Green collagen fiber-based organic-inorganic hybrid membrane material for the effective removal of p-arsanilic acid

Efficient removal of p -arsanilic acid ( p -ASA) from contaminated water is crucial for mitigating arsenic contamination. In this study, a membrane adsorbent named CFM-Zn is developed by retanning Zn on a collagen fiber membrane (CFM). This development leverages the unique physicochemical properties of CFM and the strong affinity of Zn for p -ASA. The membrane is composed entirely of green, low-carbon, and recyclable materials, achieving sustainable removal of p -ASA and embodying the concept of using waste to treat waste for environmental recovery. Remarkably, it exhibits an ultra-high capacity of up to 515.46 mg·g −1 . Additionally, CFM-Zn demonstrates moderate reusability, with effectiveness maintained for at least five cycles. This study could advance the development of bio-based materials for water pollutant removal, expand the applications of leather waste, and significantly promote environmental purification and resource recycling.