The Malaysian Journal Of Analytical Sciences Vol 13 No 1 (2009): 52 – 62

 

 

 

SORPtion of cu(II) by chemically grafted hydroxamic

acid-zeolite

 

(Erapan Cu(II) oleh Zeolit Terubahsuai Dengan Asid Hidroksamik)

 

Md Jelas Haron¹*, Nur Anisah Shafie¹, Nor Azah Yusof¹, Anuar Kassim¹, W.M.Z. Wan Yunus¹, S.M. Talebi²

 

¹Chemistry Department, Universuti Putra Malaysia, 43400 Serdang, Selangor, Malaysia

²Department of Chemistry, The University of Isfahan, Hezar Jarib, Isfahan, Iran

 

*Corresponding author: mdjelas@fsas.upm.edu.my

 

 

Abstract

Sorption of Cu(II) by zeolite sorbent chemically modified with hydroxamic acid (HASiZP) is described.  The maximum sorption capacity of Cu(II) occurred at pH 5.   Sorption capacity of Cu(II) by HASiZP was doubled compared to the original zeolite.  Kinetic study shows that Cu(II) sorption followed by second order kinetic model.  The sorption of Cu(II) followed Langmuir isotherm model with maximum capacity of 33.32 mg/g at 25°C and increased to 48.12 mg/g at 70°C.  Cu(II) sorption by the HASiZP was endothermic and spontaneous processes with positive values of  entropy changes.

 

Keywords:  Hydroxamic acid-grafted zeolite, Cu(II), sorption.

 

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