Avaliação da adsorção de contaminantes emergentes pela casca de banana e folhas da Typha Angustifolia L.
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Data
2015-04-10
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Universidade Federal de Goiás
Resumo
This paper describes the use of analytical methodology for removal of emerging contaminants
sulfamethoxazole (SMX), 17α-ethinylestradiol (EE2) and estrone (E1) in water samples. Was used
to remove the natural adsorbents Banana and Typha angustifolia L.in raw and treated in acidic
medium. The detection and quantification was performed by high performance liquid
chromatography (English, HPLC). There was a characterization of bioadsorventes by Infrared
Spectroscopy East and X-ray diffraction The point of zero charge of in natura banana peels and
treated with HCl was approximately 5.6 and 4.3, respectively, while point of zero charge of Typha
angustifolia in natura leaves and treated with HCl was approximately 5.5 and 4.5, respectively. It
was determined that the pH only influences the adsorption exerted SMX, and the pH 2 and 8 were
most suitable. However, we chose to work with natural pH of the mixtures of the compounds (pH
= 5.25). This study used multivariate methods (full 23 factorial design and response surface) to
verify the best chemical variables. The optimized and used for construction of isotherms
conditions were: cattail in kind (m = 0.38 g; t = 65 min), cattail HCl (m = 0.75 g; t = 64 min), fresh
banana (m = 0, 55g, t = 62 min) and banana HCl (m = 0.76g; t = 66 min). There was the
determination of LD figures of merit (SMX = 0.02 mg L-1, EE2 = 0.03 mg L-1, E1 = 0.03 mg L-1)
QL (SMX = 0.05 mg L-1, EE2 = 0.05 mg L-1, E1 = 0.05 mg L-1), the selectivity was determined
by building fortified calibration curves with water samples. The linearity was determined by the
correlation coefficient (r = 0.99), recovery values were between 59.9% and 93.6% for the
compounds and accuracy of results presented at most 14.7%. The proposed methodology has been
applied to real matrix with removal percentages close to 100%.
Descrição
Palavras-chave
Adsorção, Contaminantes emergentes, Matriz ambiental, Adsorption, Emerging contaminants, Environmental matrix
Citação
SOUSA, P. A. R. Avaliação da adsorção de contaminantes emergentes pela casca de banana e folhas da Typha Angustifolia L.. 2015. 97 f. Dissertação (Mestrado em Química) - Universidade Federal de Goiás, Catalão, 2015.