Contributions of Pesticide use to Urban Background Concentrations of Arsenic in Denver, Colorado, U.S.A.

Folkes, David J.; Kuehster, Theodore E.; Litle, Robert A.

doi:10.1006/enfo.2001.0048

Cited by 33 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, extensive research has been done on toxic metal behavior and distributions in aquatic systems including mercury (Babiarz et al 1998;Balogh et al 1998;Lacerda et al 2004), arsenic (Aurilio et al 1995;Folkes et al 2001), and cadmium (Tong and Chen 2002;Merry and Tiller 2004). Little is known, however, about how watershed land use can affect the Fe, Cu, and Mn concentrations in freshwater systems.…”

Section: Introductionmentioning

confidence: 98%

Watershed land use as a determinant of metal concentrations in freshwater systems

Das

Nordin

2009

Environ Geochem Health

View full text Add to dashboard Cite

Concentrations of Fe, Mn, Cu, dissolved organic matter (DOM), and pH were synthesized from 30 publications to determine the factors regulating concentrations and behavior of metals in freshwater systems. Results from the review suggest that contrasting watershed land use can directly (erosion and runoff) and indirectly (in-lake processes including metal-DOM-pH interactions) affect the metal concentrations in freshwater systems. Among the watershed land uses considered here, concentrations of Fe, Mn, and Cu were observed in the following order: arctic lakes < forested < agricultural < urbanized < mined. A drastic difference in mean metal concentrations has been observed when undisturbed or low impact watersheds (arctic and forested) were changed by agricultural, urban, and mining developments. Relationships between metal concentrations and pH revealed that metals precipitate at high pH (pH > 5). Additionally, at pH < 5, metal concentrations were significantly correlated with DOM due to metal-DOM complexation. High ratios of metal: DOM occur only at low DOM concentrations. Collectively, two general conclusions can be drawn from this review. First, lakes, rivers, and streams with urbanized watersheds are the most susceptible to increased concentrations of metals. Secondly, these results also suggest that regardless of high or low DOM in the water column, pH would affect metal concentrations in freshwater systems. Nonetheless, free metal ions would be higher in freshwater systems with acidic water and low DOM.

show abstract

Section: Introductionmentioning

confidence: 98%

Watershed land use as a determinant of metal concentrations in freshwater systems

Das

Nordin

2009

Environ Geochem Health

View full text Add to dashboard Cite

show abstract

“…Comparable studies in alluvial and fluvial sediments have also shown relatively high ratios with the UCC for As, Cd, Cr, and Pb that were related to anthropogenic processes (Singh et al 2001, Ridgway et al 2003. Arsenic occurs in certain pesticides (Folkes et al 2001) but is found naturally enriched in many deltaic marine environments, of which Bangladesh is the best-known example.…”

Section: Spatial Representation and Spatial Anomaliesmentioning

confidence: 96%

Patterns in soil quality: Natural geochemical variability versus anthropogenic impact in soils of Zeeland, The Netherlands

Gaans

Spijker

Vriend

et al. 2007

International Journal of Geographical Information Science

View full text Add to dashboard Cite

We demonstrate a structured approach to identify natural as well as anthropogenic geochemical patterns in sedimentary soils, using statistical techniques that increase in complexity and the requirements for auxiliary data. Comparison with the average upper continental crust identified natural regional features, such as a relative enrichment of As, due to a low-lying deltaic environment, and of Cr and Zr, related to a specific heavy mineral association. Identification of diffuse contamination is best achieved by comparison with a local reference. The Zeeland subsoil is shown to have undergone only minor anthropogenic influence and to serve this purpose very well. A topsoil-subsoil comparison revealed anthropogenic enrichments for Cd, Cu, P, Pb, S, Sb, Sn, Zn, and partly for As, while typically 'non-anthropogenic' trace elements like Cs, Ga, La, and Rb were found not to be enriched. Except for P and S, the enriched components show a good correlation with Al 2 O 3 , a proxy for clay mineralogy, and a bivariate topsoil-subsoil comparison is made using a trimmed Reduced Major Axis regression. Two subregions are identified with different associations (Zn, Pb, and Cd, versus As, Cd, Cu, and Sn) of higher-than-average enrichments.

show abstract

“…[34] Soil investigations near a former smelter in Colorado, USA, revealed that historic use of arsenical pesticides has contributed significantly to anthropogenic background concentrations of arsenic on certain residential properties. A variety of techniques including spatial analysis, arsenic speciation and calculation of metal ratios was successful in the separation of smelter impacts from pesticide impacts [35] but such an application would tend to be limited to specific locations.…”

Section: Detailed Examinationmentioning

confidence: 99%

Measurement of soil characteristics for forensic applications

Dawson¹,

Hillier²

2010

Surface & Interface Analysis

View full text Add to dashboard Cite

Soils may constitute evidence that connects a person or object to a particular location. The value of soil stems from its ubiquity and transferability to objects or persons. Due to the complexity of soil, the analysis of its inorganic and organic components can provide complementary and independent types of information about its geological origin, dominant vegetation, management and environment. We present an overview of a range of soil characterisation methods including chemical analysis, mineralogy and palynology, along with new approaches such as DNA profiling and profiling of other digital data such as that obtained from X-ray powder diffraction, infrared spectroscopy and organic marker analysis.Individual analytical techniques have different scales of resolution and relevance depending on the nature of the criminal case and context. Each method has its strengths and weaknesses. As more methods have become digital and quantitative, their use in combination as digital profiles will help to characterise soils more accurately and at different scales. These new approaches can be tested using existing soil databases, and database development and use will help to refine and narrow probable origin of a questioned sample in police intelligence, as well as giving increasingly robust sample comparisons for evidence.

show abstract

Contributions of Pesticide use to Urban Background Concentrations of Arsenic in Denver, Colorado, U.S.A.

Cited by 33 publications

References 7 publications

Watershed land use as a determinant of metal concentrations in freshwater systems

Watershed land use as a determinant of metal concentrations in freshwater systems

Patterns in soil quality: Natural geochemical variability versus anthropogenic impact in soils of Zeeland, The Netherlands

Measurement of soil characteristics for forensic applications

Contact Info

Product

Resources

About