Attachment of Microbes on Mineral Surface in Microbial Weathering and Its Significance
LU Xian-cai 1 , TU Bo-wen 2 , ZHU Ting-ting 1 , LI Juan 1 , WANG Zhao-hua 1 , ZHOU Yue-fei 1,3 , ZHAO Xing-qing 1 , LU Jian-jun 1 , WANG Ru-cheng 1 1. State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China; 2. College of Medicine, Nanjing University, Nanjing 210093, China; 3. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
Microbial weathering is one of the most important supergene processes, closely connected with global cycle of several elements and local environmental contamination, such as heavy metal contamination in mine districts. It is widely found that the attachment of microorganism on mineral surface can remarkably enhance the weathering of minerals. In this paper, the apparent weathering rate and surface erosion are discussed based on the brief summary of the characteristics of surface attachment of microbes on minerals. The driving force of the attaching behavior and its influence factors are preliminarily analyzed, and the investigation on the microbe-mineral interface is emphasized. Transdisciplinary studies in molecular biology, surface mineralogy and micro-ecology are necessary to disclose the mechanism of microbial weathering at molecular level, which is helpful for evaluating the geochemical significance of bio-weathering and the regulation ability of local environmental issues.