Amine modified tannin gel for adsorptive removal of Brilliant Green dye

被引：85

作者：

Akter, Nahida ^{[1
,2
]}

Hossain, Md. Asjad ^{[1
]}

Hassan, M. Jobaer ^{[1
]}

Amin, M. K. ^{[1
,3
]}

Elias, M. ^{[1
,4
]}

Rahman, Mohammed M. ^{[5
,6
]}

Asiri, Abdullah M. ^{[5
,6
]}

Siddiquey, Iqbal A. ^{[1
]}

Hasnat, Mohammad A. ^{[1
]}

机构：

[1] Shahjalal Univ Sci & Technol, Dept Chem, Sylhet 3114, Bangladesh

[2] Univ Barisal, Dept Chem, Barisal 8200, Bangladesh

[3] Khulna Univ, Chem Discipline, Khulna 9208, Bangladesh

[4] Jagannath Univ, Dept Chem, Dhaka 1100, Bangladesh

[5] King Abdulaziz Univ, Fac Sci, CEAMR, POB 80203, Jeddah 21589, Saudi Arabia

[6] King Abdulaziz Univ, Fac Sci, Dept Chem, POB 80203, Jeddah 21589, Saudi Arabia

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2016年 / 4卷 / 01期

关键词：

Tannin gel; Amine modified tannin gel; Adsorption; Brilliant Green;

D O I：

10.1016/j.jece.2016.01.013

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The potentiality of tannin gel (TG) and amine modified tannin gel (ATG) has been found as highly effective, eco-friendly and cheap adsorbents for removal of Brilliant Green (BG) dye. In each case, the most efficient adsorption occured at pH 7 with 88.38% for TG and 94.05% removal for ATG, respectively. The adsorption kinetics for TG was found to follow pseudo-first-order kinetic model along with intraparticle diffusion, and for ATG it was found to follow pseudo-second order kinetic model. The experimental data were found to best fit with langmuir isotherm (r(2) > 0.99 for both gels) with maximum monolayer adsorption capacity of 8.55 mg/g for TG and 20.41 mg/g for ATG. The negative values of Gibb's free energy (Delta G degrees) of both gels indicate the spontaneous nature of the adsorption process. The positive values of Delta H degrees with respect to both gels suggest the endothermic adsorption nature along with positive values of entropy changes (Delta S degrees). (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1231 / 1241

页数：11

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