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Vol. 26 No. 12 (2014): Vol 26 Issue 12

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

https://doi.org/10.14233/ajchem.2014.16227
Sharifah Mohamad
Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
Nor Kartini Abu Bakar
Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
Ahmad Razali Ishak
Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia ;Department of Environmental Health, Faculty of Health Science, University of Teknologi Mara, Puncak Alam, 42300 Kuala Selangor, Malaysia
Hemavathy Surikumaran
Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
Kavirajaa Pandian
Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
Muggundha Raoov
Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Cluster Integrative Medicine, Advanced Medical & Dental Institute, Universiti Sains Malaysia, No 1-8 (Lot 8), Persiaran Seksyen 4/1, Bandar Putra Bertam, Kepala Batas, Pulau Pinang 13200, Malaysia
Nur Nadhirah Mohamad Zain
Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Cluster Integrative Medicine, Advanced Medical & Dental Institute, Universiti Sains Malaysia, No 1-8 (Lot 8), Persiaran Seksyen 4/1, Bandar Putra Bertam, Kepala Batas, Pulau Pinang 13200, Malaysia
Kumuthini Chandrasekaram
University of Malaya Centre for Ionic Liquids, Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia

Corresponding Author(s) : Sharifah Mohamad

sharifahm@um.edu.my

Asian Journal of Chemistry, Vol. 26 No. 12 (2014): Vol 26 Issue 12

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.

Keywords

Paper mill sludge Phosphate Removal Kinetics Adsorption
Mohamad, S., Kartini Abu Bakar, N., Razali Ishak, A., Surikumaran, H., Pandian, K., Raoov, M., … Chandrasekaram, K. (2014). Removal of Phosphate by Paper Mill Sludge: Adsorption Isotherm and Kinetic Study. Asian Journal of Chemistry, 26(12), 3545–3552. https://doi.org/10.14233/ajchem.2014.16227
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