The following navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move through main tier links and expand / close menus in sub tiers. Up and Down arrows will open main tier menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.
Caitlyn Dollar, Sarah Abaddi, Nicholas Ensinger, and Dr. Elsayed M. Zahran Department of Chemistry, Ball State University, 2000 West University Avenue, Muncie, IN, 47306
Glyphosate, N-(phosphonomethyl) glycine, is the active ingredient in many widely used herbicides, such as Roundup, Rodeo, and Pondmaster. Although glyphosate (GLP) is classified as a low toxicity pesticide, several reports have demonstrated its side effects on non-target plants and organisms. With long-term exposure, glyphosate is linked to serious adverse effects on the renal, endocrine, reproductive, and gastrointestinal systems. Aminomethylphosphonic acid (AMPA) is an equally toxic by-product of glyphosate degradation. This work analyzes the kinetics and the degradation pathways of glyphosate and AMPA by Pd@m-BiVO4/BiOBr photocatalyst under simulated sunlight irradiation. Complete degradation of glyphosate by Pd@m-BiVO4/BiOBr was achieved within 5 minutes of the reaction. The Pd@m-BiVO4/BiOBr photocatalyst demonstrated high stability with maintaining over 75% of its activity after six degradation cycles. Our mechanistic studies showed that the main charge carriers involved in the mineralization of glyphosate are the holes and superoxide radicals. Such results could lead to the development of sustainable catalytic technologies to minimize the global impact of glyphosate.
Presenter: Caitlyn Dollar
Institution: Ball State University
Type: Poster
Subject: Chemistry
Status: Approved
