Adsorptive removal of synthetic dye from its aqueous solution by using chitosan-bentonite composite: DFT and experimental studies

Polymer Bulletin, Год журнала: 2024, Номер 81(14), С. 12795 - 12817

Опубликована: Май 24, 2024

Abstract This research investigates the adsorption efficiency of a chitosan-bentonite (Ch–B) composite in removing methyl orange (MO), common textile dye, from aqueous solutions. The study integrates experimental and theoretical analyses, employing density functional theory (DFT) to gain insights into molecular interactions between material MO molecules. Ch–B was characterized using various techniques, including FT-IR spectroscopy, XRD, SEM–EDX. results indicate that exhibits high capacity for MO, with optimal conditions identified efficient removal. Langmuir model found best fit data 117 mg g −1 . Adsorption thermodynamics showed process spontaneous, feasible, exothermic. DFT calculation are correlated findings confirm predictions improve overall understanding process. Electronic structure calculations reveal nature molecules, hydrogen bonds electrostatic forces.

Язык: Английский

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A sustainable nano-hybrid system of laccase@M-MWCNTs for multifunctional PAHs and PhACs removal from water, wastewater, and lake water

Environmental Research, Год журнала: 2024, Номер 246, С. 118097 - 118097

Опубликована: Янв. 2, 2024

This study examined the use of modified multiwall carbon nanotubes (M-MWCNTs) with immobilized laccase (L@M-MWCNTs) for removing ciprofloxacin (Cip), carbamazepine (Cbz), diclofenac (Dcf), benzo[a]pyrene (Bap), and anthracene (Ant) from different water samples. The synthesized materials were characterized using an array advanced analytical techniques. physical immobilization onto M-MWCNTs was confirmed through Scanning electron microscope (SEM)-dispersive X-ray spectroscopy (EDS) analysis Brunner-Emmet-Teller (BET) surface area measurements. specific decreased by 65% upon immobilization. There also increase in nitrogen content seen EDS asserting successful results Boehm titration Fourier transform infrared (FTIR) exhibited acidic functional groups after L@M-MWCNTs storage two months maintained 77.8%, 61.6%, 57.6% its initial activity 4 °C, 25 35 respectively. In contrast, free 55.3%, 37.5%, 23.5% at MWCNTs improved storability widened working temperature range laccase. optimum removal conditions studied pollutants pH 5, 1.6 g/L M-MWCNTs. These parameters led to >90% targeted four treatment cycles both synthetic spiked lake water. demonstrated consistent up five even wastewater. adsorption endothermic followed Langmuir isotherm. Oxidation, dehydrogenation, hydroxylation, ring cleavage seem be dominant degradation mechanisms.

Язык: Английский

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Biochar-Based Strategies for Antibiotics Removal: Mechanisms, Factors, and Application

ACS ES&T Engineering, Год журнала: 2024, Номер 4(6), С. 1256 - 1274

Опубликована: Апрель 22, 2024

The increasing use of antibiotics induces the spread antibiotic-resistant genes (ARGs) in environment, which seriously threatens natural ecosystem and human health. Reducing environment is utmost importance. Biochar, as a cost-effective, environmentally friendly, carbon-rich porous material with circular economy prospects, has shown great potential antibiotic remediation environment. adsorption mechanisms (e.g., electrostatic interaction, hydrogen bonding hydrophobic π–π electron donor–acceptor (EDA) pore diffusion) biotic roles biochar microbial shelter, carrier, mediator) synergistically promote removal from aqueous phase. This review critically discusses various based on classes antibiotics, efficacy removal, influence crucial parameters antibiotics. Furthermore, provides critical discussion engineering application biochar. Finally, highlights prospects challenges treating antibiotic-contaminated liquid streams.

Язык: Английский

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Bioremediation of organic pollutants by laccase-metal–organic framework composites: A review of current knowledge and future perspective

Bioresource Technology, Год журнала: 2024, Номер 406, С. 131072 - 131072

Опубликована: Июль 4, 2024

Язык: Английский

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Global insights into biochar: Production, sustainable applications, and market dynamics

Biomass and Bioenergy, Год журнала: 2025, Номер 194, С. 107663 - 107663

Опубликована: Фев. 6, 2025

Язык: Английский

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Biochar as an Enzyme Immobilization Support and Its Application for Dye Degradation

Processes, Год журнала: 2024, Номер 12(11), С. 2418 - 2418

Опубликована: Ноя. 1, 2024

Wastewaters generated by the textile industry often contain significant amounts of harmful (carcinogenic and mutagenic) cationic dyes, whose efficient removal is crucial importance. This study investigates laccase immobilization on biochar obtained from sour cherry stones (SCS-B), as a cost effective adsorbent, evaluates its application for brilliant green (BG) degradation. The successful was achieved via adsorption confirmed using scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) Fourier transform infrared spectroscopy (FTIR). An efficiency 66% 0.274 U/mL at pH 5 temperature 40 °C. kinetics followed pseudo-second-order model, indicating that chemical plays role in process. BG degradation immobilized system further optimized evaluating effects pH, temperature, dye concentration, contact time. More than 92% (50 mg/L) removed within 4 h 30 These findings suggest SCS-B can effectively be used an enzyme carrier utilized emerging pollutants, positioning it sustainable solution wastewater treatment.

Язык: Английский

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Biochar from green coconut husk as a sustainable support for laccase immobilization: Preparation, characterization, and preliminary application

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 116960 - 116960

Опубликована: Май 1, 2025

Язык: Английский

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Utilization of Agricultural Waste for Water and Wastewater Treatment Processes

Опубликована: Янв. 1, 2024

Язык: Английский

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Suppression mechanism of soilborne diseases by biochar: Immobilization and deactivation of pathogenic enzymes and toxic metabolites

Scientia Horticulturae, Год журнала: 2023, Номер 325, С. 112707 - 112707

Опубликована: Ноя. 25, 2023

Язык: Английский

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