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Kinetic studies of Pb and Ni adsorption onto MCM-41 amine-functionalized nano particle

机译：MCM-41胺官能化纳米粒子吸附Pb和Ni的动力学研究

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In the current investigation a novel nano hybrid adsorbent MCM-41/N-(3-trimethoxysilyl)-propyl)diethylenetriamine (MCM-41/TMSPDETA) was prepared and was characterized using DLS (Dynamic Light Scattering), Fourier Transform Infrared (FTIR), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analytical techniques and Transmission electron microscopy (TEM). The synthesized MCM-41/TMSPDETA adsorbent possessed high surface area (867 m2g?1), narrow pore size distribution (3.6 nm) and pore volume (0.782 cm3g?1). The nano hybrid adsorbent was applied in batch experiments under different controlling factors by varing pH, contact time and solution temperature of Lead (Pb(II)) and Nickel (Ni(II)) ions. Optimum conditions obtained were 20°C, pH=6 and contact time of 120 min. The maximum capacity of the nano-sorbent was obtained to be 58.823 and 20.921 mg g?1 for Pb (II) and Ni (II) ions for an initial concentration range 10-70 mgL-1. Pseudo-first order, pseudo-second order and intraparticle diffusion models were used to analyze the kinetic data. Results showed that the pseudo-second order model can well describe the adsorption kinetic data.
机译：在当前的研究中，制备了新型纳米杂化吸附剂MCM-41 / N-（3-三甲氧基甲硅烷基）-丙基）二亚乙基三胺（MCM-41 / TMSPDETA），并使用DLS（动态光散射），傅立叶变换红外（FTIR）进行了表征，X射线衍射（XRD），Brunauer-Emmett-Teller（BET）分析技术和透射电子显微镜（TEM）。合成的MCM-41 / TMSPDETA吸附剂具有高的表面积（867m2g-1），窄的孔径分布（3.6nm）和孔体积（0.782cm3g-1）。通过改变铅，铅（Pb（II））和镍（Ni（II））离子的pH值，接触时间和溶液温度，在不同的控制因素下，将纳米杂化吸附剂应用于分批实验中。获得的最佳条件是20°C，pH = 6，接触时间为120分钟。对于初始浓度范围为10-70 mgL-1的Pb（II）和Ni（II）离子，纳米吸附剂的最大容量为58.823和20.921 mg g？1。伪一级，伪二级和粒子内扩散模型用于分析动力学数据。结果表明，伪二级模型可以很好地描述吸附动力学数据。

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