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6th International Groundwater. Quality Conference held in Fremantle, Western Australia, 2â7 December 2007). 1. In situ remediation of arsenic at a highly.

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GQ07: Securing Groundwater Quality in Urban and Industrial Environments (Proc. 6th International Groundwater Quality Conference held in Fremantle, Western Australia, 2–7 December 2007).

In situ remediation of arsenic at a highly contaminated site in Northern Germany T. KRÜGER1, H. M. HOLLÄNDER1,2, P.-W. BOOCHS1, M. BILLIB1, J. STUMMEYER3 & B. HARAZIM3 1 Institute of Water Resources Management, Hydrology and Agricultural Hydraulic Engineering, Leibniz University of Hannover, Appelstr 9A, 30167 Hannover, Germany [email protected] 2 CSIRO Land and Water, Private Bag No. 2, Urrbrae 5064, South Australia, Australia 3 Federal Institute of Geosciences and Natural Resources (BGR), Stilleweg 2, 30655 Hannover, Germany

Abstract High arsenic concentrations (up to 8800 µg/L) were detected in groundwater at a military site in Northern Germany. The majority of the arsenic is organically bound (80-95%). Arsenate and arsenite (each