article · Journal of Inorganic and Organometallic Polymers and Materials
This study investigates the removal of malachite green dye from water using two synthesized nanomaterials: copper ferrite nanoparticles and a copper ferrite/calcium alginate composite. Both materials were prepared and structurally analysed using various physicochemical and morphological techniques. The researchers tested the effects of operational variables, including pH, temperature, initial dye concentration, catalyst dose, shaking time, ionic strength, and UV light power. The copper ferrite/calcium alginate composite demonstrated superior performance compared to the plain nanoparticles, reaching an adsorption capacity of 297.62 mg/g at 40 °C. When tested under UV light, the composite achieved an 89.9 percent degradation of the dye using 1.0 g/L of material at 33 W. The processes were confirmed to be spontaneous, endothermic, and well described by standard adsorption and kinetic degradation models.
Malachite green is a hazardous synthetic dye often present in industrial wastewater. Finding efficient ways to remove it is vital for environmental protection and clean water management. This research demonstrates an effective hybrid material capable of both capturing and breaking down this toxic contaminant using adsorption and light-driven catalytic degradation.
This work could enable dual-action water treatment systems that combine physical adsorption with ultraviolet photocatalytic breakdown of industrial dyes. Potential users include industrial wastewater treatment operators, particularly in textiles and aquaculture. The research is at an early laboratory stage, having focused on parameter optimisation and material characterisation at bench scale.
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Abstract In this article, the effectiveness of two different application methods (photocatalytic degradation and adsorption) onto the created solid nanomaterials for the removal of malachite green (MG) was investigated. Copper ferrite nanoparticles (CF) and copper ferrite/calcium alginate composite (CG) were synthesized as two studied solid samples. By using XRD, TGA, FTIR, DRS, nitrogen adsorption/desorption isotherm, pH PZC , SEM, and TEM, the physicochemical and morphological properties of the solid samples were tested. Sample dose, pH, initial MG concentration, shaking time, ionic strength, UV light power, and temperature were the key experimental parameters that were established. The obtained results demonstrated that at 40 °C, CG reached a greater adsorption capacity (297.62 mg/g). The spontaneous, endothermic, and advantageous adsorption process of MG was proved by the best fitting of pseudo-second order, Elovich, intra-particle diffusion, Langmuir, Dubinin-Radushkevich, and Temkin models onto all the produced materials. The maximum percentage of MG degradation by CG (89.9%) was accomplished by utilizing 1.0 g/L of catalyst mass, an initial MG concentration of 10 mg/L, and 33 W. Arrhenius and Eyring–Polanyi models well applied the MG photodegradation onto the catalyst surface.
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DOI: 10.1007/s10904-023-02806-6
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