颗粒物和溶解相重金属在成熟的雨水生物保留细胞中的相互作用
Kristen Croft1, Birthe V Kjellerup1, Allen P Davis1
1Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, 20742, USA.
Journal of environmental management
|January 23, 2024
概括
成熟的生物保留系统有效地去除颗粒金属,但与溶解的铜和作斗争. 需要进一步的研究和维护,以保护水生环境免受这些移动污染物的侵害.
科学领域:
- 环境工程环境工程
- 水质管理水质管理
- 城市水文学 城市水文学
背景情况:
- 生物保留系统是用于管理城市排水量和质量的常见雨水控制措施 (SCM).
- 之前的研究证实了通过生物保留有效去除总金属,特别是铜 (Cu) 和 (Zn).
- 老,成熟的生物保留系统在去除溶解金属方面的性能仍然在很大程度上是未知的.
研究的目的:
- 为了评估16至18岁的生物保留细胞在去除铜和方面的长期性能.
- 在成熟的生物保留系统中描述Cu和Zn的总和溶解形式的分离和去除.
- 评估金属在雨水和生物保留废水中的流动性和物种化.
主要方法:
- 收集并分析了流量加权的流量和废水的复合样本,以检测总和溶解的和.
- 具有金属和颗粒大小分布的路沉积沉积物 (RDS) 的特征大小分成部分.
- 利用MINTEQ物种化建模来确定金属与溶解有机物 (DOM) 的结合.
主要成果:
- 成熟的生物保留系统实现了颗粒结合金属的高去除率 (82%为Cu,83%为Zn).
- 在流入和流出之间没有观察到溶解金属度的显著差异,这表明除去有限.
- 废水中总Cu和Zn度与历史数据相比稳定或略有增加,Cu主要与DOM结合.
结论:
- 成熟的生物保留系统有效地保留颗粒金属,但对去除溶解的和的能力有限.
- 溶解的金属,特别是,可以在污水中存在,其度可能对水生生态系统有害.
- 考虑媒体修改,维护和监测对于提高SCM中溶解金属的去除至关重要.
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