Adsorption of levofloxacin onto an iron-pillared montmorillonite (clay mineral): Kinetics, equilibrium and mechanism

Liu, Yanan; Dong, Chengxing; Hong, Wei; Yuan, Wenhua; Li, Kebin

doi:10.1016/j.clay.2015.10.010

Cited by 106 publications

(27 citation statements)

References 49 publications

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“…KSF-Na diffraction patterns (Figure 1ii-a) presented characteristic reflection at 2θ = 6.29º, which was associated to the basal spacing (d 001 ) of 1.40 nm. Although the basal space has been reached a higher value than observed for montmorillonite around 1.2 nm [67][68][69], the same value was previously found [47,70,71], the higher value can be related to the acid treatment of raw KSF and the sodium exchange. Other characteristic peaks of montmorillonite occurred at 2θ ≅ 20 (d 020 = 0.45 nm) and 35 (d 006 = 0.26 nm).…”

Section: Characterization Of Chitosan-ksf Hybridssupporting

confidence: 68%

Green biosorbents based on chitosan-montmorillonite beads for anionic dye removal

Pereira

Sousa

Cavalcanti

et al. 2017

Journal of Environmental Chemical Engineering

103

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Highlights Chitosan-montmorillonite beads composites were synthesized  The key parameters that control the adsorption were determined  Clay mineral stabilized chitosan in acidic medium  Composites removed anionic dyes in acidic medium  The dye adsorption mechanism was understood via spectroscopic characterization Abstract Chitosan/KSF-montmorillonite beads were prepared at 1-25% w/w ratios by reaction of the biopolymer and the clay mineral with sodium tripolyphosphate as crosslinking agent. The synthesized biocomposites were characterized by CHN elemental analysis, XRD (X-Ray diffraction), FTIR (Fourier transform infrared), 13 C NMR (Nuclear magnetic resonance), thermogravimetry, SEM (Scanning electron microscopy), TEM (Transmission electron microscopy) and measurements of point of zero charge (pH pzc ).The results suggested that hybrid materials were properly obtained and also their properties were improved compared to the pristine chitosan and montmorillonite.Further, the beads were evaluated in the adsorption of Remazol Blue under batch operations obtained for different conditions at pH (2-8), contact time (0-660 min) and dye concentration (100-1600 mg L -1 ). Kinetic and equilibrium sorption parameters were evaluated using pseudo-first and pseudo-second rate models and Langmuir and Freundlich equations. The results were promising and suggested that the sorbents can be applied for removing anionic dyes from wastewater even in acidic medium.

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Section: Characterization Of Chitosan-ksf Hybridssupporting

confidence: 68%

Green biosorbents based on chitosan-montmorillonite beads for anionic dye removal

Pereira

Sousa

Cavalcanti

et al. 2017

Journal of Environmental Chemical Engineering

103

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“…The adsorption data fitted well into the pseudo-second-order kinetic models thus indicating that uptake of RhB onto ARH may be chemical in nature. 55 Pseudo-firstorder and Avrami kinetics models are not suitable for the RhB-ARH adsorption system. Elovich model is known to best describe a chemisorption adsorption mechanism system.…”

Section: Adsorption Kinetics Studiesmentioning

confidence: 99%

Liquid Phase Adsorption of Rhodamine B Dye onto Acid-treated Raphia hookeri Fruit Epicarp: Isotherms, Kinetics and Thermodynamics Studies

Inyinbor¹,

Adekola²,

Olatunji³

2016

S.Afr.j.chem.

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Novel adsorbent was prepared from the waste of Raphia hookeri fruit via acid treatments (ARH). The Brunauer-Emmett-Teller (BET) surface area of ARH was obtained to be 1.86 m 2 g-1. Large surface pores evidently exposed by the scanning electron microscopic studies characterized ARH. Active surface functional groups were also revealed by the infrared spectroscopic studies. These characteristics resulted in ARH effectiveness in Rhodamine B (RhB) dye removal, with 98.46 % dye removal from 50 mg L-1 RhB solution. Maximum adsorption was obtained at pH of 3. Equilibrium adsorption data fitted best into the Langmuir adsorption isotherm, with maximum monolayer adsorption capacity of 166.67 mg g-1. Pseudo-second-order kinetics best describe the RhB-ARH adsorption kinetic data. Energy of adsorption obtained from the D-R model was greater than 8 kJ mol-1 , suggesting that the uptake of RhB onto ARH was chemical in nature. Desorption efficiency followed the order CH 3 COOH > HCl > H 2 O with highest desorption percentage of 36.36 %.

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“…Animals and humans could absorb excess environmental antibiotics through the water and food chains, resulting in antibiotic resistance. 4,5 On the other hand, the conventional biological wastewater treatment was not appropriate for antibiotic removal, due to their toxic effects on microorganisms. 4 Consequently, cost-effective approaches for LEV and TC removal from wastewater are urgently needed.…”

Section: Introductionmentioning

confidence: 99%

Antibiotic removal by agricultural waste biochars with different forms of iron oxide

Chen

Shi

et al. 2019

RSC Adv.

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Adsorption of levofloxacin onto an iron-pillared montmorillonite (clay mineral): Kinetics, equilibrium and mechanism

Cited by 106 publications

References 49 publications

Green biosorbents based on chitosan-montmorillonite beads for anionic dye removal

Green biosorbents based on chitosan-montmorillonite beads for anionic dye removal

Liquid Phase Adsorption of Rhodamine B Dye onto Acid-treated Raphia hookeri Fruit Epicarp: Isotherms, Kinetics and Thermodynamics Studies

Antibiotic removal by agricultural waste biochars with different forms of iron oxide

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