Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
Volume 14, Issue 2, Pages 341-352Publisher
SPRINGER
DOI: 10.1007/s13762-016-1150-9
Keywords
Aegle Marmelos powder; Methylene blue biosorption; Biosorbent characterization; Kinetics of adsorption
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Funding
- Department of Science and Technology, Government of India under Water Treatment Initiative programme
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Dried, mature leaves of Aegle Marmelos tree were converted to a powder, which was used as a biosorbent for dyes in water with methylene blue as a case study. The biosorbent had a surface area of 52.63 mg/g, and FTIR spectra showed the presence of -COOH, -NH2, -R-SC=O (thioester) and R1-S(=O, =O)-N(-R2, -R3) groups on the surface. The particles were found to be porous in nature from scanning electron micrographs, and EDX measurements showed the elements C, O, Na, Mg, K, Ca and Fe on the surface. Batch adsorption experiments showed that the adsorption of the dye was preferred at near-neutral conditions. Adsorption equilibrium was achieved in similar to 120 min with maximum dye uptake of 19.9 mg/g. Investigation into the kinetics of adsorption indicated that second-order kinetics gave the best fit to the experimental data, and a rate coefficient of 8.0 x 10(-2) to 32.3 x 10(-2) g mg(-1) min(-1) was obtained.
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