Тип публикации: статья из журнала
Год издания: 2010
Идентификатор DOI: 10.1061/(ASCE)EE.1943-7870.0000215
Ключевые слова: bacteria, concrete, Concrete corrosion, corrosion, hydrogen sulfide, Hydrogen sulfides, sulfur, Sulfur oxidizing bacteria
Аннотация: The importance of bacteria in catalyzing microbially induced concrete corrosion was evaluated. Experiments were conducted to determine the optimum pH and growth kinetics of four selected bacterial strains (Thiobacillus neapolitanus C2, Thiobacillus thioparus H1, Acidithiobacillus thiooxidans, and Acidiphilium cryptum LHET2). CombinПоказать полностьюations of these strains were inoculated into flasks containing ?42 g concrete blocks half-submerged in 600 mL of synthetic wastewater with hydrogen sulfide in the headspace air. Controls not inoculated with bacteria lost 0-3 mg/g concrete over 227 days; in the aqueous phase the minimum pH was 6-6.7 and 19-23 mg of calcium/g concrete was released. Systems inoculated with two species of neutrophilic sulfur oxidizing microorganisms (SOM) lost 8 mg/g concrete; in the aqueous phase the minimum pH was 4.5 and 25 mg of calcium/g concrete was released. The concrete samples incubated with neutrophilic and acidophilic SOM and an acidophilic heterotroph experienced the greatest deterioration, with a total mass loss of 13 mg/g concrete, minimum aqueous pH of 3.0, 28 mg calcium/g concrete released, and 47 mg sulfate/g concrete produced. © 2010 ASCE.
Журнал: Journal of Environmental Engineering, ASCE
Выпуск журнала: Т. 136, № 7
Номера страниц: 731-738
ISSN журнала: 07339372
Издатель: American Society of Civil Engineers