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首页> 外文期刊>Archives of Applied Science Research >Adsorption of Ni (II) from aqueous solution on Delonix regia (Gulmohar) tree bark
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Adsorption of Ni (II) from aqueous solution on Delonix regia (Gulmohar) tree bark

机译：地肤（Delonix regia（Gulmohar））树皮上从水溶液中吸附镍（II）

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摘要

The potential to remove Ni (II) from aqueous solutions through adsorption using Delonix regia (Gulmohar) tree bark was investigated. The effects of pH, contact time, initial concentration and adsorbent dosage on the adsorption of Ni (II) were studied. The different experimental conditions were investigated in this study. It was observed that the amount of Ni (II) adsorbed increases rapidly initially, then system approaches equilibrium within 90 minutes. The extent of Ni (II) removal increased with increase in time and adsorbent dosage. The reaction kinetics was studied using different models. Langmuir and Freundlich adsorption model is used for the mathematical description of the adsorption equilibrium and isotherm constants are evaluated. Equilibrium data fitted very well to the Langmuir and Freundlich model. The Langmuir adsorption capacity was found to be 4.81 mg/g. The Freundlich constants Kf and n were 0.4315 and 1.5715, respectively. The pseudo first- and second-order kinetic models were also applied to the experimental data. The data agreed very well with the pseudo second-order kinetic model.
机译：研究了使用Delonix regia（Gulmohar）树皮通过吸附从水溶液中去除Ni（II）的潜力。研究了pH，接触时间，初始浓度和吸附剂用量对Ni（II）吸附的影响。在这项研究中调查了不同的实验条件。观察到，最初吸附的Ni（II）的量迅速增加，然后系统在90分钟内达到平衡。 Ni（II）去除的程度随时间和吸附剂量的增加而增加。使用不同的模型研究了反应动力学。将Langmuir和Freundlich吸附模型用于吸附平衡的数学描述，并评估了等温线常数。平衡数据非常适合Langmuir和Freundlich模型。发现朗格缪尔的吸附容量为4.81mg / g。 Freundlich常数Kf和n分别为0.4315和1.5715。伪一阶和二阶动力学模型也被应用于实验数据。数据与伪二级动力学模型非常吻合。

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