期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 62, 期 2, 页码 195-203出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2008.01.008
关键词
biosorption; Pseudomonas aeruginosa; heavy metals; langmuir; Freundlich isotherm
The optimum conditions for biosorption and bioaccumulation of lead and nickel were investigated by using a tolerant bacterial strain isolated from El-Malah canal, Assiut, Egypt, and identified as Pseudomonas aeruginosa ASU 6a. The experimental adsorption data were fitted towards the models postulated by Langmuir and Freundlich isotherm equations. The binding capacity by living cells is significantly lower than that of dead cells. The maximum biosorption capacities for lead and nickel obtained by using non-living cells and living cells were 123, 113.6 and 79, 70 mg/g, respectively. The biosorptive mechanism was confirmed by I R analysis and from the identification nature of acidic and basic sites. Moreover, the postulated mechanism was found to depend mainly on ionic interaction and complex formation. (C) 2008 Elsevier Ltd. All rights reserved.
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