Journal
CHEMICAL ENGINEERING JOURNAL
Volume 181, Issue -, Pages 352-359Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2011.11.091
Keywords
Bacteria; Bioremediation; Isotherm; Metal; Removal
Categories
Funding
- Consejo Nacional de Ciencia y Tecnologia
- PAPIIT of the DGAPA-UNAM [IN 109309-3]
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To determine the effects of pH, salinity and temperature on the Cu and Pb biosorption capacities of the subtropical estuarine bacteria Bacillus thioparans strain U3, batch experiments were performed under a variety of laboratory conditions. Of the eight kinetic models employed, the pseudo-second order (PSO) model provided the best fit for the experimental data for both metals. The optimal conditions for Cu biosorption were at pH 6 and 25 degrees C, while Pb biosorption was maximised at pH 4 and 35 degrees C. Zero salinity was optimal for both metals. The experimental data fit the Langmuir adsorption model well. The maximum Cu and Pb biosorption capacities of B. thioparans U3 suggest that the bacterium can be a suitable biosorbent for these metals. (C) 2011 Elsevier B.V. All rights reserved.
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