Insight into microwave-assisted synthesis of the chitosan-MOF composite: Pb(II) adsorption

Environmental Science and Pollution Research, Journal Year: 2022, Volume and Issue: 30(3), P. 6216 - 6233

Published: Aug. 22, 2022

Language: Английский

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Remediation of Methyl Red Dye from Aqueous Solutions by Using Biosorbents Developed from Floral Waste

Adsorption Science & Technology, Journal Year: 2023, Volume and Issue: 2023

Published: Jan. 1, 2023

The disposal of biological waste into water bodies is a major global concern as it leads to pollution resulting in the loss plenty revenue cleaning bodies. Here, present research work, sacred flowers were collected, segregated, sun-dried, and powdered. dried floral powders (marigold rose) characterized by field emission scanning electron microscopy (FESEM), diffraction spectroscopy (EDS), Fourier transforms infrared (FT-IR), X-ray (XRD). revealed irregular spherical shape sheet-like structure whose size varies microns. EDS elemental composition which was dominated mainly carbon oxygen. XRD shows presence (10-25 ɵ ) amorphous form absence any crystalline phase biosorbents. FT-IR showed peaks that conformed functional groups like -OH carbonyl group. used an economical eco-friendly biosorbent for removal methyl red (MR) dye from aqueous solutions batch adsorption study. After 60 minutes contact time, marigold powder (MGP) rose petal (RPP) decolorization 61.16% 56.08% 2 ppm MR dye. kinetic reaction does not follow pseudo-first-order well pseudo-second-order. utilization such waste-based biosorbents will minimize solid also provide environmental pollutants.

Language: Английский

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Modified chitosan adsorbents in pharmaceutical simulated wastewaters: A review of the last updates

Carbohydrate Polymer Technologies and Applications, Journal Year: 2023, Volume and Issue: 5, P. 100313 - 100313

Published: April 16, 2023

Language: Английский

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Organically modified montmorillonite composited with magnetic glyoxal-chitosan Schiff base for reactive blue 19 dye removal: Process optimization and adsorptive mechanism

International Journal of Biological Macromolecules, Journal Year: 2023, Volume and Issue: 256, P. 128463 - 128463

Published: Nov. 27, 2023

Language: Английский

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Flexible Synthesis of Bio-Hydroxyapatite/Chitosan Hydrogel Beads for Highly Efficient Orange G Dye Removal: Batch and Recirculating Fixed-Bed Column Study

ACS Omega, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 7, 2024

The use of fish waste as a source material for the development functional beads has significant potential applications in fields materials science and environmental sustainability. In this study, biomaterial bead chitosan was cross-linked with bio-hydroxyapatite (Bio-Hap/Cs) through encapsulation process to create stable durable material. are characterized using scanning electron microscopy combined energy dispersive X-ray spectrometry, Fourier transform infrared spectroscopy, diffraction techniques. adsorption efficiency Bio-Hap/Cs hydrogel evaluated by Orange G (OG) dye both batch recirculating column systems, effect various parameters on capacity investigated. it found that OG removal increased an increasing pH adsorbent dose. However, system, higher bed height lower flow rate led dye. kinetic study indicated pseudo-second-order model provided good description onto processes, high coefficient correlation. maximum adsorbed amounts be 19.944 mg g–1 9.472 respectively. Therefore, have demonstrated effective reusable remediation from aqueous solutions processes.

Language: Английский

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Biosorption of heavy metal ions from contaminated wastewater: an eco-friendly approach

Green Chemistry Letters and Reviews, Journal Year: 2024, Volume and Issue: 17(1)

Published: May 31, 2024

Several industries such as leather tanning, coal mining, steel and metal processing are responsible for heavy metals contamination in water. Heavy water can have harmful effects on both aquatic terrestrial animals by entering the food chain. Due to higher toxicity of metals, it is necessary remove ions from There several physio-chemical methods available, including ion exchange, membrane filtration, chemical oxidation, electrochemical methods. However, these some disadvantages like expensive generating byproducts. Biosorption a cost-effective eco-friendly method removal contaminated Biosorbents derived biomasses plant, bacterial, algal, fungal, agro-waste, etc. The biosorbents functional groups their surface providing them high binding capacity ions. Mathematical models isotherms, thermodynamics, kinetic studies help explain how adsorb biosorbents. This review provides comprehensive details source, biosorption also mechanism mathematical models.

Language: Английский

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Environmentally benign freeze dried biopolymer-based cryogels for textile wastewater treatments: A review

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 276, P. 133931 - 133931

Published: Sept. 1, 2024

Language: Английский

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Remarkable Adsorption of Anionic Dye on the Supported Magnetic and Non-Magnetic Polymeric Nanocomposites Including Chitosan/Polyacrylamide and Chitosan/Polylactic Acid

Water Air & Soil Pollution, Journal Year: 2024, Volume and Issue: 235(6)

Published: May 25, 2024

Language: Английский

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Applications of ion exchange resins in environmental remediation

Vietnam Journal of Chemistry, Journal Year: 2023, Volume and Issue: 61(5), P. 533 - 550

Published: July 24, 2023

Abstract The presence of various types contaminants such as heavy metals, emerging organic contaminants, pesticides, waste, dyes, radionuclide's, fluorides, etc. cause water pollution. These pollutants are concern to engineers, environmentalists and scientists. Due the lack freshwater, it is very important recycle wastewater after treatment remove contaminates metal pollutants. Chemical precipitation, ion exchange, adsorption, filtration via membranes, flocculation, coagulation, flotation, electrochemical techniques just a few methods used eliminate from wastewater. most popular effective among these exchange process. New generation hybrid materials, inorganic three‐dimensional matrices synthetic resins some examples different resins. Most investigations have found that pseudo‐first second order kinetic studies in contaminant removal isotherm model, which also incorporates Langmuir, Freundlich, Dubinin Radushkevich, Temkin equations, proved appropriate for research. For an example, orgnic polymeric materials can maximum uptake capacity 4.28 mmolg ‐1 Cr(VI) 1.97 As(V) respectively. effectiveness exchanger its current trends environmental applications been main topics this review article.

Language: Английский

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Removal of wood dyes from aqueous solutions by sorption on untreated pine (Pinus radiata) sawdust

Cellulose, Journal Year: 2023, Volume and Issue: 30(7), P. 4587 - 4608

Published: March 20, 2023

Abstract In this work, the possibility of using un-treated pine ( Pinus radiata ) sawdust as biosorbent for removal three wood dyes (blue, red and black) from aqueous solutions was investigated. The BET surface area material 1.55 ± 0.81 m 2 g −1 N at − 196 °C 17.83 0.032 CO 0 °C. point zero charge 4.8. addition, characterized before after adsorption by analytical techniques. Assays were performed to analize stability with time pH also estimate pKa values. Batch experiments influence experimental parameters such contact (up equilibrium), stirring rate (100 210 rpm), adsorbent dose (2–10 L ), (2–9) initial dye concentration (5 300 mg studied. optimum conditions 6 highest percentages achieved 5 were: 100.0% blue, 99.7% black 92.4% red. For efficiency decreased 85.6, 57.0 63.8% ones, respectively. Kinetic data best fitted pseudo-second order model, suggesting a chemisorption process. Freundlich Dubidin-Radushkevich isotherm models. Regeneration study showed that could be reused efficiently least in up four repeated adsorption–desorption cycles NaOH desorption agent.

Language: Английский

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