Toxicological Assessment of 17β-Estradiol and 17α-Ethinylestradiol After Adsorption in a Biomass Filter Associated with the Nanomaterial δ-FeOOH.

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Citation abstract

Emerging contaminants pose significant risks to ecosystems yet are not routinely included in standard monitoring or regulatory frameworks. Among these substances, endocrine disruptors such as β-estradiol and 17α-ethinylestradiol threaten both human and environmental health by interfering with metabolism, reproduction, and development across multiple species. These hormones are continuously released into the environment through excretion and improper disposal, and conventional water treatment processes are largely ineffective at removing them. As a result, they can accumulate in aquatic organisms and enter the human food chain. Recent studies have demonstrated that banana peel, Pleurotus ostreatus biomasses, and the nanomaterial δ-FeOOH are efficient, low-cost materials for the removal of toxic metals, suggesting their potential applicability for eliminating estrogenic compounds. Therefore, this study aimed to evaluate the removal of β-estradiol and 17α-ethinylestradiol using filters composed of banana peel and P. ostreatus biomass combined with δ-FeOOH. Hormone removal efficiency was assessed by LC-MS, and toxicity reduction was evaluated through bioassays. The results showed up to 100% removal of hormone concentrations and a significant decrease in sample toxicity, indicating that this filtration system represents a safe and effective alternative for removing organic contaminants from water.