Abstract In this work, P. chrysogenum strain F1-ferrihydrite composites (PFC) were applied to the bioremediation of polluted mimic wastewater with high concentration (50–500 mg/L) of arsenic. An interesting phenomenon was discovered that the PFC was formed in situ in the process of removal of As(III), which can greatly improve their practical application in separation and reutilization. The results showed that optimum removal efficiency achieved 81.23% for As(III) at an initial concentration of 100 mg/L that also could be up to 75.00% at 200 mg/L with composite sorbent PFC. According to the adsorption isotherms and kinetics experiments, the adsorption reaction included both physical adsorption and chemical adsorption. The formation of composite PFC significantly promoted the sorption of As(III) ion between biomass and ferrihydrite from aqueous. The adsorption rates and capacities for arsenic were both enhanced markedly than biomass and ferrihydrite individually as well. Adsorption-desorption experiment indicated PFC maintained to a dominant with 74.47% of removal efficiency over 3 cycles. This research demonstrated that PFC has great potential in removing high concentration of As(III) from wastewater.

中文翻译：

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P. chrysogenum F1菌株与水铁矿在水中合成除砷复合吸附剂

摘要 在这项工作中，P. chrysogenum 菌株 F1-水铁矿复合材料 (PFC) 被应用于高浓度 (50–500 mg/L) 砷污染的模拟废水的生物修复。发现了一个有趣的现象，即在去除 As(III)的过程中原位形成了 PFC，这可以极大地提高其在分离和再利用方面的实际应用。结果表明，初始浓度为 100 mg/L 时，As(III) 的最佳去除效率达到 81.23%，使用复合吸附剂 PFC 时，初始浓度为 200 mg/L 时可达 75.00%。根据吸附等温线和动力学实验，吸附反应包括物理吸附和化学吸附。复合 PFC 的形成显着促进了生物质和水铁矿之间从水中吸附 As(III) 离子。对砷的吸附速率和容量都比单独的生物质和水铁矿显着提高。吸附-解吸实验表明，PFC 在 3 个周期内以 74.47% 的去除效率保持主导地位。该研究表明，PFC 在去除废水中高浓度的 As(III) 方面具有巨大潜力。