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Biodegradation of phenol by Synechocystis sp. in media including triacontanol hormone
Authors:Nur Koçberber Kιlιç  Pιnar Karacakaya  Ergin Duygu  Gönül Dönmez
Affiliation:Department of Biology, Faculty of Science, University of Ankara, Be?evler, Ankara, Turkey
Abstract:Phenol removal levels of Synechocystis sp. were investigated in BG11 media with 10 mg/L triacontanol (TRIA) and without it to test whether the hormone could increase the removal efficiency by increasing biomass. The assays were performed to determine the effect of light on degradation, in media with 119.0–492.8 mg/L phenol under light and dark conditions. At increasing phenol concentrations, the degradation ranged between 98.5 and 100% regardless of a dark or a light condition. Experiments were carried out under light to determine the optimum pH for effective degradation. Optimum pH was found to be 6.5 at 200 mg/L phenol with or without TRIA. Phenol degradation was investigated in the 120.2–826.9 mg/L range. Although 377.4 mg/L phenol was completely degraded in hormone controls within 120 h, degradation was increased by TRIA, and the process was completed in 96 h. These data suggest that Synechocystis sp. has potential for use in the treatment of wastewaters containing phenol.
Keywords:biodegradation  phenol               Synechocystis sp    triacontanol
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