酸:对于流入有生态设施的水库的河流来说,它们是一个很大的问题吗?
Huan-Yu Tao1, Jianghong Shi2, Jiawei Zhang3
1School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Environmental Engineering Research Centre, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China.
酸 (PAE) 是饮用水中新出现的污染物. 这项为期四年的研究分析了城市-河流-水库系统中的PAE水平,分布和去除,发现城市地区是主要的贡献者,湿地有效地减少了PAE.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 水资源管理 水资源管理
背景情况:
- 酸 (PAE) 是饮用水源中新出现的污染物,对人类健康和水生生物构成风险.
- 城市-河流-水库系统对于饮用水供应至关重要,因此对PAE等污染物的管理至关重要.
研究的目的:
- 在四年内分析城市-河流-水库系统中六种常见的PAE的度,时空分布和去除效应.
- 确定PAE的主要来源,并了解它们在水和沉积物之间的分区.
- 评估与PAE污染相关的生态风险,并评估移除策略的有效性.
主要方法:
- 进行了为期四年的实地研究,收集和分析六个PAE的水和沉积物样本.
- 量化PAE度和确定时空分布模式.
- 利用灵敏度分布模型计算生态风险 (危险系数) 并评估PAE在湿地中的去除.
主要成果:
- 总PAE度在水中的范围为0.2-7.4μg L-1和沉积物中的范围为9.2-9594.1 ng g-1.
- 主要的PAE是di-n-butyl甲酸盐 (DBP) 和bis(2-乙烯基甲酸盐 (DEHP),在水中占57.2%,在沉积物中占94.1%.
- 城市地区贡献了72%的PAE,湿地显示了40.2%的去除率,在一些样本中,DBP和DEHP构成中等的生态风险.
结论:
- 城市排水是饮用水系统中PAE的重要来源.
- 湿地有效地去除PAE,不同的PAE显示出不同的去除途径 (水与沉积物阶段).
- 生态工程策略,特别是湿地利用,有效地减轻了PAE在饮用水源中的生态风险.
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