کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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866102 | 909703 | 2015 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Biogenic sulfides for sequestration of Cr (VI), COD and sulfate from synthetic wastewater Biogenic sulfides for sequestration of Cr (VI), COD and sulfate from synthetic wastewater](/preview/png/866102.png)
The aim of this work is to explore the possibility of using mixed culture of mesophilic sulfate-reducing bacteria (SRB) for retrieval of toxic and carcinogenic Cr (VI) from synthetic solution. In order to treat Cr (VI) containing wastewater effectively, SRB culture was adapted to 50 mg/L Cr (VI) and maintained through repeated sub-culturing to enhance the growth and activity of SRB. Batch biosorption experiments were carried out in glass serum vials by cultured SRB, accomplishing the removal of 82.1% Cr (VI), 76.9% sulfate, 85.7% COD under the following optimized conditions: pH 7, hydraulic retention time (HRT) 7 days, temperature 37 °C and initial Cr (VI) concentration of 50 mg/L. Further sorption experiments were conducted on synthetic wastewater under optimal operational conditions and resulted in 89.2% Cr (VI), 81.9% COD and 95.3% sulfate reduction from simulated wastewater. The results of this work contributed to a better understanding of metal uptake by biogenic sulfides and would be beneficial in the development of potential biosorbents that possess high capacities for Cr (VI) uptake from aqueous environments.
Journal: Water Science - Volume 29, Issue 1, April 2015, Pages 19–25