Effective use of activated carbon from olive stone waste in the biosorption removal of Fe(III) ions from aqueous solutions

Bobadilla, Marina Corral; Lostado-Lorza, Rubén; Somovilla-Gómez, Fátima; Escribano-García, Rubén

doi:10.1016/j.jclepro.2021.126332

Cited by 43 publications

(24 citation statements)

References 35 publications

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“…Reagents used for the preparation of 12 g MAG-OSBC was: NaOH, iron (III) and iron (II), with a cost of 0.024 $, 0.88 $, and 0.43 $, respectively. The overall cost per kg of MAG-OSBC is 126.45 $ [29]. Though the cost of the magnetic biochar was higher compared to OSBC, it is important to consider the easiness of separation using an external magnet.…”

Section: Economics and Financial Assessmentmentioning

confidence: 99%

“…This design is utilized if the number of the predictors is between 3 and 12. One of the advantages of the BB design is that variables are not studied at their extreme levels, meaning that the design does not have runs that measure all variables at the highest points and the lowest points simultaneously [14,29,38,39,56]. Compared to the other RSM designs, e.g., the central composite designs (CCD), BB design entails fewer runs [57].…”

Section: Box-behnken (Bb) Designmentioning

confidence: 99%

“…As per the International Olive Council, Spain, as a major producer of olive oil, produces around 625,600 tons/year [28]. The Food and Agriculture Organization (FAO) data report of 2019 shows 21 million tons annual production of olives worldwide [29]. Yet, this industry and with the production of various byproducts are facing serious sustainability problems.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption Characteristics of Pristine and Magnetic Olive Stones Biochar with Respect to Clofazimine

et al. 2021

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Olive stone biochars (OSBC), both pristine and following magnetization (MAG–OSBC), were utilized as eco-friendly and cost-effective sorbents for the antituberculosis, clofazimine (CLOF). Morphologies, textures, surface functionalities, and thermal stabilities of both adsorbents were explored using SEM, EDX, TEM, BET, FT-IR, Raman, XRD and TGA analyses. SEM analysis showed meso- and macroporous surfaces. BET data showed that the MAG–OSBC possesses a larger surface area (33.82 m2/g) and pore volume. Batch adsorption studies were conducted following the experimental scenario of Box–Behnken (BB) design. The adsorption efficiency of both adsorbents was evaluated in terms of the % removal (%R) and the sorption capacity (qe, mg/g). Dependent variables (%R and qe) were maximized as a function of four factors: pH, sorbent dose (AD), the concentration of CLOF ([CLOF]), and contact time (CT). A %R of 98.10% and 98.61% could be obtained using OSBC and MAG–OSBC, respectively. Equilibrium studies indicated that both Langmuir and Freundlich models were perfectly fit for adsorption of CLOF. Maximum adsorption capacity (qmax) of 174.03 mg/g was obtained using MAG–OSBC. Adsorption kinetics could be best illustrated using the pseudo-second-order (PSO) model. The adsorption–desorption studies showed that both adsorbents could be restored with the adsorption efficiency being conserved up to 92% after the sixth cycles.

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Section: Economics and Financial Assessmentmentioning

confidence: 99%

Section: Box-behnken (Bb) Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption Characteristics of Pristine and Magnetic Olive Stones Biochar with Respect to Clofazimine

et al. 2021

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“…This encompassed the energy expenditure by both the oven and the furnace, used for drying and burning the SCG, respectively. The overall cost/kg is therefore~15.36 $ compared to an ordinary price of 124 $/0.5 kg (Sigma-Aldrich website, and this cost does not include the shipping fees to Qatar) [39].…”

Section: Economics and Financial Assessmentmentioning

confidence: 99%

Biochar of Spent Coffee Grounds as Per Se and Impregnated with TiO2: Promising Waste-Derived Adsorbents for Balofloxacin

2021

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Biochars (BC) of spent coffee grounds, both pristine (SCBC) and impregnated with titanium oxide (TiO2@SCBC) were exploited as environmentally friendly and economical sorbents for the fluroquinolone antibiotic balofloxacin (BALX). Surface morphology, functional moieties, and thermal stabilities of both adsorbents were scrutinized using SEM, EDS, TEM, BET, FTIR, Raman, and TG/dT analyses. BET analysis indicated that the impregnation with TiO2 has increased the surface area (50.54 m2/g) and decreased the pore size and volume. Batch adsorption experiments were completed in lights of the experimental set-up of Plackett–Burman design (PBD). Two responses were maximized; the % removal (%R) and the adsorption capacity (qe, mg/g) as a function of four variables: pH, adsorbent dosage (AD), BALX concentration ([BALX]), and contact time (CT). %R of 68.34% and 91.78% were accomplished using the pristine and TiO2@SCBC, respectively. Equilibrium isotherms indicated that Freundlich model was of a perfect fit for adsorption of BALX onto both adsorbents. Maximum adsorption capacity (qmax) of 142.55 mg/g for SCBC and 196.73 mg/g for the TiO2@SCBC. Kinetics of the adsorption process were best demonstrated using the pseudo-second order (PSO) model. The adsorption-desorption studies showed that both adsorbents could be restored with the adsorption efficiency being conserved up to 66.32% after the fifth cycles.

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“…The generated EDX analysis of the elementary composition coincides with the FTIR spectrum, which revealed a higher number of sharp peaks and broad bands of TiO 2 NPs_CE compared to TiO 2 NPs_PPE. This could be attributed to the C=O stretching vibration of the carbonyl group and the C=C aromatic stretching vibration [51]. Therefore, the seeds primed with TiO 2 NPs_CE revealed an enhanced carbon (C) signal due to the imidazole ring of the caffeine polymer in addition to the more activated carbons derived during the processing of the coffee ground and the preparation of CE.…”

Section: Discussionmentioning

confidence: 95%

Integrated Approaches for Adsorption and Incorporation Testing of Green-Synthesized TiO2NPs Mediated by Seed-Priming Technology in Punica granatum L.

et al. 2022

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Seed priming is a novel approach that is undertaken to improve seed germination and therefore potentially enhance growth and yield. Low-cost, eco-friendly, and efficient seed treatment as a means of enhancing growth and yield is still being sought for high-value crops such as pomegranates (Punica granatum L.), particularly in areas situated at high altitudes such as the Taif region. The uptake of nanoparticles (NPs) by plants provides a potential pathway for NP exposure. Therefore, it is imperative to understand NP uptake via seed priming and their unique properties within plants. In the present study, titanium dioxide nanoparticles (TiO2NPs) were green-synthesized and utilized as priming agents for pomegranate seeds at a concentration of 40 mg/mL for 24 h. The adsorption of NPs was verified by scanning electron microscopy (SEM) and energy dispersive X-ray analysis/spectroscopy (EDX), while their incorporation was detected by transmission electron microscopy (TEM). To validate the EM results, X-ray fluorescence (XRF) and inductively coupled plasma optical emission spectroscopy (ICP–OES) techniques were further undertaken. The results confirmed the successful synthesis of pure anatase TiO2NPs by employing aqueous extracts of pomegranate fruit peel (PPE) and coffee ground beans (CE). All of the analytical techniques employed in this research confirmed the incorporation of TiO2NPs inside seeds, even after storage during priming treatment. This study lays the foundation for future sustainable seed technologies in terms of crop productivity and seed germination.

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Effective use of activated carbon from olive stone waste in the biosorption removal of Fe(III) ions from aqueous solutions

Cited by 43 publications

References 35 publications

Adsorption Characteristics of Pristine and Magnetic Olive Stones Biochar with Respect to Clofazimine

Adsorption Characteristics of Pristine and Magnetic Olive Stones Biochar with Respect to Clofazimine

Biochar of Spent Coffee Grounds as Per Se and Impregnated with TiO2: Promising Waste-Derived Adsorbents for Balofloxacin

Integrated Approaches for Adsorption and Incorporation Testing of Green-Synthesized TiO2NPs Mediated by Seed-Priming Technology in Punica granatum L.

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