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INVESTIGATION OF ISOTHERMAL AND FIXED-BED COLUMN SORPTION OF Cu (II) ONTO ALMOND SHELL
Autori: Soheil Aber
Data aparitiei: March 2013
Revista: Environmental Engineering and Management JournalVol. 12Nr. 3
ISSN: 1843 - 3707
Pret: 25.00 RON    
N.A.
Abstract
The present study reports the efficiency of almond shell as a cheap and available material for the removal of Cu (II) from
contaminated aqueous solutions. The equilibrium experiments indicated that Cu (II) sorption obeyed the Langmuir isotherm at
26, 40 and 55oC. The highest value of the maximum uptake (Qo) from the Langmuir equation was found 6.783 mg g-1 at 40oC.
The various thermodynamic parameters such as ΔGo, ΔHo and ΔSo were also calculated. The values of ΔGo varied from -20.24 to
-23.70 kJ mol-1 in the temperature range of 26-55oC. The values of ΔHo and ΔSo were 15.44 kJ mol-1 and 118.76 J mol-1 K-1,
respectively. In the fixed bed column experiments, the breakpoint time was increased from approximately 20 to 150 min with
increasing the bed height from 7.5 to 15 cm. Also, the results showed that the Bohart-Adams model was suitable for description
of initial part of dynamic behavior diagram of the almond shell column. The sorption capacity of the column, qo, was found 0.456
and 0.653 mg g-1 for column heights of 7.5 and 15 cm, respectively.




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