Reactive Red 195 elimination by efficient CuFe2O4/CuS green composite adsorbent

This study presented a facile and sustainable method to synthesize a novel magnetic composite of CuFe2O4/CuS via a simple green route. Alhagi pseudalhagi extract was effectively employed as a bio-reductant and capping agent for the composite fabrication. Then, the adsorption effectiveness of the CuFe2O4/CuS nanocomposite was screened for the decontamination of 20 mg L−1 Reactive Red 195 (RR195) dye in aqueous environment. Batch adsorption experiments were systematically deployed to comprehend the impact of various operational parameters on the RR195 removal efficiency. The best uptake RR195 rate (95%) was maintained under the optimized operational conditions, including a pH value of 3.0, an adsorbent dosage of 1.5 g L−1, an initial RR195 concentration of 20 mg L−1, a contact time of 200 min, and a temperature of 20 °C. The adsorption Kinetics obeyed a pseudo-second-order kinetic model (R2 = 0.999), and the attained equilibrium outcomes were best elucidated by the Langmuir isotherm model (R2 = 0.965), singing a homogeneous and monolayer adsorption mechanism. Thermodynamic investigations revealed that the adsorption process is appropriate, spontaneous and endothermic, with ∆H° and ∆S° values of 60.99 kJ mol−1 and 275.409 J mol K−1, respectively. In vitro, the reusability analysis conformed that the as-constructed adsorbent consistently achieved a suitable stable RR195 rate with only a 28% reduction in the elimination efficiency after twelve consecutive runs. Eventually, the acquired findings manifested a robust potential of the CuFe2O4/CuS composite for the adsorption effectiveness, proving it a sustainable and promising for the decontamination of RR195 from water environments.