Microbicidal Study of Zinc Oxide Nanocomposites Based Coir Geotextile with Image Processing

Anjana S. Desai1

Vaishnavi Dabir2

Aparna Ashok3

Zijian Wu4,5

Habib M. Pathan6

Zhanhu Guo5

Neeru Bhagat3,Email

1Samundra Institute of Maritime Studies, Lonavala, Pune, Maharashtra, 410405, India.

2Department of Civil Engineering, Symbiosis Institute of Technology, Symbiosis International (Deemed) University, Pune, Maharashtra, 412115, India.

3Department of Applied Science, Symbiosis Institute of Technology, Symbiosis International (Deemed) University, Pune, Maharashtra, 412115, India.

4School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, China.

5Department of Mechanical and Civil Engineering, Northumbria University, Newcastle Upon Tyne, NE1 8ST, UK.

6Department of Physics, Savitribai Phule Pune University, Pune, Maharashtra, 411007, India. 

Abstract

Coir geotextiles, as biodegradable geosynthetics, are increasingly applied in infrastructure projects like river training, coastal protection, and bridge abutments. Despite their sustainability, they have limitations like lower strength, higher water retention, and susceptible to degradation. To address this, zinc oxide nanoparticles (ZnO NPs), known for their intrinsic antibacterial properties, were employed to retard the biodegradability of coir geotextile. The ZnO NPs along with three unique binders were used for coating as a nanocomposite to form a modified coir geotextile. ZnO NPs were biologically synthesized using turmeric extract (T) and mixed with organic binder wheat flour, starch, and plant-derived glue for coating the coir geotextile. Characterizations of the ZnO NPs confirmed their purity and spherical morphology. Microbial degradation study through soil burial method was performed on the nanocomposite-based coir geotextile (NCG). It was determined through image processing on all the three NCG, that nanocomposite consisting of wheat flour provided the promising antimicrobial property. The research also investigated the dosage-dependent antibacterial activity of ZnO NPs and the ZnO NPs with wheat flour as binder by MTT assay against Proteus mirabilis. The Minimum Inhibitory Concentration (MIC) were determined to be 39% and 46%, for ZnO NPs coated NCG and ZnO NPs with binder coated NCG at a concentration of 40 µg/mL respectively. In conclusion, this study demonstrates the potential of ZnO NPs in binders to create antimicrobial modified coir geotextiles, offering enhanced biodegradation resistance and effective protection against microbial degradation, thereby contributing to sustainable infrastructure solutions.

Microbicidal Study of Zinc Oxide Nanocomposites Based Coir Geotextile with Image Processing