Organoarsenicals in poultry litter: Detection, fate, and toxicity

Sorption of roxarsone onto soils with different physicochemical properties

“…These results imply that ROX is more mobile in SOM-rich soils and less mobile in Fe-rich soils. This conclusion also indicates that ROX sorption to soils is controlled by the As(V) group and not the phenyl ring, indicating potential inhibition from anions and organic matter that compete for sorption sites (Mangalgiri et al, 2015).…”

“…Sorption of ionizable and less polar organic compounds on sorbents are governed predominantly by ion exchange and electrostatic interactions (adsorption) (Arroyo-Abad et al, 2011;Shimizu et al, 2011;Kwon et al, 2014) and, to a lesser extent, hydrophobic interaction (partitioning) . The role of the arsenate group has been proven for sorption of aromatic arsenicals to soils (Arroyo-Abad et al, 2011;Mangalgiri et al, 2015) and other sorbents (Kwon et al, 2014;Poon et al, 2014;Tanaka et al, 2014;Jun et al, 2015). The low values (i.e., 1.1e4.1) of soil point of zero charge (pH PZC ) listed in Table S1 indicate that the surface for all soils is negatively charged over the tested pH range.…”

“…Inorganic arsenic oxyanions, including arsenite (As(III)) and As(V), are important organoarsenical metabolites commonly found in soils. Since ROX retention in soils is controlled by its As(V) functional group (Mangalgiri et al, 2015), the potential effects of As(III) and As(V) on ROX sorption to soils require study.…”

Biodegradation of roxarsone by a bacterial community of underground water and its toxic impact

“…As(V), depending on the moisture level of the soil, in a poorly oxygenated environment can easily be transformed, by microorganisms, into As(III) or dimethylarsenate, compound which can be easily mobilized and rapidly absorbed by most soils (Mangalgiri et al 2015;Nachman et al 2005). Nevertheless, it must be emphasized that there is scarce information about the toxicity resulting from biotransformation of roxarsone reaching underground waters by lixiviation into them, and also about the role of underground water microorganisms as roxarsone biotransformers.…”

Photodegradation of diphenylarsinic acid by UV-C light: Implication for its remediation

“…Photodegradation by UV irradiation is a major transformation pathway for chemical compounds and has been used successfully to remediate organic pollutants including organoarsenicals [14][15][16]. Bednar et al [17] once reported the photodegradation of roxarsone in soil leachates.…”