Review on high-value utilization of phosphogypsum: Utilization of calcium and oxygen resources present in phosphogypusm

Separation and Purification Technology, Год журнала: 2024, Номер 344, С. 127246 - 127246

Опубликована: Март 26, 2024

Язык: Английский

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Nanoporous N-Rich Covalent Organic Frameworks with High Specific Surface Area for Efficient Adsorption of Iodine and Methyl Iodide

ACS Applied Nano Materials, Год журнала: 2023, Номер 6(19), С. 18177 - 18187

Опубликована: Сен. 26, 2023

With the rapid development of nuclear industry, effective treatment radioactive iodine has become an urgent and challenging task. In this article, we synthesized a nanoporous nitrogen-rich covalent organic framework (TTA-DMTP-COF) with specific surface area up to 2332 m2/g for adsorption (I2) methyl iodide (CH3I). Adsorption experiments showed that TTA-DMTP-COF exhibited I2 CH3I properties; maximum capacity is as high 2.59 g·g–1, 1.60 g·g–1. addition, can effectively adsorb from iodine–cyclohexane solution, amount 516.46 mg/g. Mechanistic studies have shown enter nanopores COF materials form charge transfer complexes various functional groups in (including imines, triazine moieties, residual amino groups). The N-methylation reaction specifically binds nucleophilic N site generates polyiodides during process. Our work demonstrates excellent candidate material capable capturing air solution harsh environments.

Язык: Английский

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The treatment of phosphogypsum leachate is more urgent than phosphogypsum

Environmental Research, Год журнала: 2024, Номер 262, С. 119849 - 119849

Опубликована: Авг. 27, 2024

Язык: Английский

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Sustainable removal of tetracycline and paracetamol from water using magnetic activated carbon derived from pine fruit waste

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Июль 16, 2024

Abstract This work presents highly porous magnetic activated carbon nanoparticles (MPFRC-A) derived from pine fruit residue. The MPFRC-A were produced through a three-step process: physical activation (carbonization temperature: 110–550 °C), chemical (H 2 SO 4 (0.1 N, 96%)), and co-precipitation. These then used to remove tetracycline (TC) paracetamol (PC) water. Functionalization with Fe 3 O on the surface of residue-derived (PFRC-A) resulted in high saturation magnetization, allowing for separation aqueous solution using an external magnet. adsorbent was characterized by Brunauer–Emmett–Teller (BET) analysis, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), Energy-dispersive (EDX) analyses, In experimental section, effects various factors adsorption process investigated, including pH, contact time, initial pollutant concentrations, dosage, temperature. Based these investigations, isotherm models kinetics studied determined. results showed that exhibited large specific area (182.5 m /g) total pore volume (0.33 cm /g). maximum capacity achieved at pH 6 5 PC TC drugs dose 400 mg concentration 20 mg/L 25 °C. study revealed data well-fitted Langmuir model (R > 0.98), uptake capacities 43.75 mg/g 41.7 PC. Outcomes thermodynamics shows non-spontaneity reaction all adsorbents endothermic.

Язык: Английский

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Highly efficient boron/sulfur-modified activated biochar for removal of reactive dyes from water: kinetics, isotherms, thermodynamics, and regeneration studies

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2025, Номер unknown, С. 136486 - 136486

Опубликована: Фев. 1, 2025

Язык: Английский

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Optimizing Mg-Fe layered double hydroxides and efficient removal of methyl orange: Screening, performance and mechanism

Environmental Technology & Innovation, Год журнала: 2024, Номер 34, С. 103629 - 103629

Опубликована: Апрель 4, 2024

This study investigates the influence of key factors on structure prepared MgFe-LDH and their application for removal methyl orange (MO). The optimal synthesis were determined through Scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), partition coefficient (PC) analysis to morphology, crystallinity, physicochemical properties resulting materials. Under conditions Mg2+/Fe3+=4, pH=11, aging temperature 80℃, well-structured Mg4Fe-LDH-11-80℃ was successfully synthesized with a theoretical maximum adsorption capacity 1688.22 mg/g MO. process follows Redlich-Peterson Avrami models, displaying exothermic characteristic. outstanding capability is likely attributed synergistic effects electrostatic attraction, hydrogen bonding, complexation reactions, ion exchange mechanisms. Furthermore, cost recycling experiments indicate that LDH material cost-effective suitable multiple reuse cycles, making it promising candidate treating wastewater containing MO dyes.

Язык: Английский

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Highly selective recovery of rare earth elements from mining wastewater using phyto-synthesized biochar dispersed iron nanoparticles

Separation and Purification Technology, Год журнала: 2024, Номер 353, С. 128491 - 128491

Опубликована: Июнь 18, 2024

Язык: Английский

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Neodymium adsorption from aqueous solution by β-cyclodextrin nanosponges and a polymer valorized from potato peels waste: experiments and conventional and statistical physics interpretations

Environmental Science and Pollution Research, Год журнала: 2024, Номер 31(13), С. 19974 - 19985

Опубликована: Фев. 17, 2024

Язык: Английский

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Enhanced dye removal and supercapacitor performance of polyethyleneimine-impregnated activated carbon derived from local eucalyptus biochar

RSC Sustainability, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

This study evaluated the effectiveness of low-cost eucalyptus biochar (EUBC) as a precursor for activated carbon (EUAC), methyl orange (MO) removal and supercapacitor applications.

Язык: Английский

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Highly efficient adsorption of direct Scarlet dye using guanidinium-based covalent organic polymer

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Апрель 21, 2025

Ionic covalent organic polymers are promising water pollutant adsorbents with enhanced adsorption potential compared to their neutral counterparts benefiting from both electrostatic attractions and the ion-exchange process. This work deals construction of a cationic COP through facile direct approach assessment its performance for scavenging Direct Scarlet 4BS (DS-4BS) anionic dye. Many analytical techniques including FT-IR, TGA, BET, XRD, zeta potential, FE-SEM/EDS were conducted validate this polymer formation. As results revealed maximum capacity (qmax) was obtained 236.4 mg/g under pH = 2, adsorbent quantity 0.005 g, dye concentration 250 ppm, time 3.5 h. Based on regression coefficient (R2) values, experimental data suitably matched Langmuir model, indicating monolayer best-fitted kinetics model pseudo-second-order. Also, according calculated energy (Ea 4.5 kJ/mol), mechanism mainly governed by physisorption Additionally, thermodynamic investigations that negative values standard free Gibb's (∆G0), process is spontaneous. positive value enthalpy (∆H0 38.5 kJ/mol) indicated endothermic nature adsorption, which means increases increase in temperature.

Язык: Английский

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