Recent Developments in the Adsorption of Heavy Metal Ions from Aqueous Solutions Using Various Nanomaterials

Materials, Journal Year: 2024, Volume and Issue: 17(21), P. 5141 - 5141

Published: Oct. 22, 2024

Water pollution is caused by heavy metals, minerals, and dyes. It has become a global environmental problem. There are numerous methods for removing different types of pollutants from wastewater. Adsorption viewed as the most promising financially viable option. Nanostructured materials used effective adsorption techniques to extract metal ions Many nanomaterials, such zero-valent oxides, carbon magnetic nanocomposites, adsorbents. Magnetic nanocomposites adsorbents have properties abundant active functional groups, unique nanomaterials endow them with better than nonmagnetic (classic adsorbents). Nonmagnetic adsorbents) typically limitations limited capacity, adsorbent recovery, poor selective adsorption, secondary treatment. easy recover, strong selectivity high safe economical, always been hotspot research. A large amount data collected in this review, which based on an extensive study synthesis, characterization, capacity elimination wastewater their separation water. The effects several experimental parameters ion removal, including contact duration, temperature, dose, pH, starting concentration, ionic strength, also investigated. In addition, variety illustrations describe various kinetics isotherm models, providing insight into process.

Language: Английский

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Efficacious Removal of Cd2+ and Pb2+ Ions from Wastewater Using a Novel Fe3O4/SiO2/PANI-SDBS Nanocomposite

Materials, Journal Year: 2025, Volume and Issue: 18(9), P. 2083 - 2083

Published: May 1, 2025

The current work synthesizes and characterizes a new Fe3O4/SiO2/PANI-SDBS nanocomposite designed as an efficient adsorbent for the removal of Cd2+ Pb2+ ions from contaminated water. process includes polymerization aniline on Fe3O4/SiO2 in presence SDBS. was characterized by using variety techniques, including FT-IR, XRD, TEM, SEM, BET, TGA, zeta potential measurements, particle size distribution analysis, to evaluate its magnetic, structural, surface properties. For elimination both ions, ideal adsorption parameters were examined, pH, dose, contact duration. solution medium's optimal pH achieving highest effectiveness metal decided be 7.0. demonstrated high capacities (72.20 mg g-1) (67.84 at 7, with corresponding efficiencies over 94.10% 77.47%, respectively. This efficiency is attributed composite's large specific area strong binding affinity PANI SDBS functional groups toward heavy ions. Multilayer heterogeneous surfaces shown isotherm analysis that matched Freundlich model kinetic investigations showed conformance pseudo-second order thermodynamic study proves endothermic spontaneous Furthermore, may readily recovered thanks magnetic core, regeneration acid treatment enables reusability consistent across several cycles, making it cost-effective sustainable option continuous water purification processes. Its capacity also make suitable use emergency-response situations, such rapid cleanup wastewater.

Language: Английский

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Silica nanoparticles@folic acid (SNPs@FA) nanocomposite for the effective removal of Hg(II) from aqueous solution: insight into physicochemical properties, adsorption modelling, isotherm, kinetic, and thermodynamic investigations

International Journal of Environmental & Analytical Chemistry, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 28

Published: Nov. 25, 2024

Language: Английский

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