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首页> 外文期刊>Chemical Science International Journal >Kinetic and Batch Equilibrium Adsorption of Nickel(II) and Copper (II) Ions from Aqueous Solution Onto Activated Carbon Prepared fromBalanites aegyptiaca Shells
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Kinetic and Batch Equilibrium Adsorption of Nickel(II) and Copper (II) Ions from Aqueous Solution Onto Activated Carbon Prepared fromBalanites aegyptiaca Shells

机译：水溶液中镍（II）和铜（II）离子在Balanites aegyptiaca壳制备的活性炭上的动力学和间歇平衡吸附

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The adsorption capacity of Nickel (Ni_(2)~(+)) and Copper (Cu~(2+)) ions from an aqueous solution by activated carbon prepared from Balanites aegyptiaca shells. Prepared activated carbon was characterized by Fourier transform infra red spectroscopy FTIR, and by determination of the iodine number and the carbonization yield. To implement the adsorption capacity of activated carbon, of the contact time, adsorbent mass, pH, initial concentration of the adsorbate and the addition of the sodium chloride electrolyte ( NaC l ). To analyze the adsorption mechanism, Langmuir isotherms, Freundlich models were studied. Dubinin-Kaganer-Radushkevich (D-K-R) as well as the kinetic models of pseudo-first order, pseudo-second order, Elovich and intra particulate diffusion. The iodine index gave a value of 550.11 mg/g. The adsorption equilibrium is quickly reached at the end of 10 min and 12 min for Ni~(2+) and Cu~(2+) ions respectively. The maximum adsorbed quantities are of 540 mg/g and 491 mg/g for Ni~(2+) and Cu~(2+ )ions respectively. These values are slightly higher than the quantities calculated by the Langmuir model, which implies better adsorbates adsorption on the activated carbon. Adsorption took place in an acidic medium with optimal pH values of 4 and 5 for the Ni~(2+) and Cu~(2+) ions respectively. The pseudo-first order and pseudo-second order models describe the kinetics adsorption of Ni~(2+) and Cu~(2+) ions respectively. The addition of NaCl electrolyte showed a very significant increase in the adsorbed quantities, because of increase in the ionic force of the solution. This study revealed that activated carbon obtained from Balanites aegyptiaca shells is a good adsorbent for the elimination of Ni~(2+) and Cu~(2+) ions from aqueous solution.
机译：铝钡贝壳制备的活性炭对水溶液中镍（Ni_（2）〜（+））和铜（Cu〜（2+））离子的吸附能力。制备的活性炭通过傅立叶变换红外光谱FTIR表征，并通过测定碘值和碳化产率来表征。为了实现活性炭的吸附能力，接触时间，吸附剂质量，pH，被吸附物的初始浓度以及添加氯化钠电解质（NaCl）。为了分析吸附机理，研究了Langmuir等温线，Freundlich模型。 Dubinin-Kaganer-Radushkevich（D-K-R）以及伪一级，伪二级，Elovich和内部微粒扩散的动力学模型。碘指数为550.11 mg / g。 Ni〜（2+）和Cu〜（2+）离子分别在10分钟和12分钟时迅速达到吸附平衡。 Ni〜（2+）和Cu〜（2+）离子的最大吸附量分别为540 mg / g和491 mg / g。这些值略高于由Langmuir模型计算的量，这意味着活性炭上的吸附物吸附效果更好。 Ni_（2+）和Cu〜（2+）离子分别在最适pH值为4和5的酸性介质中发生吸附。伪一级和伪二级模型分别描述了Ni〜（2+）和Cu〜（2+）离子的动力学吸附。由于溶液离子力的增加，添加氯化钠电解质显示出吸附量的显着增加。这项研究表明，从Balanites aegyptiaca壳中获得的活性炭是从水溶液中消除Ni〜（2+）和Cu〜（2+）离子的良好吸附剂。

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