Green Synthesis of Silver Nanoparticles from Aqueous Seed Extract of C. papaya and its Application in Surface Water Resources Decontamination

Abstract

There have been reports of biological approaches, including the use of plant extract, for treating water in recent times. Water purification using green nanotechnology is an alternative to chemical and physical water treatments and is environmentally friendly, benign, green, cost - effective, safe, and easily sourced and scale up potable water for large scale synthesis. The purpose of this work is to synthesize silver nanoparticles from an aqueous seed extract of C. papaya and evaluate its application in water and wastewater decontamination. After obtaining the plant extract from C. papaya, it underwent phytochemical analysis. Silver nitrate solution was then utilized to create nanoparticles. The synthesized nanoparticle was examined using SEM, FT-IR, UV-Vis spectroscopy and XRD methods. The physicochemical and microbiological characteristics of the water samples subjected to 0.5 mg/mL of the produced nanoparticle at various intervals (30, 60, and 120 min) were examined both before and after treatment. The findings of the phytochemical studies indicated that alkaloids and tannins were present, while steroids and glycosides were not. The hydroxyl group was detected in the extract according to the FT-IR measurement. The UV-Vis test showed that at 400 nm, the absorbance was 2.598. The nanoparticle size range is consistent with the particle sizes found in the XRD data, which was14.4 nm. Also, irregular, clustered, and sometimes crystalline or snowflake-like shapes were identified by the SEM results. Following nanoparticle treatment for 120 min, there were significant decreases (P < 0.05) in some physicochemical parameters of the different water resources treated. Therefore, it has been demonstrated that using biosynthesized silver nanoparticles from C. papaya aqueous seed extract in a variety of water and wastewater samples is beneficial for environmental processes such as disinfection