Batch, column and thermodynamic of Pb(II) adsorption on xanthated rubber (Hevea brasiliensis) leaf powder

Wan Mohd Khalir, Wan Khaima Azira and Megat Hanafiah, Megat Ahmad Kamal and Mat So'ad, Siti Zaiton and Wan Ngah, Wan Saime and Abdul Majid, Zafri Azran (2012) Batch, column and thermodynamic of Pb(II) adsorption on xanthated rubber (Hevea brasiliensis) leaf powder. Journal of Applied Sciences, 12 (11). pp. 1142-1147. ISSN 1812-5662 (O), 1812-5654 (P)

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Abstract

Rubber (Hevea brasiliensis) leaf powder was modified by xanthation process and its potential in removing toxic Pb(II) ion from aqueous solutions was investigated in batch and column experiments. Pb(II) adsorption efficiency was found to be affected by several physicochemical parameters such as adsorbent dosage, shaking rate and temperature. The optimum adsorbent dosage was found to be at 0.02 g with more than 80% Pb(II) removal. The amount of Pb(II) adsorbed (mg g-1) increased with increasing shaking rate but decreased with increasing adsorbent dosage and temperature. Thermodynamic parameters such as enthalpy change (ΔH°), free energy change (ΔG°) and entropy change (ΔS°) were computed and Pb(II) adsorption process was found to be exothermic. Fixed-bed column fitted well the Thomas and Yoon-Nelson models with correlation coefficients of R2>0.96.

Item Type:	Article (Journal)
Additional Information:	5652/24504
Uncontrolled Keywords:	adsorption, lead, rubber leaf powder, thermodynamic, xanthation
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Allied Health Sciences Kulliyyah of Pharmacy > Department of Pharmaceutical Chemistry
Depositing User:	Dr. Siti Zaiton Mat So'ad
Date Deposited:	13 Aug 2012 09:37
Last Modified:	26 Nov 2014 13:28
URI:	http://irep.iium.edu.my/id/eprint/24504

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