2008
DOI: 10.1590/s0100-40422008000700007 View full text |Buy / Rent full text
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Abstract: Recebido em 3/7/07; aceito em 16/4/08; publicado na web em 26/9/08 OXIDATION OF ORGANIC COMPOUNDS IN WASTEWATER FROM THE HUMID PROCESSING OF COFFEE BERRIES. Materials based on pure iron oxide and impregnated with niobia (Nb 2 O 5 ) were prepared. Their catalytic activities were tested on the oxidation of compounds present in the wastewater from the processing of coffee berries. Particularly caffeine and catechol were tested. The oxidation reactions were carried out with the following systems (i) UV/H 2 O 2 , (… Show more

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“…5 Outra possível aplicação é como agente oxidante de compostos poluentes em efluentes de despolpa do café, no caso, catecóis. 6 Muitas vezes é praticamente impossível estudar teoricamente a própria enzima, o que acaba gerando a busca de moléculas que venham mimetizar a ação destas enzimas. Assim, um complexo denominado "análogo sintético" é aquele que reproduz as propriedades estruturais do sítio ativo da metaloenzima, tais como o ambiente de coordenação e a geometria.…”
Section: Introductionunclassified
“…However, this efficiency was observed only after 24 h of reaction (about 97% of discoloration) (Castro et al, 2009b). Gonçalves and co-workers evaluated the oxidation of caffeine catalyzed by iron oxide dispersed over niobia, reaching 98% of oxidation after 120 min of reaction (Gonçalves et al, 2008).…”
Section: Introductionmentioning