Biogeochemical factors of formation ferriferous biominerals

Abstract

In the paper we report experimental study of biomineralization processes occurring on biogeochemical barriers involving community of bacteria from natural groundwater . After 2-years experiment, the formation of a crystalline iron-containing mineral occurred in the contact zone of zeolite-sand with the introduction of biomass of iron bacteria. The experimental samples were examined using scanning electron microscopy and X-ray diffractometry. Analysis of the magnetic properties of biomineral shown presence of various structures of the iron hydroxides, including goethite and lepidocrocite. It is established that the formation of the structure of biominerals depends on the nature of the development of bacterial biofilms in the pore space and the intensity of accumulation of different elements in their polymer matrix.

Keywords

• биогеохимические процессы
• биоминерализация
• железомарганцевые бактерии
• гетит
• biogeochemical process
• biomineralization iron-manganese bacteria
• gethite