| 毛鹏飞,李文杰,Tatiana Minkina,高彦征.固定化菌剂作用下土壤中塑化剂-Cd赋存形态转变规律及污染风险评估[J].农业环境科学学报,2026,45(9):2254-2262. |
| 固定化菌剂作用下土壤中塑化剂-Cd赋存形态转变规律及污染风险评估 |
| Transformation rules of phthalate-Cd speciation in soil under the action of immobilized bacterial agents and pollution risk assessment |
| 投稿时间：2025-10-21 |
| DOI：10.11654/jaes.2025-0947 |
| 中文关键词: 邻苯二甲酸酯 Cd 固定化菌剂 复合污染修复 生态风险评估 |
| 英文关键词: phthalate esters Cd immobilized bacterial agents remediation of combined pollution ecological risk assessment |
| 基金项目:国家重点研发计划项目（2023YFE0110800）；国家自然科学基金项目（U22A20590，42430703） |
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| 中文摘要: |
| 本研究以巯基改性蒙脱石-玉米秸秆生物炭复合材料为固定化载体，结合高效降解邻苯二甲酸酯（PAEs）类塑化剂功能菌群，制备固定化菌剂。针对岩溶区农田PAEs和Cd复合污染土壤，采用温室盆栽试验，探究菌剂对PAEs和Cd协同修复效能及PAEs和Cd赋存形态转化的影响，并进行复合污染生态风险评估。结果表明，固定化菌剂具有高效的PAEs消减和Cd钝化能力，在棕色石灰土、黑色石灰土和红色石灰土3种土壤中对PAEs的消减率分别为68.35%、65.51%和67.53%，均显著高于对照处理。同时，固定化菌剂促进了重金属Cd从酸可提取态和可还原态向可氧化态和残渣态转化。此外，菌剂对蔬菜具有明显的促生作用。生态风险评估发现目标污染物的环境风险等级呈现显著降低趋势，从原来的中度生态危害程度降至轻微生态危害程度。这得益于固定化菌剂促进污染物的赋存形态发生转化，使其生物有效性显著降低，进而导致复合污染的环境风险等级下调。研究表明，固定化菌剂对PAEs和Cd复合污染物具有良好的去除或稳定化效果，成功实现了环境风险等级的降低。 |
| 英文摘要: |
| In this study, a thiol-modified montmorillonite-corn stalk biochar composite material was used as the immobilization carrier, combined with a highly efficient functional bacterial community for degrading phthalate ester（PAEs） plasticizers, to prepare an immobilized bacterial agent. A greenhouse pot experiment was conducted on PAEs and Cd co-contaminated soil in karst areas to investigate the co-remediation efficiency of the bacterial agent on PAEs and Cd and its influence on the transformation of PAEs and Cd speciation, and to conduct an ecological risk assessment of the co-contamination. The results showed that the immobilized bacterial agent had a highly efficient ability to reduce PAEs and immobilize Cd. The reduction rates of PAEs in brown rendzina, rendizina and terra rossa were 68.35%, 65.51% and 67.53% respectively, which were significantly higher than those of the control treatment. At the same time, it promoted the transformation of heavy metal Cd from acid-extractable and reducible states to oxidizable and residual states. In addition, the bacterial agent had a significant promoting effect on vegetable growth. The ecological risk assessment found that the environmental risk level of the target pollutants showed a significant downward trend, from the original moderate ecological hazard level to the slight ecological hazard level. This was due to the fact that the immobilized bacterial agent promoted the transformation of pollutant speciation, significantly reducing its bioavailability, and thus led to a reduction in the environmental risk level of the co-contamination. In conclusion, the immobilized bacterial agent had a good removal or stabilization effect on PAEs and Cd co-contaminants, successfully achieving a reduction in the environmental risk level. |
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