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Enhanced Dechlorination of the Herbicide Acetochlor by an Anaerobic Consortium via Sulfate Acclimation
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2024-09-10 , DOI: 10.1021/acs.jafc.4c03737 Junwei Liu 1 , Xuemei Zhang 1 , Xinyue Yang 1 , Xuan Zhang 2 , Dandan Pan 1 , Qing X Li 3 , Jian He 2 , Xiangwei Wu 1
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2024-09-10 , DOI: 10.1021/acs.jafc.4c03737 Junwei Liu 1 , Xuemei Zhang 1 , Xinyue Yang 1 , Xuan Zhang 2 , Dandan Pan 1 , Qing X Li 3 , Jian He 2 , Xiangwei Wu 1
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Acetochlor residues can contaminate anoxic habitats where anaerobic microbial transformation dominates. Herein, a highly efficient anaerobic acetochlor–degrading consortium ACT6 was enriched using sulfate and acetochlor as selection pressures. The acclimated consortium ACT6 showed an 8.7-fold increase in its ability to degrade acetochlor compared with the initial consortium ACT1. Two degradation pathways of acetochlor were found: reductive dechlorination and thiol-substitution dechlorination in the chloroacetyl group, in which the latter dominated. Acclimation enhanced the abundances of Desulfovibrio, Proteiniclasticum, and Lacrimispora from 0.7 to 28.0% (40-fold), 4.7 to 18.1% (4-fold), and 2.3 to 12.3% (5-fold), respectively, which were positively correlated with sulfate concentrations and acetochlor degradation ability. Three acetochlor-degrading anaerobes were isolated from the acclimated consortium ACT6, namely Cupidesulfovibrio sp. SRB-5, Proteiniclasticum sp. BAD-10, and Lacrimispora sp. BAD-7. This study provides new insights into the anaerobic catabolism of acetochlor and the anaerobic treatment of acetochlor in wastewater.
中文翻译：
厌氧菌群通过硫酸盐驯化增强除草剂乙草胺的脱氯
乙草胺残留物会污染厌氧微生物转化占主导地位的缺氧栖息地。在此，使用硫酸盐和乙草胺作为选择压力，富集了高效厌氧乙草胺降解菌群 ACT6。与最初的联合体 ACT1 相比，适应环境的联合体 ACT6 降解乙草胺的能力提高了 8.7 倍。发现乙草胺有两种降解途径：氯乙酰基中的还原脱氯和硫醇取代脱氯，其中后者占主导地位。驯化使Desulfovibrio 、 Proteiniclasticum和Lacrimispora的丰度分别从 0.7% 至 28.0%（40 倍）、4.7% 至 18.1%（4 倍）和 2.3 至 12.3%（5 倍），与硫酸盐浓度和乙草胺降解能力。从适应的菌群 ACT6 中分离出三种乙草胺降解厌氧菌，即Cupidesulfovibrio sp。 SRB-5，蛋白碎屑属sp。 BAD-10 和泪孢属sp。坏-7。该研究为乙草胺的厌氧分解代谢和废水中乙草胺的厌氧处理提供了新的见解。
更新日期：2024-09-10
中文翻译：
厌氧菌群通过硫酸盐驯化增强除草剂乙草胺的脱氯
乙草胺残留物会污染厌氧微生物转化占主导地位的缺氧栖息地。在此，使用硫酸盐和乙草胺作为选择压力，富集了高效厌氧乙草胺降解菌群 ACT6。与最初的联合体 ACT1 相比，适应环境的联合体 ACT6 降解乙草胺的能力提高了 8.7 倍。发现乙草胺有两种降解途径：氯乙酰基中的还原脱氯和硫醇取代脱氯，其中后者占主导地位。驯化使Desulfovibrio 、 Proteiniclasticum和Lacrimispora的丰度分别从 0.7% 至 28.0%（40 倍）、4.7% 至 18.1%（4 倍）和 2.3 至 12.3%（5 倍），与硫酸盐浓度和乙草胺降解能力。从适应的菌群 ACT6 中分离出三种乙草胺降解厌氧菌，即Cupidesulfovibrio sp。 SRB-5，蛋白碎屑属sp。 BAD-10 和泪孢属sp。坏-7。该研究为乙草胺的厌氧分解代谢和废水中乙草胺的厌氧处理提供了新的见解。
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