Biosorption of strontium ion by immobilised Aspergillus niger
by Xiangliang Pan, Xianlin Meng, Daoyong Zhang, Jianlong Wang
International Journal of Environment and Pollution (IJEP), Vol. 37, No. 2/3, 2009

Abstract: Biosorption of strontium by Aspergillus niger immobilised in calcium alginate has been studied. The experimental data showed that immobilised A. niger was effective in removing Sr²⁺ from aqueous solution. The optimal pH and temperature were 3.0LC and 25LC, respectively. Pseudo second-order model was applicable to all the sorption data over the entire time range. Intraparticle diffusion was not the only rate-limiting step. Sorption data conformed well to both Langmuir and Freundlich isotherm model. The maximum adsorption capacity (q_max) niger was 751.88mg/g. The FT-IR analysis showed that the mechanism involved in biosorption of Sr²⁺ by A. niger was mainly attributed to Sr²⁺ binding of groups of amide groups I and II.

Online publication date: Wed, 13-May-2009

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