Aplication of Chitosan in reemoval of Molibdenium, Arsenic and Chromium from contaminated water and groundwaters

M. FRASCAROLI; B. PÉREZ MORA; J. GONZÁLEZ; F. BERTONI; S. BELLÚ; M. MANGIAMELI

Servia

Congreso; 18 Congreso Internacional de Metalurgia y Materiales (18 SAM-CONAMET); 2018

SAM - Asociación Argentina de Materiales

Water pollution by heavy metals represents a serious problem around the world. Among various treatment techniques for water remediation, adsorption is an effective and versatile method due to the low cost, effectiveness and implicity. Chitosan is a cationic polysaccharide with an excellent adsorption capacity of heavy metal ions. Molybdenum is a trace element that is present in plants and animals. Pollution by molybdenum species in water becomes a serious danger to general population.Arsenic is an important environmental element because of its hign toxicity at the leve! of parts per billion. Chromium is a very toxic heavy metal, and it is discharged in the effluents from many industries. The goal of this study was the application of chitosan as a sorbentfor Mo(VJ), As(V) and Cr(VJ) removal. Chitosan has a high adsorption capacity (265 mg molybdate/ g chitosan; 11 O mgarsenatel g chitosan; 21 J mg chromate/ g chitosan) at 20 ºC and pH 2.7- 4.5. SEM images showed that morphological surface changes happen after metal adsorption. The results obtained demonstrate the ability of chitosan to remove these toxic ions from water and support [urther implementation of the system to decontaminate water at higher scale.