Comparative study of calcium alginate, activated carbon, and their composite beads on methylene blue adsorption

被引：291

作者：

Hassan, A. F. ^{[1
]}

Abdel-Mohsen, A. M. ^{[2
,4
]}

Fouda, Moustafa M. G. ^{[3
,4
]}

机构：

[1] Damanhour Univ, Fac Sci, Dept Chem, Damanhour, Egypt

[2] Brno Univ Technol, Cent European Inst Technol CEITEC, Brno, Czech Republic

[3] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia

[4] Natl Res Ctr, Text Res Div, Giza 12522, Egypt

来源：

CARBOHYDRATE POLYMERS | 2014年 / 102卷

关键词：

Alginate beads; Composite; Activated carbon; Coconut shells; Methylene blue; AQUEOUS-SOLUTION; REMOVAL; EQUILIBRIUM; MECHANISM; KINETICS; BATCH; DYE;

D O I：

10.1016/j.carbpol.2013.10.104

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Three adsorbents, calcium alginate beads (AB), sodium hydroxide activated carbon based coconut shells (C), and calcium alginate/activated carbon composite beads (ACB) were prepared. Their textural properties were characterized by N-2-adsorption at 196 degrees C and scanning electron microscopy. The porosity, surface area and total pore volume of C > ACB > AB, but AB adsorbent was more acidic function groups more than the other adsorbents. Adsorption experiments were conducted to examine the effects of adsorbent dosage, pH, time, temperature and initial concentration of methylene blue. Methylene blue adsorption on C, AB and ACB was observed at pH > 6 to avoid the competition of H+. The amount of dye adsorbed increases as the adsorbent dosage increase. Adsorption of dye follows pseudo-second order mechanism. Thermodynamic studies show spontaneous and endothermic nature of the overall adsorption process. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：192 / 198

页数：7

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