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Effects of ultrasonic irradiation on concentration of chemical oxygen demand in Landfill Leachate.

Abdul Latif, Puziah and Chua, Sze Yee and Ibrahim, Shaharin and Rosli, Nurliza (2011) Effects of ultrasonic irradiation on concentration of chemical oxygen demand in Landfill Leachate. The IUP Journal of Environmental Sciences, 5 (2 ). pp. 28-36. ISSN 0973-9912

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Abstract

Landfilling for the disposal of municipal solid wastes continues to be widely accepted and used due to its economic advantages, but it could be a potential source of surface and ground water contamination. Therefore, the study was conducted to investigate the efficiency of ultrasonic irradiation for reducing the Chemical Oxygen Demand (COD) from one of the landfill sites in Malaysia. Several operating conditions, such as power density (24 to 188 W/L), pH (2 to 11), dilution factor (1:9, 1:1 and 9:1) and addition of different amount of Ferrous sulfate (FeSO4) (1.0 to 5.0 mmol/L) were tested concerning their effect on COD reduction. Results indicated that the best irradiation conditions were enhanced at increased power density of 188 W/L, pH 7.4, initial concentration and without addition of catalysts with a percentage reduction of 95.55%. This suggested that the removal of COD in landfill leachate was mainly contributed by higher concentration of hydroxyl radical which leads to higher reduction of organic matters.

Item Type:Article
Keyword:Landfill leachate; Ultrasonic irradiation; Chemical oxygen demand; Hydroxyl radical.
Faculty or Institute:Faculty of Environmental Studies
Publisher:IUP Publications
ID Code:23572
Deposited By: Nur Farahin Ramli
Deposited On:12 Dec 2013 13:05
Last Modified:01 Oct 2015 10:03

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