Magnetic diatomite for pesticide removal from aqueous solution via hydrophobic interactions

Erol, Kadir; Yıldız, Emrecan; Alacabey, İhsan; Karabörk, Muharrem; Uzun, Lokman

doi:10.1007/s11356-019-06423-0

Cited by 37 publications

(12 citation statements)

References 44 publications

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“…The pH study utilized experimental applications in the range of 3.0-9.0. Finally, adsorption experiments were conducted at three different temperatures (15,30,45 • C) and under predetermined optimum conditions.…”

Section: Adsorption Studiesmentioning

confidence: 99%

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Antibiotic Removal from the Aquatic Environment with Activated Carbon Produced from Pumpkin Seeds

Alacabey

2022

Molecules

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Antibiotics are among the most critical environmental pollutant drug groups. Adsorption is one of the methods used to eliminate these pollutants. In this study, activated carbon was produced from pumpkin seed shells and subsequently modified with KOH. The adsorbent obtained through this procedure was used to remove ciprofloxacin from aqueous systems. Fourier Transform-Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), elemental, X-ray Photoelectron Spectroscopy (XPS), Brunauer–Emmett–Teller (BET) and Zeta analyses were used to characterize the adsorbent. The surface area, in particular, was found to be a very remarkable value of 2730 m2/g. The conditions of the adsorption experiments were optimized based on interaction time, adsorbent amount, pH and temperature. Over 99% success was achieved in removal operations carried out under the most optimal conditions, with an absorption capacity of 884.9 mg·g−1. In addition, the Langmuir isotherm was determined to be the most suitable model for the adsorption interaction.

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Section: Adsorption Studiesmentioning

confidence: 99%

“…Correlation between the equilibrium data and the Langmuir-1 isotherm model was found to be high (R 2 ) (Table 3). The Langmuir model is based on the assumption of homogeneous adsorption energies to the surface and the absence of adsorbate transition in the surface plane [40,[43][44][45][46][47][48][49][50].…”

Section: Isotherm Studiesmentioning

confidence: 99%

Antibiotic Removal from the Aquatic Environment with Activated Carbon Produced from Pumpkin Seeds

Alacabey

2022

Molecules

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“…2 A). Typical literature value for this peak is around 580 cm −1 38 , 39 , however, this higher wavelength shift could be due to the polar environment of the KBr pellet 40 , for which our sample was not exposed. Other prominent bands from this sample included a broad peak around 3350 cm −1 and another at 1630 cm −1 corresponding to surface hydroxyl groups 38 , 40 .…”

Section: Resultsmentioning

confidence: 75%

Magnetic cryogels as a shape-selective and customizable platform for hyperthermia-mediated drug delivery

Perera

Jackson

Bristow

et al. 2022

Sci Rep

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Cryogels consisting of polyvinyl alcohol and iron (II, III) oxide magnetic nanoparticles coated with a model drug—acetaminophen, were developed as a tunable platform for thermally triggered drug release, based on shape-selective heat transfer. Two different shapes of cryogels; discs and spherical caps, were formed via adding polymer-nanoparticle-drug mixtures into 3D printed molds, followed by freeze-thawing five times. No additional chemical crosslinking agents were used for gel formation and the iron oxide nanoparticles were coated with acetaminophen using only citric acid as a hydrogen-bonding linker. The two gel shapes displayed varying levels of acetaminophen release within 42–50 °C, which are ideal temperatures for hyperthermia induced drug delivery. The amount and time of drug-release were shown to be tunable by changing the temperature of the medium and the shape of the gels, while keeping all other factors (ex. gel volume, surface area, polymer/nanoparticle concentrations and drug-loading) constant. The discs displayed higher drug release at all temperatures while being particularly effective at lower temperatures (42–46 °C), in contrast to the spherical caps, which were more effective at higher temperatures (48–50 °C). Magnetic hyperthermia-mediated thermal imaging and temperature profiling studies revealed starkly different heat transfer behavior from the two shapes of gels. The disc gels retained their structural integrity up to 51 °C, while the spherical caps were stable up to 59 °C, demonstrating shape-dependent robustness. The highly customizable physicochemical features, facile synthesis, biocompatibility and tunable drug release ability of these cryogels offer potential for their application as a low cost, safe and effective platform for hyperthermia-mediated drug delivery, for external applications such as wound care/muscle repair or internal applications such as melanoma treatment.

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“…Langmuir model specifically describes the homogeneous and monolayer adsorption on fixed adsorption sites (Kireç et al 2021). Freundlich model assumes the heterogeneous multilayer adsorption on different surface energies (Erol et al 2019a(Erol et al , 2019b Meanwhile, Temkin isotherm model describes that the heat of adsorption decreases with the adsorption coverage due to the adsorbent-adsorbate interactions (Bahrudin et al 2019). The non-linear expressions of Langmuir (Langmuir 1918), Freundlich (Freundlich 1906), and Temkin (Temkin 1940) isotherms are given in Equations ( 7)-( 9), respectively as follows:…”

Section: Isotherm Modelingmentioning

confidence: 99%

Microporous activated carbon developed from KOH activated biomass waste: surface mechanistic study of methylene blue dye adsorption

Jawad

Abdulhameed

Bahrudin

et al. 2021

Water Science and Technology

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In this work, sugarcane bagasse waste (SBW) was used as a lignocellulosic precursor to develop a high surface area activated carbon (AC) by thermal treatment of the SBW impregnated with KOH. This sugarcane bagasse waste activated carbon (SBWAC) was characterized by means of crystallinity, porosity, surface morphology and functional groups availability. The SBWAC exhibited Type I isotherm which corresponds to microporosity with high specific surface area of 709.3 m2/g and 6.6 nm of mean pore diameter. Further application of SBWAC as an adsorbent for methylene blue (MB) dye removal demonstrated that the adsorption process closely followed the pseudo-second order kinetic and Freundlich isotherm models. On the other hand, thermodynamic study revealed the endothermic nature and spontaneity of MB dye adsorption on SBWAC with high acquired adsorption capacity (136.5 mg/g). The MB dye adsorption onto SBWAC possibly involved electrostatic interaction, H-bonding and π-π interaction. This work demonstrates SBW as a potential lignocellulosic precursor to produce high surface area AC that can potentially remove more cationic dyes from the aqueous environment.

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Magnetic diatomite for pesticide removal from aqueous solution via hydrophobic interactions

Cited by 37 publications

References 44 publications

Antibiotic Removal from the Aquatic Environment with Activated Carbon Produced from Pumpkin Seeds

Antibiotic Removal from the Aquatic Environment with Activated Carbon Produced from Pumpkin Seeds

Magnetic cryogels as a shape-selective and customizable platform for hyperthermia-mediated drug delivery

Microporous activated carbon developed from KOH activated biomass waste: surface mechanistic study of methylene blue dye adsorption

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