Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
691147 | Journal of the Taiwan Institute of Chemical Engineers | 2014 | 12 Pages |
Abstract
The adsorption of Cd(II) ions from synthetic wastewater was performed using two types of newly prepared adsorbent: (i). Surface modified Eucalyptus seeds by sulphuric acid (SMES-S) and (ii). Surface modified Eucalyptus seeds by hydrochloric acid (SMES-H). SMES-S showed better performance for the Cd(II) ions removal than the SMES-H. The thermodynamics of the Cd(II) ions-SMES system was feasible, spontaneous and exothermic in nature. The maximum monolayer adsorption capacities of the adsorbents were found to be 71.15Â mg/g (SMES-S) and 64.16Â mg/g (SMES-H). The kinetics of the system followed the pseudo-second order kinetic model. The effective diffusivity values were calculated for the SMES-S: 2.0578Â ÃÂ 10â11, 2.2641Â ÃÂ 10â11, 2.3382Â ÃÂ 10â11, 2.5022Â ÃÂ 10â11 and 2.5445Â ÃÂ 10â11Â m2/s for the initial Cd(II) ions concentration from 20 to 100Â mg/L, respectively. The SMES-S can be used as an effective adsorbent for the removal of Cd(II) ions.
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Authors
U. Pearlin Kiruba, P. Senthil Kumar, C. Prabhakaran, V. Aditya,