Chemical Choreography at the Mn Oxide Interface: Protein Association Modulates Glyphosate Bonding Configurations and Favors the AMPA Oxidation Pathway.

Glyphosate, the most widely used herbicide, undergoes adsorption and abiotic degradation on environmental surfaces, with natural organic matter strongly influencing these processes. The role of organo-mineral associations in regulating glyphosate retention and transformation pathways, however, remains unclear. In this study, we employed time-resolved ATR-FTIR spectroscopy and microfluidic experiments coupled with LC-MS quantification to track glyphosate and its oxidation byproducts.

Systematic evaluation of methods for iron-impregnation of biochar and effects on arsenic in flooded soils.

There is a need for innovative strategies to decrease the mobility of metal(loids) including arsenic (As) and cadmium (Cd) in agricultural soils, including rice paddies, so as to minimize dietary exposure to these toxic elements. Iron (Fe)-modified biochars (FBCs) are used to immobilize As and Cd in soil-water systems, but there is a lack of clarity on optimal methods for preparing FBCs because there are only limited studies that directly compare BCs impregnated with Fe under different conditions. There is also a lack of information on the long-term performance of FBCs in flooded soil environments, where reductive dissolution of Fe (oxy)hydroxide phases loaded onto biochar surfaces may decrease the effectiveness of FBCs.

In the presence of the other: How glyphosate and peptide molecules alter the dynamics of sorption on goethite.

The interactions with soil mineral surfaces are among the factors that determine the mobility and bioavailability of organic contaminants and of nutrients present in dissolved organic matter (DOM) in soil and aquatic environments. While most studies focus on high molar mass organic matter fractions (e.g.

Unraveling the role of polysaccharide-goethite associations on glyphosate' adsorption-desorption dynamics and binding mechanisms.

Hypothesis: Glyphosate retention at environmental interfaces is strongly governed by adsorption and desorption processes. In particular, glyphosate can react with organo-mineral associations (OMAs) in soils, sediments, and aquatic environments. We hypothesize mineral-adsorbed biomacromolecules modulate the extent and rate of glyphosate adsorption and desorption where electrostatic and noncovalent interactions with organo-mineral surfaces are favored.