Apricot stone;
Cobalt;
Heavy metal removal;
Kinetic;
Isotherm;
Activated carbon;
AQUEOUS-SOLUTIONS;
HEAVY-METALS;
REMOVAL;
IONS;
MONTMORILLONITE;
BIOSORPTION;
WATER;
ACID;
DYE;
D O I:
10.1016/j.jiec.2013.06.030
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
The activated carbon from apricot stone with H3PO4 and its ability to remove Co2+ are reported. The FTIR spectroscopy brings insights on interactions between the functional groups of the carbon and Co2+. Adsorption studies are carried in batch mode by varying the initial Co2+ concentration and pH. A comparison of two kinetic models on the overall adsorption rate shows that the system is described by the pseudo-second-order kinetic model. The Freundlich model fits the data with a monolayer adsorption capacity of 111.11 mg/g at pH 9. The enthalpy and free energy indicate an endothermic and not spontaneous process. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机构:
Periyar EVR Coll Autonomous, PG & Res Dept Chem, Tiruchirappalli 620023, Tamil Nadu, IndiaPeriyar EVR Coll Autonomous, PG & Res Dept Chem, Tiruchirappalli 620023, Tamil Nadu, India
Venkatraman, B. R.
Parthasarathy, S.
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CARE Sch Engn, Dept Chem, Tiruchirappalli 620009, Tamil Nadu, IndiaPeriyar EVR Coll Autonomous, PG & Res Dept Chem, Tiruchirappalli 620023, Tamil Nadu, India
Parthasarathy, S.
Kasthuri, A.
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Nehru Mem Coll, Dept Chem, Tiruchirappalli 621007, Tamil Nadu, IndiaPeriyar EVR Coll Autonomous, PG & Res Dept Chem, Tiruchirappalli 620023, Tamil Nadu, India
Kasthuri, A.
Pandian, P.
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Periyar EVR Coll Autonomous, PG & Res Dept Chem, Tiruchirappalli 620023, Tamil Nadu, IndiaPeriyar EVR Coll Autonomous, PG & Res Dept Chem, Tiruchirappalli 620023, Tamil Nadu, India
Pandian, P.
Arivoli, S.
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HH Rajahs Coll, PG Dept Chem, Pudukkottai 622001, Tamil Nadu, IndiaPeriyar EVR Coll Autonomous, PG & Res Dept Chem, Tiruchirappalli 620023, Tamil Nadu, India