Removal of malachite green from aqueous solution using waste pea shells as low-cost adsorbent - adsorption isotherms and dynamics

被引：56

作者：

Khan, Tabrez A. ^{[1
]}

Rahman, Rumana ^{[1
]}

Ali, Imran ^{[1
]}

Khan, Equbal A. ^{[1
]}

Mukhlif, Amer A. ^{[1
]}

机构：

[1] Jamia Millia Islamia, Dept Chem, New Delhi 110025, India

来源：

TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY | 2014年 / 96卷 / 04期

关键词：

adsorption; pseudo-second order; waste pea shells; malachite green; freundlich isotherm; thermodynamic parameters; REACTIVE DYES; SORPTION; KINETICS; STRAW; WATER; ACID; PEEL;

D O I：

10.1080/02772248.2014.969268

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorptive removal of malachite green (MG) from aqueous solution using waste pea shells (Pisum sativum L.) is reported. Optimized conditions for maximum uptake were established. The adsorption was best described by the Freundlich model. A pseudo-second-order kinetic model correlated best with the data. Liquid-film and intra-particle diffusion control the overall process. Thermodynamic parameters indicated that adsorption was spontaneous, endothermic, and accompanied with an increase in entropy. Low contact time and high removal efficiency at natural pH of water recommend pea shells as efficient low-cost adsorbent for removal of MG from wastewaters.

引用

页码：569 / 578

页数：10

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