and 481.88±296.05, indicating that the comprehensive pollution risk level belongs to considerable, the TPI increases with the depth of the sediment. The results further improved the objectivity and accuracy of the research on the ecotoxicity of compositive pollutants and provided an in-depth understanding of MPs and HMs in urban freshwater basins from a vertical perspective.

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来源期刊

Journal of Hazardous Materials 工程技术-工程：环境

CiteScore

25.40

自引率

5.90%

发文量

3059

审稿时长

58 days

期刊介绍： The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.