The Effect of Silica Nanoparticles Addition on Removal of Glyphosate Residue from Aqueous Solutions
W.S. Al-Tharwani*, M.T. Mohammadali and I.M. Abd al-Ridha
Department of Plant Protection, College of Agriculture, University of Kerbala, Iraq. *Email address of corresponding author: wasan.s@s.uokerbala.edu.iq
Received: 10/4/2023; Accepted: 21/6/2023
https://doi.org/10.22268/AJPP-001231
Abstract
The aim of this study was to evaluate glyphosate Tiller 48% SL residues in aqueous water by using silica nanoparticles as adsorption agent to remove glyphosate in aqueous solutions. Results obtained showed that when three concentrations of 10, 15 and 20 ml/L water were used, glyphosate concentration determined immediately after treatment was 3520, 5600 and 7955 mg/L, respectively. The concentration of the herbicide decreased with time and reached 1203 mg/L on the tenth day after treatment. No residues were detected by HPLC 21 days after treatment. The results of the study of the use of Nano-silica as an agent for the removal of glyphosate in aqueous solutions showed that the concentration 200 mg/L nano-silica achieved the highest rate of herbicide removal of 89.37%, outperforming the other two concentrations of 100 and 150 mg/L, which achieved 63.45 and 82.87% removal, respectively.
Keywords
Glyphosate, residues, silica nanoparticles, adsorption.