Article ID Journal Published Year Pages File Type
691147 Journal of the Taiwan Institute of Chemical Engineers 2014 12 Pages PDF
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 71.15 mg/g (SMES-S) and 64.16 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: 2.0578 × 10−11, 2.2641 × 10−11, 2.3382 × 10−11, 2.5022 × 10−11 and 2.5445 × 10−11 m2/s for the initial Cd(II) ions concentration from 20 to 100 mg/L, respectively. The SMES-S can be used as an effective adsorbent for the removal of Cd(II) ions.
Related Topics
Physical Sciences and Engineering Chemical Engineering Process Chemistry and Technology
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