PEMBUATAN NANOFIBER PADUAN KITOSAN-PEKTIN-POLIVINIL ALKOHOL (PVA) DENGAN ELECTROSPINNING SEBAGAI ADSORBEN BIRU METILEN; SYNTHESIS OF NANOFIBER COMPOSITE CHITOSAN-PECTIN-POLY VINYL ALCOHOL (PVA) WITH ELECTROSPINNING AS ADSORBENT FOR METHYLENE BLUE
EKA WIHASTI FEBRI SUHARYANI, Siswanta
2015 | Disertasi | FMIPANanofibers composite of chitosan-pectin-PVA have been made by using electrospinning method to study adsorption-desorption process of methylene blue. The nanofiber was characterized by using optical microscope, FTIR and SEM. Stability test of nanofiber in acid-base medium and its water adsorption were also tested. The adsorption activities of nanofiber towards methylene blue was studied including the effect of time, pH, concentration of methylene blue. The adsorption kinetics, adsorption isotherm and desorption activities of nanofiber in NaCl solution were also studied. The result of this research showed that nanofibers have been succesfully made with fibers diameter average of 282 nm. The optimum condition of methylene blue adsorption occurs at pH 7 with concentration of 175 mg L-1. Optimum adsorption of nanofiber 1:1:8 (volume ratios of chitosan: pectin: PVA) is 1,65x10-4 mol g-1 at 40 minutes of contact time and the percentage of desorption is 57,52%. Adsorption kinetics has been found to follow the pseudo second order reaction and the adsorption fits Langmuir isotherm.
Kata Kunci : adsorption; blue methylene; chitosan; electrospinning, pectin; PVA.
