ULTRASONIC-ASSISTED ADSORPTION OF METHYLENE BLUE USING SHRIMP SHELLS AS A LOW-COST ADSORBENT: EVALUATION ON THE ADSORPTION ISOTHERM, KINETICS, AND THERMODYNAMICS

South African Journal of Chemical Engineering, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Synthesis and Characterization of Tetrasubstituted Porphyrin Tin(IV) Complexes and Their Adsorption Properties over Tetracycline Antibiotics

Reactions, Год журнала: 2025, Номер 6(1), С. 12 - 12

Опубликована: Фев. 6, 2025

New tetrasubstituted porphyrin tin complexes (5–14) were prepared in two different ways: In the first preparation procedure, by a direct reaction of butyltin trichloride and dibutyltin dichloride with tetra/tetrakis(4-X-phenyl)porphyrins (X = H, F, Cl, Br, CF3, CH3O, (CH3)2N). second same synthesized from lithium porphyrinato derivatives. These novel characterized elemental analysis, 1H, 13C NMR, FTIR, UV-Vis spectroscopy, mass spectrometry. Among these complexes, containing methoxy group [Bu2Sn(TMOPP)] was tested as an adsorbent to remove tetracycline antibiotics wastewater. The TTC antibiotic removal efficiency (R%) this complex measured using spectroscopy. After 120 min equilibration, final R% adsorption capacity (qt) at 60.15% 18.10 mg/g, respectively.

Язык: Английский

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Enhanced Mechanical Properties of Epoxy Resin Modified With Monomer Production From Depolymerization of Waste Polyethylene Terephthalate

Journal of Applied Polymer Science, Год журнала: 2025, Номер unknown

Опубликована: Март 19, 2025

ABSTRACT The recycling of waste polyethylene terephthalate (PET) can be facilitated by processing and utilizing the small molecules depolymerized from PET. To address poor post‐curing performance high internal cross‐linking in impact resistance, it is necessary for epoxy resin (EP) to undergo toughening modification broaden its applicability. In present study, a method used prepare monomer production depolymerization was proposed depolymerize PET through alcohol‐alkali combination. process parameters were further optimized with pretreatment. As depolymerization, recycled terephthalic acid (rTPA) treated as chain extender obtain high‐performance modified resins. Compared E51, mechanical properties rTPA‐modified significantly enhanced. For instance, when rTPA introduced amounts, tensile strength increased 46.7% 50.5 74.1 MPa, flexural improved 49.9% 78.9 118.3 bond 32% 4.38 MPa. content rose sharply, however, soared 384.3% 7.1 34.5 KJ/m 2 , modulus 196.4% 1039 3080 Meanwhile, water absorption rate remained at an extremely low level.

Язык: Английский

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Adsorptive Separation of Allura Red, Tartrazine, and Brilliant Blue Dyes from Aqueous Solution Using Amine‐Modified SBA‐15

ChemistrySelect, Год журнала: 2025, Номер 10(13)

Опубликована: Март 28, 2025

Abstract Food and textile dye effluents cause major health issues. organic dyes in industrial effluent are hazardous which can be purified by adsorption. But carbon recycling is difficult, thus recyclable adsorbents advantageous. In this context, SBA‐15/propyl‐NH 2 was synthesized, characterized, used to adsorb food (brilliant blue, allura red, tartrazine) water. The removal effectiveness (%) of adsorbent examined considering pH, dose, concentration, time, temperature. mechanism adsorption using pseudo‐first‐ pseudo‐second‐order kinetics. Langmuir, Freundlich, Temkin isotherms were evaluate adsorbent‐adsorbate interactions. thermodynamic parameters (∆G°, ∆S°, ∆H°) evaluated compared. Langmuir isotherm showed monolayer for all with R values around 1. With rate constant (k ) 0.0003 0.0013 g/mg min, the kinetics followed model. capacity tartrazine, brilliant red estimated at 403.22 mg/g, 395.25 485.43 mg/g respectively. Adsorption occurs a decrease free energy, negative enthalpy, entropy 25 °C. recyclability confirmed over three cycles, no reduction (%). Therefore, nanocomposite effectively separates from water‐based solutions.

Язык: Английский

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Sustainable water treatment: fruit waste-derived ethanol extract for SiO₂ surface modification and enhanced methylene blue adsorption

Desalination and Water Treatment, Год журнала: 2025, Номер unknown, С. 101146 - 101146

Опубликована: Март 1, 2025

Язык: Английский

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Harnessing Temperature‐Dependent Breathing Behaviour in Aluminium‐Based MOF for Enhanced Congo Red Dye Removal

Applied Organometallic Chemistry, Год журнала: 2025, Номер 39(5)

Опубликована: Апрель 1, 2025

ABSTRACT A novel and efficient strategy for dye adsorption is provided by unlocking the temperature‐dependent breathing behaviour of aluminium‐based metal–organic frameworks (Al‐MOF). Distinct from conventional MOF studies, this research uniquely elucidates dynamic structural adaptations Al‐MOFs that enable accommodation large molecules, specifically Congo red (CR). Hydrothermally synthesised Al‐MOFs—extensively characterised to confirm exceptional crystallinity, high porosity (BET surface area 173 m 2 g −1 ), thermal stability—exhibit a remarkable temperature‐responsive ‘breathing’ mechanism. Elevated temperatures induce reversible phase transitions narrow pores, resulting in significant expansion pore volume dramatically enhances CR adsorption, achieving maximum capacity 223.8 mg . The conforms Langmuir model (R > 0.990) follows pseudo–second‐order kinetics = 0.993), confirming homogeneous chemisorption. Thermodynamic analysis indicates process both spontaneous (ΔG° < 0 at ≥ 303 K) endothermic (ΔH° +82.06 kJ mol , ΔS° +271.7 J K further substantiating role Importantly, Al‐MOF demonstrates outstanding reusability, retaining over 90% efficiency after five cycles. These findings firmly establish as transformative, thermodynamically favourable, highly reusable adsorbents, offering promising solution advanced environmental remediation hazardous pollutants.

Язык: Английский

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One-step synthesis of TiO2@MWCNT by plasma reactor for wastewater purification

Materials Chemistry and Physics, Год журнала: 2025, Номер unknown, С. 130892 - 130892

Опубликована: Апрель 1, 2025

Язык: Английский

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