亚马逊河流中的微量金属来自巴西北部的沉积物:时空变化,来源和生态风险
Larissa Costa de Souza1, Camila Carneiro Dos Santos1, Neuton Trindade Vasconcelos Júnior2
1Universidade Federal do Pará, Instituto de Geociências, Campus Universitário do Guamá, s/n, Belém 66075-110, PA, Brazil.
Toxics
|October 28, 2025
概括
在贝莱姆的微量金属污染.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 城市生态城市生态学
背景情况:
- 城市微量金属污染是一个日益关注的问题,由水体附近的工业和人类活动驱动.
- 河流和海湾的表面沉积物是水生生态系统健康的关键指标.
研究的目的:
- 量化奥拉河,瓜马河和瓜哈拉湾沉积物的微量金属 (Co, Cr, Cu, Mn, Ni, Zn) 污染.
- 用地化学指标评估季节性变化并确定污染源.
主要方法:
- 在潮湿和干燥的季节收集了33个沉积物样本.
- 使用感应合等离子体光学发射光谱法 (ICP-OES) 分析了微量金属.
- 使用的地球积累指数 (Igeo),丰富系数 (EF) 和污染评估的平均ERM系数.
主要成果:
- 根据地化学指标,沉积物显示"中度污染和丰富".
- 金属度按照以下顺序进行:Mn > Zn > Cr > Ni > Co > Cu.
- (Zn) 和铜 (Cu) 呈现出最高的缩度,这表明人为来源.
结论:
- 靠近人类活动密集的地区更容易受到微量金属污染的影响,特别是在雨季.
- 定期监测和时间序列数据对于了解城市水生环境中的沉积物污染动态至关重要.
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