Ecology and Biodiversity, Department of Biology, Utrecht University, Padualaan 8, 3584 CA Utrecht, The Netherlands.
J Hazard Mater. 2012 Feb 15;203-204:290-8. doi: 10.1016/j.jhazmat.2011.12.024. Epub 2011 Dec 17.
A full-scale remediation facility including a detention basin and a wetland was tested for retention of heavy metals and Poly-Aromatic Hydrocarbons (PAHs) from water drained from a motorway in The Netherlands. The facility consisted of a detention basin, a vertical-flow reed bed and a final groundwater infiltration bed. Water samples were taken of road water, detention basin influent and wetland effluent. By using automated sampling, we were able to obtain reliable concentration averages per 4-week period during 18 months. The system retained the PAHs very well, with retention efficiencies of 90-95%. While environmental standards for these substances were surpassed in the road water, this was never the case after passage through the system. For the metals the situation was more complicated. All metals studied (Cu, Zn, Pb, Cd and Ni) had concentrations frequently surpassing environmental standards in the road water. After passage through the system, most metal concentrations were lower than the standards, except for Cu and Zn. There was a dramatic effect of de-icing salts on the concentrations of Cu, Zn, Cd and Ni, in the effluent leaving the system. For Cu, the concentrations even became higher than they had ever been in the road water. It is advised to let the road water bypass the facility during de-icing periods.
一个包括滞留池和湿地的全面修复设施，用于从荷兰一条高速公路排水中去除重金属和多环芳烃 (PAHs)。该设施由滞留池、垂直流芦苇床和最终地下水渗透床组成。采集了道路水、滞留池进水和湿地出水的水样。通过使用自动化采样，我们能够在 18 个月内每 4 周获得可靠的浓度平均值。该系统对 PAHs 的去除效果非常好，去除效率达到 90-95%。虽然这些物质的环境标准在道路水中超过了，但在系统通过后从未超过。对于金属，情况更加复杂。研究的所有金属（Cu、Zn、Pb、Cd 和 Ni）在道路水中的浓度经常超过环境标准。在系统通过后，除了 Cu 和 Zn 外，大多数金属的浓度都低于标准。除冰盐对系统出水的 Cu、Zn、Cd 和 Ni 浓度有显著影响。对于 Cu，其浓度甚至高于道路水中的浓度。建议在除冰期间让道路水绕过该设施。
