| Environmental & Energy Engineering |
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| Investigating the potential of using acoustic frequency on the degradation of linear alkylbenzen sulfonates from aqueous solution |
| DEHGHANI Mohammad Hadi, MAHVI Amir Hossein, NAJAFPOOR Ali Asghar, AZAM Kamal |
| Department of Environmental Health Engineering, School of Public Health, Center for Environmental Research, Medical Sciences/University of Tehran, Tehran, I.R. Iran; Department of Environmental Health, School of Public Health, Mashhad University of Medical Sciences, Mashhad, I.R. Iran; Department of Epidemiology and Biostatistics, School of Public Health, Medical Sciences/University of Tehran, Tehran, I.R. Iran |
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Abstract The effectiveness of using acoustical (sonochemical) reactor for degradation of linear alkylbenzen sulfonate (LAS) from aqueous solution was investigated. LASs are anionic surfactants, found in relatively high amounts in domestic and industrial wastewaters. In this study, experiments on LAS solution were performed using methylene blue active substances (MBAS) method. The effectiveness of acoustical processor reactor for LAS degradation is evaluated with emphasis on the effect of treatment time and initial LAS concentration. Experiments were performed at initial concentrations of 0.2, 0.5, 0.8 and 1.0 mg/L, acoustic frequency of 130 kHz, applied power of 500 W and temperature of 18 °C~20 °C. At the conditions involved, LAS degradation was found to increase with increasing sonochemical time. In addition, as the concentration increased, the LAS degradation rate decreased in the acoustical processor reactor.
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Received: 25 January 2007
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