Magnetic valorization of biomass and biochar of a typical plant nuisance for toxic metals contaminated water treatment

Mohubedu, Rebone P.; Diagboya, Paul N.; Abasi, Cyprian Y.; Dikio, Ezekiel Dixon; Mtunzi, Fanyana M.

doi:10.1016/j.jclepro.2018.10.215

Cited by 89 publications

(30 citation statements)

References 25 publications

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“…Experimental data were analyzed using the aforementioned two-parameter isotherm models, which were optimized using analysis of the average relative error (are), average percentage error (APE %), sum squares error (ERRSQ/SSE), sum of absolute error (EABS), and the coefficient of determination (R 2 ). Figure 5c shows the comparison between experimental and theoretical data of the two parameter isotherm models used in this study, Table 2 shows that the MMCC produced within the present work has a high affinity for the removal of Pb(II) ions (1155 mg/g) from solution when compared with modified Ratama raetam (270.27 mg/g) and other various adsorbents previously reported in the literature [45][46][47][48][49][50][51].…”

Section: Error Analysismentioning

confidence: 68%

Adsorption of Pb(II) ions from contaminated water by 1,2,3,4-butanetetracarboxylic acid-modified microcrystalline cellulose: Isotherms, kinetics, and thermodynamic studies

Hashem

Fletcher

Younis

et al. 2020

International Journal of Biological Macromolecules

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Microcrystalline cellulose (MCC) has been utilized as an adsorbent material for the removal of Pb(II) ions from aqueous solution after treatment with 1,2,3,4-butanetetracarboxylic acid (BTCA) at elevated temperature to obtain MMCC. The resulting adsorbent was characterized for point of zero point charge (pHZPC), estimation of carboxyl content, fourier transform infrared spectroscopy (FT-IR), scan electron microscopy (SEM), and textural properties, including surface area, and subsequently utilized for the removal of Pb(II) ions from aqueous solution. The adsorption process was probed by investigating the effect of adsorbent dose, pH of solution, temperature, agitation time, and Pb(II) ion concentration. The results showed successful functionalization of MCC using BTCA, which significantly improved the binding properties of the adsorbent towards Pb(II) ions. Isothermal adsorption data was analyzed using Langmuir, Freundlich and Temkin models, evaluated via nonlinear regression analysis. The maximum adsorption capacity was found to be 1155 mg/g (at pH 5 and 30 °C) from Langmuir theory, and appears independent of surface area. The Freundlich model was found to provide the best fit and the constant n was determined to be 2.69, indicating that adsorption of Pb(II) ions onto MMCC is favorable. Kinetic modelling showed good agreement for the pseudo-second order kinetic model, supporting the theory that chemisorption is involved in the adsorption process, which is promoted by a high density of active sites. Thermodynamic analysis showed that the adsorption of Pb(II) ions onto MMCC was endothermic and nonspontaneous; hence, MMCC offers an effective method of Pb(II) ion removal from aqueous solutions, with potential for water remediation processes.

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Section: Error Analysismentioning

confidence: 68%

Adsorption of Pb(II) ions from contaminated water by 1,2,3,4-butanetetracarboxylic acid-modified microcrystalline cellulose: Isotherms, kinetics, and thermodynamic studies

Hashem

Fletcher

Younis

et al. 2020

International Journal of Biological Macromolecules

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“…Also, there was an increase in the negativity of ΔG° for both STpe and STpe-AgNP when solution temperature increased from 300 to 323 K, indicating that higher temperature enhances BB uptake onto the adsorbents 86 . Increasing disorderliness at the solution-adsorbent interface during sequestration of BB onto STpe and STpe-AgNP was inferred by positive ΔS° entropy values 87 . The increase in removal of BB with increasing temperature discussed previously was supported by the positive ΔH° values found, which are ascribed to an endothermic adsorption.…”

Section: Thermodynamic Evaluation Of Bb Adsorption Adsorption Thermomentioning

confidence: 99%

Biogenic and chemically synthesized Solanum tuberosum peel–silver nanoparticle hybrid for the ultrasonic aided adsorption of bromophenol blue dye

Akpomie

Conradie

2020

Sci Rep

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This work was aimed at the synthesis of a hybrid (STpe-AgNP), obtained by impregnation of silver nanoparticles (AgNP) onto Solanum tuberosum peel (STpe), for the ultrasonic assisted adsorption of bromophenol blue (BB) dye. SEM, FTIR, XRD, EDX, TGA and BET techniques were used to characterize the adsorbents. The XRD, SEM and EDX confirmed successful impregnation of AgNPs onto STpe to form the hybrid. The AgNPs impregnated onto the hybrid were found to be water stable at various pH values of 2.0–9.0. Chi-square (χ2 < 0.024) and linear regression (R2 > 0.996) showed that the Freundlich model was best fitted among the isotherm models, corroborated by the oriented site model. Kinetic analysis conformed to the intraparticle diffusion and pseudo-first-order rate equations, while thermodynamics displayed a physical, spontaneous and endothermic adsorption process. The presence of competing Pb(II), Ni(II), Cd(II) and Zn(II) metal ions in solution interfered with the adsorption of BB onto the biosorbents. In terms of reusability, STpe and STpe-AgNP showed BB desorption of 91.3% and 88.5% respectively, using NaOH as eluent. Ultra-sonication significantly enhanced the adsorption of BB by both adsorbents, but the impregnation of AgNPs only slightly improved adsorption of the dye from the simulated wastewater. This study also illustrated that pristine STpe biomass waste is a cheap viable option for the decontamination of BB from water.

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“…The physical and chemical properties of the mPSBA composite were assessed through various characterizations reported in Figures and (and Figures S1 and S2). The infrared spectra (Figure a) of the MNPs showed notably the typical Fe–O band at 546 cm –1 (Figure S1). This band was absent in SBA-15-NH (Figure S2) but was slightly shifted to 560 cm –1 in mPSBA.…”

Section: Resultsmentioning

confidence: 99%

“…In this study, we further explore this technique by using poly(amidoamine) (PAMAM) dendrimers as a functional active material to enhance the adsorption properties of pristine SBA-15. The PAMAM dendrimers are units of repetitive amide and amine functional groups, which make it a potential candidate to enhance most contaminant adsorption processes. , Another functional component that may be useful in advanced materials is the addition of magnetic nanomaterials to enhance both the adsorption process as well as the separation process of the adsorbent from water after the adsorption process. , In this light, Fe oxide magnetic nanoparticles were synthesized and incorporated into the PAMAM-tailored SBA-15.…”

Section: Introductionmentioning

confidence: 99%

Metals and Antibiotics as Aqueous Sequestration Targets for Magnetic Polyamidoamine-Grafted SBA-15

et al. 2021

Self Cite

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In this study, a magnetic generation-5 polyamidoamine (G-5 PAMAM) dendrimer-functionalized SBA-15 (mPSBA) composite was synthesized by coupling amine-functionalized silica (SBA-15-NH 2 ) and amine-functionalized magnetic nanoparticles (MNP-NH 2 ) with the G-5 PAMAM, before characterization and aqueous sorption of As(III), Cd(II), tetracycline, and ciprofloxacin using the composite. The mPSBA characterization data exhibited the typical Si−O−Si infrared peaks from the SBA-15 backbone in addition to the acquired characteristic infrared Fe−O and amide-I/II peaks from the MNP and G-5 PAMAM dendrimers, respectively. Postsorption infrared spectra showing shifts for the amide-linked groups indicated the likely points of contaminant attachment on the composite. Its thermal stability was lower than that of SBA-15 but higher than that of SBA-15-NH, while the XRD diffractograms of the backbone SBA-15-NH and MNP were unchanged in the final composite. The mPSBA composite was a better As(III) and Cd(II) adsorbent than SBA-15 by ≈400 and 140%, respectively, with rapid uptake in the first 60 min and equilibrium achieved at 120 min. Sorption was enhanced with increasing pH (until pHpzc) and initial contaminant concentration. The process was spontaneous and endothermic; thus, increasing ambient temperature enhanced Cd(II) sorption. The sorption data fitted better to the homogeneous fractal pseudo-second-order (FPSO) kinetics model and the Brouers−Sotolongo fractal adsorption isotherm models, indicating complex sorption interactions and pore-filling/contaminant trapping within mPSBA. Further experiments using mPSBA for the uptake of tetracycline and ciprofloxacin showed 679% and 325% higher sorption, respectively, compared with that for SBA-15-NH. In addition to the added advantage of easy removal from solution/treated water after the adsorption process, mPSBA sorption capacities for these studied contaminants [As(III): 23.3 mg/g; Cd(II): 74.5 mg/g; tetracycline: 38.4 mg/g; ciprofloxacin: 23.0 mg/g] are better than those of several advanced adsorbents reported in the literature.

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Magnetic valorization of biomass and biochar of a typical plant nuisance for toxic metals contaminated water treatment

Cited by 89 publications

References 25 publications

Adsorption of Pb(II) ions from contaminated water by 1,2,3,4-butanetetracarboxylic acid-modified microcrystalline cellulose: Isotherms, kinetics, and thermodynamic studies

Adsorption of Pb(II) ions from contaminated water by 1,2,3,4-butanetetracarboxylic acid-modified microcrystalline cellulose: Isotherms, kinetics, and thermodynamic studies

Biogenic and chemically synthesized Solanum tuberosum peel–silver nanoparticle hybrid for the ultrasonic aided adsorption of bromophenol blue dye

Metals and Antibiotics as Aqueous Sequestration Targets for Magnetic Polyamidoamine-Grafted SBA-15

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