Removal of 2,4-Dichloro Phenoxy Acetic Acid by Silica Particles Obtained from the Siliceous Sand of Houeyogbe(Republic of Benin)
نویسندگان
1 Laboratory of Physical Chemistry, Materials and Molecular Modeling / Unit of Inorganic Chemistry, Materials Engineering and Environment (LCP3M / UCIIME), Faculty of Science and Technology (FAST), University of Abomey-Calavi (UAC), Benin
2 Laboratory of Physical Chemistry, Materials and Molecular Modeling / Unit of Inorganic Chemistry, Materials Engineering and Environment (LCP3M / UCIIME), Faculty of Science and Technology (FAST), University of Abomey-Calavi (UAC), Benin
3 Kaba Chemistry and Applications Research Laboratory, Faculty of Sciences and Technologies of Natitingou/UNSTIM, Benin.
4 Laboratory of Physical Chemistry, Materials and Molecular Modeling / Unit of Inorganic Chemistry, Materials Engineering and Environment (LCP3M / UCIIME), Faculty of Science and Technology (FAST), University of Abomey-Calavi (UAC), Benin
5 Laboratory of Physical Chemistry, Materials and Molecular Modeling / Unit of Inorganic Chemistry, Materials Engineering and Environment (LCP3M / UCIIME), Faculty of Science and Technology (FAST), University of Abomey-Calavi (UAC), Benin
6 Laboratory of Physical Chemistry, Materials and Molecular Modeling / Unit of Inorganic Chemistry, Materials Engineering and Environment (LCP3M / UCIIME), Faculty of Science and Technology (FAST), University of Abomey-Calavi (UAC), Benin
7 Kaba Chemistry and Applications Research Laboratory, Faculty of Sciences and Technologies of Natitingou/UNSTIM, Benin.
8 Laboratory of Physical Chemistry, Materials and Molecular Modeling / Unit of Inorganic Chemistry, Materials Engineering and Environment (LCP3M / UCIIME), Faculty of Science and Technology (FAST), University of Abomey-Calavi (UAC), Benin
doi
10.22090/jwent.2024.04.08چکیده
In this study, silica sands from the commune of Houéyogbé were used to synthesize silica particles by the sol-gel method, using sodium silicate as the reaction precursor. Analysis by X-ray diffraction, infrared spectroscopy, and scanning electron microscopy revealed the formation of pure amorphous silica with spherical shapes. This material was used as an adsorbent to remove 2,4-dichlorophenoxyacetic acid, one of the pesticides most widely used by farmers in Benin. The use of pesticides is a major environmental problem due to their toxicity. Pesticides pollute soils, surface, and groundwater, and it is, therefore, important to find a way of mitigating or even eliminating their effects on the environment. Adsorption tests for this pollutant were carried out in batch mode. The adsorption study showed a maximum of over 90%. The kinetic study indicates that adsorption is effective from the first five (5) minutes and becomes established after one hour. The L-type adsorption isotherm shows that pesticide adsorption takes place by progressive saturation (monolayer).
