Abu Hassan , Mohd. Ariffin and Mantzavinos, Dionissios and Metcalfe, Ian S. (2007) Ultrasonic irradiaton of the removal of linear alkylbenzena sulphonates (LAS) from wastewater. Jurnal Teknologi F (46F). pp. 27-40. ISSN 0127-9696
Official URL: http://www.penerbit.utm.my/cgi-bin/jurnal/jurnal.c...
The effect of low frequency (20 kHz) ultrasonic irradiation on the removal of sodium Linear Alkylbenzene Sulphonates (LAS) from aqueous solutions has been investigated. Sonication of three different initial concentrations of LAS, 500 Î¼gmol/l, 750 Î¼gmol/l and 1000 Î¼gmol/l, were performed. All experiments used a temperature of 30Â°C, frequency of 20 kHz, power of 125 W, a batch time of 120 min and the pH was left uncontrolled. It was found that the main degradation of LAS at micromolar concentrations proceeded via a reaction with OHÂ· radicals. The initial degradation rate increased with an increase in the surfactant concentration over the whole concentration range studied. The sonolysis of LAS showed a strong inhibition of H2O2 production at a higher concentration. Sonication of LAS in the presence of BrÂ¯ suggested that OHÂ· radicals induced degradation pathway was the dominating sonochemical degradation mechanism.
|Uncontrolled Keywords:||surfactants, ultrasonic, wastewater, total organic carbon (TOC)|
|Subjects:||T Technology > TP Chemical technology|
|Divisions:||Chemical and Natural Resources Engineering (Formerly known)|
|Deposited By:||Norshiela Buyamin|
|Deposited On:||27 Mar 2009 03:33|
|Last Modified:||28 Sep 2010 02:24|
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