生物污染
微生物
生物吸附
环境化学
细菌
化学
钙
碳酸钙
碳酸盐
吸附
降水
生物
生物化学
气象学
物理
有机化学
吸附
遗传学
膜
作者
Xiaoxia Liu,Gernot Zarfel,Renata van der Weijden,Willibald Loiskandl,Brigitte Bitschnau,Inez J.T. Dinkla,Elmar Fuchs,Astrid H. Paulitsch-Fuchs
出处
期刊:Water Research
[Elsevier]
日期:2021-09-01
卷期号:202: 117444-117444
被引量:9
标识
DOI:10.1016/j.watres.2021.117444
摘要
Drinking water plumbing systems appear to be a unique environment for microorganisms as they contain few nutrients but a high mineral concentration. Interactions between mineral content and bacteria, such as microbial calcium carbonate precipitation (MCP) however, has not yet attracted too much attention in drinking water sector. This study aims to carefully examine MCP behavior of two drinking water bacteria species, which may potentially link scaling and biofouling processes in drinking water distribution systems. Evidence from cell density evolution, chemical parameters, and microscopy suggest that drinking water isolates can mediate CaCO3 precipitation through previously overlooked MCP mechanisms like ammonification or biosorption. The results also illustrate the active control of bacteria on the MCP process, as the calcium starts to concentrate onto cell surfaces only after reaching a certain cell density, even though the cell surfaces are shown to be the ideal location for the CaCO3 nucleation.
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