Bensulfuron methyl (BSM) residues have caused serious yield reductions of sensitive crops. Chemical oxidation is an effective remediation technology, while it affects soil quality and subsequent agricultural activity, necessitating approriate improvement measures. So Fe2O3-Mn3O4 with excellent bimetallic synergistic effect was synthesized to activate peroxymonosulfate (PMS) for BSM degradation. The catalytic activity and influencing factors were systematically predetermined in water in view of soil remediation. Results showed Fe2O3-Mn3O4/PMS oxidized 99.3 % BSM within 60 min with the help of multi-reactive species and electron transfer. Meanwhile, Fe2O3-Mn3O4/PMS treatment exhibited technical feasibility in soil that 97.6 % BSM was degraded in 5 days under the low usages of Fe2O3-Mn3O4 (0.8 %) and PMS (0.15 %). Although Fe2O3-Mn3O4/PMS decreased BSM phytotoxicity and improved maize growth, a few gaps existed between the remediated group and uncontaminated group, including biomass, length, available potassium, organic matters, pH, redox potential (Eh) and sulfate content. The introductions of biochar and chitosan in remediated soils promoted growth, increased organic matters content, improved soil resistance to acidification and decreased Eh, alleviating the negative effects of Fe2O3-Mn3O4/PMS. Overall, the study provided new insights into the combination of Fe2O3-Mn3O4/PMS and biochar and chitosan in BSM-contaminated soil, achieving BSM degradation and improvements of soil quality and plant growth.

中文翻译：

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在受污染土壤中整合过氧一硫酸盐氧化和土壤改良剂的新策略：甲基苯嘧磺隆降解、土壤质量改善和玉米生长促进


甲基苯嘧磺隆 （BSM） 残留物已导致敏感作物严重减产。化学氧化是一种有效的修复技术，但它会影响土壤质量和随后的农业活动，因此需要采取适当的改进措施。因此，合成了具有优异双金属协同效应的 Fe2O3-Mn3O4 来激活过氧一硫酸盐 （PMS） 用于 BSM 降解。鉴于土壤修复，在水中系统地预先确定了催化活性和影响因素。结果显示，Fe2O3-Mn3O4/PMS 在多反应性物质和电子转移的帮助下，在 60 分钟内氧化了 99.3% BSM。同时，Fe2O3-Mn3O4/PMS 处理在土壤中表现出技术可行性，在 Fe2O3-Mn3O4 （0.8%） 和 PMS （0.15%） 的低用量下，97.6% BSM 在 5 天内降解。尽管 Fe2O3-Mn3O4/PMS 降低了 BSM 植物毒性并促进了玉米生长，但修复组和未污染组之间存在一些差距，包括生物量、长度、速效钾、有机质、pH 值、氧化还原电位 （Eh） 和硫酸盐含量。在修复土壤中引入生物炭和壳聚糖促进了生长，增加了有机质含量，提高了土壤对酸化的抵抗力并降低了 Eh，减轻了 Fe2O3-Mn3O4/PMS 的负面影响。总体而言，该研究为 Fe2O3-Mn3O4/PMS 与生物炭和壳聚糖在 BSM 污染土壤中的结合提供了新的见解，实现了 BSM 降解并改善了土壤质量和植物生长。