Evaluation of the adsorption process using activated bone char functionalized with magnetite nanoparticles

Melo, Noemi H. de; Ferreira, Maria Eugênia de Oliveira; Neto, Eliseu Macedo Silva; Martins, Paulo Roberto; Ostroski, Indianara Conceição

doi:10.1016/j.enmm.2018.10.005

Cited by 13 publications

(7 citation statements)

References 41 publications

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“…The removal efficiencies were calculated by Equation (1) after the adsorption process shown in Figure 5. PSR biomass reported high removal efficiencies (>80%) for the removal of Cr (VI) and Ni (II) ions, which can be attributed to the high surface area and small pore size enhancing adsorption properties of such materials [62], consistent with the EDS after the adsorption process reported in Figures 4 and 5, as well as the irregular morphologies evidenced in the SEM micrographs, which is a desirable characteristic of adsorbents due to the availability of active sites for adsorbing heavy metal ions [63].…”

Section: Adsorption Efficiency In Batch Systemsupporting

confidence: 74%

Batch and Packed Bed Column Study for the Removal of Cr (VI) and Ni (II) Using Agro-Industrial Wastes

2021

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The objective of this study was to prepare bio adsorbents from agro-industrial wastes from yam starch (YSR) and plantain (PSR) production for its use in the removal of Cr (VI) and Ni (II) in aqueous solution in batch and continuous packed-bed column systems. Bromatological analysis showed that the biomaterials are rich in cellulose, lignin, hemicellulose, and SEM micrographs that evidence a mesoporous structure characteristic of materials of lignocellulosic origin. FTIR evidenced functional groups such as hydroxyl, carbonyl, and methyl, possibly involved in the uptake of metal ions. EDS and FTIR analysis after adsorption confirmed that the retention of the metals on the surface of the adsorbent materials was successful. Cr (VI) and Ni (II) removal efficiencies above 80% were achieved using YSR and PSR in batch systems at the different conditions evaluated. The optimum conditions for removing Ni (II) on PSR were a bed height of 11.4 cm and a temperature of 33 °C, while for YSR, they were: 43 °C and 9 cm for temperature and bed height respectively. The variable with the most significant influence on the removal of Cr (VI) in a batch system on the two bio adsorbents was temperature. In contrast, the adsorbent dose and temperature are relevant factors for PSR Ni (II) removal. Therefore, the residues from the preparation of yam and plantain starch have high potential for removing heavy metals from wastewater and are presented as an alternative for their final disposal.

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Section: Adsorption Efficiency In Batch Systemsupporting

confidence: 74%

Batch and Packed Bed Column Study for the Removal of Cr (VI) and Ni (II) Using Agro-Industrial Wastes

2021

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“…The empirically derived Freundlich isotherm model, determined with Eqn (4), is applied to multilayer adsorption, with nonuniform distribution of adsorption and affinity over the heterogeneous surface. The Freundlich model shows that the ratio of pollutant removed by the adsorbent is a function of the equilibrium liquid phase solute concentration, describing a nonideal and reversible process:

q_{e} bold= \frac{x}{m} bold= bold-italicK {bold-italicc}_{bolde}^{\frac{bold1}{bold-italicn}}

where K (L g −1 ) and n represent the Freundlich isotherm constants, the Freundlich coefficient K is an indicator of adsorption capacity, 1/ n indicates the adsorption intensity and n represents the affinity factor for the Freundlich model.…”

Section: Methodsmentioning

confidence: 99%

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

Poblete

Cortés

Bakit

et al. 2020

J of Chemical Tech & Biotech

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This study focuses on the removal of organic pollutants present in landfill leachate (LL) using an adsorption process with activated carbon (AC) obtained from fish scales, and subsequently evaluates the reduction of toxicity in the wastewater obtained from the process. The AC obtained is a mesoporous material, with a cumulative pore area of 1.57 m2 g−1, Brunauer–Emmett–Teller (BET) of 1.8329 m2 g−1 and adsorption average pore width of 12.79833 nm. The maximum removal of pollutants was achieved at natural pH (6.71) of the LL, with a load of 3 g L−1, resulting in 60.1% colour and 37.3% chemical oxygen demand (COD). The rate of COD removal per g of AC increase had a maximum value of 5.6 at pH 10 when passing from 0.5 to 1 g AC. The lowest rate of 0.6 occurred for the same pH when it passed from 1 to 2 g AC. At pH 3 the second lowest rate of 3.3 was observed when passing from 2 to 3 g AC. At pH 3 there was always an increase in the rate as more AC was added. Conversely, at natural pH 6.71 the rate tended to decrease. At pH 10 the rate first decreased and then increased. At acidic pH, because it is the one with the lowest COD removal, it would be expected that by adding more AC the rate would continue to increase as there are easily accessible sites still available. Langmuir isotherms fitted adequately with the experimental data, providing an R2 of 0.9657, which is consistent with a monolayer adsorption pattern. The LL before the adsorption process had an inhibition ratio of 20.4%, due to the fact that leachate can be toxic because of the presence of hazardous organic compounds. After adsorption processes at pH 6.71, the inhibition ratios were 16.9%, 13.8%, 12.2% and 10.9% at AC loads of 0.5, 1, 2 and 3 g L−1, respectively, due to decreasing COD and colour of the LL over the course of the treatment. It was observed that the reduction of the inhibition ratio was greater at higher loads of adsorbent. © 2020 Society of Chemical Industry

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“…An Extended signal between intervals of 2θ between 18°-25° was observed in the diffractograms of OPB, indicating the presence of amorphous carbon [31][32], the presence of a peak at 2θ = 43.25° confirm also the presence of certain degree of graphitic carbon [33][34]. In addition, the XRD patterns displayed other peaks at 2θ = 25°, 32°, 39°, and 48° which can be attributed to the presence of hydroxyapatite in the biochar (ICDD-PDF No 00-001-1008) [24]. On the other hand, the appearance of some peaks at 2θ = 30°, 35°, 37° can be attributed to the presence of SiO2 and alkali salts such as CaCO3 [35][36].…”

Section: Results and Discussion 1) Characterization Of Opb And Opb/fe3o4mentioning

confidence: 97%

“…Magnetization of biochar has been proposed by different researchers to solve this problem [18][19][20][21][22]; this modification allows the separation of biochar easily using a permanent magnet. The modification of the adsorbents with nanoparticles of magnetite (Fe3O4) is the most frequent and the most important due to their low cost, ease of synthesis, and good chemical and magnetic properties of the magnetite [23][24][25][26].…”

Section: Applied Environmental Researchmentioning

confidence: 99%

Magnetization of a Biochar Derived from Orange Peel and Its Application for the Removal of Crystal Violet

et al. 2022

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In this work, biochar synthesized from orange peel modified with magnetite was used as an alternative magnetic adsorbent for dye removal. The magnetization of the synthesized biochar was done using the co-precipitation method. The obtained composite was characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), and Raman spectroscopy. The efficiency of magnetized biochar (OPB/Fe3O4) was studied in the process of removing crystal violet (CV) from an aqueous solution at different temperatures. The experimental data obtained for the kinetic studies were better fitted to the pseudo-second-order model, and the isotherms data were well fitted to the Langmuir model. The results showed that the adsorption capacity increases with increasing temperature, reaching 113 mg g-1 at 50 °C. Thermodynamic parameters (ΔG0, ΔH0, ΔS0) were also calculated; their values showed that the adsorption was spontaneous and endothermic. These results inspire us to use other similar materials to solve the problem of water and environmental pollution.

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Evaluation of the adsorption process using activated bone char functionalized with magnetite nanoparticles

Cited by 13 publications

References 41 publications

Batch and Packed Bed Column Study for the Removal of Cr (VI) and Ni (II) Using Agro-Industrial Wastes

Batch and Packed Bed Column Study for the Removal of Cr (VI) and Ni (II) Using Agro-Industrial Wastes

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

Magnetization of a Biochar Derived from Orange Peel and Its Application for the Removal of Crystal Violet

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