Herbicides are commonly used globally. However, residual herbicides in soils for ages often result in phytotoxicity and serious yield loss to subsequent crops. In this paper, the multi-walled carbon nanotubes (MWCNTs) were utilized to amend the herbicide polluted soil, and the adsorption performance of herbicides to MWCNTs amended soil was studied. Results indicate efficient alleviation of herbicide-induced phytotoxicity to rice and tobacco due to MWCNTs amendment. When 0.4% MWCNTs were applied, the concentration of sulfentrazone that inhibited the same rice height by 50% (IC₅₀) increased to more than 3 times that of pure soil. When the MWCNTs were used to alleviate the phytotoxicity of quinclorac to tobacco, the MWCNTs not only alleviated the phytotoxicity of quinclorac but also promoted the growth of tobacco. The MWCNTs amended soil significantly increased the adsorption of herbicide to soil than biochar. The soil microbial analysis shows that MWCNTs had no significant effect on soil microbial community diversity, but the long-term exposure to MWCNTs could change the structure of the soil microbial community. Above all, our results highlighted the potential implication of the MWCNTs to ensure crop production by promoting crop growth and reducing the residual bioavailability of herbicides.

除草剂在全球范围内普遍使用。然而，土壤中长期残留的除草剂往往会对后续作物造成植物毒性和严重的产量损失。本文利用多壁碳纳米管(MWCNTs)对除草剂污染土壤进行改性，研究了除草剂对MWCNTs改性土壤的吸附性能。结果表明，由于 MWCNTs 的修正，可以有效减轻除草剂对水稻和烟草的植物毒性。当施用 0.4% MWCNTs 时，抑制相同稻高的磺胺嘧啶浓度降低 50%（IC ₅₀)增加到纯土的3倍以上。当用多壁碳纳米管减轻五氯喹啉对烟草的药害作用时，不仅减轻了五氯苯酚的药害，而且促进了烟草的生长。与生物炭相比，MWCNTs 改良土壤显着增加了除草剂对土壤的吸附。土壤微生物分析表明，多壁碳纳米管对土壤微生物群落多样性没有显着影响，但长期接触多壁碳纳米管会改变土壤微生物群落的结构。最重要的是，我们的结果强调了 MWCNT 通过促进作物生长和降低除草剂的残留生物利用度来确保作物生产的潜在意义。