Synthetic polyelectrolytes of varying charge densities but similar molar mass based on acrylamide and their applications on palm oil mill effluent treatment |
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Authors: | A. Ariffin A.R. Nik Norulaini |
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Affiliation: | a School of Material and Mineral Resources Engineering, University of Science Malaysia, 14300 Nibong Tebal, Penang, Malaysia Tel. +60 (4) 6532175; Fax +60 (4) 6574739 b School of Distance Education, University of Science Malaysia, 11800 Minden, Malaysia c School of Industrial Technology, University of Science Malaysia, 11800 Minden, Penang, Malaysia |
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Abstract: | Cationic polyacrylamides of varying charge densities but similar molar mass were synthesized using free radical polymerization and Mannich reaction, characterized by different methods and applied as flocculants for palm oil mill effluents (POME). Flocculant performance was assessed by determining the polymer dosage, pH of POME and the removal efficiency of the resulting supernatants using turbidity, suspended solids and chemical oxygen demand as indicators. The pH of POME was adjusted to 3 prior to flocculation. It was found that varying the charge density of the polymer from 48.2-485 C/g affects flocculant performance significantly. Polymer adsorption increased as the charge density of the polymers increased. High charge density cationic polyacrylamide (485 C/g) is the most effective polymer as it obtains 98% turbidity removal, 98.7% suspended solids removal and 54% chemical oxygen demand removal with a dosage as low as 32 mg/l at pH 3 of POME. |
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Keywords: | Cationic polyacrylamide Charge density Flocculation Palm oil mill effluent (POME) Jar test |
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