Sorption of nickel on chitosan |
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Authors: | L Pivar?iová O Rosskopfová M Galambo? P Rajec |
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Institution: | 1. Faculty of Natural Sciences, Department of Nuclear Chemistry, Comenius University in Bratislava, Mlynská Dolina, 842 15, Bratislava, Slovak republic
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Abstract: | The sorption of nickel on chitosan was studied using batch method. As a tracer was used radioisotope 63Ni. The effect of pH and contact time to reach sorption equilibrium was investigated. During the sorption of Ni2+ ions occur mostly to ion-exchange reactions on the surface of sorbent. The time to reach the sorption equilibrium of nickel on chitosan was 14 h. The percentage of sorption after 14 h achieved the value of 84 %. On the sorption of nickel used solutions with initial pH in the range from 3.9 to 8.1. In the monitored range of pH after 24 h of contact was the sorption of nickel on chitosan >97 %. The sorption of nickel was reduced by increasing concentrations of Ni2+ ions in the solution. The experimental data for sorption of nickel have been interpreted in the term of Langmuir isotherm and the value of maximum sorption capacity of nickel on chitosan was 2.71 × 10?3 mol g?1. |
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