Abstract

TALAVERA NUNEZ, María Elena et al. Application of nanocompositos clay -carboximethylquitosan - nanoparticles of silver in filters for the treatment of water of rural areas of Camana, Arequipa. Rev. Soc. Quím. Perú [online]. 2018, vol.84, n.4, pp.499-512. ISSN 1810-634X.

A filter made of a nanocomposite of clay - carboximethylchitosan - silver nanoparticles was created to eliminate bacteria and anions in water for human consumption. The silver nanoparticles were obtained by reduction of silver nitrate 1mM, with carboximethyl chitosan at 0.01% and sodium borohydrido 2mM as starter of the reduction. Then the clay filters were made with wood sawdust as the pore maker in a 2:1 proportion; it was molded, dried and sinterized at 800°C for 3 hours. Quickly the filters were impregnated with the colloidal dispersion of carboximethyl chitosan - silver nanoparticles by immersion for 12 hours. Four water sampling points were defined: Huacapuy, La Punta, Plaza de Quilca, Caleta de Quilca. When evaluating the filtering capacity of the filters, it was found that the following were removed: conductivity 84.03% in La Plaza de Quilca, sulfates 85.48% in La Plaza de Quilca; 93.93% chlorides in La Plaza de Quilca. On the other hand, fecal coliform bacteria and total coliforms were removed 100% at La Punta and Plaza de Quilca. No coliform bacteria were found in Huacapuy or in the Caleta de Quilca. So it can be confirmed that the results have a significant removal percentage in the elimination of anions, in terms of total coliform bacteria and fecal coliforms were removed in its entirety

Keywords : clay; filter; carboximethyl chitosan; silver nanoparticles; nanocomposite.

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