Wafaa A. Koush, Ahmed Labena, Hany Elsawy , Laila A. Farahat, Tarek M. Mohamed and Maha M. Salem* Pages 1 - 9 ( 9 )
Background and Aims: This study aims to alleviate the microbiologically affected corrosion that occurred by sulfate-reducing bacteria (SRB) through synthesizing a bio-based polyurethane polymer and its nanocomposite coating, silver nanoparticles (PU-Ag). Moreover, it will also evaluate the effect of PU alone and PU-Ag as inhibitors for adenylyl sulfate reductase (APS), the main enzyme for sulfate reduction.
Methods: In this study, the PU was prepared from vegetable soybean oil, and the silver nanoparticles (Ag-NPs) with a concentration of 1% were coated to the PU forming a nanocomposite. The PU and the PU-Ag were characterized and evaluated as inhibitors of the APS reductase enzyme.
Results: The results obtained from FTIR, UV, DLS, TEM, and XRD confirmed the preparation structure of the PU and PU-Ag. Furthermore, the PU/PU-Ag competitively inhibited the APS reductase with an inhibition constant equal to 35.7 and 11 mg, respectively. These indicated the exerted inhibitory effect of PU/PU-Ag upon the activity of the APS reductase enzyme.
Conclusion: The APS reductase enzyme produced by SRB, which is recorded as a big problem in the oil and gas industry such as pitting corrosion of tanks and pipelines, could be inhibited by PU and PU-Ag.
Polyurethane, nanocomposite, adenylyl sulfate reductase, microbially- influenced corrosion, sulfate-reducing bacteria, silver nanoparticles.
Process Design & Development Department, Egyptian Petroleum Research Institute, Cairo, Process Design & Development Department, Egyptian Petroleum Research Institute, Cairo, Chemistry Department, College of Science, King Faisal University, P.O. Box 380, Al-Hofuf, Al-Ahsa 31982, Process Design & Development Department, Egyptian Petroleum Research Institute, Cairo, Chemistry Department, Biochemistry Branch, Faculty of Science, Tanta University, Tanta 31527, Chemistry Department, Biochemistry Branch, Faculty of Science, Tanta University, Tanta 31527