Kinetic and Thermodynamic Studies of Ni(II) Adsorption onto Activated Carbon of Abelmoschus manihot from Aqueous Solutions

被引：3

作者：

Murthy, Z. V. P. ^{[1
]}

Vijayaragavan, K. ^{[1
]}

Pant, K. K. ^{[2
]}

机构：

[1] SV Natl Inst Technol Surat, Dept Chem Engn, Surat 395007, Gujarat, India

[2] Indian Inst Technol Delhi, Dept Chem Engn, New Delhi, India

来源：

JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2013年 / 34卷 / 07期

关键词：

Abelmoschus manihot; adsorption; kinetics; physisorption; MONTMORILLONITE-ILLITE TYPE; WASTE-WATER; CYSTOSEIRA-INDICA; CARICA-PAPAYA; HEAVY-METALS; REMOVAL; CU(II); BIOSORPTION; SORPTION; ACID;

D O I：

10.1080/01932691.2012.731644

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Adsorption behavior of Ni(II) onto activated carbon of Abelmoschus manihot (AC-AM) is studied as a function of temperature and time under optimized adsorbent dosage, pH, and concentration of adsorbate. In order to investigate the kinetic mechanism of adsorption and potential rate controlling steps; Lagergren pseudo-first-order, Elovich, Ritchie, Blanchard, second-order, intraparticle diffusion, and pseudo-second-order kinetic models have been used to fit the experimental data. Out of all the models tested, the pseudo-second-order kinetic model provided the best fit in the present case. Thermodynamic study revealed that nickel adsorption onto AC-AM is exothermic in nature and adsorption is spontaneous. The estimated thermodynamic parameters indicate that the adsorption follows physisorption, with nickel removal as high as 94%.

引用

页码：923 / 931

页数：9

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