中国环境科学

作者：王贺飞, 沈可, 张文康, 宋瑶, 任冲飞, 杨晨, 高彦征

单位：1. 吉林大学, 地下水资源与环境教育部重点实验室, 吉林 长春 130021;2. 南京农业大学资源与环境科学学院, 江苏 南京 210095

关键词：碳量子点,2,2’-二硝基联苯,奥奈达希瓦氏菌,影响因素

基金：地下水资源与环境教育部重点实验室开放课题项目(202207005KF);国家自然科学基金项目(42207025);江苏省基础研究计划项目(BK20221025)

Shewanella, which is widely presented in soil, can reductively transform a variety of pollutants through extracellular electron transport pathways. Carbon quantum dots (CQDs) were produced from biochar through oxidation by nitric acid, and the the effectiveness and mechanism of CQDs to regulate the reduction of 2,2’-dinitrobiphenyl by the model microorganism (S. oneidensis MR-1) were studied. The produced CQDs were spherical with a particle size of 1.5~4nm, and the surface was rich in oxygen-containing functional groups, which were active for electron transfer. Mtr pathway was the main electron transport pathway for the reduction of 2,2’-dinitrobiphenyl by S. oneidensis MR-1, and SirCD was also involved in the reduction. CQDs can promote the electron transport in the reduction of 2,2’-dinitrobiphenyl by S. oneidensis MR-1, decrease the toxic effect of the pollutants on bacteria, thus improving the reduction efficiency. Goethite prevented reduction of 2,2’-dinitrobiphenyl by S. oneidensis MR-1, which can be alleviated by CQDs. Humic acid and CQDs promoted the reduction of 2,2’-dinitrobiphenyl by S. oneidensis MR-1.

来源：2024年第11期

《中国环境科学》期刊编辑部

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