Estudio de la actividad antifúngica de materiales conteniendo carbón proveniente de pilas en desuso

BELLOTI NATALIA; IGAL KATHERINE; VAZQUEZ PATRICIA; JORGE E. SAMBETH

REVISTA MATéRIA

UNIV FED RIO DE JANEIRO

Lugar: Rio de Janeiro; Año: 2018 vol. 23 p. 1 - 8

1517-7076

The large number of batteries that are discarded and the environmental impact that the inadequate disposi-tion of the waste of the same produces impelled to its recycling. Both alkaline and zinc-carbon batteries have as their main components zinc and carbon mixed with other oxides, in their internal fill. In this work, the silica synthesis was carried out using the sol-gel method from the tetraethylorthosilicate pre-cursor and the ammonium hydroxide catalyst, carbon from the recycling of disused batteries was added in 0.1, 1.0 and 10.0 C % (w/w), respectively. This support was functionalized by 3-aminopropyltriethoxysilane in a 1: 1 ratio and subsequently it was impregnated by the incipient wetness with silver nitrate, resulting in 1 and 2% Ag (w/v) adsorbed. These solids were characterized by SBET, DRX, potentiometric titration, SEM-EDXand TEM techniques. The antifungal activity of the solids was assessed against the fungi Chaetomium glo-bosum, Aspergillus sp. and Cladosporium sp. by plaque inhibition test. The best results obtained showed a degree of inhibition close to 100% against Cladosporium sp. with samples impregnated at both Ag concentra-tions. In a next stage modifications will be made in the synthesis of the siliceous material to increase its anti-fungal effectiveness.