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A Study of the Removal Characteristics of Cu (II) Ions from Aqueous Solutions by a Low-Cost Adsorbent

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dc.contributor.author Jayakodiarachchi, N.
dc.contributor.author Jayaweera, C.D.
dc.date.accessioned 2017-03-24T09:55:21Z
dc.date.available 2017-03-24T09:55:21Z
dc.date.issued 2015
dc.identifier.citation Jayakodiarachchi, N., & Jayaweera, C.D. (2015). A Study of the Removal Characteristics of Cu (II) Ions from Aqueous Solutions by a Low-Cost Adsorbent. Proceedings of the Twentieth International Forestry and Environment Symposium, University of Sri Jayewardenepura, Nugegoda. en_US, si_LK
dc.identifier.uri http://dr.lib.sjp.ac.lk/handle/123456789/4575
dc.description.abstract Heavy metal pollution has become one of the most critical environmental problems throughout the world today, since they persist in the environment without degradation. Present study explored the feasibility of using Jack wood sawdust as a low cost adsorbent, for the removal of Cu (II) ions from aqueous solutions. Batch mode process was carried out to investigate the effect of contact time, initial metal concentration, particle size, pH and temperature with the dosage of 0.500 g sawdust treated with 0.1%V/V sodium hydroxide. Maximum adsorption for Cu (II) was observed at a pH range of 6-7 having the particle size 107-150 µm. Percentage removal of Cu (ll) increased when temperature was varied from 20°C to 70 °C. Langmuir, Freundlich and D-R isotherms were obtained at 30±0.2 °C. Applicability of pseudo-first order, pseudo-second order, intra-particle diffusion and liquid film diffusion kinetic models were investigated at 30±0.2 °C. Cu (II) removal by Jackwood sawdust obeyed pseudo-second order kinetic model, Langmuir and D-R isotherms. Maximum removal capacity obtained from Langmuir and D-R isotherms are 6.26 and 5.51 mg g-1 respectively. Thermodynamic parameters ΔG, ΔS and ΔH obtained for the removal were -8, 52 kJ mol-1 and 0.2 kJ mol-1 K-1 respectively indicating the removal process is favourable and spontaneous. IR analysis of sawdust before and after the removal of Cu(II) was carried out to identify the possible functional groups responsible for the removal and significant changes in the intensities of functional groups of metal loaded sawdust was observed with shifts in positions of some peaks. Ultimately this research can be considered as a demonstration of using a waste material (sawdust) having low economic value to solve an environmental problem such as decontamination of industrial effluents. en_US, si_LK
dc.language.iso en en_US, si_LK
dc.publisher University of Sri Jayewardenepura, Nugegoda en_US, si_LK
dc.subject Jack wood sawdust en_US, si_LK
dc.subject Heavy metals en_US, si_LK
dc.title A Study of the Removal Characteristics of Cu (II) Ions from Aqueous Solutions by a Low-Cost Adsorbent en_US, si_LK
dc.type Article en_US, si_LK

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