KMnO4 Modified Carbon Prepared from Waste of Pineapple Leaf Fiber Production Processing for Removal of Ferric Ion from Aqueous Solution
Sumrit Mopoung and Thaksaphon Bunterm
DOI : 10.3844/ajassp.2016.814.826
American Journal of Applied Sciences
Volume 13, Issue 6
KMnO4 modified carbon materials from waste of pineapple leaf fiber production processing were prepared and characterized. The effects of % weight of KMnO4 (0-5 %wt) and carbonization temperature (500-700°C) were studied by SEM-EDS, XRD, FTIR and BET. The KMnO4 modified waste carbon was used for Fe3+ removal from aqueous solutions. The effects of KMnO4 modification, contact time, pH and loading were evaluated. The Langmuir isotherm and Freundlich isotherm were also used for evaluation of Fe3+ adsorption by KMnO4 modified waste carbon. The results show that MnO2 deposited on the surface of KMnO4 modified waste carbon with some heterogeneity. The OH, CO and MnO groups are major functional groups on the surface of KMnO4 modified carbon. The BET surface area and total pore volume of modified waste carbon is increased with increasing weight % of KMnO4 and carbonization temperature, while the average pore size follows an inverse trend. The Fe3+ adsorption on modified waste carbon reaches equilibrium within 60 min. The amount of Fe3+ adsorbed on the modified waste carbon increases with increasing pH, reaches maximum at pH of about 4.7 and then sharply decreases at pH above 7. Both Langmuir and Freundlich isotherms were fitted for data a Fe3+ adsorption on modified waste carbon with 25.25 mg g-1 as theoretical maximum adsorption capacity.
© 2016 Sumrit Mopoung and Thaksaphon Bunterm. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.