For biodegradation tests, we used as a culture medium dextrose and potato agar (DPA BD Bioxon, Edo. de Mex., México), bacteriological agar (BD Bioxon, Edo. de Mex., México), trisodium citrate pentahydrate (Merck, Edo. de Mex., México), monophasic anhydrous potassium phosphate (Merck, Edo. de Mex., México), monobasic anhydrous potassium phosphate (J,T, Baker, Phillipsburg, NJ, USA), copper (II) pentahydrate sulfate (Sigma-Aldrich, St. Louis, MO, USA), manganese sulfate monohydrate, anhydrous orthoboric acid (JT Baker, Phillipsburg, NJ, USA), chloroform (Sigma-Aldrich, St. Louis, MO, USA), magnesium sulfate heptahydrate (Merck), sucrose (Sigma-Aldrich, St. Louis, MO, USA) and glycerol 99.5% purity (Sigma-Aldrich, St. Louis, MO, USA).
The fungus Alternaria spp. isolated in our laboratory was used for the biodegradation.