A three-stage treatment system for highly polluted urban road runoff.
作者： Rita Hilliges , Alexander Schriewer , Brigitte Helmreich
DOI: 10.1016/J.JENVMAN.2013.05.024
关键词:
摘要: A three-stage treatment device for polluted urban road runoff was installed and tested at a highly trafficked over period of one year. In the first stage coarse material particles from are removed by special gutter system. The second eliminates using hydrodynamic separator. third dissolved pollutants adsorbed in filter unit with lignite as material. Twenty-four rain events were sampled year analyzed particulate copper (Cu), zinc (Zn), lead (Pb), suspended solids (SS), total organic carbon (TOC), sodium (Na), pH value. system able to safely retain all relevant during investigated period, except Na. effluent Pb could never be detected, values measured Zn range detection limit. Cu, element most frequently detected effluent, exceeded critical value 50 μg/L set German Federal Soil Protection Act Ordinance. median Cu concentration 8.13 μg/L. proved very effective. Highly can purified an extent that no contamination risk soil groundwater remains when infiltrated into soil.
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