One-step synthesis of iron-rich biochar for efficient hexavalent chromium removal: Adsorption-reduction performance, mechanism and column experiments

Journal of environmental chemical engineering, Год журнала: 2025, Номер 13(2), С. 115701 - 115701

Опубликована: Фев. 3, 2025

Язык: Английский

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A crystalline organic hybrid thiogallate containing high content of amino groups for efficient Cr(VI) removal

Chemical Engineering Journal, Год журнала: 2024, Номер 493, С. 152844 - 152844

Опубликована: Июнь 5, 2024

Язык: Английский

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Efficient removal of hexavalent chromium from wastewater using a novel sodium alginate-biochar composite adsorbent

Journal of Water Process Engineering, Год журнала: 2024, Номер 64, С. 105655 - 105655

Опубликована: Июнь 14, 2024

Язык: Английский

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The influence of Mn(II) on transformation of Cr-absorbed Schwertmannite: Mineral phase transition and elemental fate

Water Research, Год журнала: 2024, Номер 257, С. 121656 - 121656

Опубликована: Апрель 22, 2024

Язык: Английский

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An iron-based metal-organic framework with strong water stability and effective adsorption of methylene blue from wastewater

Journal of Solid State Chemistry, Год журнала: 2025, Номер unknown, С. 125174 - 125174

Опубликована: Янв. 1, 2025

Язык: Английский

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Biochars and modified-biochars for toxic-metal/metalloid ions sorption in various mixed solution systems: A review on kinetic and isotherm models

Desalination and Water Treatment, Год журнала: 2024, Номер 319, С. 100404 - 100404

Опубликована: Май 23, 2024

Both biochars (BCs) and modified-biochars (MBCs) for toxic-metal/metalloid ions (TMIs) removal from water have caught much attention owing to their exceptional properties such as eco-friendly, low-carbon emission cost-effective. However, reviews on the exploration of theoretical models BCs MBCs in various systems are unobtainable. To give a summary TMIs solution systems, this review will center some typical kinetic isotherm equations sorption single, mixed, mixed metal ions/organic substance solutions. Typically, two-parameter three- parameter were stressed. The comparisons these drawn. It was found that P-2nd-O model, Langmuir Freundlich dominating adsorption manners MSSs. Especially, only Cu(II), Pb(II), Cr(VI) Cd(II) sorption, well isotherms Cu(II) reported We hope be favorable accurately selecting optimal explain processes different metal-solution systems.

Язык: Английский

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Novel nanocomposite synthesis of carboxymethyl cellulose coated to zero-valent iron supported on chitosan for simultaneous removal of heavy metals and pesticides in water: Performance and mechanism

Results in Chemistry, Год журнала: 2025, Номер unknown, С. 102041 - 102041

Опубликована: Янв. 1, 2025

Язык: Английский

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Preparation and Characterization of Unactivated, Activated, and γ-Fe2O3 Nanoparticle-Functionalized Biochar from Rice Husk via Pyrolysis for Dyes Removal in Aqueous Samples: Comparison, Performance, and Mechanism

ChemEngineering, Год журнала: 2025, Номер 9(2), С. 30 - 30

Опубликована: Март 10, 2025

This study aimed at preparing three types of biochar derived from rice husk via pyrolysis, including unactivated biochar, chemically activated after with H3PO4, and impregnated γ-Fe2O3 nanoparticles. These materials were subsequently characterized using Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) analysis, which revealed favorable textural properties, such as an increased surface area porosity, well the presence functional groups that facilitate adsorption methylene blue malachite green in aqueous solutions. Several factors affect capacity, type material, pH effect, adsorbent dosage, evaluated optimized. The behavior was analyzed isotherm kinetic models to better understand mechanisms involved. Under optimal conditions, biochar@γ-Fe2O3 NPs emerged most effective material due its high area, functionalized surface, magnetic allowing easy water recovery without need for complex instrumentation. Among evaluated, pseudo-second-order model exhibited highest linear regression coefficient (R2 = 0.99), supporting a chemisorption process driven by strong interactions stable chemical bond formation between adsorbate adsorbent, while equilibrium data fit Sips model, indicating combination monolayer multilayer mechanisms. achieved removal efficiencies 97% 95% green, demonstrating performance reusability over four cycles. Moreover, possible mechanism MB on proposed explain interaction dye surface. Thus, this work demonstrates is sustainable cost-effective wastewater treatment, integrating circular economy principles transforming into high-value material. incorporation nanoparticles enhances enabling recovery, providing eco-friendly scalable solution removal.

Язык: Английский

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Immobilization of zirconium-modified activated carbon in an alginate matrix for the removal of atrazine: Preparation, performances and mechanisms

Environmental Technology & Innovation, Год журнала: 2024, Номер 35, С. 103699 - 103699

Опубликована: Май 31, 2024

As an organic herbicide widely used in agriculture, atrazine has the characteristics of environmental persistence, high mobility and long half-life period, posing potential risks to ecological environment. The materials commonly remove are powdered activated carbon its modified materials, which have problems such as difficulty recycling secondary contamination. In order solve above problems, this study, a new functional material EI-Zr@AC was prepared by immobilizing zirconium-modified powder (Zr@AC) alginate matrix via embedding immobilization (EI) technique, employed for removing water. At optimal preparation conditions 2.5% sodium alginate, 4.0% CaCl2, 1.0% Zr@AC 2.0% bentonite, beads had porosity, dense reticulation, large number groups with mechanical strength mass transfer properties. When solution pH 3.0, temperature 25°C, dosage 16 g/L, removal efficiency 91.9%. It showed that mainly chemisorption multimolecular layer adsorption. addition, could be recycled after simple method, at 5.0 mg/L still 55.5% five cycles, structure remained intact Zr ion leaching rate very low. results kind remediation application value.

Язык: Английский

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A two-dimensional cobalt-based metal–organic framework efficiently adsorbs Cr(VI) from wastewater

Inorganic Chemistry Communications, Год журнала: 2024, Номер 169, С. 113052 - 113052

Опубликована: Авг. 29, 2024

Язык: Английский

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