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  • Title: Mineralisation of 2,6-dichlorobenzamide (BAM) in dichlobenil-exposed soils and isolation of a BAM-mineralising Aminobacter sp.
    Author: Simonsen A, Holtze MS, Sørensen SR, Sørensen SJ, Aamand J.
    Journal: Environ Pollut; 2006 Nov; 144(1):289-95. PubMed ID: 16515829.
    Abstract:
    Mineralisation of the groundwater contaminant 2,6-dichlorobenzamide (BAM), a metabolite from the herbicide 2,6-dichlorobenzonitrile (dichlobenil), was studied in soil samples obtained from 39 locations previously exposed to dichlobenil. Rapid BAM mineralisation was detected in samples from six locations with 5.2-64.6% of the added BAM mineralised within 48-50 days. From one location rapid BAM mineralisation was observed in soil samples down to a depth of 2 m below the surface. One location with fast BAM mineralisation showed significant dichlobenil degradation activity with 25.5% of the added dichlobenil being mineralised within 50 days. By inoculating soil showing the fastest mineralisation of BAM into a mineral medium with BAM as the only carbon and nitrogen source an enrichment culture was established. Community analysis based on extracted DNA revealed a change of the bacterial community but without any clear indication of key members within the BAM-mineralising culture. Parallel cultivation resulted for the first time in the isolation of a BAM-mineralising bacterium, identified as an Aminobacter sp.
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