Water removal of oxytetracycline using titanium dioxide/solar photodecomposition and biocarbon adsorption
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2018
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BIOCHAR
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Resumo
Oxytetracycline (OTC) is a broad-spectrum antibiotic with efficacy against infections,
high solubility in water and used both in veterinary and human medicine, primarily in
poultry and livestock, but also for human consumption. Nowadays Brazil is the higher
protein producer in the world, and the agribusiness is the strongest economy sector in
the country. The OTC use is increasing in veterinary medicine and also its detection in
surface water resources and sewage treatment effluents. The conventional water
treatment processes have to improve to enhance the pharmaceuticals removal efficiency.
The occurrence of OTC in the natural environment can affect the selection of genetic
variants of resistant microorganisms, inducing a risk to the ecosystem and human
health. The experiments started with the dilution of standard oxytetracycline solution.
They solutions were preheating before the addition of TiO2 and kept in a solar radiation
chamber during 120 minutes. The addition of micronized biocarbon (diameter < 500
mesh) in all collected suspension aliquots followed by shaking, and centrifugation at
1500 rpm for 15 minutes allows the supernatants OCT measurements at UV – Visible
Spectrophotometer Cary 13 at λ = 268 nm and 373 nm. The absorbance values were
converted to antibiotics concentration using an analytical curve prepared with standard
antibiotics solutions. After the processes optimization, the OCT removal percentage
reached 95%with pseudo-second-order kinetics and better isotherm agreement with
Langmuir R2= 0.689 and Redlich-Peterson with R2 = 0.738.
Como referenciar
GONÇALVES, G.M.; LIMA, G.N.S.; MACEDO, M.V.; ORTIZ, N. Water removal of oxytetracycline using titanium dioxide/solar photodecomposition and biocarbon adsorption. In: BIOCHAR, August 20-23, 2018, Wilmington, Delaware, USA. Abstract... Disponível em: http://repositorio.ipen.br/handle/123456789/29769. Acesso em: 19 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.