Activated biochar derived from cactus fibres – Preparation, characterization and application on Cu(II) removal from aqueous solutions

Hadjittofi, Loukia; Prodromou, Melpomeni; Pashalidis, Ioannis

doi:10.1016/j.biortech.2014.03.073

Cited by 181 publications

(84 citation statements)

References 15 publications

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“…In addition, the presence of microchannels permits rapid fluid and a much higher amount of substances to be adsorbed by the surface active sites [11]. On the other hand, surface analysis of activated biochar by BET measurements indicates that there is no internal mesoporous surface (BET surface \5 m 3 g -1 ).…”

Section: Resultsmentioning

confidence: 99%

“…The adsorbent used in this study was activated biochar prepared from O.ficus indica cactus fibres, which were separated from dried cladodes. The preparation and characterization of the activated biochar product is extensively described elsewhere [11].…”

Section: Chemicals and Materialsmentioning

confidence: 99%

“…Because of their fibrous structure cactus fibres as precursor material, are expected to result in a relatively robust low-cost product with large external surface available for sorption and increased metal removal efficiency [9][10][11]. The main goal of the study is the investigation of the U(VI) sorption on activated biochar by conventional batch experiments in combination with FTIR spectroscopy to better characterize surface-bound species and evaluate thermodynamic parameters, which are of fundamental importance for the development of water treatment technologies related to toxic metal removal from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

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Uranium sorption from aqueous solutions by activated biochar fibres investigated by FTIR spectroscopy and batch experiments

Hadjittofi

Pashalidis

2014

J Radioanal Nucl Chem

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The efficiency of activated biochar fibres obtained from Opuntia ficus indica regarding the sorption of hexavalent uranium (U(VI)) from aqueous solutions has been investigated by batch experiments, as a function of various physicochemical parameters, and FTIR spectroscopy prior and after U(VI) sorption. The experimental results show that the activated biochar fibres possess extraordinary sorption capacity for U(VI) even in acidic solutions (q max = 210 g kg -1 ), which is attributed to the formation of inner-sphere complexes with the surface carboxylic moieties, available in high density on the lamellar structures of the bio-sorbent. The adsorption process is described by a two-step exothermic reaction.

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Section: Resultsmentioning

confidence: 99%

Section: Chemicals and Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Uranium sorption from aqueous solutions by activated biochar fibres investigated by FTIR spectroscopy and batch experiments

Hadjittofi

Pashalidis

2014

J Radioanal Nucl Chem

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“…Results from this study indicated that BSG BC can act as an effective surface adsorbent to adsorb pymetrozine. This may be attributed to the binding of pymetrozine molecules to functional groups on the active areas on the BC surface, including hydroxyl, carboxyl, methoxyl, and phenolic groups (Hadjittofi et al 2014). Oleszczuk et al (2012) also reported that BC micro-structure was responsible for the enormous adsorption capacity on pymetrozine such as the laminar structure inner fibers and its surface area function groups.…”

Section: Discussionmentioning

confidence: 99%

Removal of the Pesticide Pymetrozine from Aqueous Solution by Biochar Produced from Brewer's Spent Grain at Different Pyrolytic Temperatures

Xi¹,

Yan²,

Quan³

et al. 2014

BioResources

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Biochar (BC) produced from brewer's spent grain (BSG) via slow pyrolysis at 300, 400, 500, 600, and 700 °C was characterized and investigated as an adsorbent for the removal of the pesticide pymetrozine from aqueous solution. Batch BSG BCs adsorption experiments were carried out under various conditions (such as pH, pymetrozine concentration, and BC dosage) to adsorb the pymetrozine. The BSG BCs adsorption pymetrozine capacities were increased by 21.4% to 55.5% under pyrolysis temperatures of 300, 400, 500, and 600 °C compared to 700 °C with a pyrolysis time of 2 h and by 19.0% to 52.1% at 4 h. At solution pH values of 2, 4, 6, and 8, the adsorption capacities were increased by 9.6% to 39.5% compared with that at pH 10. A similar adsorption tendency was found for the different BCs dosage. In the first 60 min, BC absorbed 70% to 80% pymetrozine. The Langmuir and Freundlich model were highly correlated with BC adsorption. The magnitude of free energy decreased by 32.2% to 47.3% with increasing temperature. The value of the enthalpy change showed the adsorption to be endothermic. The BSG BC had high efficiency in adsorbing pymetrozine and had great potential to prevent the water pollution and reuse the waste of the beer factory.

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“…One of the environmental problems experienced around the world originates from heavy metal pollution in wastewater [1], [2]. When these effluents (heavy metals) are discharged without proper treatment, the quality of receiving waters get degraded over time [3], causing severe harm to the environment and humans.…”

Section: Introductionmentioning

confidence: 99%

EXPERIMENTAL INVESTIGATION OF COPPER REMOVAL FROM AQUEOUS SOLUTION USING MUSA PARADISIACA AS A NOVEL ADSORBENT

Emenike¹,

Omole²,

Ngene³

et al. 2017

WIT Transactions on Ecology and the Environment

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The adoption of agricultural waste materials in the removal of heavy metals from contaminated waters has gained more recognition in recent times. This study capitalizes on the production of adsorbents from one of the predominant agricultural waste materials (Plantain Peel) in Ado-Odo Ota, to access its metal-removal efficiency. This work investigated Cu 2+ adsorption using activated carbon processed from chemically modified unripe plantain (Musa paradisiaca) peel. Adsorption studies were performed using batch experiments wherewith the influence of pH of the solution, initial concentration, temperature and contact time have been cross-examined. The results displayed a 99.8% removal efficiency of Cu 2+ at pH 7.5, 30°C and 150 mg/L concentration. The equilibrium adsorption capacity of unripe Musa paradisiaca peel has been obtained using linear models of Langmuir and Freundlich isotherms. The result is poised to elucidate the metal retention mechanism as a process involving ion exchange as the divalent metal ion binds to the activated unripe plantain peel.

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Activated biochar derived from cactus fibres – Preparation, characterization and application on Cu(II) removal from aqueous solutions

Cited by 181 publications

References 15 publications

Uranium sorption from aqueous solutions by activated biochar fibres investigated by FTIR spectroscopy and batch experiments

Uranium sorption from aqueous solutions by activated biochar fibres investigated by FTIR spectroscopy and batch experiments

Removal of the Pesticide Pymetrozine from Aqueous Solution by Biochar Produced from Brewer's Spent Grain at Different Pyrolytic Temperatures

EXPERIMENTAL INVESTIGATION OF COPPER REMOVAL FROM AQUEOUS SOLUTION USING MUSA PARADISIACA AS A NOVEL ADSORBENT

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