Biosorption of Methylene Blue Dye Using Natural Biosorbents Made from Weeds

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, (L.) (CCLHR) and (PMT) found in the Amazon region of Belém state of Pará-Brazil, contribute to the problem of water contamination by the removal of the methyl...

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Bibliographic Details
Published in:Materials 2019-08, Vol.12 (15), p.2486
Main Authors: Silva, Francisco, Nascimento, Lorena, Brito, Matheus, da Silva, Kleber, Paschoal, Jr, Waldomiro, Fujiyama, Roberto
Format: Article
Language:English
Subjects:
Activated carbon
Adsorbents
Adsorption
Aqueous solutions
Chemical contaminants
Dyes
Effluents
Environmental impact
Forestry
Fourier transforms
Functional groups
Humidity
Livestock
Methylene blue
Morphology
Organic chemistry
Porous materials
Raw materials
Spectrum analysis
Wastewater treatment
Water treatment
Weeds
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Summary: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, (L.) (CCLHR) and (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 of methylene blue dye in effluents.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma12152486