Elimination of crystal violet from aqueous solution by adsorption on naturel polysaccharide: Kinetic, isotherm, thermodynamic studies and mechanism analysis

Arabian Journal of Chemistry, Journal Year: 2023, Volume and Issue: 17(1), P. 105453 - 105453

Published: Nov. 11, 2023

The colored discharges from certain tanning industries into aquatic environments are too heavy with violet crystal; these have recently become a significant environmental problem. objective of this work is to find an effective method stop the propagation micropollutants in water. Although various treatment techniques been tested, they often ineffective treating micropollutants. This study focuses on optimizing parameters involved adsorption process crystal (CV) using crude chitin (RC). It was found that mass 0.08 g RC can effectively retain CV. Modeling experimental results indicated kinetics CV onto raw follows pseudo-second-order at temperatures studied, and intra-particle diffusion not only rate controlling step. After 80 minutes contact, saturation surface obtained. Freundlich model describes isotherms. adsorbed quantities increase when pH goes 4 12. thermodynamic showed spontaneous (ΔG° < 0) endothermic (ΔH° > 0). value pHpzc located = 8.4. Characterization by FTIR, XRD, DTA/TGA SEM/EDS before after contact shed light nature interactions between RC.

Language: Английский

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Hierarchically Porous Mg-MOF-74/Sodium Alginate Composite Aerogel for CO₂ Capture

ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 6(18), P. 16694 - 16701

Published: Sept. 5, 2023

One of the most promising methods for capturing carbon dioxide (CO2) is solid physical adsorption, which an efficient and simple technique. The key to effective CO2 capture development high-performance adsorbents with excellent adsorption capacity, CO2/N2 selectivity, rapid adsorption/desorption kinetics. In this paper, a Mg-MOF-74/sodium alginate composite aerogel was prepared by loading Mg-MOF-74 on sodium sheets followed directional freeze-drying. exhibited hierarchical porous structure, in provided open mesoporous/macroporous structure that promoted diffusion contact active center CO2. micropores/mesopores strong interaction between adsorbent micropore mass transfer through mesopores. experimental data showed MSA-6 achieved 2.461 mmol·g–1 at 298 K. Furthermore, selectivity reached 35.108, indicating its selective potential.

Language: Английский

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Ultrasound-assisted adsorption of organic dyes in real water samples using zirconium (IV)-based metal-organic frameworks UiO-66-NH2 as an adsorbent

Heliyon, Journal Year: 2023, Volume and Issue: 9(11), P. e22001 - e22001

Published: Nov. 1, 2023

The utilization of dye adsorption through metal-organic frameworks represents an eco-friendly and highly effective approach in real water treatment. Here, ultrasound assisted was employed for the remediation three dyes including methylene blue (MB), malachite green (MG), congo red (CR) from samples using zirconium(IV)-based adsorbent (UiO-66-NH2). characterized structural, elemental, thermal morphological features XRD, XPS, FTIR, thermogravimetric analysis, SEM, BET , Raman spectroscopy. capacity to uptake pollutants aqueous solutions investigated under different experimental conditions such as amount UiO-66-NH2 at various contact durations, temperatures, pH levels, initial loading amounts. maximum removal optimal found be 938, 587, 623 mg g-1 towardMB, MG, CR, respectively. studied on surface a monolayer endothermic process. probable mechanism chemisorption follows pseudo-second-order kinetics. From findings regeneration studies, it deduced that can effectively used consecutive cycles without any momentous loss its efficacy. Furthermore, with ultrasound-assisted might help safeguard environment develop new strategies sustainability natural resources.

Language: Английский

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Recent Advancements in Metallic Au- and Ag-Based Chitosan Nanocomposite Derivatives for Enhanced Anticancer Drug Delivery

Molecules, Journal Year: 2024, Volume and Issue: 29(10), P. 2393 - 2393

Published: May 19, 2024

The rapid advancements in nanotechnology the field of nanomedicine have potential to significantly enhance therapeutic strategies for cancer treatment. There is considerable promise enhancing efficacy therapy through manufacture innovative nanocomposite materials. Metallic nanoparticles been found release anticancer medications that are loaded onto them, resulting a sustained release, hence reducing dosage required drug administration and preventing their buildup healthy cells. combination with biocompatible materials offers new prospects development advanced therapies exhibit enhanced selectivity, reduced adverse effects, improved patient outcomes. Chitosan (CS), polysaccharide possessing distinct physicochemical properties, exhibits favorable attributes controlled delivery due its biocompatibility biodegradability. nanocomposites heightened stability, biocompatibility, prolonged characteristics medicines. incorporation gold (Au) into chitosan results manifestation photothermal characteristics, whereas inclusion silver (Ag) boosts antibacterial capabilities synthesized nanocomposite. objective this review investigate recent progress utilization Ag Au nanoparticles, or thereof, within matrix modified derivatives purpose delivery. research findings deliver various drugs, such as doxorubicin, 5-Fluroacil, curcumin, paclitaxel, 6-mercaptopurine, were investigated. Moreover, modifications carried out on phase surfaces targeting loading efficiency, pH sensitivity highlighted. In addition, challenges perspectives could motivate further related applications summarized.

Language: Английский

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Construction of C8/threonine-functionalized mesoporous silica aerogel based on mixed-mode and its adsorption properties for both anionic and cationic dyes

Powder Technology, Journal Year: 2024, Volume and Issue: 434, P. 119360 - 119360

Published: Jan. 5, 2024

Language: Английский

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Efficient Electron Transfer across Strontium Titanate Decorated Graphene Oxide for High‐Performance Dye‐Sensitized Solar Cells and Photocatalytic Degradation of Dye and Antibiotic

ChemistrySelect, Journal Year: 2024, Volume and Issue: 9(5)

Published: Feb. 2, 2024

Abstract Understanding synergistic interface features is a crucial step towards adjustable and controllable interfaces for photocatalytic photovoltaic devices. In this work, novel layer‐structured rGO hybrid with SrTiO 3 (STO/rGO) based binary composite has developed via hydrothermal method. The highly stable STO/rGO used to construct dual‐functional platform dye, antibiotic degradation DSSC. activities of composites were examined using Methylene Blue (MB) Tetracycline (TC) in an aqueous solution under white light irradiation. catalyst containing STG‐3 exhibited outstanding efficiency 93.06 % 95.23 toward MB TC, respectively. addition, the composites‐based photoanode had most 3.74 increase J SC . performance far better than pristine STO. improved ascribed strong interconnectivity, excellent crystallinity, higher surface area high porosity, which results reduced interfacial charge recombination loss, dye adsorption electron transport. Furthermore, predicted mechanism provided explain composites.

Language: Английский

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Sequestration of Pb(II) using channel-like porous spheres of carboxylated graphene oxide-incorporated cellulose acetate@iminodiacetic acid: optimization and mechanism study

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(22), P. 32664 - 32679

Published: April 25, 2024

The adsorption property of the costless green cellulose acetate (CA) was boosted by dual modifications: inner modification incorporating carboxylated graphene oxide (COOH-GO) into CA spheres and outer surface COOH-GO@CA iminodiacetic acid (IDA) for removing Pb(II). experiments Pb(II) proceeded in a batch mode to evaluate COOH-GO@CA@IDA spheres. maximal capacity attained 613.30 mg/g within 90 min at pH = 5. removal reached its equilibrium 20 min, % almost 100% after 30 low concentration. mechanism proposed according kinetics isotherms studies; addition, zeta potential (ZP) measurements X-ray Photoelectron Spectroscopy (XPS) analysis defined pathways. By comparing XPS spectra authentic used COOH-GO@CA@IDA, it deduced that contributed chemical pathways are Lewis acid-base, precipitation, complexation. demonstrated electrostatic interaction participation adsorbing cationic species onto negatively charged (ZP 14.2 mV 5). unique channel-like pores suggested pore-filling promising results superb recyclability character enable extend bench scale industrial scale.

Language: Английский

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Dandelion-like Cu-Ni LDH-decorated biochar/aminated chitosan composite for boosting Fenton-like degradation of doxycycline: Insights into performance and mechanism

Journal of Molecular Liquids, Journal Year: 2023, Volume and Issue: 394, P. 123716 - 123716

Published: Dec. 9, 2023

Language: Английский

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Enhanced Redox Cycle of Rod-Shaped MIL-88A/SnFe2O4@MXene Sheets for Fenton-like Degradation of Congo Red: Optimization and Mechanism

Nanomaterials, Journal Year: 2023, Volume and Issue: 14(1), P. 54 - 54

Published: Dec. 24, 2023

This study intended to fabricate a novel Fenton-like catalyst by supporting the rod-like MIL-88A and magnetic tin ferrite nanoparticles (SnFe2O4) on MXene sheets (MIL-88A/SnFe2O4@MXene). The well fabrication determination of MIL-88A/SnFe2O4@MXene properties were investigated using SEM, XPS, VSM, Zeta potential, XRD, FTIR tools. degradation reaction CR was thoroughly studied identify optimal proportions components, impact H2O2 concentrations, as effect raising temperature pH medium catalytic system dosage. Kinetics studies executed analyze decomposition First-order Second-order models. Furthermore, mechanism proposed based scavenging test that proceeded in presence chloroform t-butanol, addition XPS analysis clarified participation containing metal species: Fe, Sn, Ti, formation continual redox cycle. obtained intermediates during defined GC–MS. A recyclability performed five runs molecules. Finally, could be recommended propitious heterogeneous with continuous cycle merit.

Language: Английский

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2D/3D MXene/NiFeMn-layered double hydroxide decorated gelatin for removal of Cr(VI) and Congo red: Performance and mechanism

Journal of Molecular Liquids, Journal Year: 2023, Volume and Issue: 396, P. 123889 - 123889

Published: Dec. 27, 2023

Language: Английский

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