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首页> 外文期刊>RSC Advances >Sulfidogenic-corrosion inhibitory effect of cationic monomeric and gemini surfactants: planktonic and sessile diversity
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Sulfidogenic-corrosion inhibitory effect of cationic monomeric and gemini surfactants: planktonic and sessile diversity

机译：阳离子腐蚀抑制作用阳离子单体和Gemini表面活性剂：浮游生物和无柄多样性

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摘要

A cationic monomeric surfactant (CMS) and a cationic gemini surfactant (CGS) were successfully synthesized and characterized. A comparison of the CMS and CGS metal corrosion inhibitory effects was carried out on the basis of protecting a metal surface from cultivated salinity (3.18% NaCl) and an environmental sulfidogenic bacterial activity in a reactor's bulk phase (planktonic) and on a metal surface (sessile). Environmental sulfidogenic bacterial consortia were originated from an oil-field water tank. The sulfidogenic bacterial activities were evaluated based on redox potential and sulfide concentrations in the reactor's bulk phase. In addition, changes in biofilm structures and constituents and the metal corrosion rate were determined to estimate changes on metal surfaces. Results in the reactor's bulk phases showed that at high surfactant (CMS, CGS) concentrations, a considerable decline in the redox potential was observed and the sulfide productivity was completely suppressed. The synthesized surfactants showed the highest metal corrosion inhibition efficiencies of 92% and 94% at concentrations of 10 mM and 1 mM for the CMS and the CGS, respectively. In addition, the synthesized CMS and CGS showed nonspecific antibacterial activity against Gram-positive and Gram-negative bacterial-standard strains.
机译：成功合成并表征了阳离子单体表面活性剂（CMS）和阳离子Gemini表面活性剂（CGS）。基于保护盐度（3.18％NaCl）的金属表面和反应器的体相（浮游）和金属表面（金属表面）的基于保护金属表面和金属表面的环境硫化细菌活性进行CMS和CGS金属腐蚀抑制作用的比较。无柄）。环境磺基因细菌结合起源于油田水箱。基于反应器的体相中的氧化还原电位和硫化物浓度评估亚硫化物细菌活性。此外，确定生物膜结构和成分和金属腐蚀速率的变化以估计金属表面的变化。结果在反应堆的批量相显示出，在高表面活性剂（CMS，CGS）浓度下，观察到氧化还原电位的相当大的下降，并且完全抑制了硫化物生产率。合成的表面活性剂分别显示出最高金属腐蚀抑制效率为92％和94％，浓度为CMS和CGS的10mm和1mm。此外，合成的CMS和CGS表现出针对革兰氏阳性和革兰氏阴性细菌标准菌株的非特异性抗菌活性。

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  • 来源
    《RSC Advances》 |2016年第48期|共16页
  • 作者

    Labena A.; Hegazy M. A.; Horn H.; Mueller E.;

  • 作者单位

    Tech Univ Munich Urban Water Syst Engn D-85748 Garching Germany;

    EPRI Cairo Egypt;

    Karlsruhe Inst Technol Engler Bunte Inst Water Chem &

    Water Technol Engler Bunte Ring 1 D-76121 Karlsruhe Germany;

    Tech Univ Munich Urban Water Syst Engn D-85748 Garching Germany;

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  • 正文语种 eng
  • 中图分类 化学;
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