Ni(II) Adsorption on Biochars Produced from Different Types of Biomass

The objective of this study was to demonstrate biochar’s effectiveness on Ni(II) removal from aqueous solutions by adsorption on three different biochars. Three different waste feedstocks, namely sewage sludge, exhausted olive pomace and the organic fraction of municipal solid waste, were used to pr...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2020-05, Vol.231 (5), Article 206
Main Authors: Mourgela, Rafaila-Nikola, Regkouzas, Panagiotis, Pellera, Frantseska-Maria, Diamadopoulos, Evan
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Biomass
Cation exchange
Cation exchanging
Cations
Charcoal
Climate Change/Climate Change Impacts
Coefficients
Computer simulation
Correlation coefficient
Correlation coefficients
Earth and Environmental Science
Environment
Environmental monitoring
Exchange capacity
Hydrogeology
Kinetics
Municipal solid waste
Municipal waste management
Nickel
pH effects
Pyrolysis
Refuse and refuse disposal
Removal
Sewage
Sewage sludge
Sludge
Soil Science & Conservation
Solid waste management
Water Quality/Water Pollution
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Summary:The objective of this study was to demonstrate biochar’s effectiveness on Ni(II) removal from aqueous solutions by adsorption on three different biochars. Three different waste feedstocks, namely sewage sludge, exhausted olive pomace and the organic fraction of municipal solid waste, were used to produce biochar through pyrolysis at 300 °C, under inert conditions. The obtained biochars were characterized regarding their main properties and then evaluated as potential Ni(II) adsorbents. All investigated materials showed high adsorption efficiency in the range of 78–97%, with the biochar derived from SS exhibiting the best results, possibly because of its higher cation exchange capacity. Ni(II) removal rates were higher when the adsorption experiments were conducted at natural pH, while the removal efficiency under adjusted pH (acidic or alkaline) was slightly lower. The pseudo-second-order kinetic model adequately described the adsorption kinetics depicting high correlation coefficients, while the Freundlich adsorption isotherm model was successful in simulating equilibrium of adsorption.
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-020-04591-1