Announcement
Starting on July 4, 2018 the Indonesian Publication Index (IPI) has been acquired by the Ministry of Research Technology and Higher Education (RISTEKDIKTI) called GARUDA Garba Rujukan Digital (http://garuda.ristekdikti.go.id)
For further information email to portalgaruda@gmail.com

Thank you
Logo IPI  
Journal > Indonesian Journal of Chemistry > THERMAL EFFECT OF COCONUT CREAMS ABILITY TO ADSORB CALCIUM(II)

 

Full Text PDF (43 kb)
Indonesian Journal of Chemistry
Vol 2, No 2 (2002)
THERMAL EFFECT OF COCONUT CREAMS ABILITY TO ADSORB CALCIUM(II)
Tahir, Fatmawati ( Chemistry Department, Faculty of Mathematics and Natural Sciences Gadjah Mada University, Yogyakarta)
Setyopratiwi, Ani ( Chemistry Department, Faculty of Mathematics and Natural Sciences Gadjah Mada University, Yogyakarta)
Sudiono, Sri ( Chemistry Department, Faculty of Mathematics and Natural Sciences Gadjah Mada University, Yogyakarta)
Article Info   ABSTRACT
Published date:
08 Jun 2010
 
Study of thermal effect of coconut creams ability to adsorb Ca (II) has been done at various temperatures of 49 oC,  59 oC and 80 oC. The adsorption study was performed to check capacity, energy and rate of adsorption by varying the number of initial concentration of CaCl2 bounded on coconut protein. This research was also done to determine number of Ca (II) in the coconut protein using the salt addition and elicits reaction methods. The result showed that adsorption ability tends to increased with the increase of temperature). Coconut cream heated at 59 oC adsorb Ca(II) with the highest adsorption capacity of 3.98 mg/g and K = 3.48x104  mol-1. The salt addition method on the coconut cream gives more Ca (II) than elicit reaction method. The first method gives 0.01137 mol/L and the second was 0.02845 mol/L. Based on the energy of adsorption, cream without heating had 20.59 kJ/mol as a physical adsorption and heating effect at temperatures 49 oC, 59 oC and 80 oC had 24.95; 28.87 and 24.87 kJ/mol respectively as a chemical adsoprtion with the rate of adsorptions of 0,0054;  0,0510 dan  0,3. 10-4 minute-1, respectively.   Keywords: coconut cream, adsorption, thermal effect.
Copyrights © 2010