Potential Use of Residual Sawdust of Eucalyptus globulus Labill in Pb (II) Adsorption: Modelling of the Kinetics and Equilibrium

Tovar, Candelaria Tejada; Villabona-Ortíz, Ángel; Ortega-Toro, Rodrigo; Mancilla-Bonilla, Humberto; Espinoza-León, Fran

doi:10.3390/app11073125

Cited by 13 publications

(12 citation statements)

References 53 publications

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“…O–H represented the stretching of hydroxyl, alcohol, and phenolic groups of cellulose fiber, lignin, and pectin, and C–H demonstrated the stretching of a methyl group (–CH 2 ) in cellulose and hemicellulose 40 . C=C referred to the stretching of aromatic rings corresponding to the lignin, and C–O was the stretching of alcohol and carboxylic acid of lignin and hemicellulose 41 . For SP, it detected the stretching of O–H at 3322.83 cm −1 , stretching of C–H at 2918.28 cm −1 , stretching of C=C at 1666.59 cm −1 , and stretching of C–O at 1245.34 and 1030.31 cm −1 illustrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

Powdered and beaded sawdust materials modified iron (III) oxide-hydroxide for adsorption of lead (II) ion and reactive blue 4 dye

Praipipat

Ngamsurach

Kosumphan

et al. 2023

Sci Rep

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The problems of lead and reactive blue 4 (RB4) dye contamination in wastewater are concerns because of their toxicities to aquatic life and water quality, so lead and RB4 dye removals are recommended to remove from wastewater before discharging. Sawdust powder (SP), sawdust powder doped iron (III) oxide-hydroxide (SPF), sawdust beads (SPB), and sawdust powder doped iron (III) oxide-hydroxide beads (SPFB) were synthesized and characterized with various techniques, and their lead or RB4 dye removal efficiencies were investigated by batch experiments, adsorption isotherms, kinetics, and desorption experiments. SPFB demonstrated higher specific surface area (11.020 m2 g−1) and smaller pore size (3.937 nm) than other materials. SP and SPF were irregular shapes with heterogeneous structures whereas SPB and SPFB had spherical shapes with coarse surfaces. Calcium (Ca) and oxygen (O) were found in all materials whereas iron (Fe) was only found in SPF and SPFB. O–H, C–H, C=C, and C–O were detected in all materials. Their lead removal efficiencies of all materials were higher than 82%, and RB4 dye removal efficiencies of SPB and SPFB were higher than 87%. Therefore, adding iron (III) oxide-hydroxide and changing material form helped to improve material efficiencies for lead or RB4 dye adsorption. SP and SPB corresponded to Langmuir model related to a physical adsorption process whereas SPF and SPFB corresponded to the Freundlich model correlated to a chemisorption process. All materials corresponded to a pseudo-second-order kinetic model relating to the chemical adsorption process. All materials could be reused more than 5 cycles with high lead removal of 63%, and SPB and SPFB also could be reused more than 5 cycles for high RB4 dye removal of 72%. Therefore, SPFB was a potential material to apply for lead or RB4 dye removal in industrial applications.

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Section: Resultsmentioning

confidence: 99%

Powdered and beaded sawdust materials modified iron (III) oxide-hydroxide for adsorption of lead (II) ion and reactive blue 4 dye

Praipipat

Ngamsurach

Kosumphan

et al. 2023

Sci Rep

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“…The broad peak in the region 3382 cm −1 is characteristic of the OH stretching vibration of phenol and carboxylic acid. This represents the moisture found in the ash since it presents hygroscopic characteristics 31‐35 …”

Section: Resultsmentioning

confidence: 99%

“…The peak at 2929 cm −1 belongs to CH stretching, common in the biomass components of hemicellulose, cellulose and lignin 31‐33,35‐37 . The peak at 2358 cm −1 is assigned to the stretching vibration of the alkyne CC group 38,39 …”

Section: Resultsmentioning

confidence: 99%

Valorization of biomass ash for the effective removal of dipyrone from water: an efficient and low‐cost option

Oliveira

Reck

Resende

et al. 2023

J of Chemical Tech & Biotech

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Background: In order to propose a destination for the bottom ash generated from biomass burning, its morphology, functional groups and mineral phases were studied. Dipyrone has been extensively used as an antipyretic, increased due to cases of COVID-19, and due to excretion by urine, incorrect disposal and industrial effluents has been destined to wastewater, being harmful to human and animal life. The present study proposes using biomass ash for the adsorption of dipyrone.Results: The characterization of biomass ash shows a sufficient surface area size for adsorption, and a mainly amorphous structure with some peaks of quartz, calcite and other mineral phases. The results show that the kinetic model which best describes the adsorption is the pseudo-first-order model. The Langmuir model best fits at 25 °C, and the Freundlich model best describes the adsorption at 35 and 45 °C. The thermodynamic parameters indicated that the process is endothermic with a maximum adsorptive capacity of 65.27 mg g −1 . In addition, the adsorption is spontaneous, disordered and chemical. The ionic strength study reveals that the adsorbent is promising for real effluent treatment and there is evidence that electrostatic interaction is not the primary adsorptive mechanism, agreeing with the result obtained from pH testing. The proposed mechanism for dipyrone removal involves hydrogen bonds, π bonds and electron donor-acceptor complex.Conclusions: The results are promising in comparison with recent literature and solve two environmental problems: biomass bottom ash disposal and pharmaceutical removal in aqueous medium. The ash may be regarded as a low-cost and environmentally friendly adsorbent.

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“…Sorption trends can be regulated by various pollutants transfer mechanisms from the solutions to the biosorbent. Hence, the resulting circumstances involved for metal retentions to occur like the metal diffusions from the solutions to the biosorbent surface contact area, surface diffusions to the pores and metal complexations, physicochemical sorptions, or chemisorptions are established by kinetic models [85]. To ascertain the optimum operation conditions, which is critical for a full-scale batch procedure, the kinetics of the biosorption of Cu(II) ions onto SD, SSD, and SDA were explored using the pseudo-first-order (PFO) model, pseudo-second-order (PSO) model, film diffusion (FD), and intraparticle diffusion (IPD).…”

Section: Biosorption Kineticsmentioning

confidence: 99%

Copper(II) ion removal by chemically and physically modified sawdust biochar

Eleryan

Aigbe

Ukhurebor

et al. 2022

Biomass Conv. Bioref.

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The difference between physical activations (by sonications) and chemical activations (by ammonia) on sawdust biochar has been investigated in this study by comparing the removal of Cu(II) ions from an aqueous medium by adsorption on sawdust biochar (SD), sonicated sawdust biochar (SSD), and ammonia-modified sawdust biochar (SDA) with stirring at room temperature, pH value of 5.5–6.0, and 200 rpm. The biochar was prepared by the dehydrations of wood sawdust by reflux with sulfuric acid, and the biochar formed has been activated physically by sonications and chemically by ammonia solutions and then characterized by the Fourier transform infrared (FTIR); Brunauer, Emmett, and Teller (BET); scanning electron microscope (SEM); thermal gravimetric analysis (TGA); and energy-dispersive spectroscopy (EDX) analyses. The removal of Cu(II) ions involves 100 mL of sample volume and initial Cu(II) ion concentrations (conc) 50, 75, 100, 125, 150, 175, and 200 mg L−1 and the biochar doses of 100, 150, 200, 250, and 300 mg. The maximum removal percentage of Cu(II) ions was 95.56, 96.67, and 98.33% for SD, SSD, and SDA biochars, respectively, for 50 mg L−1 Cu(II) ion initial conc and 1.0 g L−1 adsorbent dose. The correlation coefficient (R2) was used to confirm the data obtained from the isotherm models. The Langmuir isotherm model was best fitted to the experimental data of SD, SSD, and SDA. The maximum adsorption capacities (Qm) of SD, SSD, and SDA are 91.74, 112.36, and 133.33 mg g−1, respectively. The degree of fitting using the non-linear isotherm models was in the sequence of Langmuir (LNR) (ideal fit) > Freundlich (FRH) > Temkin (SD and SSD) and FRH (ideal fit) > LNR > Temkin (SDA). LNR and FRH ideally described the biosorption of Cu(II) ions to SD and SSD and SDA owing to the low values of χ2 and R2 obtained using the non-linear isotherm models. The adsorption rate was well-ordered by the pseudo-second-order (PSO) rate models. Finally, chemically modified biochar with ammonia solutions (SDA) enhances the Cu(II) ions’ adsorption efficiency more than physical activations by sonications (SSD). Response surface methodology (RSM) optimization analysis was studied for the removal of Cu(II) ions using SD, SSD, and SDA biochars.

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Potential Use of Residual Sawdust of Eucalyptus globulus Labill in Pb (II) Adsorption: Modelling of the Kinetics and Equilibrium

Cited by 13 publications

References 53 publications

Powdered and beaded sawdust materials modified iron (III) oxide-hydroxide for adsorption of lead (II) ion and reactive blue 4 dye

Powdered and beaded sawdust materials modified iron (III) oxide-hydroxide for adsorption of lead (II) ion and reactive blue 4 dye

Valorization of biomass ash for the effective removal of dipyrone from water: an efficient and low‐cost option

Copper(II) ion removal by chemically and physically modified sawdust biochar

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