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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
environmental science
Application of response surface methodology (RSM) to optimize coagulation-flocculation treatment of leachate using poly-aluminum chloride (PAC) and alum
Journal of Hazardous Materials, Volume 163, No. 2-3, Year 2009
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Description
Coagulation-flocculation is a relatively simple physical-chemical technique in treatment of old and stabilized leachate which has been practiced using a variety of conventional coagulants. Polymeric forms of metal coagulants which are increasingly applied in water treatment are not well documented in leachate treatment. In this research, capability of poly-aluminum chloride (PAC) in the treatment of stabilized leachate from Pulau Burung Landfill Site (PBLS), Penang, Malaysia was studied. The removal efficiencies for chemical oxygen demand (COD), turbidity, color and total suspended solid (TSS) obtained using PAC were compared with those obtained using alum as a conventional coagulant. Central composite design (CCD) and response surface method (RSM) were applied to optimize the operating variables viz. coagulant dosage and pH. Quadratic models developed for the four responses (COD, turbidity, color and TSS) studied indicated the optimum conditions to be PAC dosage of 2 g/L at pH 7.5 and alum dosage of 9.5 g/L at pH 7. The experimental data and model predictions agreed well. COD, turbidity, color and TSS removal efficiencies of 43.1, 94.0, 90.7, and 92.2% for PAC, and 62.8, 88.4, 86.4, and 90.1% for alum were demonstrated. © 2008 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Abdul Aziz, Hamidi Abdul
Malaysia, Minden
Universiti Sains Malaysia
Isa, Mohamed Hasnain
Malaysia, Seri Iskandar
Universiti Teknologi Petronas
Zinatizadeh, Ali Akbar
Iran, Kermanshah
Razi University
Statistics
Citations: 526
Authors: 3
Affiliations: 4
Identifiers
Doi:
10.1016/j.jhazmat.2008.07.090
ISSN:
03043894
Research Areas
Environmental