Kinetics, isotherm, and thermodynamic studies of methylene blue adsorption from water by Mytella falcata waste

This work evaluates the application of Mytella falcata shells, discarded in large quantities in the state of Alagoas, Brazil, as adsorbent for methylene blue dye (MB). It was investigated how the amount of adsorbent (M), the average particle diameter (G), and the agitation speed (A) affected the ads...

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Bibliographic Details
Published in:Environmental science and pollution research international 2017-08, Vol.24 (24), p.19927-19937
Main Authors: Silva, Társila S., Meili, Lucas, Carvalho, Sandra Helena V., Soletti, João Inácio, Dotto, Guilherme Luiz, Fonseca, Eduardo Jorge S.
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Animal Shells - chemistry
Animals
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Bivalvia - chemistry
Brazil
Coloring Agents - analysis
Data processing
Dyes
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Isotherms
Kinetics
Methylene blue
Methylene Blue - analysis
Particle Size
Research Article
Shells
Solid Waste
Surface Properties
Textile Industry
Thermodynamics
Waste Water Technology
Water Management
Water Pollutants, Chemical - analysis
Water Pollution Control
Water Purification - methods
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Summary:This work evaluates the application of Mytella falcata shells, discarded in large quantities in the state of Alagoas, Brazil, as adsorbent for methylene blue dye (MB). It was investigated how the amount of adsorbent (M), the average particle diameter (G), and the agitation speed (A) affected the adsorption. Kinetic and equilibrium studies were conducted, and the pseudo-second-order equation adequately represented the kinetic data and isotherms following Liu’s model ( q max  = 8.81 mg g −1 at 60 °C). The adsorption was spontaneous, favorable, and endothermic. Mytella falcata shell is a suitable adsorbent for MB and could potentially contribute to its removal from the environment.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-017-9645-6