SciELO - Scientific Electronic Library Online

vol.36 issue5The defouling of membranes using polymer beads containing magnetic micro particlesFunctionalised natural zeolite and its potential for treating drinking water containing excess amount of nitrate author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand



Related links

  • On index processCited by Google
  • On index processSimilars in Google


Water SA

On-line version ISSN 1816-7950
Print version ISSN 0378-4738


GUO, W; WANG, H; SHI, Y  and  ZHANG, G. Sonochemical degradation of the antibiotic cephalexin in aqueous solution. Water SA [online]. 2010, vol.36, n.5, pp.651-654. ISSN 1816-7950.

The degradation of cephalexin in aqueous solution under ultrasound irradiation was investigated. Biodegradability of the solution was evaluated by the BOD5/COD ratio, which was raised from zero to 0.36 after ultrasound treatment, indicating that the ultrasound irradiation process is a successful pre-treatment step to improve the biodegradability of cephalexin solution. The influences of ultrasound power and pH value on the degradation of cephalexin were studied. It was found that the optimal ultrasound power for cephalexin degradation in the system was 200 W and the rate of cephalexin degradation was maximal in the pH range of 6.5 to 8.5. The degradation kinetics of cephalexin in aqueous solution under various operational conditions was also investigated. It was found that the degradation of cephalexin follows a pseudo-first order kinetics.

Keywords : antibiotic; biodegradability; cephalexin; degradation; ultrasound.

        · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License