Assessment of the Cu(II) and Pb(II) removal efficiency of aqueous solutions by the dry biomass Aguapé: kinetics of adsorption

Plant-based materials are promising adsorbents for treating liquid effluents. This study describes the kinetic and equilibrium parameters that best represent the copper(II) and lead(II) removal process by Eichhornia crassipes (Aguapé) dry biomass from aqueous solution, using a batch adsorption syste...

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Bibliographic Details
Published in:Environmental monitoring and assessment 2019-12, Vol.191 (12), p.751-10, Article 751
Main Authors: de Freitas, Franciele, Battirola, Leandro Dênis, Arruda, Rafael, de Andrade, Ricardo Lopes Tortorela
Format: Article
Language:English
Subjects:
Adsorption
Aquatic plants
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Biodegradability
Biodegradation, Environmental
Biomass
Copper
Copper - analysis
Copper compounds
Earth and Environmental Science
Ecology
Ecotoxicology
Effluents
Eichhornia - metabolism
Environment
Environmental Management
Environmental Monitoring
Environmental science
Equilibrium
Freshwater plants
Heavy metals
Hydrogen-Ion Concentration
Kinetics
Lead - analysis
Materials recovery
Metal concentrations
Metals
Monitoring/Environmental Analysis
Plants (botany)
Removal
Wastewater treatment
Water - chemistry
Water Pollutants, Chemical - analysis
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Summary:Plant-based materials are promising adsorbents for treating liquid effluents. This study describes the kinetic and equilibrium parameters that best represent the copper(II) and lead(II) removal process by Eichhornia crassipes (Aguapé) dry biomass from aqueous solution, using a batch adsorption system. The plants were washed, dried, and reduced to small particles. The adsorption kinetics were assessed by varying the metal concentrations in 5, 10, and 20 mg L –1 and a control treatment (without metals) with a mixture contact time of between 5 and 720 min. Equilibrium data were fitted to the Langmuir and Freundlich models. Kinetic assay revealed fast adsorption: kinetic equilibrium was attained within 2 h with a removal efficiency of ~ 60%. The results demonstrated a fast recovery cycle of metals using the biosorbent. The biomass of E. crassipes is low cost with potential for use as a biosorbent to remove metals from solutions.
ISSN:0167-6369
1573-2959
DOI:10.1007/s10661-019-7933-y