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Title (Primary) Comparative evaluation of pilot scale horizontal subsurface-flow constructed wetlands and plant root mats for treating groundwater contaminated with benzene and MTBE
Author Chen, Z.; Kuschk, P.; Reiche, N.; Borsdorf, H.; Kästner, M.; Köser, H.;
Journal Journal of Hazardous Materials
Year 2012
Department UBT; MET;
Volume 209-210
Language englisch;
Keywords Benzene; Constructed wetland (CW); Methyl tert-butyl ether (MTBE); Plant root mats; Volatilisation
Abstract

In order to evaluate technology options for the treatment of groundwater contaminated with benzene and MTBE in constructed wetlands (CWs), a scarcely applied plant root mat system and two horizontal subsurface-flow (HSSF) CWs were investigated. The inflow load of benzene and MTBE were 188–522 and 31–90 mg d−1 m−2, respectively. Higher removal efficiencies were obtained during summer in all systems. The benzene removal efficiencies were 0–33%, 24–100% and 22–100% in the unplanted HSSF-CW, planted HSSF-CW and the plant root mat, respectively; the MTBE removal efficiencies amounted to 0–33%, 16–93% and 8–93% in the unplanted HSSF-CW, planted HSSF-CW and the plant root mat, respectively. The volatilisation rates in the plant root mat amounted to 7.24 and 2.32 mg d−1 m−2 for benzene and MTBE, which is equivalent to 3.0% and 15.2% of the total removal. The volatilisation rates in the HSSF-CW reached 2.59 and 1.07 mg d−1 m−2, corresponding to 1.1% and 6.1% of the total removal of benzene and MTBE, respectively. The results indicate that plant root mats are an interesting option for the treatment of waters polluted with benzene and MTBE under moderate temperatures conditions.
ID 12174
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=12174
Chen, Z., Kuschk, P., Reiche, N., Borsdorf, H., Kästner, M., Köser, H. (2012):
Comparative evaluation of pilot scale horizontal subsurface-flow constructed wetlands and plant root mats for treating groundwater contaminated with benzene and MTBE
J. Hazard. Mater. 209-210 , 510 - 515