Equilibrium, Kinetics and Thermodynamic Studies for Adsorption of Hg (II) on Palm Shell Powder

World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering Pub Date : 2008-07-29 DOI:10.5281/ZENODO.1057703

S. Kushwaha, S. Sodaye, P. Padmaja

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引用次数: 34

Abstract

Palm shell obtained from coastal part of southern India was studied for the removal for the adsorption of Hg (II) ions. Batch adsorption experiments were carried out as a function of pH, concentration of Hg (II) ions, time, temperature and adsorbent dose. Maximum removal was seen in the range pH 4.0- pH 7.0. The palm shell powder used as adsorbent was characterized for its surface area, SEM, PXRD, FTIR, ion exchange capacity, moisture content, and bulk density, soluble content in water and acid and pH. The experimental results were analyzed using Langmuir I, II, III, IV and Freundlich adsorption isotherms. The batch sorption kinetics was studied for the first order reversible reaction, pseudo first order; pseudo second order reaction and the intra-particle diffusion reaction. The biomass was successfully used for removal Hg (II) from synthetic and industrial effluents and the technique appears industrially applicable and viable. Keywords—Biosorbent, mercury removal, borassus flabellifer, isotherms, kinetics, palm shell.

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棕榈壳粉吸附Hg (II)的平衡、动力学和热力学研究

研究了印度南部沿海棕榈壳对汞(II)离子的去除作用。以pH、Hg (II)离子浓度、时间、温度和吸附剂剂量为变量，进行了批量吸附实验。pH值在4.0 ~ 7.0范围内去除率最高。对作为吸附剂的棕榈壳粉进行了表面积、SEM、PXRD、FTIR、离子交换容量、含水率、容重、水、酸可溶性含量、ph值等表征，并采用Langmuir I、II、III、IV和Freundlich吸附等温线对实验结果进行了分析。研究了准一级可逆反应的间歇吸附动力学;伪二级反应和粒子内扩散反应。生物质已成功地用于从合成和工业废水中去除汞(II)，该技术在工业上是适用的和可行的。关键词:生物吸附剂，除汞，牛角藻，等温线，动力学，棕榈壳。

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World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering

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