A recent study published in the Journal of Water Process Engineering explores the use of a novel biochar-based adsorbent, BIPGEM (Biochar-based Iron and Perlite-Integrated Green Environmental Media), for removing per- and polyfluoroalkyl substances (PFAS) from surface water. PFAS, known for their persistence and harmful effects on human health and the environment, are difficult to eliminate using conventional water treatment methods. BIPGEM was specifically tested for its ability to remove both long-chain PFAS, such as PFOA and PFOS, and short-chain PFAS like PFBA and PFBS.

In batch experiments, BIPGEM achieved over 98% removal efficiency for long-chain PFAS. A fixed-bed column test further demonstrated that BIPGEM effectively removed over 85% of PFOA and PFOS within 12 hours of treatment. The adsorbent’s performance can be attributed to biochar’s unique properties, including its large surface area, positive charge, and hydrophobic interactions with PFAS molecules.

Compared to other adsorbents like ZIFGEM, BIPGEM was more effective for both long-chain and short-chain PFAS removal. These results highlight biochar’s potential as a key component in PFAS treatment strategies. With PFAS increasingly being regulated, this research offers a promising solution to reduce PFAS levels in water, ensuring safer drinking water sources.