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Rice husk coated with copper oxide nanoparticles for 17α-ethinylestradiol removal from an aqueous solution: adsorption mechanisms and kinetics

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Abstract

The 17 α-ethinylestradiol (EE2) adsorption from aqueous solution was examined using a novel adsorbent made from rice husk powder coated with CuO nanoparticles (CRH). Advanced analyses of FTIR, XRD, SEM, and EDSwere used to identify the classification parameters of a CRH-like surface morphology, configuration, and functional groups. The rice husk was coated with CuO nanoparticles, allowing it to create large surface area materials with significantly improved textural qualities with regard to functional use and adsorption performance, according to a detailed characterization of the synthesized materials. The adsorption process was applied successfully with elimination effectiveness of 100% which can be kept up to 61.3%. The parameters of adsorption were affecting the adsorption process significantly. Thermodynamic data stated that the process of adsorption was endothermic, spontaneous, chemisorption and the molecules of EE2 show affinity with the CRH. It was discovered that the adsorption process controlled by a pseudo-second–order kinetic model demonstrates that the chemisorption process was controlling EE2 removal. The Sips model is regarded as optimal for representing this practice, exhibiting a significantly high determination coefficient of 0.948. This coefficient implies that the adsorption mechanism indicates the occurrence of both heterogeneous and homogeneous adsorption. According to the findings, biomass can serve as a cheap, operative sorbent to remove estrogen from liquified solutions.

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Acknowledgements

We would like to express our gratitude for the technical support provided by the University of Baghdad-College of Engineering during this work. We also would like to thank the Universiti Kebangsaan Malaysia for the support through Dana Impak Perdana with grant number DIP-2021-008.

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Hasanain Saad Alhares: investigation, writing-original draft preparation. Qahtan Adnan Ali: funding. Mohanad J. M-Ridha: review, supervision and editing. Hawraa R. Bohan: investigation. Sabah J. Mohammed: conceptualization, interpreting the results, and editing. Khalid M. Abed: conceptualization, supervision and review. Mohammed Ali A. Shaban: editing and software. Hassimi Abu Hasan: conceptualization and review.

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Correspondence to Sabah J. Mohammed.

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Alhares, H.S., Ali, Q.A., Shaban, M.A.A. et al. Rice husk coated with copper oxide nanoparticles for 17α-ethinylestradiol removal from an aqueous solution: adsorption mechanisms and kinetics. Environ Monit Assess 195, 1078 (2023). https://doi.org/10.1007/s10661-023-11689-6

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