TY  - JOUR
N2  - 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.
IS  - 2-3
KW  - Analysis of variances (ANOVA); Central composite design (CCD); Coagulation-flocculation; Leachate; Poly-aluminum chloride (PAC); Response surface methodology (RSM)
KW  -  Alumina; Aluminum; Analysis of variance (ANOVA); Charge coupled devices; Chemical oxygen demand; Chemicals removal (water treatment); Chlorine compounds; Coagulation; Color; Digital cameras; Flocculation; Land fill; Leachate treatment; Leaching; Light metals; Metal recovery; Oxygen; pH; Refuse disposal; Regression analysis; Removal; Sulfate minerals; Surface properties; Surface treatment; Turbidity; Waste disposal; Wastewater treatment; Water treatment
KW  -  Chemical water treatment
KW  -  aluminum compound; chemical oxygen demand; coagulation; color; experimental study; flocculation; landfill; leachate; optimization; pH; pollutant removal; polymer; sulfate; turbidity; variance analysis
KW  -  Alum Compounds; Aluminum Compounds; Chlorides; Color; Flocculation; Malaysia; Methods; Water Pollutants
KW  -  Chemical; Water Purification
ID  - scholars738
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-59849120328&doi=10.1016%2fj.jhazmat.2008.07.090&partnerID=40&md5=dc27810e3ad1acd01169cbefd7e6f039
A1  - Ghafari, S.
A1  - Aziz, H.A.
A1  - Isa, M.H.
A1  - Zinatizadeh, A.A.
JF  - Journal of Hazardous Materials
VL  - 163
Y1  - 2009///
N1  - cited By 515
SP  - 650
TI  - Application of response surface methodology (RSM) to optimize coagulation-flocculation treatment of leachate using poly-aluminum chloride (PAC) and alum
AV  - none
EP  - 656
SN  - 03043894
ER  -