Kinetics of low frequency sonodegradation of linear alkylbenzene sulfonate solutions
The decomposition of sodium dodecylbenzene sulfonate (SDBS) in water by means of ultrasound irradiation at 20 kHz was investigated. Experiments were conducted at surfactant concentrations of 175, 260 and 350 mg l-1, liquid volumes of 120, 170 and 220 ml, temperatures of 20, 30 and 45°C and applied...
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my.utm.90532018-03-22T08:34:38Z http://eprints.utm.my/id/eprint/9053/ Kinetics of low frequency sonodegradation of linear alkylbenzene sulfonate solutions Abu Hassan, Mohd. Ariffin Kim, Jung K. Metcalfe, Ian S. Mantzavinos, Dionissios TP Chemical technology The decomposition of sodium dodecylbenzene sulfonate (SDBS) in water by means of ultrasound irradiation at 20 kHz was investigated. Experiments were conducted at surfactant concentrations of 175, 260 and 350 mg l-1, liquid volumes of 120, 170 and 220 ml, temperatures of 20, 30 and 45°C and applied power of 40, 80 and 125 W. The extent of degradation was followed monitoring substrate and organic carbon concentrations, while hydrogen peroxide concentration was also measured; the latter is a product of water sonolysis due to hydroxyl radical recombination. 80% SDBS conversion was achieved after 120 min of sonication at 125 W and 30°C; nonetheless, SDBS and its degradation intermediates proved difficult to oxidise as only about 20-25% of the initial carbon content was transformed to carbon dioxide. At the initial stages of the reaction, degradation rate appears to be only weakly dependent on the substrate concentration with the rate increasing from 3.1 to 4 mg l-1 min -1 with increasing concentration from 175 to 350 mg l-1. Degradation appears to occur at the bubble-liquid interface through hydroxyl radical-mediated reactions whose role was established by performing experiments in the presence of radical scavengers, namely potassium bromide and sodium benzoate. Degradation rates increased with increasing power and decreasing temperature and volume. Elsevier BV 2006 Article PeerReviewed Abu Hassan, Mohd. Ariffin and Kim, Jung K. and Metcalfe, Ian S. and Mantzavinos, Dionissios (2006) Kinetics of low frequency sonodegradation of linear alkylbenzene sulfonate solutions. Chemosphere, 62 (5). pp. 749-755. ISSN 0045-6535 http://dx.doi.org/10.1016/j.chemosphere.2005.04.075 10.1016/j.chemosphere.2005.04.075 |
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TP Chemical technology Abu Hassan, Mohd. Ariffin Kim, Jung K. Metcalfe, Ian S. Mantzavinos, Dionissios Kinetics of low frequency sonodegradation of linear alkylbenzene sulfonate solutions |
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The decomposition of sodium dodecylbenzene sulfonate (SDBS) in water by means of ultrasound irradiation at 20 kHz was investigated. Experiments were conducted at surfactant concentrations of 175, 260 and 350 mg l-1, liquid volumes of 120, 170 and 220 ml, temperatures of 20, 30 and 45°C and applied power of 40, 80 and 125 W. The extent of degradation was followed monitoring substrate and organic carbon concentrations, while hydrogen peroxide concentration was also measured; the latter is a product of water sonolysis due to hydroxyl radical recombination. 80% SDBS conversion was achieved after 120 min of sonication at 125 W and 30°C; nonetheless, SDBS and its degradation intermediates proved difficult to oxidise as only about 20-25% of the initial carbon content was transformed to carbon dioxide. At the initial stages of the reaction, degradation rate appears to be only weakly dependent on the substrate concentration with the rate increasing from 3.1 to 4 mg l-1 min -1 with increasing concentration from 175 to 350 mg l-1. Degradation appears to occur at the bubble-liquid interface through hydroxyl radical-mediated reactions whose role was established by performing experiments in the presence of radical scavengers, namely potassium bromide and sodium benzoate. Degradation rates increased with increasing power and decreasing temperature and volume. |
| format |
Article |
| author |
Abu Hassan, Mohd. Ariffin Kim, Jung K. Metcalfe, Ian S. Mantzavinos, Dionissios |
| author_facet |
Abu Hassan, Mohd. Ariffin Kim, Jung K. Metcalfe, Ian S. Mantzavinos, Dionissios |
| author_sort |
Abu Hassan, Mohd. Ariffin |
| title |
Kinetics of low frequency sonodegradation of linear alkylbenzene sulfonate solutions |
| title_short |
Kinetics of low frequency sonodegradation of linear alkylbenzene sulfonate solutions |
| title_full |
Kinetics of low frequency sonodegradation of linear alkylbenzene sulfonate solutions |
| title_fullStr |
Kinetics of low frequency sonodegradation of linear alkylbenzene sulfonate solutions |
| title_full_unstemmed |
Kinetics of low frequency sonodegradation of linear alkylbenzene sulfonate solutions |
| title_sort |
kinetics of low frequency sonodegradation of linear alkylbenzene sulfonate solutions |
| publisher |
Elsevier BV |
| publishDate |
2006 |
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http://eprints.utm.my/id/eprint/9053/ http://dx.doi.org/10.1016/j.chemosphere.2005.04.075 |
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1643645106769625088 |
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13.211869 |