Controls on roxarsone transport in agricultural watersheds

Brown, Brenda; Slaughter, A.D.; Schreiber, Madeline E.

doi:10.1016/j.apgeochem.2004.06.001

Cited by 88 publications

(77 citation statements)

References 19 publications

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“…Roxarsone, which also contains a phenyl group and an arsenate group, was once considered to be resistant to degradation and was used in some countries as an additive in poultry feed for prevention of coccidiosis and for growth stimulation (Anderson, 1983). However, recent studies have reported that roxarsone is a major source of total As in soils, sediments and groundwater due to its high mobility which increases further when roxarsone is biologically transformed into inorganic arsenate or arsenite (Arai et al, 2003;Brown et al, 2005). DPAA has also been found to be degraded in soil, although the process is slow .…”

Section: Mobility Of Dpaa In Soilsmentioning

confidence: 99%

Adsorption and desorption characteristics of diphenylarsenicals in two contrasting soils

Wang

Teng

et al. 2013

Journal of Environmental Sciences

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Diphenylarsinic acid (DPAA) is formed during the leakage of aromatic arsenic chemical weapons in soils, is persistent in nature, and results in arsenic contamination in the field. The adsorption and desorption characteristics of DPAA were investigated in two typical Chinese soils, an Acrisol (a variable-charge soil) and a Phaeozem (a constant-charge soil), their thermodynamics and some of the factors influencing them (i.e., initial pH value, ionic strength and phosphate) using the batch method in order to understand the environmental fate of DPAA in soils. The results indicate that the Acrisol had a stronger adsorption capacity for DPAA than the Phaeozem. Soil DPAA adsorption was a spontaneous and endothermic process and the amount of DPAA adsorbed was affected significantly by variation in soil pH and phosphate. In contrast, soil organic matter (OM) and ionic strength had no significant effect on adsorption. This suggests that DPAA adsorption may be due to specific adsorption on soil mineral surfaces. Therefore, monitoring the fate of DPAA in soils is recommended in areas contaminated by leakage from chemical weapons.

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Section: Mobility Of Dpaa In Soilsmentioning

confidence: 99%

Adsorption and desorption characteristics of diphenylarsenicals in two contrasting soils

Wang

Teng

et al. 2013

Journal of Environmental Sciences

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“…They were approved as feed additives to animals in the United States in 1958 [11], and in China in 1996. The typical dosages of ROX and ASA used are in the range of 20 to 50 g·t −1 for poultry [12] and 50 to 100 g·t −1 for swine [13,14]. Only a small fraction (b 10%) of the organoarsenic compounds are metabolized in the animal bodies, while the rest is excreted via urine and feces [6,15].…”

Section: Introductionmentioning

confidence: 99%

Extraction and detection of organoarsenic feed additives and common arsenic species in environmental matrices by HPLC–ICP-MS

Liu

Zhang

et al. 2013

Microchemical Journal

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“…Arsenic has been shown to leach into soil water from fields receiving litter applications in the Shenandoah Valley (Brown et al 2005), which could lead to eventual transport to stream channels. The lower bioaccumulation of As in streams with the highest watershed densities of poultry AFOs (and other agricultural activities) may result from eutrophic conditions and lower dissolved oxygen concentrations, which can affect bioaccumulation of As by Asian clams (Shoults-Wilson et al 2009).…”

Section: Tissuementioning

confidence: 99%

“…Arsenic is of particular concern in poultry litter because of the addition of roxarsone (3-nitro-4-hydroxyphenylarsonic acid) to some poultry feeds as a growth promoter. This compound is excreted by the birds, is highly soluble in poultry litter (71%), and can be transformed to more toxic inorganic forms of As (Brown et al 2005;Jackson et al 2003). …”

Section: Introductionmentioning

confidence: 99%

Using watershed characteristics, sediment, and tissue of resident mollusks to identify potential sources of trace elements to streams in a complex agricultural landscape

Ciparis

Schreiber

Voshell

2011

Environ Monit Assess

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Trace elements used in animal feed additives can be introduced to aquatic environments through application of manures from animal feeding operations to agricultural land as fertilizer. The use of poultry feed additives containing arsenic (As) is of particular concern in the Shenandoah River watershed (Virginia, USA), an agricultural landscape with a high density of poultry operations. This study investigated the relationship between watershed characteristics of Shenandoah River tributaries and trace element concentrations in streambed sediment and tissue of resident mollusks, including: Asian clams (Corbicula fluminea), which are commonly used biomonitors, and pleurocerid snails (Leptoxis carinata), which are generally understudied. Results failed to support the primary hypothesis of a predictive relationship between watershed densities of poultry operations and As concentrations in sediment and mollusk tissue. However, there were statistical relationships between land use in tributary watersheds and other trace elements in sediment (Cu, Mn, Pb, Zn) and tissue (Cd, Hg, Pb). Principal components analysis of the sediment data suggested a possible geologic source of As at some sites. Tissue concentrations of As were significantly higher in snails than in clams, but clams accumulated higher concentrations of other trace elements (Cd, Cr, Hg, Pb, Se). Snails may be useful biomonitors of environmental As, but appear to be less suitable than clams for studies of landscape sources of other trace elements.

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Controls on roxarsone transport in agricultural watersheds

Cited by 88 publications

References 19 publications

Adsorption and desorption characteristics of diphenylarsenicals in two contrasting soils

Adsorption and desorption characteristics of diphenylarsenicals in two contrasting soils

Extraction and detection of organoarsenic feed additives and common arsenic species in environmental matrices by HPLC–ICP-MS

Using watershed characteristics, sediment, and tissue of resident mollusks to identify potential sources of trace elements to streams in a complex agricultural landscape

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