article · Environmental Technology & Innovation
A sustainable method has been developed to produce magnetic hybrid alumina nanoparticles designed for the removal of copper ions from wastewater. Physical and chemical characterisation confirms a rough, porous morphology, strong thermal stability, and magnetic characteristics that enable straightforward separation after treatment. Under optimal conditions at pH 3.5 and an initial copper concentration of 30 mg/L, the material achieves an adsorption capacity of 52.5 mg/g. The uptake process adheres to a pseudo-second-order kinetic model and aligns closely with the Langmuir isotherm model, indicating monolayer coverage driven largely by chemisorption and electrostatic interactions. The combination of high adsorption capacity, eco-friendly synthesis, and rapid magnetic retrieval presents a viable approach for mitigating heavy metal contamination in wastewater systems.
Copper contamination in wastewater presents severe environmental and public health risks. Developing sustainable, high-capacity adsorbents that can be recovered magnetically simplifies industrial water cleanup. This approach reduces processing complexity and operational overheads by allowing spent materials to be gathered rapidly using magnetic fields, supporting cleaner effluent discharge and more sustainable environmental remediation.
The material is intended for wastewater treatment operators and industrial facilities managing heavy metal discharge, specifically copper. Its magnetic behaviour addresses a key processing hurdle by facilitating rapid separation and retrieval. As the data relies on laboratory synthesis and batch equilibrium testing, the technology is currently early-stage research that requires testing in continuous flow systems and real-world multi-pollutant effluents before industrial use.
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This study introduces a novel method for producing magnetic hybrid alumina nanoparticles phase (MHAl-NPsP) tailored specifically for efficient copper (II) ion removal from wastewater. The synthesized MHAl-NPsP underwent comprehensive characterization, including Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) revealing its rough and porous surface morphology, X-ray diffraction (XRD) analysis, transmission electron microscopy (TEM) analysis, BET analysis for surface area measurements, TGA analysis confirming high thermal stability, vibrating sample magnetometry (VSM) analysis confirming successful synthesis through detection of magnetic properties, and X-ray Photoelectron Spectroscopy (XPS) analysis. Remarkably, MHAl-NPsP demonstrated an exceptional adsorption capacity of 52.5 mg/g under optimized conditions of pH 3.5 and an initial copper concentration of 30 mg/L, surpassing previous results significantly. Detailed investigation into adsorption kinetics revealed a pseudo-second-order model, suggesting a predominant chemisorption mechanism. Moreover, analysis using the Langmuir isotherm model showed excellent fitting with an R² value of 0.994, indicating monolayer coverage as the primary adsorption mode. Notably, pH dependency studies indicated enhanced adsorption efficiency with decreasing pH levels, highlighting the significant role of electrostatic interactions. This study underscores the effectiveness and environmental sustainability of the green synthesis approach employed for MHAl-NPsP. Utilizing their magnetic properties, MHAl-NPsP facilitate easy separation and retrieval of adsorbed copper ions, making them highly promising for practical applications in wastewater treatment. The findings advocate for the development of eco-friendly adsorbents to tackle water pollution challenges, providing promising solutions for sustainable environmental remediation.
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DOI: 10.1016/j.eti.2024.103628
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