Removal of Phosphate by Paper Mill Sludge: Adsorption Isotherm and Kinetic Study

Mohamad, Sharifah and Abu Bakar, Nor Kartini and Ishak, Ahmad Razali and Surikumaran, Hemavathy and Pandian, Kavirajaa and Ramachandran, Muggundha Raoov and Mohamad Zain, Nur Nadhirah and Chandrasekaram, Kumuthini (2014) Removal of Phosphate by Paper Mill Sludge: Adsorption Isotherm and Kinetic Study. Asian Journal of Chemistry, 26 (12). pp. 3545-3552. ISSN 0970-7077

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Abstract

Phosphate ions have been removed from aqueous solution by paper mill sludge. The influences of experimental conditions such as pH, amount of adsorbent, initial concentration of phosphate, adsorption isotherm and adsorption kinetics of paper mill sludge were studied. The adsorption of phosphate was more efficient in the basic pH region (pH 12). Pseudo second-order model fits better than the pseudo first-order model for adsorption kinetic data and indicates the adsorption process is based on chemisorptions. The calculated activation energy (Ea) is 37.01 J/mol which further suggests that the sorption of phosphate by paper mill sludge was based on chemical adsorption. Consequently, the equilibrium isotherm data were fitted well to Langmuir isotherm with maximum adsorption capacity of 12.65 mg/g. From the study, it showed that paper mill sludge has the potential to be utilized as a cost effective and high capability adsorbent for removal of phosphate from aqueous solutions.

Item Type: Article
Subjects: Q Science > QD Chemistry > QD1-999 Chemistry
Divisions: Institut Perubatan & Pergigian Termaju (Advanced Medical & Dental Institute) > Article
Zoom Profil Pakar (Expert Profile) > Dr. Muggundha Raoov A/L Ramachandran (Advanced Medical & Dental Institute)
Zoom Profil Pakar (Expert Profile) > Dr. Nur Nadhirah Mohamad Zain (Advanced Medical & Dental Institute)
Depositing User: Administrator Automasi
Date Deposited: 20 Nov 2017 05:18
Last Modified: 06 Dec 2017 02:42
URI: http://eprints.usm.my/id/eprint/37535

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