Determinación de la capacidad de bioadsorción en la cáscara de naranja para la remoción de cadmio en aguas residuales de dos fábricas de textiles en el cantón Pelileo provincia de Tungurahua.

Abstract

The present investigation work determined the capacity of bio-absorption in the orange peel for the removal of Cadmium in waste waters of two textile factories in the Pelileo canton, Tungurahua province. For this, the basic elements C, H and N of the orange peel were characterized with the automated combustion method Dumas, in the equipment FLASSH 2000 Series CHNS/S; the effluents were collected in function of the established statement by the INEN 2169 norm; a physical-chemical analysis of the effluents was carried out; for the Cadmium concentration, the TNT 852 method of the Environmental Services Lab was implemented in the spectrophotometer of atomic absorption; the absorption capacity was determined from two experimental essays; in the first factorial-type one two particle sizes were used in three relations g/l; the favorable results were those of the assay where a major absorption percentage was determined; this was used in the second essay where the influence of the pH was evaluated acidifying the samples to 3 and 5 with a completely at random design (DCA); The results indicated that a lower particle size (3mm) with a higher relation of grams of bio-absorbent per liter of effluent (20g/l) and with a pH of 5, a reduction in the Cadmium concentration is obtained, from 12.21 mg/l Cadmium in the effluent 1 was reduced to a concentration of 6.51 mg/l with an adsorption percentage of 46.65% and from 11.37 mg/l, it was reduced to 5.77 mg/l which represents an absorption of 49.22%; the results are conclusive; the orange peel is capable of absorbing the Cadmium ions, improving the results upon acidifying the effluent; this is why; it can be considered to be an alternative in the treatment of effluents from the textile industry.