Study On The Effect Of Polysaccharide And Protein Secreted By Microorganism Modulating The Biomineralization Of Goethite

At present, the applied research projects of iron minerals in the environment engineering have made significant progress, there are broad prospects for development. Iron minerals formed by Biological mineralization for the soil restoration, compared with other rehabilitation technologies, had the advantages of low-cost, no secondary pollution, reflect the characteristics of natural purification;In addition, the iron oxide reinstate the role of bacteria and the formation of the iron minerals than its surface large adsorption characteristics of a good performance in Concentrations, heavy metals and heavy metal waste recycling processing applications have broad prospects for the current study has achieved certain results.Iron oxides, hydroxide widely distributed in nature. In the soil, water, modern sediments, hematite, needles is the main iron ore minerals. Rail minerals change their host environment greater impact. In the soil, sediment, mineral waters widespread iron oxide reinstate the role and dissolved, thus the decomposition of organic matter, the release of trace elements, the physical chemical properties such as soil have a direct impact. Widespread iron bacteria itself to the role of Concentrations, and allows a variety of ferrous oxide reduction in the role and dissolved minerals precipitate role in the formation of different iron minerals and mineral nature of the changes significantly affected the soil and water geochemical characteristics. In natural systems, bacteria and minerals interact is widespread, but also for their environment is an important role.All through training and micro-organisms Concentrations cast iron minerals mineralization experiments in a normal atmosphere temperature neutral conditions simulated natural iron biological mineralization experiments. Experimental results analysis shows : bacterial protein secretion and polysaccharide by regulating ion concentration of mineralization spaces to control nuclear-biological crystals, sedimentation and growth, to control the use of fossil organic patterns, sequencing, orientation and internal structure, different polysaccharide and protein have different reactive functional group, able to act as a point of nuclear spaces attract Fe3+ which occurred allocation and the role of organic matter in the formation since assembly into the molecular structure of nuclear crystallization, and a certain inclination to grow. Its causes and inorganic mineral geochemical characteristics totally different.FeOOH crystals in the process of formation, but also by different anion molysite the impact of its crystal structure and crystallization speed There is a big difference.Cl- contain the molysite easily generated alpha -FeOOH on different anion growth of FeOOH have some influence and control. In addition, different elements of the media have certain effects FeOOH crystallization, and structure effects of different crystallization media have certain differences.