Application of central composite design for simultaneous removal of methylene blue and Pb2+ ions by walnut wood activated carbon

被引：162

作者：

Ghaedi, M. ^{[1
]}

Mazaheri, H. ^{[1
]}

Khodadoust, S. ^{[2
]}

Hajati, S. ^{[3
]}

Purkait, M. K. ^{[4
]}

机构：

[1] Univ Yasuj, Dept Chem, Yasuj 7591874831, Iran

[2] Yasuj Univ Med Sci, Cellular & Mol Res Ctr, Yasuj, Iran

[3] Univ Yasuj, Dept Phys, Yasuj 7591874831, Iran

[4] Indian Inst Technol Guwahati, Dept Chem Engn, Gauhati 781039, India

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2015年 / 135卷

关键词：

Central composite design; Simultaneous removal; Methylene blue; Pb2+ ions; walnut wood activated carbon; LIQUID-LIQUID MICROEXTRACTION; AQUEOUS-SOLUTION; WASTE-WATER; HEAVY-METAL; COMPETITIVE ADSORPTION; DYE ADSORPTION; KINETIC-MODEL; SORPTION; ACID; OPTIMIZATION;

D O I：

10.1016/j.saa.2014.06.138

中图分类号：

O433 [光谱学];

学科分类号：

070207 [光学];

摘要：

Activated carbon was prepared from walnut wood which was locally available, non-toxic, abundant and cheap. This new adsorbent was characterized using BET, FTIR and SEM. Point of zero charge (pH(pzc)) and oxygen containing functional groups were also determined. The prepared adsorbent was applied for simultaneous removal of Pb2+ ions and methylene blue (MB) dye from aqueous solution. The prominent effect and interaction of variables such as amount of adsorbent, contact time, concentration of MB and Pb2+ ions were optimized by central composite design. The equilibrium data obtained at optimum condition were fitted to conventional isotherm models and found that Langmuir model was the best fitted isotherm. Kinetic data were fitted using various models. It was revealed that the adsorption rate follows pseudo-second order kinetic model and intraparticle diffusion model. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：479 / 490

页数：12

共 64 条

[1]

Removal of lead(II) from wastewater by activated carbon developed from Tamarind wood by zinc chloride activation [J].