• copper biosorption and ions release by stenotrophomonas maltophilia in the presence of benzo[a]pyrene

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 543
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     to investigate metal biosorption in polluted environments where organic and inorganic pollutants coexisted, this study has focused on the removal of cu(no3)2 by stenotrophomonas maltophilia in the presence of benzo[a]pyrene (bap). initial ph, biosorbent dosage, contact time and bap concentration were the significant factors for cu biosorption. the uptake capacities of 2 and 10 mg l−1 cu(ii) by 0.25 g l−1s. maltophilia were 7 and 26 mg g−1 at 0.5 h, respectively. cu(ii) biosorption included bioaccumulation, ions and macromolecules release, ca2+ and mg2+ exchange, functional groups attraction, and cu(ii) and no3- bioreduction. during the biosorption process, s. maltophilia metabolically released k+, and metabolically independently exchanged mg2+ and ca2+ for cu(ii) bioaccumulation. when the initial concentration of cu(ii) was 2 or 10 mg l−1, the coexisted 1 mg l−1 bap showed no significant influence on cu(ii) biosorption, ions release and cellular morphology.

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