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Negative influence of Ag and TiO2 nanoparticles on biodegradation of cotton fabrics

Lazić, Vesna, Radoičić, Marija, Šaponjić, Zoran, Radetić, Tamara, Vodnik, Vesna, Nikolić, Svetlana, Dimitrijević, Suzana, Radetić, Maja
Cellulose 2015 v.22 no.2 pp. 1365-1378
biodegradation, cellulose, endo-1,4-beta-glucanase, enzymatic hydrolysis, impregnated fabrics, lint cotton, nanoparticles, risk, scanning electron microscopy, silver, soil, titanium dioxide
Recently, many efforts have been made to efficiently impregnate different textile materials with metal and metal oxide nanoparticles in order to provide antimicrobial, UV protective or self-cleaning properties. Evidence of their environmental risks is limited at this point. The aim of this study was to explore the influence of Ag and TiO₂nanoparticles on biodegradation of cotton fabrics. Biodegradation behavior of cotton fabrics impregnated with Ag and TiO₂NPs from colloidal solutions of different concentrations was assessed according to standard test method ASTM 5988-03 and soil burial test. Degradation of cotton fabrics was also evaluated by enzymatic hydrolysis with cellulase. The morphology of fibers affected by biodegradation was analyzed by scanning electron microscopy (SEM). In order to get better insight into biodegradation process, dehydrogenase activity of soil has been determined. Ag and particularly TiO₂nanoparticles suppressed the biodegradation of cotton fabrics. The dehydrogenase activity of soil with cotton fabrics impregnated with TiO₂nanoparticles was the weakest. Severe damage of cotton fibers during the biodegradation process was confirmed by SEM.