Open AccessRemoval of Methylene Blue Dye using Carbon Derived from Bulb of Zephyranthes citrina: Adsorption and Kinetic Studies
Author(s) -
Jai Prakash,
S. Vedanayaki,
K. Karthick
Publication year - 2020
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22562
Subject(s) - adsorption , methylene blue , chemistry , carbonization , nuclear chemistry , chromatography , aqueous solution , organic chemistry , catalysis , photocatalysis
The studies open up an innovative approach and investigate porous, efficient raw carbon fromZephyranthes citrina bulb, which was used as an adsorbent to remove organic dyes. The well-driedand finely powdered Zephyranthes citrina bulb was carbonized at 900 ºC. The carbonized crude Z.citrina sample was characterized by FT-IR, UV-visible, scanning electron microscopy (SEM), BET,X-ray diffraction (XRD) techniques and their adsorption potential to remove the basic methylene bluedye from an aqueous sample. Adsorption studies comprise both adsorption isotherm and kineticmethods. The processes were carried out with diverse adsorbate concentrations and adsorbent quantitiesat various time intervals in the batch process. Kinetic models of Lagergren first order, pseudo-secondorder and intra particle diffusion were used to assess the kinetics and adsorption mechanism. Theresults revealed that the adsorption process follows the first order kinetic model of Lagergren. TheBET isotherm model confirmed that it has an excellent adsorption capacity in an adsorption process.Based on the results obtained, the maximum removal (81%) of dye was achieved in a solution containing50 mg of 50 mL dye at 3 h for methylene blue. The results indicated that the bulb of Zephyranthescitrina carbon is a proficient adsorption material and is also used as a cost effective alternative that canadsorb dye from an aqueous solution without activation treatment.