Preparation of monolith-based adsorbent mingled with metal organic framework for field microextraction of organic pollutants with significantly distinct properties in water

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 137982 - 137982

Опубликована: Март 1, 2025

Язык: Английский

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Design and Characterization of Concave Hollow Double-Layer Nanospheres for Efficient Cd(II) and Pb(II) Adsorption

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 12, 2025

Polymer-based adsorbents have emerged as promising candidates for heavy-metal remediation due to their tailorable porosity and multifunctional surfaces, yet challenges persist in achieving both structural precision adsorption efficiency. Here, we report a concave hollow double-layer nanosphere (CHDN) synthesized through facile self-assembly strategy engineered selective capture of Cd(II) Pb(II) ions. Comprehensive characterization via transmission electron microscopy (TEM), scanning (SEM), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, thermogravimetric analysis (TGA) confirmed the hierarchical architecture with abundant amino/hydroxyl moieties. The CHDN demonstrated exceptional capacities 198.40 mg/g 60.34 Pb(II), outperforming conventional adsorbents. Isotherm revealed followed Sips model (R2 > 0.99), while adhered Langmuir model, suggesting monolayer heterogeneous binding mechanisms, respectively. Kinetic studies further corroborated chemisorption dominance pseudo-second-order fitting Elovich compatibility Pb(II). We propose synergistic mechanism involving ligand complexation ion exchange, facilitated by dual functionality surface groups advantages architecture. This work provides blueprint designing spatially polymers environmental remediation.

Язык: Английский

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Alfa Fiber‐Mesoporous Activated Carbon for Copper Ions Adsorption: Comparative Study, Kinetics, Isotherm and Thermodynamic Studies

ChemistrySelect, Год журнала: 2025, Номер 10(16)

Опубликована: Апрель 1, 2025

Abstract Alfa fiber is used as a low‐cost precursor for the production of activated carbon (ACAF) through chemical activation with zinc chloride at 500 °C. In this context, ACAF was applied to elimination Cu(II) from water and compared commercial (CAC). The porosity, structural, thermal stability were characterized by SEM, FTIR, BET, TGA analysis. surface oxygen functional groups analyzed using Boehm's titration. Batch experiments in stirred reactor performed study effect operating parameters on adsorption process: pH (2–6), temperature (25–55 °C), amount adsorbent (0.03–0.1 g). Isotherms models: Langmuir, Freundlich, Dubinin–Raduskevich tested. results revealed that had high area 1013 m 2 /g CAC adsorbent, 978.85 /g. isotherms kinetics onto both adsorbents can be described well Langmuir isotherm pseudo‐second‐order models. monolayer maximum capacity toward 41.666 21.276 mg/g 328 K, respectively. Thermodynamics indicated spontaneous endothermic. mechanism ions an electrostatic interaction.

Язык: Английский

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Zeolite-carbon composite synthesis and its adsorption property

Chemical Engineering Science, Год журнала: 2024, Номер 301, С. 120697 - 120697

Опубликована: Сен. 7, 2024

Язык: Английский

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Preparation of phenol-formaldehyde composite modified with chitosan for the simultaneous removal of antibiotics and heavy metal ions in waters

International Journal of Biological Macromolecules, Год журнала: 2024, Номер 281, С. 136467 - 136467

Опубликована: Окт. 18, 2024

Язык: Английский

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Upcycling waste biomass: Alkali-modified watermelon rind as a lignocellulosic bioadsorbent for copper ion removal

Industrial Crops and Products, Год журнала: 2024, Номер 224, С. 120340 - 120340

Опубликована: Дек. 24, 2024

Язык: Английский

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Functionalization of Na2Ca2Si3O9/Ca8Si5O18 Nanostructures with Chitosan and Terephthalaldehyde Crosslinked Chitosan for Effective Elimination of Pb(II) Ions from Aqueous Media

Inorganics, Год журнала: 2024, Номер 12(4), С. 113 - 113

Опубликована: Апрель 15, 2024

Lead poses significant health risks to humans, including neurological and developmental impairments, particularly in children. Additionally, lead pollution the environment can contaminate soil, water, air, endangering wildlife ecosystems. Therefore, this study reports straightforward fabrication of Na2Ca2Si3O9/Ca8Si5O18 nanostructures (NaCaSilicate) utilizing a sol-gel technique. produced underwent further modification with chitosan (CS@NaCaSilicate) crosslinked terephthalaldehyde (CCS@NaCaSilicate), resulting new nanocomposite materials. These samples were developed efficiently extract Pb(II) ions from aqueous media through complexation ion exchange mechanisms. Furthermore, maximum adsorption capacity for by NaCaSilicate, CS@NaCaSilicate, CCS@NaCaSilicate is 185.53, 245.70, 359.71 mg/g, respectively. The uptake was characterized as spontaneous, exothermic, chemical, best description provided Langmuir equilibrium isotherm pseudo-second-order kinetic model. 9 M hydrochloric acid solution effectively eliminated synthesized samples, attaining desorption efficacy surpassing 99%. fabricated exhibited efficient reusability across five successive cycles capturing ions.

Язык: Английский

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From inactive biomass in removing amoxicillin to new active chitosan-biomass composite adsorbents

Results in Engineering, Год журнала: 2024, Номер unknown, С. 103709 - 103709

Опубликована: Дек. 1, 2024

Язык: Английский

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Carboxymethyl Inulin Modified Chitosan Composites for Cu (II) Removal in Aqueous Solution: Synthesis, Influencing Factors and Adsorption Mechanism

Journal of Polymers and the Environment, Год журнала: 2024, Номер unknown

Опубликована: Сен. 3, 2024

Язык: Английский

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Innovative Metal−Phenolic Nanocomposite Sorbent: A Groundbreaking Solution for Arsenic-Free Drinking Water - Synthesis and Characterization Approaches

Desalination and Water Treatment, Год журнала: 2024, Номер 320, С. 100764 - 100764

Опубликована: Сен. 10, 2024

Язык: Английский

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