We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
A reusable mesoporous adsorbent for efficient treatment of hazardous triphenylmethane dye wastewater: RSM-CCD optimization and rapid microwave-assisted regeneration
Summary
Researchers synthesized a porous nanomaterial made from calcium and aluminum that can adsorb large amounts of the toxic industrial dye malachite green from wastewater, then rapidly regenerate it for reuse using microwave heating — retaining over 90% efficiency after five cycles. The approach offers an energy-efficient and reusable solution for removing hazardous organic pollutants from industrial wastewater.
In this research, mesoporous calcium aluminate nanostructures (meso-CaAl2O4) were synthesized using a citric acid-assisted sol-gel auto-combustion process as the potential adsorbent to eliminate toxic triphenylmethane dye malachite green (MG) from synthetic/real effluent. The surface morphology of meso-CaAl2O4 was highly porous with nanometric size and non-homogeneous surface. The specific surface area, total pore volume, and BJH pore diameter of meso-CaAl2O4 were 148.5 m2 g-1, 1.39 cm3 g-1, and 19 nm, respectively. The meso-CaAl2O4 also showed a very high heat resistance, due to losing only 7.95% of its weight up to 800 °C, which is mainly related to the moisture loss. The optimal adsorption conditions were obtained based on response surface methods (RSM)-central composite design (CCD) techniques. The Langmuir isotherm model was used for fitting the adsorption measurements, which presented 587.5 mg g-1 as the maximum adsorption capacity of the dye. The data obtained from the adsorption kinetics model were found to correspond to the pseudo-second-order model. Also, the thermodynamic parameters including enthalpy change (ΔH°), entropy change (ΔS°), and Gibbs free energy change (ΔG°) indicated that MG dye adsorption by the meso-CaAl2O4 was feasible, endothermic, and occurred spontaneously. Furthermore, the meso-CaAl2O4 was regenerated by microwave irradiation under 900 W at 6 min, and the MG dye removal efficiency was remained over 90% after the five cycles of microwave regeneration.
Sign in to start a discussion.
More Papers Like This
Rapid adsorptive removal of eosin yellow and methyl orange using zeolite Y
Researchers synthesized zeolite Y using an energy-efficient method that recycles waste heat from a chemical reaction instead of external heating, then tested it as an adsorbent to remove two industrial dyes from water. The zeolite effectively removed both dyes, with adsorption best described by standard mathematical models, indicating its potential as a low-cost material for treating dye-contaminated wastewater.
Preparation and Characterization of Chabazite from Construction Waste and Application as an Adsorbent for Methylene Blue
Researchers converted construction waste into a mineral adsorbent called chabazite that effectively removes the dye methylene blue from water. Developing adsorbents from waste materials for water treatment could also address the co-contaminants that sorb onto microplastics in polluted water.
A Symmetry Concept for the Self-Assembly Synthesis of Mn-MIL-100 Using a Capping Agent and Its Adsorption Performance with Methylene Blue
Researchers synthesized a metal-organic framework material capable of adsorbing the dye methylene blue from water. Adsorptive materials like this could potentially also capture microplastics and plastic-associated dyes from wastewater before they reach aquatic ecosystems.
Amine-Terminated Modified Succinic Acid-Magnetite Nanoparticles for Effective Removal of Malachite Green Dye from Aqueous Environment
Researchers synthesised amine-terminated succinic acid-modified magnetite nanoparticles (MSA@TEPA) as an adsorbent for malachite green dye removal from aqueous solution, characterising the material by SEM, FTIR, zeta potential, TGA, and XRD. The nanocomposite achieved 97.74% removal efficiency with a Langmuir maximum adsorption capacity of 282.65 mg/g, following pseudo-second-order kinetics through electrostatic interaction and hydrogen bonding, and retained good efficiency over five reuse cycles.
Magnetite/MXene (Fe3O4/Ti3C2) Nanocomposite as a Novel Adsorbent for Environmental Remediation of Malachite Green Dye
Researchers developed a novel magnetite/MXene nanocomposite adsorbent for removing malachite green dye from water. The material showed effective adsorption properties and could be magnetically separated after use, demonstrating potential as an environmental remediation tool for organic pollutants in contaminated water sources.