Green mitigation of microbial corrosion by copper nanoparticles doped carbon quantum dots nanohybrid
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RESEARCH ARTICLE
Green mitigation of microbial corrosion by copper nanoparticles doped carbon quantum dots nanohybrid Sara Taghavi Kalajahi 1 & Behnam Rasekh 2 & Fateme Yazdian 3 & Jaber Neshati 4 & Lobat Taghavi 1 Received: 10 February 2020 / Accepted: 6 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Recently, nanomaterials have been introduced as a new generation of inhibitors to control the microbiologically influenced corrosion (MIC). In this study, copper nanoparticles doped carbon quantum dots (Cu/CQDs) nanohybrid was used as an inhibitor to reduce the MIC. FESEM, EDS, FTIR, and XRD were used to characterize the nanohybrid. The dose-response test was performed to evaluate the inhibitory effect of Cu/CQDs against SRB. Design-Expert software was used to design the matrix of experiment and analyze the result. Cu/CQDs showed significant inhibitory effect against SRB compared to the copper nanoparticles (CuNPs) and carbon quantum dots (CQDs), at 50 ppm. Moreover, corrosion behavior of X60 steel was evaluated via electrochemical impedance spectroscopy (EIS) and Tafel polarization techniques in the presence of SRB and Cu/CQDs. The fitted result of EIS showed that the charge transfer resistance (Rct) value increased in the presence of Cu/CQDs owing to the enhancement in the thickness of the electrical double layer, indicating that Cu/CQDs is able to provide significant corrosion protection to X60 steel in the presence of SRB. In addition, FESEM, EDS, and XRD were used to study the formed corrosion products and biofilm on the surface of X60 steel. Corrosion test results indicated that the addition of the Cu/CQDs reduced the surface damage of X60 steel in the presence of SRB. It is attributed to the carbon dots adsorption film formation, which possessed a significant protective ability to inhibit the corrosion of steel in the presence of SRB. Keywords Microbiologically influencedcorrosion . Sulfate reducingbacteria . X60 steel . Nano inhibitor . EIS . Tafel polarization
Introduction Microbiologically influenced corrosion (MIC) is one of the crucial issues in oil and gas industry, which causes significant economic and environmental losses. The term MIC is used to
define corrosion which happens due to the presence and activity of microorganisms on the metal or non-metallic surfaces (Eid et al. 2018). Bacteria are the most important organisms involved in biocorrosion (Loto 2017). Sulfate-reducing bacteria (SRB) are considered as a well-known group of bacteria in the
Responsible Editor: Weiming Zhang Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-020-10043-4) contains supplementary material, which is available to authorized users. * Behnam Rasekh [email protected]; [email protected]
1
Department of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
2
Sara Taghavi Kalajahi [email protected]
Environment and Biotechnology Division, Research Institute of Petroleum Industry (RIPI)
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