Elimination of Fipronil which is a phenylpyrazole insecticide and belongs to the Endocrine Disrupting Compound (EDC) was studied. It is a hazardous pollutant and affects the central nervous system, so need to remove this pollutant from wastewater. The present work prepared potential adsorbents; cerium modified different zeolites to remove this pollutant. Adsorbents were prepared with ion-exchange method by simple refluxing followed by washing, drying and calcinations. The adsorption experiments over cerium modified different zeolites were carried out by varying different parameters such as contact time (20-140 min), adsorbent dose (0.50–3.0g/L), pH (2−11), initial concentration (600-1000 ppm), and temperature (25–45°C) and stirring speed (50–250 rpm). All prepared adsorbents were compared to find the best adsorbent, morphological and structural differences were also discussed. Adsorption isotherms and kinetic models were fitted well to the obtained experimental data of the best adsorbent. Langmuir isotherm and pseudo-second-order model fits properly, suggesting monolayer adsorption and high rate of adsorption. The maximum removal for fipronil insecticide was found to be more than 90% at all optimized parameters for cerium modified beta zeolite. Thermodynamics studies were also elaborated which reveals about the spontaneous and exothermic nature of adsorption process. This investigation provides a proficient adsorbent for EDC removal.

Elimination of phenylpyrazole insecticide by cerium modified zeolites via adsorption process: Equilibrium and kinetic analysis

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.