The removal kinetic characteristic and mechanism of cadmium by growing Rhodobacter sphaeroides were investigated. The removal data were fitted to the second-order equation, with a correlation coefficient, R2 = 0.9790-0.9916. Furthermore, it was found that the removal mechanism of cadmium was predominantly governed by bioprecipitation as cadmium sulfide with biosorption contributing to a minor extent. Also, the results revealed that the activities of cysteine desulfhydrase in strains grown in the presence of 10 and 20 mg/l of cadmium were higher than in the control, while the activities in the presence of 30 and 40 mg/l of cadmium were lower than in the control. Content analysis of subcellular fractionation showed that cadmium was mostly removed and transformed by precipitation on the cell wall. © 2008 Elsevier Ltd. All rights reserved.
CITATION STYLE
Bai, H. J., Zhang, Z. M., Yang, G. E., & Li, B. Z. (2008). Bioremediation of cadmium by growing Rhodobacter sphaeroides: Kinetic characteristic and mechanism studies. Bioresource Technology, 99(16), 7716–7722. https://doi.org/10.1016/j.biortech.2008.01.071
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