A Comprehensive Review on Application of Different Natural and Chemically Modified Nanomaterials Adsorbents for Heavy Metals Removal

Journal of Inorganic and Organometallic Polymers and Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

Language: Английский

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Efficient and low-cost mesoporous magnetic carbon composites derived from date palm stones for environmental remediation of hexavalent chromium

Journal of Porous Materials, Journal Year: 2024, Volume and Issue: 31(4), P. 1503 - 1517

Published: April 23, 2024

Abstract This study was performed to achieve two important scientifically challenging goals, environmental remediation of toxic heavy metals and utilization agricultural lignocellulosic wastes. In this work, a series mesoporous magnetic carbon (MMC) adsorbents were synthesized by carbothermic reduction at different temperatures employing date palm (Phoenix dactylifera L.) stones as the source. The characterized technquies results confirmed presence zero-valent iron (ZVI) nanoparticles other oxides products carbothermal reduction. nature phases present, crystallite size surface properties found be dependent on calcination temperature. adsorbent MMC700 exhibited smallest 36 nm largest S BET 341 m 2 /g. All showed structure with mesopore average diameter lower than 6 nm. performance evaluated in removal process Cr(VI) an aqueous medium, optimum conditions reported. dependant solution pH where best achieved = 2. Complete chromium less 5 min MMC700. better fitted pseudo-second-order kinetics followed Freundlich model isotherm. maximum adsorption capacity 265.25 mg/g for MMC700, suggesting its application efficient, low-cost, easily separable process. prepared superior compared wastes or biomass - derived reported literature.

Language: Английский

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Thiol-functionalized black carbon as effective and economical materials for Cr(VI) removal: Simultaneous sorption and reduction

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 360, P. 121074 - 121074

Published: May 15, 2024

Language: Английский

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Phenolic hydroxyl anchored covalent organic frameworks aerogels for efficient and fast removal of Cr (VI) from water

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 145293 - 145293

Published: March 1, 2025

Language: Английский

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Cr(VI) Adsorption by Mg/Al Layered Double Hydroxide-Modified Sphagnum Moss Cellulose Gel: Performance and Mechanism

Molecules, Journal Year: 2025, Volume and Issue: 30(8), P. 1796 - 1796

Published: April 17, 2025

Hexavalent chromium (Cr(VI)), a highly toxic and carcinogenic contaminant, presents significant hazard to aquatic ecosystems human health. Developing environmentally friendly, cost-effective, biodegradable, easily recyclable adsorbents is critical for efficient Cr(VI) removal. Here, we present an innovative solution using Mg/Al layered double hydroxide (LDH)-modified sphagnum cellulose gel (MgAl/LDH@SMCG), prepared by pre-treating cellulose, crosslinking with polyvinyl alcohol, doping LDH. The resulting porous composite features abundant -COOH -OH chelating groups, significantly enhancing its adsorption capacity structural stability. material’s structure surface modifications were systematically characterized SEM, TGA, FT-IR, XPS. Batch experiments conducted assess the influence of adsorbent dosage, initial concentration, pH, contact time, temperature on performance. Adsorption kinetics, isotherms, thermodynamics analyses revealed primary mechanism monolayer chemical adsorption, experimental data closely fitting Freundlich isotherm pseudo-second-order kinetic models. modified exhibits increased roughness sites, in markedly improved removal efficiency. This study not only provides theoretical insights into but also highlights potential LDH-functionalized gels heavy metal wastewater treatment, offering sustainable pathway addressing global water contamination challenges.

Language: Английский

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Polydopamine-integrated cellulose/graphene oxide monoliths: A versatile platform for efficient continuous-flow iodine capture and photothermal-enhanced reduction of Cr(VI)

Carbohydrate Polymers, Journal Year: 2024, Volume and Issue: 351, P. 123090 - 123090

Published: Nov. 30, 2024

Language: Английский

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Removal of hexavalent chromium using polyphenol-based functional materials

E3S Web of Conferences, Journal Year: 2024, Volume and Issue: 536, P. 03011 - 03011

Published: Jan. 1, 2024

Chromium from industrial wastewater, waste, pesticides, fertilizers, etc., always causes serious environmental problems. High levels of chromium pollution can have adverse effects on environments and living organisms. In this study, titanium salt was used to react with green tea extract form a composite material, the material further remove hexavalent in solution. The removal effect investigated under different reaction conditions, namely temperature, time, pH, initial concentration. results showed that best conditions acid neutral 45℃, time 24 h, concentration 80 mg/L. This study provides feasible method solve problem has high application value wastewater treatment.

Language: Английский

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Potassium chloride assisted pyrolysis to fabricate low-valent iron rich magnetic biochar for ultra-fast removal of hexavalent chromium: Performance and mechanism

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 69, P. 106798 - 106798

Published: Dec. 17, 2024

Language: Английский

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