Behavior and mechanism of perfluorooctane sulfonate (PFOS) removal from wastewater samples using bamboo powder biochar

文献类型： 外文期刊

第一作者： Liu, Yufei

作者： Liu, Yufei;Zhang, Anping;Sun, Jianqiang;Liu, Yuxue;Liu, Yufei;Liu, Yihuan;Yang, Chenghu;Wang, Yuying;Zhou, Hanghai;Yang, Shengmao;Tang, Jiangwu;Liu, Yuxue;Wang, Yuying;Yang, Shengmao;Liu, Yuxue

作者机构：

关键词： Emerging contaminants; PFASs; Carbon-based material; Adsorption behavior; Environmental remediation; Persistent free radicals

期刊名称：JOURNAL OF WATER PROCESS ENGINEERING （ 影响因子：6.7； 五年影响因子：6.7 ）

ISSN： 2214-7144

年卷期： 2025 年 70 卷

页码：

收录情况： SCI

摘要： Perfluorooctane sulfonate (PFOS) is an emerging organic pollutant that is prevalent in the environment. The high toxicity, bioaccumulation and environmental persistence of PFOS pose significant risks to ecosystems and human health, and remediation technologies are urgently needed. However, conventional treatment techniques have proven difficult, necessitating the development of more affordable alternatives to adsorbents. Biochar shows great potential as an inexpensive adsorbent for PFOS removal owing to its excellent pore structure, surface properties, and ability to generate persistent free radicals (PFRs). In this study, biochar is prepared from bamboo powder at 300, 500, and 700 degrees C (BP300, BP500, and BP700). BP500 showed a more developed pore structure, larger specific surface area, and higher PFR signals. The removal efficiency of PFOS on BP500 (49.45 %) was superior to that on BP300 and BP700. The influence of environmental factors (biochar dosage, pH, kinetics, isotherms, and inorganic anions) on the adsorption behavior of PFOS was determined. The removal of PFOS increased at low pH, reaching 63.77 % at pH 2, while the presence of inorganic anions in the solution inhibited PFOS removal by BP500. The presence of oxidants (H2O2 and S2O82- ) alongside BP500 in the solution improved PFOS removal efficiency. The oxidant added to biochar could degrade PFOS, as evidenced by the detection of F-, and the removal and degradation rates increased with the oxidant dosage. This study provides a new perspective for analyzing the mechanism of PFOS removal by biochar. In the future, the industrial-scale application of bamboo biochar for contaminant removal needs to be strengthened.

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