Preparation of Nata de Pina Product and Its Aplication in Cobalt(II) Binding.

Abstract

Pineapple’s peel waste fermentated with Acetobacter xylinum becomes a useful product. The product is called nata de pina. Chemically modified nata was estimated as more excellent adsorben in adsorbing heavy metals as compared with unmodified nata. Cobalt is transition metal which is needed in low concentration but it could be toxic in high concentration, for example it caused cancer. Modifications in this research on the nata used sulfuric acid, sodium hydroxide, and monochloroacetic acid (conversion to carboxymethyl cellulose). Chemically modified nata was characterized using Fourier transfom infrared (FTIR). The value of adsorption capacity from each chemically modified and unmodified nata toward cobalt(II) was NaOH modified > unmodified > sulfuric acid modified > monochloroacetic acid modified with maximum value of adsorption capacity were 520.89, 420.67, 95.67, and 47.39 μg/g adsorben, respectively. The value of adsoption efficiency from each chemically modified and unmodified nata toward cobalt(II) was NaOH modified > unmodified > sulfuric acid modified > monochloroacetic acid modified with maximum value of adsorption efficiency were 40.71, 23.99, 8.26, and 4.25%, respectively. Chemically modified nata could adsorb 19.24% cobalt more than the unmodified nata.