生物炭@微纳米零价铁的制备及钝化土壤中As的实验研究
Experimental Study on Preparation of BC@MNZVI and Passivation of As in Soil
DOI: 10.12677/HJSS.2023.112007, PDF,    科研立项经费支持
作者: 袁语霜：江西省景德镇生态环境监测中心，江西 景德镇；从军军, 朱海杰, 宁高朋, 徐 娟, 成 岳*：景德镇陶瓷大学材料科学与工程学院，景德镇 江西；袁峰平：景德镇学院环境与生物工程学院，江西 景德镇
关键词: 生物炭；纳米零价铁；As；吸附；土壤修复；Biochar； Nano Zero-Valent Iron； As； Adsorption； Soil Remediation
摘要: 本研究生物炭@微纳米零价铁(BC@MNZVI)去除模拟含砷土壤中的砷，在烧制生物炭过程中用正交方法研究了生物炭制备的最佳配比，通过XRD、TEM、FT-IR、BET对BC@MNZVI进行了形貌表征分析及组成结构分析，研究制备的BC@MNZVI对土壤中As的处理效果，结果表明，分布在生物炭载体上的球形亮小颗粒为NZVI颗粒，呈球形，粒径大多小于100 nm，表明生物炭载体表面和孔中存在纳米级的零价铁颗粒，而且集聚较少。通过比较分析对砷的去除率，结合最终的数据以及分析可以得出生物炭负载纳米零价铁在对砷污染土壤处理60天后的处理效率可达到58.65%，相比加入还原性铁粉的去除率54.13%要高，且可以看出土壤本身对砷具有一定的降解率。
Abstract: In this study, biochar@micro-nano zero-valent iron (BC@MNZVI) removed arsenic from simulated arsenic-containing soil, and the optimum ratio of biochar preparation was studied by orthogonal method during the process of burning biochar. XRD, TEM, FT-IR, BET BC@MNZVI Morphological characterization and composition and structure analysis were carried out BC@MNZVI. The results of the treatment effect on As in soil showed that the spherical bright small particles distributed on the BC@MNZVI particles, which were spherical, and the particle size was mostly less than 100 nm, indicating that there were NZVI in the surface and pores of the biochar carrier, and there was less agglomeration. By comparing and analyzing the removal rate of arsenic, combined with the final data and analysis, it can be concluded that the treatment efficiency of biocarbon-loaded ZVI nano-particles can reach 58.65% after 60 days of treatment of arsenic-contaminated soil, which is higher than the removal rate of 54.13% adding reducing iron powder, and it can be seen that the soil itself has this certain degradation rate of arsenic.
文章引用：袁语霜, 从军军, 朱海杰, 宁高朋, 袁峰平, 徐娟, 成岳. 生物炭@微纳米零价铁的制备及钝化土壤中As的实验研究[J]. 土壤科学, 2023, 11(2): 48-60. https://doi.org/10.12677/HJSS.2023.112007

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