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Title (Primary) Concentrations and speciation of arsenic in groundwater polluted by warfare agents
Author Daus, B.; Hempel, M.; Wennrich, R.; Weiß, H.;
Journal Environmental Pollution
Year 2010
Department ANA; GWS;
Volume 158
Issue 11
Language englisch;
Keywords Phenylarsenicals; Arsenic species; Groundwater conditions
Abstract Groundwater polluted with phenylarsenicals from former warfare agent deposits and their metabolites was investigated with respect to the behavior of relevant arsenic species. Depth profiles at the estimated source and at about 1 km downgradient from the source zone were sampled. The source zone is characterized by high total arsenic concentrations up to 16 mg L-1 and is dominated by organic arsenic compounds. The concentrations in the downgradient region are much lower (up to 400 µg L-1) and show a high proportion of inorganic arsenic species. Iron precipitation seems to be an effective mechanism to prevent dispersion of inorganic arsenic as well as phenylarsonic acid. Reductive conditions were observed in the deeper zone with predominant occurrence of trivalent arsenic species. The inorganic species are in redox equilibrium, whereas the phenylarsenic compounds have variable proportions. Methylphenylarsinic acid was identified in groundwater in traces which indicates microbial degradation activity.The environmental fate and behavior of phenylarsenicals in groundwater are influenced by the geochemical environment.
ID 9872
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=9872
Daus, B., Hempel, M., Wennrich, R., Weiß, H. (2010):
Concentrations and speciation of arsenic in groundwater polluted by warfare agents
Environ. Pollut. 158 (11), 3439 - 3444