Adsortion of lead onto Xanthated modified Rubber (Hevea Brasiliensis) 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 (2011) Adsortion of lead onto Xanthated modified Rubber (Hevea Brasiliensis) powder. In: ICCEIB -SOMChE 2011, 28 Nov. - 1 Dec., 2011, Universiti Malaysia Pahang.

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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 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) increased with increasing agitation rate but decreased with increasing adsorbent dosage and temperature. Thermodynamic parameters such as enthalpy change (ΔHº), free energy change (ΔGº) and entropy change (ΔSº) 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 > 0.95. Key words: Adsorption; Lead; Rubber leaf powder; Thermodynamic; Xanthation

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	5652/8033
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 Pharmacy > Department of Pharmaceutical Chemistry
Depositing User:	Dr. Siti Zaiton Mat So'ad
Date Deposited:	04 Aug 2013 07:25
Last Modified:	04 Aug 2013 07:27
URI:	http://irep.iium.edu.my/id/eprint/8033

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