Fabrication of sulfur-doped biochar derived from tapioca peel waste with superior adsorption performance for the removal of Malachite green and Rhodamine B dyes

Vigneshwaran, Sivakumar; Sirajudheen, P.; Karthikeyan, Perumal; Meenakshi, Sankaran

doi:10.1016/j.surfin.2020.100920

Cited by 106 publications

(29 citation statements)

References 31 publications

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“…From Figure 5, it was clear that the adsorption process of both dyes onto S-Fe NCs was through two main stages: the fast initial stage and the slower stage leading to equilibrium. This represents a typical process of adsorption, as available active sites decrease as time goes on and the adsorption reaches the maximum values (Vigneshwaran et al 2021). Another phenomenon could also be observed from the diagram that the adsorption capacity increased with increasing initial concentration, indicating a larger concentration gradient could be used to overcome the resistance to mass transfer during adsorption process.…”

Section: Adsorption Kinetic Studiesmentioning

confidence: 76%

Green sulfidated iron oxide nanocomposites for efficient removal of Malachite Green and Rhodamine B from aqueous solution

Guo

Zhang

Song³

et al. 2022

Water Science and Technology

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A green and facile pathway was described using Viburnum odoratissimum leaf extract in the presence of sodium thiosulfate for the synthesis of sulfidated iron oxide nanocomposites (S-Fe NCs) adsorbents. The prepared S-Fe NCs can be used for the efficient removal of Malachite Green (MG) and Rhodamine B (RhB) from aqueous solution. Analytical techniques by Scanning electron microscopy (SEM), Energy dispersive X-ray spectroscopy (EDS), Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transformed infrared (FTIR), and X-ray photoelectron spectroscopy (XPS) were applied to understand the morphologies and compositions of S-Fe NCs. The stability of the adsorption capacity on S-Fe NCs was studied. Results from the characterization studies showed that S-Fe NCs was mainly composed of iron oxides, iron sulfides and biomolecules. The S-Fe NCs displayed high adsorption capacity for a wide range of pH values. The Koble-Corrigan isotherm model and Elovich model well described the adsorption process. The maximum adsorption capacity for MG and RhB were 4.31 mmol g−1 and 2.88 mmol g−1 at 303 K, respectively. The adsorption mechanism may be attributed to the electrostatic interaction, the hydrogen bonding, the π-π stacking interactions, the inner-sphere surface complexation or the cation bridging among the S-Fe NCs and dye molecules.

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Section: Adsorption Kinetic Studiesmentioning

confidence: 76%

Green sulfidated iron oxide nanocomposites for efficient removal of Malachite Green and Rhodamine B from aqueous solution

Guo

Zhang

Song³

et al. 2022

Water Science and Technology

View full text Add to dashboard Cite

show abstract

“…In a very similar investigation to the one above [ 54 ], the same adsorbent and dyes were used, though in this case [ 53 ], the dyes’ concentrations were 25 mg/L because the uptake was lower than in the previous reference, namely 30 mg/L versus 53 mg/g (malachite green) or 33 mg/g versus 41 mg/g (rhodamine B). Additionally, the best uptakes were yielded at a pH near 8 and after 120 min of reaction.…”

Section: Adsorbents For the Removal Of Cationic Dyes From Watersmentioning

confidence: 99%

Organic Dyes versus Adsorption Processing

López

2021

Molecules

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Even in the first quarter of the XXI century, the presence of organic dyes in wastewaters was a normal occurrence in a series of countries. As these compounds are toxic, their removal from these waters is a necessity. Among the separation technologies, adsorption processing appeared as one of the most widely used to reach this goal. The present work reviewed the most recent approaches (first half of the 2021 year) regarding the use of a variety of adsorbents in the removal of a variety of organic dyes of different natures.

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“…In a very similar investigation than above [71], the same adsorbent and dyes were used, though in this case [72], the dyes concentrations were 25 mg/L, and this is because dyes uptake were lower than in the previous reference, 30 mg/L versus 53 mg/g (malachite green) or 33 mg/g versus 41 mg/g (rhodamine B), also best uptakes were yielded at pH near 8 and after 120 min of reaction. The experimental data also followed the pseudosecond-order kineticmodel, but in this case, the adsorption fitted to the Freundlich isotherm instead of the Langmuir one.…”

Section: Table 6 Efficacy Of the Adsorbent After Cycles Of Adsorption-desorptionmentioning

confidence: 99%

Organic Dyes Versus Adsorption Processing

López

2021

Preprint

View full text Add to dashboard Cite

Even in the first quarter of XXI century, the presence of organic dyes in wastewaters is a normal occurrence in a series of countries, and being these compounds toxics, their removal from these waters is of a necessity. Among the separation technologies, adsorption processing appeared as one of the most widely used to reach this goal. The present work reviewed the most recent approaches (first half of 2021 year) about the use of a variety of adsorbents on the removal of, also, a variety of organic dyes of different nature.

show abstract

Fabrication of sulfur-doped biochar derived from tapioca peel waste with superior adsorption performance for the removal of Malachite green and Rhodamine B dyes

Cited by 106 publications

References 31 publications

Green sulfidated iron oxide nanocomposites for efficient removal of Malachite Green and Rhodamine B from aqueous solution

Green sulfidated iron oxide nanocomposites for efficient removal of Malachite Green and Rhodamine B from aqueous solution

Organic Dyes versus Adsorption Processing

Organic Dyes Versus Adsorption Processing

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