Synthesis and application of novel sodium carboxy methyl cellulose-g-poly acrylic acid carbon dots hydrogel nanocomposite (NaCMC-g-PAAc/ CDs) for adsorptive removal of malachite green dye

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: unknown, P. 100822 - 100822

Published: Oct. 1, 2024

Language: Английский

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Novel palm peat lignocellulosic adsorbent derived from agricultural residues for efficient methylene blue dye removal from textile wastewater

Applied Water Science, Journal Year: 2025, Volume and Issue: 15(2)

Published: Jan. 27, 2025

Abstract Palm Peat (PP), the world’s first rich lignocellulosic medium derived from date palm agricultural residues, has not been previously explored for environmental purification. This study evaluates PP's performance in adsorbing methylene blue (MB) dye. PP is characterized by a spongy, porous structure with surface area of 16 m 2 /g. It possesses significant carbon and oxygen composition features active functional groups. Under conditions 30 mg/L initial MB concentration, 1 g/L dose, T = °C, pH 7, 900 rpm stirring speed, achieved 68.26% removal efficiency within 90 min. Although higher temperatures enhanced efficiencies, room temperature (30 °C) was chosen subsequent experiments to assess adsorption under ambient minimize energy consumption. Stirring speeds exceeding reduce efficiency, likely due shear forces disrupting interaction between molecules or causing desorption adsorbed dye molecules. Response methodology combined central composite design employed optimize dosage, solution pH. optimum conditions, 97.89% removal. exhibited strong stability over five cycles. Adsorption occurs via π-π stacking, hydrogen bonding, hydrophobic-hydrophobic interactions, electrostatic process being endothermic following Langmuir isotherm model pseudo-second-order kinetic model. The studies across different water matrices revealed lowest degradation rate drain matrix. 71.5% 48.16% TOC real textile wastewater.

Language: Английский

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Investigating the Interactions between Dyes and Porous/Composite Materials: A Comprehensive Study

Sustainable Chemistry for the Environment, Journal Year: 2025, Volume and Issue: unknown, P. 100217 - 100217

Published: Feb. 1, 2025

Language: Английский

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Enhanced dye photodegradation through ZnO and ZnO-based photocatalysts doped with selective transition metals: a review

Environmental Technology Reviews, Journal Year: 2024, Volume and Issue: 13(1), P. 754 - 793

Published: Nov. 28, 2024

Disposing of wastewater contaminated with dyes into the environment results in water pollution, which endangers aquatic life and leads to severe health issues for all living species. Zinc oxide-assisted heterogeneous photocatalysis is a significant approach treating dyes. However, its wide energy gap, activated only by UV light, high electron hole pairs recombination rate constrain photocatalytic activities. This review emphasizes impact doping ZnO transition metals non-metals on dye degradation. Both significantly enhances ZnO's photoactivity reducing band shifting absorption edge visible spectrum, producing more oxygen vacancies crystal defects, decreasing conduction electrons valence holes, boosting surface area. The characteristic nanostructures contingent upon their physiological characteristics, including morphology, particle size. It also includes data from literature regarding some dyes' potential degradation pathways mechanisms using ZnO-based photocatalysts. Molecular other reactive species, O2•−, HO2•, H2O2, •OH, produced series reactions, play part degrading effect several operational parameters photodegradation efficiency has been studied detail, solution's pH, concentration, contact time, photocatalyst dose, oxidizing agents, reaction temperature, light intensity. looks at various techniques utilized prepare Future perspectives challenges photocatalysts are discussed.

Language: Английский

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Fabrication of 3D Graphene-Silk Elastic Aerogels for Sustainable and Efficient Removal of Organic Dyes from an Aqueous Medium

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

Water pollution by dyes is a serious environmental issue of modern society that needs to be addressed effectively. Herein, promising adsorbent, i.e., 3D composite aerogel, was developed using reduced graphene oxide and silk fibroin (rGO-SF) via hydrothermal freeze-drying techniques. The efficiency the prepared aerogel toward methylene blue (MB) dye adsorption explored in batch experiments. A study revealed capacity rGO-SF120 as 249.89 mg/g dye. also selectively adsorbs MB over other dyes, such rhodamine B (RhB) orange (MO). process mainly chemical (as data fitted well both pseudo-second-order Elovich kinetic models) followed Langmuir model, indicating it formed single layer on its surface. Overall, an effective potential candidate for treating dye-loaded water with high efficiency.

Language: Английский

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Synthesis and Characterization of Kappa (κ)-Carrageenan-grafted poly (acrylic acid-co-itaconic acid)/ Multi-walled Carbon Nanotube (κC-g-poly (AAC-co-IA)/ MWCNT) Composite for Removing Safranin-O Dye from Aqueous Solution

Process Safety and Environmental Protection, Journal Year: 2025, Volume and Issue: unknown, P. 106828 - 106828

Published: Jan. 1, 2025

Language: Английский

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Adsorptive removal of hazardous cadmium ions from aqueous media using low-rank Pakistani coal

Journal of Dispersion Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 12

Published: Feb. 7, 2025

Water is essential for all life forms, serving as the fundamental element biological processes and sustaining ecosystems. Cadmium ions (Cd II) are highly toxic often found in industrial effluents, polluting water, soil, atmosphere. This study investigates low-rank Pakistani coal (LRPC) an adsorbent removing Cd (II) from wastewater. Characterization of LRPC was carried out with scanning electron microscopy (SEM) Fourier-transform infrared spectroscopy (FTIR). These techniques demonstrated changes adsorbent's properties after adsorption. Batch adsorption experiments were systematically to effects exposure time, pH, mass, temperature, initial concentration metal ions. The pseudo-second-order kinetic model, a correlation coefficient (R2) 0.99, best described process. 90% removal achieved within 70 min at pH 5, using 0.5 grams 10 mL 8.896 × 10−³ mol/L cadmium solution. Freundlich isotherm exhibited fit data, 0.99. Thermodynamic analysis indicated that process non-spontaneous endothermic, sorption energy 4.09 kJ/mol suggesting physisorption mechanism. impact foreign desorption also evaluated. novelty this lies its exploration low-cost effective findings show can be used economical biosorbent remove (II), aiding environmental cleanup initiatives.

Language: Английский

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Phyto‐mechanochemical Synthesis of Copper Ferrite Nanoparticles: Structural, Magnetic, Photocatalytic, and Antibacterial Properties

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(8)

Published: Feb. 1, 2025

Abstract Sustainable nanotechnology is becoming more prominent daily, especially in preparing magnetic nanoparticles like CuFe 2 O 4 . This work involves the phyto‐mechanochemical (mechanical and green) synthesis of NPs by Spinacia oleracea leaf extract. Various spectroscopic analytical techniques including FTIR, UV–vis, XRD, SEM, VSM, EDX, BET, confirmed formation characterizations CuFe₂O₄ with 26 nm diameter. Results from VSM analysis demonstrated ferromagnetism high saturation magnetization. At same time UV–vis spectroscopy showed optical characteristics these materials. The photocatalytic properties were tested through decoloration textile industry pollutant congo red (CR) dye. an effective degradation rate 89% for CR dye during a 90 min incubation period under their best operating conditions. mechanism was studied kinetic measurements utilizing first‐order Langmuir‐Hinshelwood models. nanoparticle size bioactive enabled them to demonstrate powerful antibacterial capabilities against Streptococcus Escherichia coli bacteria. Uniformity key feature phyto‐mechanically synthesized while demonstrating potential environmental remediation biomedical research.

Language: Английский

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Applications of heavy metal-based nanoparticles in cosmetics: a comprehensive review

Cutaneous and Ocular Toxicology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 18

Published: March 12, 2025

The utilisation of heavy metal-based nanoparticles in cosmetic products has been steadily increasing because their extraordinary physicochemical properties and benefits. In this thorough review, we will delve into the various types nanoparticles, such as green metallic carbon-based with a special focus on nanoparticles. These exhibit exceptional physical mechanical properties, making them suitable materials for personal care products. Silver effectively treat acne have strong antimicrobial while gold anti-ageing anti-inflammatory properties. ZnO TiO2 are commonly used sunscreens ultraviolet (UV) filters to protect against ultraviolet-A (UVA) ultraviolet-B (UVB) radiation. Certain metals like nickel, chromium, cobalt major allergens, frequently causing contact dermatitis allergic reactions sensitive individuals. Extensive use cadmium, lead, mercury, arsenic (metalloid) cosmetics poses long-term health risks, including carcinogenicity, neurotoxicity, organ damage. herbal extracts containing further improves effectiveness due antioxidant Consumer awareness regulatory concerns, especially among those metal allergies, crucial understanding potential risks associated metal-containing cosmetics. Looking ahead, future research efforts should concentrate development safer, non-toxic, natural nanomaterials biocompatible alternatives

Language: Английский

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Cost-Effective Walnut Shell Biosorbent for Efficient Cr(VI) Removal from Water: Batch Adsorption and Optimization Using RSM-BBD

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: unknown, P. 100783 - 100783

Published: Sept. 1, 2024

Language: Английский

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