Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico / Tephrosia toxicaria Pers. (sin. Tephrosia sinapou (Bucâhoz) A. Chev), Fabaceae, Ã uma planta tropical ictiotÃxica, popularmente conhecida como âtimbÃâ e utilizada como defensivo
agrÃcola natural. Stemodia maritima Linn. (Scrophulariaceae) à conhecida no Nordeste brasileiro como âmelosaâ e tambÃm encontrada nas ilhas do Caribe onde à usada para tratar vÃrios tipos de doenÃas. O estudo quÃmico das raÃzes de T. toxicaria permitiu o isolamento da
flavanona obovatina que sofreu reaÃÃo de hidrogenaÃÃo para gerar um derivado hidrogenado TTR-1H. O estudo quÃmico das folhas de S. maritima forneceu dois diterpenos do tipo
estemodanos, sendo eles a estemodina e estemodinol, alÃm da flavona jaceidina. O extrato etanÃlico das folhas de S. maritima apresentou atividade antioxidante comparÃvel à da
vitamina C. A obovatina reduziu o infiltrado inflamatÃrio e a hiperalgesia facial em
articulaÃÃo temporomandibular de ratos nas concentraÃÃes de 1 e 10 mg/Kg, exercendo
atividades anti-inflamatÃria e analgÃsica em um modelo experimental de artrite induzida por zymosan. A estemodina, o extrato SMFE e obovatina foram submetidos a ensaios de atividade antibacteriana e demonstraram aÃÃo moderada frente a cepas de Staphylococcus aureus (12692), Staphylococcus aureus (358), Bacillus cereus (33018), Pseudomonas aeruginosa (15442) e Escherichia coli (27). As substÃncias isoladas foram identificadas por mÃtodos
espectromÃtricos e espectroscÃpicos (IV, EM, RMN 1H e RMN 13C), incluindo RMN
bidimensional (HMBC, HSQC, NOESY e COSY) e por comparaÃÃo com dados da literatura. / Inorganic matrices have been used as adsorbent mate
rial for removal of chemical pollutants in aquatic systems, due to its good adsorption capacity for
physical and chemical stabilities and this work was
synthesized silica spheres functionalized with EDTA in order to remove metal ions in aqueous solution. The kinetics of adsorption of the ions under study (Cu2 +
, Cd2 + and Zn2 +) was performed at pH 5.5 at a concentration of 60 mg L-1, where it was observed that equilibrium is reached very fast, about 10 minutes, indicating that limiting step of the adsorption
process may be the chemisorption, as evidenced by t
he best fitting model for the pseudo-second order. The adsorption isotherms were subjected to linear and
nonlinear model for comparison, using the error function SSE and R2 as a reference. The study of simple and multielement ions was carried out at pH 5.5, concentrations
ranging from 10-300 mg L-1, where the data were submitted to the models of Langmuir, Freundlich, Temkin and Redlich-Peterson. The results showed a better fit
to the Langmuir model, which argues that the adsorption sites are homogeneous and monolayer adsorption. The maximum sorption capacities observed in studies of
equilibrium for the system mono and multielement fo
llow the order Cu2 +> Zn2 +> Cd2+. For comparison model method was used Akaike's where proved that the Langmuir model is the best. With respect to the study of adsorption column, the breakthrough curves indicate that saturation occurs in the same volume of 35 mL. The use of the eluent 0.1 M HCl, allowed to recover 100% of the adsorbed ions. The column was used for three cycles to verify their potential use, and it was proved that in the three-cycles can recover 100% of the metals, which means an optimum
efficiency of the spheres of silica-APTS-EDTA.
| Identifer | oai:union.ndltd.org:IBICT/oai:www.teses.ufc.br:7251 |
| Date | 02 August 2013 |
| Creators | Francisca Renata Lopes da Silva |
| Contributors | Ãngela Martha Campos Arriaga, Francisco Geraldo Barbosa, Jackson Nunes e Vasconcelos |
| Publisher | Universidade Federal do CearÃ, Programa de PÃs-GraduaÃÃo em QuÃmica, UFC, BR |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFC, instname:Universidade Federal do Ceará, instacron:UFC |
| Rights | info:eu-repo/semantics/openAccess |
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