Biosorption of Methylene Blue Dye Using Natural Biosorbents Made from Weeds

Materials
Francisco SilvaRoberto Fujiyama

Abstract

The purpose of this work is to make use of vegetables that, although widely found in nature, there are few applications. The weeds used here, Cyanthiliumcinereum (L.) H. Rob (CCLHR) and Paspalummaritimum (PMT) found in the Amazon region of Belém state of Pará-Brazil, contribute to the problem of water contamination by the removal of the methylene blue dye through the biosorption process, taking advantage of other materials for economic viability and processing. The influences of parameters such as, biosorbent dose, contact time, and initial concentration of dye were examined. The characterizations were realized using SEM to verify the morphology of the material and spectroscopy in the FTIR region. As for the adsorption mechanism, the physical adsorption mechanism prevailed. The time required for the system to reach equilibrium for both biosorbents was from 50 min, following a kinetics described by the pseudo-second order model. The adsorption isotherm data for PMT were better adjusted to the Langmuir model and the biosorption capacity (qmax) value was (56.1798 mg/g). CCLHR was better adjusted to the Freundlich model and its maximum biosorption capacity was 76.3359 mg/g. Thus, these weed species are promising for the biosorption...Continue Reading

References

Oct 10, 2001·Advances in Colloid and Interface Science·A Dabrowski
Feb 26, 2003·Water Research·Qingye Sun, Linzhang Yang
Jul 5, 2005·Bioresource Technology·Grégorio Crini
Sep 20, 2008·Journal of Hazardous Materials·Md Tamez UddinMd Rukanuzzaman
Mar 7, 2009·Journal of Environmental Management·V K Gupta, Suhas
May 19, 2009·Journal of Colloid and Interface Science·Betina RoyerClaudio Airoldi
May 19, 2009·Journal of Hazardous Materials·Chih-Huang WengTai-Wei Tzeng
Jan 2, 2010·Journal of Hazardous Materials·Mohd RafatullahAnees Ahmad
Jun 18, 2010·Journal of Hazardous Materials·Betina RoyerClaudio Airoldi

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