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首页> 外文期刊>Journal of industrial and engineering chemistry >Copper biosorption by pine cone shell and thermal decomposition study of the exhausted biosorbent
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Copper biosorption by pine cone shell and thermal decomposition study of the exhausted biosorbent

机译：松锥壳对铜的吸附及废生物吸附剂的热分解研究

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Pine cone shell (PCS), a vegetable solid waste has been used as effective and efficient biosorbent for the removal of Cu(II) from aqueous solutions. The biosorbent was characterized by elemental analysis, potentiometric titrations, surface area and pore size distribution and FTIR analyses. Batch adsorption experiments were carried out as a function of solution pH, particle size, biosorbent dosage, contact time, and initial metal ion concentration. Then, equilibrium isotherms and kinetic data parameters were evaluated. Equilibrium data agreed well with Langmuir isotherm model. The biosorption capacities of PCS for Cu(II) were determined at 25 °C with the Langmuir model as 6.81 mg/g. The kinetics data fitted well into the pseudo-second-order model with correlation coefficient greater than 0.99. Also, dynamic biosorption studies were carried out using a packed-bed column and the main column parameters were determined. Pine cone shell was shown to be a promising biosorbent for Cu(II) removal from aqueous solutions. Finally, the pyrolysis characteristics of native PCS and Cu-loaded PCS were investigated by thermogravimetric analysis (TGA) in order to study the possible recycling of PCS after its use as biosorbent of copper.
机译：松果壳（PCS）是一种植物性固体废物，已被用作从水溶液中去除Cu（II）的有效生物吸附剂。通过元素分析，电位滴定，表面积和孔径分布以及FTIR分析来表征生物吸附剂。分批吸附实验是根据溶液pH，粒度，生物吸附剂剂量，接触时间和初始金属离子浓度进行的。然后，评估平衡等温线和动力学数据参数。平衡数据与Langmuir等温线模型非常吻合。在25°C下用Langmuir模型测得PCS对Cu（II）的生物吸附能力为6.81 mg / g。动力学数据很好地拟合到伪二阶模型中，相关系数大于0.99。此外，使用填充床色谱柱进行了动态生物吸附研究，并确定了色谱柱的主要参数。松果壳被证明是从水溶液中去除Cu（II）的有前途的生物吸附剂。最后，通过热重分析（TGA）研究了天然PCS和负载铜的PCS的热解特性，以研究PCS用作铜的生物吸附剂后可能的循环利用。

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