Kaolin-issued zeolite, A as efficient adsorbent for Bezanyl Yellow and Nylomine Green anionic dyes

被引：22
作者：
Fardjaoui, Nor-El-Houda [1 ]
El Berrichi, Fatima Zohra [1 ]
Ayari, Faouzi [2 ,3 ]
机构：
[1] Univ 8 Mai 1945, Fac Mathemat & Informat & Sci Matiere, Lab Chim Phys, BP 401, Guelma, Algeria
[2] Univ Tunis El Manar, Fac Sci Tunis, Lab Chim Mat & Catalyse, Tunis 2092, Tunisia
[3] Univ Monastir, Fac Pharm Monastir, Rue Avicenne, Monastir 5000, Tunisia
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2017年 / 243卷
关键词：
Bezanyl Yellow; Nylomine Green; DD3; Zeolite A; Topological polar surface areas (TPSA); AQUEOUS-SOLUTIONS; CATIONIC DYES; SURFACE-AREA; REMOVAL; ADSORPTION; TEMPERATURE; PRODUCTS; KINETICS; ISOTHERM; CR(III);
D O I：
10.1016/j.micromeso.2017.01.008
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Zeolite A was synthesized by the autoclave method in alkaline medium using the DD3 Algerian clay, and then characterized by SEM, XRF, N-2 physisorption at -196 degrees C, and XRD. In the temperature range 25 -60 degrees C, the synthesized zeolite A can be efficiently used for Bezanyl Yellow (BY) and Nylomine Green (NG) adsorption (25 mg L-1) at very low adsorbent doses (5x 10(-4) g(zeolite A) g(solution)(-1)) and neutral pH (similar to 7). The changes of free energy (Delta G degrees), enthalpy (Delta H degrees), and entropy (Delta S degrees) during physisorption were carefully evaluated. On the other hand, Freundlich isotherm and pseudo-second-order kinetics were found to be the most appropriate models to describe the endothermic physisorption of BY (E-a = 23.4 +/- 1 kJ mol(-1)) and NG (E-a = 18.34 kJ mol(-1)). The synthesized zeolite A exhibited superior adsorption capacities and percentages of anionic dyes removal compared to DD3, bentonite and commercial zeolite A. (C) 2017 Elsevier Inc. All rights reserved.
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页码：91 / 101
页数：11
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