Yeast-TiO₂Biotemplate for Oxytetracycline Solar Photodecomposition  

作　　者：Nilce Ortiz Lucia Nascimento Fernanda Maichin Izabela Rodrigues Cerqueira Lima Azevedo Marília Guerino Vieira Nilce Ortiz;Lucia Nascimento;Fernanda Maichin;Izabela Rodrigues Cerqueira Lima Azevedo;Marília Guerino Vieira(Institute for Nuclear and Energy Research—IPEN, São Paulo, Brasil)

机构地区：[1]Institute for Nuclear and Energy Research—IPEN, Sã o Paulo, Brasil

出　　处：《Journal of Materials Science and Chemical Engineering》2020年第7期12-26,共15页材料科学与化学工程（英文）

摘　　要：The detection of the pharmaceutical compounds used in human and veterinary medicine is in several environmental matrices (surface waters, effluents, groundwater, soils, and sediments), and such presence promotes the resistance bacteria development, making them ineffective in some diseases treatment. The research project promotes the TiO₂ synthesis using yeast culture as biotemplate, the step followed by the microstructure characterization with surface area enhancement;such properties are responsible for the improvement of solar photodecomposition processes of the veterinary antibiotic oxytetracycline. In such simple and standard process conditions the system reaches about 84% of removal percentage with a better agreement with the pseudo-first-order with the Pearson coefficient in the range from 0.82 to 0.94 and <em>K</em>₁ = 0.035 M^{<span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>1}<span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8729;</span></span>s<span style="white-space:nowrap;"><span style="font-size:10px;">^{&#8722;<span style="white-space:normal;">1</span>}</span></span>. The degradation rate constant increased with the increasing initial Yeast-TiO₂ dosage until the maximum mass of 0.1 g or with the decreasing of initial oxytetracycline concentration. The solar light used as a sustainable irradiation source is abundant and low cost in tropical countries, perfect to be applied in water treatment to decompose the pharmaceuticals pollutants, as the veterinarian antibiotics. The study demonstrates that solar photodecomposition is an efficient treatment technology for the removal of antibiotics from polluted water and provides insightful information on the potential practical application of this technology to treat contaminated water, possibly also in rural, distant areas.The detection of the pharmaceutical compounds used in human and veterinary medicine is in several environmental matrices (surface waters, effluents, groundwater, soils, and sediments), and such presence promotes the resistance bacteria development, making them ineffective in some diseases treatment. The research project promotes the TiO₂ synthesis using yeast culture as biotemplate, the step followed by the microstructure characterization with surface area enhancement;such properties are responsible for the improvement of solar photodecomposition processes of the veterinary antibiotic oxytetracycline. In such simple and standard process conditions the system reaches about 84% of removal percentage with a better agreement with the pseudo-first-order with the Pearson coefficient in the range from 0.82 to 0.94 and <em>K</em>₁ = 0.035 M^{<span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>1}<span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8729;</span></span>s<span style="white-space:nowrap;"><span style="font-size:10px;">^{&#8722;<span style="white-space:normal;">1</span>}</span></span>. The degradation rate constant increased with the increasing initial Yeast-TiO₂ dosage until the maximum mass of 0.1 g or with the decreasing of initial oxytetracycline concentration. The solar light used as a sustainable irradiation source is abundant and low cost in tropical countries, perfect to be applied in water treatment to decompose the pharmaceuticals pollutants, as the veterinarian antibiotics. The study demonstrates that solar photodecomposition is an efficient treatment technology for the removal of antibiotics from polluted water and provides insightful information on the potential practical application of this technology to treat contaminated water, possibly also in rural, distant areas.

关 键 词：OXYTETRACYCLINE PHOTODECOMPOSITION Bio Template YEAST SOLAR 

分 类 号：O17[理学—数学]