印度布拉姆普特拉河谷中部贾巴拉利河的微塑料的洪水引起的变化和来源分配
Jigyashree Lahon1, Sumi Handique2
1Department of Environmental Science, Tezpur University, Tezpur (Assam), 784028, India. ljigyashree@gmail.com.
Environmental monitoring and assessment
|November 21, 2024
概括
洪水显著增加了印度河流中的微塑料 (MP) 污染,洪水后发现的度更高. 纤维和碎片是主要的MP类型,对淡水生态系统构成潜在风险.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 河流生态 河流生态
背景情况:
- 微塑料 (MP) 是淡水系统中普遍存在的全球污染物.
- 洪水被认为是从陆地到海洋环境的MP运输的主要驱动因素.
- 关于洪水对印度河流MP污染的影响存在严重的知识缺口.
研究的目的:
- 调查印度贾巴拉利河的微塑料丰富度和分布的洪水引起的变化.
- 为了确定MPs的主导类型和聚合物组成.
- 评估与微塑料污染相关的生态风险,并确定潜在的来源.
主要方法:
- 在洪水前后期间,在地表水和沉积物中对MP度的比较分析.
- 识别和量化MP类型 (纤维,碎片等). 和聚合物组成.
- 用于风险评估的聚合物危险指数 (PHI) 和微塑料影响系数 (CMPI) 的计算.
主要成果:
- 洪水后发现,与洪水前相比,表面水和沉积物中的MP度显著更高.
- 纤维是洪水前和洪水后地表水中占主导地位的MP类型,而碎片则占据了洪水后沉积物的主导地位.
- 聚乙烯和聚烯是最常见的聚合物类型;风险指数表明潜在的环境危害.
结论:
- 洪水加剧了贾巴拉利河的微塑料污染,改变了MP的分布和丰富性.
- 农业排水和人为活动是河流MP污染的重要贡献者.
- 这些发现为制定减轻和纠正印度淡水生态系统中微塑料污染的战略提供了关键数据.
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