Novel iron activated biochars (FA-BCs) were prepared via simultaneous pyrolysis and activation of FeCl₃-pretreated bermudagrass (BG) for removing microcystin-LR (MC-LR) in aqueous solution. Compared to the raw BC (without activation), the surface area and adsorption capacity of FA-BC at iron impregnation ratio of 2 (2 g FeCl₃/g BG) were enhanced from 86 m²/g and 0.76 mg/g to 835 m²/g and 9.00 mg/g. Moreover, FA-BC possessed various iron oxides at its surface which provided the catalytic capacity for regeneration of MC-LR spent FA-BC and magnetic separation after the MC-LR adsorption. Possible mechanisms for the MC-LR adsorption onto FA-BC would include electrostatic attraction, π⁺-π, hydrogen bond, and hydrophobic interactions. The detailed adsorption studies indicated mainly chemisorption and intra-particle diffusion limitation would participate in the adsorption process. The thermal regeneration at 300 °C kept high regeneration efficiency (99–100%) for the MC-LR spent FA-BC during four cycles of adsorption-regeneration. In addition, the high regeneration efficiency (close to 100%) was also achieved by persulfate oxidation-driven regeneration. FA-BC also exhibited high adsorption capacity for the MC-LR from the real lake water to meet the MC-LR concentration below 1 μg/L as a safe guideline suggested by WHO.

通过同时热解和活化FeCl ₃预处理的百慕大草（BG）来制备新型的铁活化生物炭（FA-BCs），以去除水溶液中的微囊藻毒素-LR（MC-LR）。与未处理的BC相比（未活化），FA-BC的表面积和吸附能力在铁的浸渍比为2（2 g FeCl ₃ / g BG）时从86 m ² / g和0.76 mg / g提高到835 m ² / g和9.00 mg / g。此外，FA-BC在其表面具有各种氧化铁，这为MC-LR用过的FA-BC的再生和MC-LR吸附后的磁分离提供了催化能力。MC-LR吸附到FA-BC上的可能机制包括静电吸引π ⁺-π，氢键和疏水相互作用。详细的吸附研究表明，化学吸附和颗粒内扩散限制将主要参与吸附过程。在四个吸附再生循环中，MC-LR废FA-BC的300°C热再生保持了较高的再生效率（99–100％）。此外，通过过硫酸盐氧化驱动的再生，还实现了高再生效率（接近100％）。FA-BC还显示出对真实湖水中MC-LR的高吸附能力，以满足世界卫生组织建议的安全指南，即MC-LR浓度低于1μg/ L。