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长江潜在有毒金属的百年级来源转移 (化物) 在长江

Hualong Hong¹, Lu Qian¹, Shengjie Wu²

¹Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, Fujian, China.

Journal of hazardous materials

|September 23, 2023

概括

这项研究追踪了长江大三角洲一个世纪的潜在有毒金属 (PTM) 沉积情况,将PTM与特定的人类活动 (如发电和运输) 联系起来,以改善环境管理.

科学领域:

环境科学环境科学
地质化学地质化学
沉积物学的沉积物学

背景情况:

河口沉积物提供了人类活动产生的潜在有毒金属 (PTM) 排放的历史记录.
经常缺乏对来自不同人类活动的PTM贡献及其与河流有机物之间的关系的准确估计.

研究的目的:

重建长江大三角洲一个世纪的PTM沉积历史.
识别潜在的金属来源 (PMS) 和它们与河流排放的关联.
调查与素相关的土壤蛋白 (GRSP) 在PTM沉积中的作用,并将PTM与特定的人类活动联系起来.

主要方法:

分析了沉积物核心,重建了上个世纪的PTM沉积历史.
积极矩阵因子化 (PMF) 用于识别八个潜在的金属来源 (PMS).
使用滞后相关性分析将PMS与河流排放和人类活动联系起来.

主要成果:

在长江的河流PTM中,Cr,Ni和Pb占主导地位,度较低.
与谷氨酸相关的土壤蛋白 (GRSP) 显示出对Cu的强烈亲和力,对其沉积 (2.82-22.6%) 作出了重大贡献.
产能管理系统的变化主要与发电有关,而与GRSP相关的产能管理系统与道路建设和运输有关.

结论:

人类活动,特别是以煤炭为基础的发电和公路运输,显著影响了河口环境中的PTM沉积.
负责任地管理这些活动对于保持生态安全和实现可持续发展目标至关重要.
了解河流PTM,有机物 (GRSP) 和人为来源之间的相互作用对于有效的环境管理至关重要.

关键词:

人类世 (Anthropocene) 是一个人类世.人类活动人类活动陆海协调陆海协调陆海协调阳性矩阵分解因子是正的.微量金属微量金属微量金属

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