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首页> 外文期刊>Journal of Molecular Liquids >Fabrication of chitosan-g-poly(acrylamide)/Cu nanocomposite for the removal of Pb(II) from aqueous solutions
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Fabrication of chitosan-g-poly(acrylamide)/Cu nanocomposite for the removal of Pb(II) from aqueous solutions

机译：壳聚糖-g-聚丙烯酰胺/铜纳米复合材料的制备，用于从水溶液中去除铅（II）

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摘要

In this study, CPA/Cu nanocomposite was applied as significant biosorbent for effective removal of Pb(II) from aquatic solution in environmental conditions. CPA/Cu was characterized through differ instrumental techniques like as x-ray diffractometer (XRD), SEM, FT-IR spectroscopy and TEM. Here, SEM and TEM images are clearly showed porous structure of the CPA/Cu nanocomposite within nanodimension. Various adsorption parameters like metal ion concentration, adsorbent dosage, pH effect, contact time and temperature effect were optimized. Langmuir and Freundlich models were studied to simulate the adsorption of Pb(II) through experimental data. Freundlich model was initiated for suitable q(e) of 38.93 mg/g. The kinetic study of nanocomposite was defined by pseudo-second-order and other thermodynamic parameters like as Delta S degrees, Delta H degrees and Delta G degrees were obtained -3.881 kJ/mol, -51.58 kJ/mol and -168.12 J/mol/K, respectively. The spontaneous and exothermic behavior of the reaction was inveterate by negative response of Delta G degrees and Delta H degrees. (C) 2016 Elsevier B.V. All rights reserved.
机译：在这项研究中，CPA / Cu纳米复合材料被用作重要的生物吸附剂，可在环境条件下有效地从水溶溶液中去除Pb（II）。通过不同的仪器技术，如X射线衍射仪（XRD），SEM，FT-IR光谱和TEM对CPA / Cu进行了表征。在这里，SEM和TEM图像清楚地显示了CPA / Cu纳米复合材料在纳米尺寸内的多孔结构。优化了各种吸附参数，如金属离子浓度，吸附剂用量，pH值，接触时间和温度效果。研究了Langmuir和Freundlich模型，通过实验数据模拟了Pb（II）的吸附。针对38.93 mg / g的合适q（e）启动Freundlich模型。纳米复合材料的动力学研究由拟二阶定义，其他热力学参数如Delta S度，Delta H度和Delta G度获得-3.881 kJ / mol，-51.58 kJ / mol和-168.12 J / mol /分别为K。 Delta G度和Delta H度的负响应会加剧反应的自发和放热行为。 （C）2016 Elsevier B.V.保留所有权利。

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