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首页> 外文会议>2011 International Conference on Materials for Renewable Energy Environment >Biosorption equilibrium and kinetics of copper (II) from aqueous solution using dead leaves of plane tree
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Biosorption equilibrium and kinetics of copper (II) from aqueous solution using dead leaves of plane tree

机译：平面树枯叶从水溶液中吸收铜（II）的生物吸附平衡和动力学

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The dead leaves of plane tree were investigated as a low-cost biosorbent for the removal of Cu2+ from aqueous solution in a batch system. Different environmental factors such as initial Cu2+ concentration, contact time, biosorbent dose, temperature and pH were studied. The sorption was found to be maximum in natural medium and increases with increase in initial concentration. Langmuir, Freundlich and Temkin isotherm model were applied to describe the biosorption of the metal ions onto biosorbent. Langmuir and Freundlich model fitted the equilibrium data better than the Temkin isotherm. Modeling of kinetic results shows that sorption process is best described by of the pseudo-second order model. intra-particle diffusion model indicated the adsorption of Cu2+ onto dead leaves is controlled by both external mass transfer and intra-particle diffusion.
机译：以一种低成本的生物吸附剂为原料，研究了从平面树的死叶中分离出水溶液中的Cu 2 + 的方法。研究了Cu 2 + 的初始浓度，接触时间，生物吸附剂量，温度和pH等不同的环境因素。发现吸附在天然介质中最大，并随初始浓度的增加而增加。用Langmuir，Freundlich和Temkin等温模型描述了金属离子在生物吸附剂上的生物吸附。 Langmuir和Freundlich模型比Temkin等温线更好地拟合了平衡数据。动力学结果的建模表明，吸附过程最好用伪二级模型来描述。颗粒内扩散模型表明，Cu 2 + 在死叶上的吸附受外部传质和颗粒内扩散的控制。

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