零价铁改性生物炭微球的制备及其对水体中Cr（V）去除性能的研究

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关键词：零价铁；生物炭微球； Cr（M） 去除；界面还原-吸附协同作用中图分类号：X524文献标志码：ADOI：10.7652/xjtuxb202511004 文章编号：0253-987X（2025）11-0042-11

Abstract： To address the challenge of treating highly toxic Cr（M） contamination in water，the use of zero-valent iron-modified biochar microspheres （FeBCSA） for Cr（‰ ）removal is proposed. First，a three-dimensional porous cage-structured FeBCSA is prepared. Subsequently， its performance in removing Cr（M） from water is investigated，along with the effects of factors such as initial concentration，adsorption time， pH ，and coexisting ions on the removal performance. Finally，the material's properties are verified through XRD and XPS characterization，and the removal mechanism of Cr（M） ）by FeBCSA is analyzed. The results show that under conditions of pH=4. 06 and an initial Cr（M） concentration of 50mg⋅L-1 ，FeBCSA achieves a Cr（M） removal efficiency of 99.47% ，reducing the post-reaction Cr（M） concentration to 0.27mg⋅L-1 ，which is below the limit specified in the Integrated Wastewater Discharge Standard. FeBCSA exhibits significantly higher Cr（M） removal efficiency compared to non-crosslinked FeBC powder （88.88% ）and FeSA microspheres without bamboo-based biochar framework （ 60.06% ）．FeBCSA efficiently removes Cr（M） from water under acidic conditions，making it suitable for treating acidic Cr（M）. 1 containing wastewater. At pH=4. 06 ，it demonstrates both high efficiency and stability in Cr （VI）removal，maintaining a high removal rate even in the presence of different interfering ions. The efficiency of Cr（V） removal by FeBCSA is achieved through interface reductive-adsorption synergy. This study provides a green remediation material with both high performance and potential for engineering applications in Cr（M） -contaminated water treatment.

Keywords： zero-valent iron； biochar microspheres； Cr（U ）removal； interface reductive-adsorptionsynergy

铬（Cr是一种工业废水中常见的重金属元素。（剩余18344字）