Arumugam Arul Prakash

Bio: Arumugam Arul Prakash is an academic researcher from Thiruvalluvar University. The author has contributed to research in topics: Biodegradation & Corrosion. The author has an hindex of 5, co-authored 7 publications receiving 67 citations.

Impact and Role of Bacterial Communities on Biocorrosion of Metals Used in the Processing Industry.

Abstract: Open in a separate window In the present study, the effects of the corrosive bacterial community and the biofilm on cooling water systems made from mild steel (MS) and brass (BR) were studied under field exposure conditions using electrochemical impedance spectroscopy measurements, scanning electron microscope, and X-ray diffraction methods. Results from16S rRNA gene sequences showed that the predominant bacteria species detected in the biofilm of MS and BR metals during 360 days of exposure were Bacillus cereus EN14, Achromobacter xylosoxidans EN15, A. xylosoxidans EN16, and B. cereus EN17. The weight loss results revealed that a higher corrosion rate was observed in MS (0.7 ± 0.1 mm/y) compared with that in BR (0.17 ± 0.05 mm/y) at the end of the exposure period. This can be explained by the bacterial communities enhancing the corrosion rates by creating a local corrosive environment. Scanning electron microscope images revealed the adsorption of biofilm on the MS and BR surfaces following180 days of exposure. From the electrochemical impedance study, a higher charge transfer resistance (Rct) was obtained for BR (119.6 Ω cm2) when compared with that of MS (43.4 Ω cm2). This study explains the role of bacterial communities and their mechanisms in the corrosion of MS and BR in cooling water systems.

Myco-Synthesis of Zinc Oxide Nanoparticles as Potent Anti-corrosion of Copper in Cooling Towers

Abstract: This study demonstrated that, myco-synthesis of zinc oxide nanoparticles (ZnONPs) using the aqueous extract of button mushroom (Agarius bisporus) as a reducing agent. The nanoparticle formation was evaluated by UV–visible spectroscopy, Fourier Transform-Infrared spectroscopy, X-ray Diffraction spectroscopy, Energy Dispersive X-ray spectroscopy, and Transmission Electron Microscopy. Anti-corrosion against copper metal was studied in the occurrence of a highly corrosive aerobic bacterium B. thuringiensis EN2, Terribacillus aidingensis EN3, and Bacillus oleronius EN respectively. The results reveal that mixed consortium forms a thick biofilm on the metal surface and the weight loss (WL) was significantly increased to 0.041 ± 2 g when compared to abiotic system (0.014 ± 1 g). In contrast, inhibitor system WL was reduced about 0.004 ± 1 g than biotic system. For further confirmation of the above results, Surface analysis and EIS result revealed that the ZnONPs has inhibited the corrosive bacterial biofilm. This is the first description disclosing the application of myco-synthesized ZnONPs as effective anti-corrosive inhibitors against microbial influenced corrosion.

Biodegradation and corrosion behaviorof manganese oxidizer Bacillus cereus ACE4in diesel transporting pipeline

Abstract: The degradation problem of petroleum products arises since hydrocarbon acts as an excellent food source for a wide variety of microorganisms. Microbial activity leads to unacceptable level of turbidity, corrosion of pipeline and souring of stored product. The present study emphasizes the role of Bacillus cereus ACE4 on degradation of diesel and its influence on corrosion of API 5LX steel. A demonstrating bacterial strain ACE4 was isolated from corrosion products and 16S rRNA gene sequence analysis showed that it has more than 99% similarity with B. cereus. The biodegradation and corrosion studies revealed that B. cereus degraded the aliphatic protons and aromatic protons in diesel and is capable of oxidizing ferrous/manganese into oxides. This is the first report that discloses the involvement of manganese oxidizer B. cereus ACE4 on biodegradation of diesel and its influence on corrosion in a tropical country pipeline.

Recent advances in polymer/metal/metal oxide hybrid nanostructures for catalytic applications: a review

Abstract: This review presents the essence of polymer and polymer/metal oxide hybrid nanoparticles in catalytic applications. The weakness of the modern photocatalytic system such as low ability to migrate the photogenerated electrons and holes, rapid charge recombination, and shortage in use of visible-light hinders its industrial application. As a result, various elements, metalloids, metal oxide, transition metals, mixing with polymers, etc. are dopped as co-catalyst which changes the life of the mechanism. Besides, in this protocol general overview of their synthesis with different approaches reported in the literature was outlined. It also describes their physical hallmarks such as size and shape in terms of synthetic protocols. It provides numerous examples of nanoplatforms valid for catalytic applications. Eventually, it focuses on their potentiality as outstanding catalytic candidates and their use in hydrogen production, wastewater treatment, and air purification.

Biogenic Nanoparticles: Synthesis, Characterisation and Applications

Abstract: Nanotechnology plays a big part in our modern daily lives, ranging from the biomedical sector to the energy sector. There are different physicochemical and biological methods to synthesise nanoparticles towards multiple applications. Biogenic production of nanoparticles through the utilisation of microorganisms provides great advantages over other techniques and is increasingly being explored. This review examines the process of the biogenic synthesis of nanoparticles mediated by microorganisms such as bacteria, fungi and algae, and their applications. Microorganisms offer a disparate environment for nanoparticle synthesis. Optimum production and minimum time to obtain the desired size and shape, to improve the stability of nanoparticles and to optimise specific microorganisms for specific applications are the challenges to address, however. Numerous applications of biogenic nanoparticles in medicine, environment, drug delivery and biochemical sensors are discussed.