Synthesis of silver nanoparticles from Indian red yeast rice and its inhibition of biofilm in copper metal in cooling water environment

• Published in: Environmental science and pollution research international 2022-11, Vol.29 (51), p.77800-77808
• Main Authors: Suganya, Muthukumar, Preethi, Parameswaran Sujatha, Narenkumar, Jayaraman, Prakash, Arumugam Arul, Devanesan, Sandhanasamy, AlSalhi, Mohamad S., Rajasekar, Aruliah, Nanthini, Ayyakkannu Usha Raja
• Format: Article
• Language: English
• Subjects: Antibacterial activity; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Bacterial corrosion; Biofilms; Cooling water; Copper; Corrosion; Corrosion inhibitors; Corrosion prevention; Corrosion rate; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Ferric oxide; Metal surfaces; Metals; Nanoparticles; Protective coatings; Research Article; Silver; Silver nitrate; Surface properties; Waste Water Technology; Water Management; Water Pollution Control; Yeasts
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-022-21219-5

The development of environmentally acceptable benign techniques using purely natural methods is a cost-effective procedure with long-term benefits in all areas. With this consideration, myco synthesized silver nano particles (AgNPs) were studied and it acted as an impending corrosion inhibitor in the environment. Initially, AgNPs were evaluated by physical and surface characterizations and this evidence demonstrated that RYREʼs water-soluble molecules played an essential role in the synthesis of AgNPs in nano spherical size. The myco synthesized of AgNPs has showed an antibacterial activity against corrosive bacteria in cooling water system (CWS). Hence, the AgNPs were used in biocorrosion studies as an anticorrosive agent along with AgNO 3 and RYRE was also checked. For this experiment, the copper (Cu) metal (CW024) which is commonly used was selected, the result of corrosion rate was decreased, and inhibition efficiency (82%) was higher in the presence of AgNPs in system IV. Even though, AgNO 3 and RYRE had contributed significant inhibition efficiency on Cu at 47% and 61%, respectively. According to XRD, the reaction of AgNPs on Cu metal resulted in the formation of a protective coating of Fe 2 O 3 against corrosion. EIS data also indicated that it could reduce the corrosion on the Cu metal surface. All of these findings point out the possibility that the myco-synthesized AgNPs were an effective copper metal corrosion inhibitor. As a result, we encourage the development of myco-synthesized AgNPs, which could be useful in the industrial settings. Graphical abstract