화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.30, No.2, 369-378, February, 2013
DOI10.1007/s11814-012-0127-8  Export Citation
Batch and continuous (fixed-bed column) biosorption of Cu(II) by Tamarindus indica fruit shell
Shamik Chowdhury†, and Papita Das Saha
  • Department of Biotechnology, National Institute of Technology-Durgapur, Mahatma Gandhi Avenue, Durgapur 713209, West Bengal, India
E-mail:
The feasibility of employing Tamarindus indica (tamarind) fruit shell (TFS) as low-cost biosorbent for removal of Cu(II) from aqueous solutions was investigated. Batch experiments were carried out as function of initial solution pH (2-7), contact time (10-240 min), initial Cu(II) concentration (20-100 mg L^(-1)), biosorbent dose (0.5-5 g) and temperature (293-313 K). Biosorption equilibrium data were well described by the Langmuir isotherm model with maximum biosorption capacity of 80.01 mg g^(-1) at 313 K. Biosorption of Cu(II) followed pseudo-second-order kinetics. Gibbs free energy (ΔG°) was spontaneous for all interactions, and the biosorption process exhibited endothermic enthalpy values. To ascertain the practical applicability of the biosorbent, fixed-bed column studies were also performed. The breakthrough time increased with increasing bed height and decreased with increasing flow rate. The Thomas model as well as the Bed Depth Service Time (BDST) model was fitted to the dynamic flow experimental data to determine the column kinetic parameters useful for designing large-scale column studies. The Thomas model showed good agreement with the experimental results at all the process parameters studied. It could be concluded that TFS may be used as an inexpensive and effective biosorbent without any treatment or any other modification for the removal of Cu(II) ions from aqueous solutions.
Keywords:Biosorption;Cu(II);Tamarindus indica Fruit Shell;Batch;Fixed-bed Column
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