Malaysian Journal of Analytical Sciences Vol 19 No 3 (2013): 531 – 540

 

 

 

OPTIMIZATION OF ELECTROCHEMICAL PARAMETERS FOR LANDFILL LEACHATE TREATMENT USING CHARCOAL BASE METALLIC COMPOSITE ELECTRODE

 

(Pengoptimuman Parameter Elektrokimia untuk Rawatan Air Larut Lesap Menggunakan Elektrod komposit Logam Berasaskan Arang)

 

Majd Ahmed Jumaah and Mohamed Rozali Othman*

 

School of Chemical Sciences and Food Technology

Faculty of Sciences and Technology

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

 

*Corresponding author: rozali@ukm.edu.my

 

 

Received: 12 March 2015; Accepted: 18 May 2015

 

 

Abstract

Landfill leachate normally contains organic and inorganic pollutants in high concentrations. Electrochemical oxidation technique is an effective method to treat landfill leachate, have high efficiency in organic pollutants degradation and ammonia removal. In this study, a cost effective charcoal base metallic composite electrode to treat landfill leachate by electrochemical oxidation was fabricated. The effects of operational parameters such as supporting electrolyte, applied voltage and electrolysis time on the removal percentage of Color, COD, NH₃-N and total-P (PO₄^-3) were carried out. The results obtained show that the removal percentage of Color, COD, NH₃-N and total- P (PO₄^-3) are 70, 89, 73 and 80 % respectively. Under the optimum operating condition, sodium chloride concentration of 1.5 % (w/v), applied voltage of 10 V, operating time 180 min and C₆₀C^G₁₅Co₁₀-PVC₁₅ electrode as an anode were used.

 

Keywords: landfill leachate, charcoal, electrode, electrochemical

 

Abstrak

Air larut lesap dilaporkan mengandungi jumlah bahan pencemaran organik dan bukan organik dalan kuantiti yang tinggi. Kaedah pengoksidaan elektrokimia adalah merupakan satu kaedah yang berkesan dalam merawat air larut lesap kerana kecekapannya yang tinggi dalam pemecahan bahan pencemaran organik dan ammonia. Dalam kajian ini, elektrod logam komposit yang berasaskan arang yang tidak saja murah tetapi berkesan dalam merawat air larut lesap secara elektrokimia telah berjaya difabrikasikan. Kesan parameter pengoperasian seperti kepekatan elektrolit penyokong, keupayaan yang dikenakan dan masa elektrolisis dalam mengurangkan warna, COD, NH₃-N dan jumlah- P(PO₄^-3) telah dijalankan. Hasil kajian mendapati pada keadaan optimum, peratus penyingkiran warna, COD, NH₃-N dan jumlah-P(PO₄^-3) masingnya-masingnya ialah 70, 89, 73 dan 80 % telah dicapai. Keadaan optimum yang diguna ialah kepekatan NaCl 1.5 % (w/v) sebagai elektrolit penyokong, keupayaan yang dikenakan 10 V, masa operasi 180 min dan elektrod C₆₀C^G₁₅Co₁₀-PVC₁₅ digunakan sebagai elektrod kerja (anod)

 

Kata kunci: air larut lesap, arang, elektrod, elektrokimia

 

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