For their unique physical, chemical and biological characteristics, silver nanoparticles (AgNPs) are used in a variety of applications in the sectors of health and wellness as well as consumer and industrial products. We describe here the production of silver nanoparticles (AgNPs) using activated carbon from locally accessible biowaste Caesalpinia pulcherrima pod is the goal of this work, which aims to characterise the activated carbons generated by oxidation of activated carbons of comparable porosity with Sulphuric acid, nitric acid, and phosphoric acid, respectively. Using Caesalpinia pulcherrima plant extract as a reducing agent, silver particles may be made. TEM was used to determine the particle size, distribution, shape, shape heterogeneity, and aggregation. Analysis of the silver nanoparticle's composition has been done using EDAX. According to the findings, activated carbon derived from Caesalpinia pulcherrima pod is ideal for the adsorption of textile dyes such as Eriofast Blue (EB) and Erionyl Orange (EO) and might be employed as a low-cost efficient adsorbent in the treatment of industrial wastewater.

Adsorption using activated carbon is found to be a promising technology for the removal of dyes present in wastewater. The carbon prepared from Adenanthera paronina L seeds (APAC5) through chemical impregnation, microwave carbonization, and finally muffle furnace activation found to have a 948 m2 /g surface area. The microwave heating generates highly branched activated carbon with fewer surface functional groups. The batch mode adsorption of Basic Orange 21 (BO21) dye onto APAC5 is studied. The maximum quantity of BO21 adsorbed is 49.17 mg/g under batch mode study for 50 mg/lof initial BO21 concentration. The nonlinear form of mathematical expression describes the kinetic and isotherm models better under batch mode analysis.