Cd2+ removal from synthetic waters by ZnCl2-activated carbon

被引：8
作者：
Madankar, Chandu S. [1 ]
Bhagwat, Sunil S. [1 ]
Meshram, Pawan D. [2 ]
机构：
[1] Inst Chem Technol, Mumbai 400019, Maharashtra, India
[2] KBC North Maharashtra Univ, Univ Inst Chem Technol, Jalgaon 425001, Maharashtra, India
来源：
MATERIALS TODAY-PROCEEDINGS | 2021年 / 45卷
关键词：
Adsorption; Pine-fruit residue; Cadmium; Isotherm; Kinetics; Thermodynamics; ACTIVATED CARBON; CADMIUM CD2+; WASTE-WATER; ADSORPTION; CD(II); EQUILIBRIUM; IONS; ZINC; SINGLE;
D O I：
10.1016/j.matpr.2021.01.118
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A low-cost industrial biomass, pine-fruit residue (PFR) was utilized in preparing porous activated carbon by ZnCl2-impregnation followed by physically activation under inert atmosphere. The ZnCl2-activated carbon (ZnAC) was characterized for proximate analysis, surface properties, and used in removal of Cd2+ from synthetic waters. Experiments investigated the influence of pH, temperature and contact time in establishing the optimum Cd2+ sorption conditions. Temperature dependent equilibrium adsorption data were modelled using non-linear regression in the range 303-323 K. Equilibrium Cd2+ removal intake of 94.2 mg.g(-1) was achieved at 323 K and adsorption followed the Langmuir isotherm. Synthetic water pH, 7.0 and temperature, 323 K was observed optimum for saturated monolayer Cd2+ sorption capacity. Adsorption kinetics was more favourably described by Pseudo-second-order kinetic model. Thermodynamic parameter estimation indicated Cd2+ sorption process was spontaneous, endothermic and chemisorption phenomenon. The alterations in surface morphology of ZnAC were observed using filed-emission scanning electron microscopy (FE-SEM) integrated with elemental mapping from energy diffraction X-ray (EDX). (C) 2021 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4684 / 4688
页数：5
相关论文
共 30 条
[1]   Production and characterization of activated carbon from sour cherry stones by zinc chloride [J].
Angin, Dilek .
FUEL, 2014, 115 :804-811
[2]   2-Steps KOH activation of rice straw: An efficient method for preparing high-performance activated carbons [J].
Basta, A. H. ;
Fierro, V. ;
Ei-Saied, H. ;
Celzard, A. .
BIORESOURCE TECHNOLOGY, 2009, 100 (17) :3941-3947
[3]   Cadmium (Cd2+) removal by nano zerovalent iron: surface analysis, effects of solution chemistry and surface complexation modeling [J].
Boparai, Hardiljeet K. ;
Joseph, Meera ;
O'Carroll, Denis M. .
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2013, 20 (09) :6210-6221
[4]   Development and optimization of magnetic technologies based processes for removal of some toxic heavy metals [J].
Borai, E. H. ;
El-Sofany, E. A. ;
Morcos, T. N. .
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 2007, 13 (02) :95-104
[5]   Point of zero charge of different carbides [J].
Cerivic, Lj. S. ;
Milonjic, S. K. ;
Todorovic, M. B. ;
Trtanj, M. I. ;
Pogozhev, Y. S. ;
Blagoveschenskii, Y. ;
Levashov, E. A. .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2007, 297 (1-3) :1-6
[6]   Effect of modification of environmentally friendly biosorbent wheat (Triticum aestivum) on the biosorptive removal of cadmium(II) ions from aqueous solution [J].
Farooq, Umar ;
Khan, Misbahul Ain ;
Athar, Makshoof ;
Kozinski, Janusz A. .
CHEMICAL ENGINEERING JOURNAL, 2011, 171 (02) :400-410
[7]   Preparation and characterisation of activated carbon from waste tea using K2CO3 [J].
Gurten, I. Isil ;
Ozmak, Meryem ;
Yagmur, Emine ;
Aktas, Zeki .
BIOMASS & BIOENERGY, 2012, 37 :73-81
[8]   Kinetic model for lead(II) sorption on to peat [J].
Ho, YS ;
McKay, G .
ADSORPTION SCIENCE & TECHNOLOGY, 1998, 16 (04) :243-255
[9]  
Kalkan E, 2013, POL J ENVIRON STUD, V22, P417
[10]   High surface area microporous activated carbons prepared from Fox nut (Euryale ferox) shell by zinc chloride activation [J].
Kumar, Arvind ;
Jena, Hara Mohan .
APPLIED SURFACE SCIENCE, 2015, 356 :753-761
123