التفاصيل البيبلوغرافية
| العنوان: |
Eutrophication of seawater intensified biocorrosion of copper caused by Desulfovibrio vulgaris biofilm. |
| المؤلفون: |
Lu, Shihang, Zhu, Haixia, Sun, Jiahao, Gu, Tingyue, Xue, Nianting, Chen, Shiqiang, Liu, Guangzhou, Dou, Wenwen |
| المصدر: |
Journal of Materials Science & Technology; Sep2024, Vol. 194, p110-123, 14p |
| مصطلحات موضوعية: |
COPPER, MICROBIOLOGICALLY influenced corrosion, ARTIFICIAL seawater, EUTROPHICATION, SEAWATER, BIODEGRADATION |
| مستخلص: |
• Eutrophication enhances D. vulgaris planktonic growth and its sessile growth on Cu. • Cu MIC uniform corrosion and pitting increase with seawater eutrophication level. • Sessile cells on carbon steel MIC possess more cytochrome c than planktonic cells. • Cytochrome c levels in sessile and planktonic cells do not differ in Cu MIC. • Cu MIC by D. vulgaris belongs to metabolite MIC by secreted biogenic H 2 S. Seawater eutrophication increases the abundance of microbial communities and metabolic activities of microorganisms in seawater and potentially impacts microbiologically influenced corrosion (MIC). Copper as a common material in marine structures and nuclear waste containers faces serious MIC problems. This study investigated the copper MIC caused by Desulfovibrio vulgaris in anaerobic artificial seawater (ASW) with four eutrophication levels: pure ASW (PASW), oligotrophication ASW (OASW), mesotrophication ASW (MASW), and eutrophication ASW (EASW). It was found that the copper MIC increased along with the eutrophication level. The higher eutrophication led to an increase in the planktonic and Cu surface sessile D. vulgaris cell counts and H 2 S concentration in the headspace of anaerobic vials. The resultant weight loss and maximum pitting depth of copper in OASW were 2.0 and 2.4 times those in PASW, while their values in EASW were 2.8 and 4.2 times after 10 d of incubation, respectively. The experimental results combined with a bioenergetic analysis in this study indicated the copper MIC caused by D. vulgaris as belonging to biogenic H 2 S corrosion (i.e., metabolite MIC or M-MIC), which was further confirmed by the identical cytochrome c (Cyt c) (redox-active protein for extracellular electron transfer) expression levels of the planktonic D. vulgaris cells and sessile cells on copper. [Display omitted] [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Materials Science & Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Supplemental Index |
