Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 444508
Title Stimulation of Hexachlorocyclohexane (HCH) Biodegradation in a Full Scale In Situ Bioscreen
Author(s) Langenhoff, A.A.M.; Staps, S.J.M.; Pijls, C.; Rijnaarts, H.H.M.
Source Environmental Science and Technology 47 (2013)19. - ISSN 0013-936X - p. 11182 - 11188.
Department(s) Sub-department of Environmental Technology
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) sulfate-reducing bacteria - gamma-hexachlorocyclohexane - alpha-hexachlorocyclohexane - beta-hexachlorocyclohexane - aerobic biomineralization - reductive dechlorination - anaerobic-bacteria - mass-transfer - degradation - soil
Abstract The feasibility of a bioscreen for the in situ biodegradation of HCH and its intermediates is demonstrated at a contaminated site in The Netherlands, via the discontinuous addition of methanol as electron donor. An infiltration system was installed and operated at the site over a length of 150 m and a depth of 8 m, to create an anaerobic infiltration zone in which HCH is converted. The construction of the infiltration system was combined with the redevelopment of the site. During passage through the bioscreen, the concentration of HCH in the groundwater decreased from 600 µg/L to the detection limit of the individual HCH isomers (0.01 µg/L) after one year of operation. The concentration of the intermediate biodegradation products benzene and chlorobenzene increased and achieved steady state values of respectively 800 and 2700 µg/L. Benzene and chlorobenzene were treated aerobically on site in an existing wastewater treatment plant. By changing the infiltration regime, it is conclusively shown that HCH removal is the result of the biological degradation and stimulated by the addition of methanol as electron donor. To our knowledge, this is the first successful field demonstration of the stimulated transformation of HCH to intermediates in a full scale anaerobic in situ bioscreen, combined with an aerobic on site treatment to harmless end products.
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