Mitigation of Desulfovibrio ferrophilus IS5 degradation of X80 carbon steel mechanical properties using a green biocide

IF 3.1 4区生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Biodegradation Pub Date : 2024-01-23 DOI:10.1007/s10532-023-10063-0

Zhong Li, Jike Yang, Shihang Lu, Wenwen Dou, Tingyue Gu

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引用次数: 0

Abstract

Most microbiologically influenced corrosion (MIC) studies focus on the threat of pinhole leaks caused by MIC pitting. However, microbes can also lead to structural failures. Tetrakis hydroxymethyl phosphonium sulfate (THPS) biocide mitigated the microbial degradation of mechanical properties of X80 steel pipeline by Desulfovibrio ferrophilus (IS5 strain), a very corrosive sulfate reducing bacterium. It was found that 100 ppm (w/w) THPS added to the enriched artificial seawater (EASW) culture medium before incubation resulted in 2.8-log reduction in sessile cell count after a 7-d incubation at 28 °C under anaerobic conditions, leading to 94% uniform corrosion rate reduction (from 1.3 to 0.07 mm/a), and 84% pitting corrosion rate reduction (from 0.70 to 0.11 mm/a). The X80 dogbone coupon incubated with 100 ppm THPS for 7 d suffered 3% loss in ultimate tensile strain and 0% loss in ultimate tensile strength compared with the abiotic control in EASW. In comparison, the no-treatment X80 dogbone coupon suffered losses of 13% in ultimate tensile strain and 6% in ultimate tensile stress, demonstrating very good THPS efficacy.

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使用绿色杀菌剂缓解铁锈脱硫弧菌 IS5 对 X80 碳钢机械性能的降解。

大多数受微生物影响的腐蚀（MIC）研究都集中在 MIC 点蚀造成的针孔泄漏威胁上。然而，微生物也会导致结构失效。四羟甲基硫酸磷（THPS）杀菌剂减轻了铁锈脱硫弧菌（IS5 菌株）对 X80 钢管机械性能的微生物降解作用，铁锈脱硫弧菌是一种腐蚀性很强的硫酸盐还原菌。研究发现，在培养前向富集人工海水（EASW）培养基中添加 100 ppm（w/w）的 THPS 可使无柄细胞数在厌氧条件下于 28 °C 培养 7 天后减少 2.8 个菌落，从而使均匀腐蚀率降低 94%（从 1.3 mm/a 降至 0.07 mm/a），点蚀率降低 84%（从 0.70 mm/a 降至 0.11 mm/a）。与 EASW 中的非生物对照组相比，用 100 ppm THPS 培养 7 d 的 X80 狗骨试样的极限拉伸应变损失为 3%，极限拉伸强度损失为 0%。相比之下，未经处理的 X80 狗骨脆片的极限拉伸应变损失为 13%，极限拉伸应力损失为 6%，这表明 THPS 具有很好的功效。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biodegradation 工程技术-生物工程与应用微生物

CiteScore

5.60

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Biodegradation publishes papers, reviews and mini-reviews on the biotransformation, mineralization, detoxification, recycling, amelioration or treatment of chemicals or waste materials by naturally-occurring microbial strains, microbial associations, or recombinant organisms. Coverage spans a range of topics, including Biochemistry of biodegradative pathways; Genetics of biodegradative organisms and development of recombinant biodegrading organisms; Molecular biology-based studies of biodegradative microbial communities; Enhancement of naturally-occurring biodegradative properties and activities. Also featured are novel applications of biodegradation and biotransformation technology, to soil, water, sewage, heavy metals and radionuclides, organohalogens, high-COD wastes, straight-, branched-chain and aromatic hydrocarbons; Coverage extends to design and scale-up of laboratory processes and bioreactor systems. Also offered are papers on economic and legal aspects of biological treatment of waste.