微生物所协同的天然金红石日光催化作用研究

本文揭示了自然界中可能存在的一种新的矿物和微生物交互作用形式，即微生物通过生物电化学作用参与到半导体 矿物的日光催化作用过程中。模拟日光光源下“产电”微生物与天然半导体矿物金红石交互实验结果显示，金红石的光催 化作用促进了矿物端元的反应速率，提高了电子在微生物和矿物之间的转移效率，使微生物电子传递链末端电子能量得到 提升。二者协同作用可提高微生物或半导体矿物单独作用时对污染物如Cr(Ⅵ)的还原处理效果。该研究为环境污染治理提 供了一种矿物与微生物协同作用新理念。

Natural Rutile-Involved Photocatalytic Process Assisted by Microorganism

A novel  interactive manner between minerals and microorganisms was proposed  in  this study,  i.e. microorganisms participate in the semiconducting mineral photocatalytic process via a bioelectrochemical reaction. The experimental results showed that in the interactive system including simulated sunlight, “electricigens” and natural rutile, the photocatalysis of natural rutile improved  the cathodic reaction kinetics, promoted  the electron  transfer efficiency and elevated  the electron energy of  the end of the microbial electron transfer chain. The synergistic interaction between microorganism and semiconducting minerals enhanced the  reduction efficiency of pollutants such as Cr(Ⅵ). The proposed  interactive pathway would be expected as an alternative effective technology for future wastewater treatment.