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Influence of Electrokinetic Processing of Tropical Soils on the pHs of the Electrolytes

Kamarudin Ahmad, and Khairul Anuar Kassim, and Mohd Raihan Taha, (2005) Influence of Electrokinetic Processing of Tropical Soils on the pHs of the Electrolytes. Malaysian Journal of Civil Engineering, 17 (1). pp. 39-48.

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Official URL: http://web.utm.my/ipasa/images/stories/MJCE/2005/vol_17_no_1/Influence%20of%20Electrokinetic%20Processing%20of%20Tropical%20Soils%20on%20the%20pHs%20of%20the%20Electrolytes.pdf

Affiliations

Universiti Teknologi Malaysia, Faculty of Civil Engineering.
Universiti Teknologi Malaysia, Faculty of Civil Engineering.
Universiti Kebangsaan Malaysia, Faculty of Engineering, Dept. of Civil and Structural Engineering.

Abstract

The pH values of different anolytes and catholytes during electrokinetic (EK) processing of a tropical residual soil were investigated in laboratory. Four opened-anode and opened-cathode systems with different types of catholytes and anolytes were examined. Aluminium chloride, calcium chloride and phosphoric acid were used as electrolytes besides distilled water. Compressed soil samples, up to 90% of the maximum dry density at the optimum moisture content were subjected to a DC electrical potential of 30 V for 168 hrs. The pH values of the anolytes and catholytes were monitored continuously. The investigation showed that the pH values varied with time depending upon their initial values, the types of anolytes and catholytes and the systems employed. The measured pH values of the electrolytes were different from the theoretical values because of low efficiency of the EK experimental set up and complex electrochemical processes.

Kajian ke atas nilai-nilai pH anolit dan katolit semasa pemprosesan elektrokinetik ke atas satu tanah baki tropika dilakukan di makmal. Empat sistem anodterbuka dan katod-terbuka diaplikasikan dalam kajian ini dengan menggunakan katolit dan anolit yang berlainan jenis. Di samping air suling, bahan-bahan kimia lain yang digunakan sebagai elektrolit adalah aluminium klorida, kalsium klorida dan asid fosforik. Sampel-sampel tanah yang telah dimampatkan ke tahap 90% ketumpatan kering maksima pada kandungan lembapan optima dikenakan arus terus 30 V selama 168 jam. Nilai-nilai pH elektrolit dipantau sepanjang ujikaji. Kajian menunjukkan nilai-nilai pH berubah mengikut masa bergantung kepada nilai-nilai asal, jenis anolit dan katolit serta jenis sistem yang digunakan. Nilai-nilai pH yang diukur berbeza dari nilai-nilai teori disebabkan oleh faktor kecekapan peralatan ujikaji EK dan tidakbalas elektrokimia yang kompleks.

Item Type:Journal
Keywords:Electrokinetics, Residual Soil, Anolyte, Catholyte, Electrochemical Elektrokinetik, Tanah Baki, Anolit, Katolit, Elektrokimia
Subjects:T Technology, Engineering
ID Code:6506

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