College of Geography and Environment, Shandong Normal University, Jinan 250014, PR China; Dongying Institute, Shandong Normal University, Dongying 257092, Shandong, PR China.
College of Geography and Environment, Shandong Normal University, Jinan 250014, PR China.
Bioresour Technol. 2023 Oct;385:129417. doi: 10.1016/j.biortech.2023.129417. Epub 2023 Jun 28.
This study investigated the enhancement effect of zero-valent iron and static magnetic field on the pollutant removal and power generation of electroactive constructed wetland. As demonstration, a conventional wetland was systematically modified by introducing zero-valent iron and then a static magnetic field, leading to progressive increases in pollutant (namely NH-N and chemical oxygen demand) removal efficiencies. By introducing both zero-valent iron and a static magnetic field, the power density increased four-fold to 9.2 mW/m and the internal resistance decreased by 26.7% to 467.4 Ω. Notably, static magnetic field decreased the relative abundance of electrochemically active bacteria (such as Romboutsia), while significantly enhancing species diversity. The permeability of the microbial cell membrane was improved, leading to a reduction in activation loss and internal resistance, thereby enhancing power generation capacity. Results showed that the addition of zero-valent iron and the applied magnetic field were beneficial to the pollutants removal and bioelectricity generation.
本研究探讨了零价铁和静磁场对电活性人工湿地中污染物去除和发电的增强效果。为此，通过引入零价铁和静磁场，对传统湿地进行了系统的改进，从而逐步提高了污染物（即 NH-N 和化学需氧量）的去除效率。通过同时引入零价铁和静磁场，功率密度增加了四倍，达到 9.2 mW/m，内阻降低了 26.7%，至 467.4 Ω。值得注意的是，静磁场降低了电化学活性细菌（如 Rom-boutsia）的相对丰度，同时显著提高了物种多样性。微生物细胞膜的通透性得到改善，从而减少了激活损失和内阻，提高了发电能力。结果表明，添加零价铁和外加磁场有利于污染物的去除和生物电能的产生。
