Arsenic anthropogenic source

The developed assay was successfully applied for the arsenite and arsenate determination in contaminated waters of the gold recovery plant and in snow covers of the industrial anthropogenic sources vicinities as well. The data produced are in a good agreement with the results of independent methods atomic absorptioin and atomic emission spectrometry and capillary electrophoresis. 

Concerning anthropogenic sources, methyl arsenic compounds such as methyl arsonic acid and dimethylarsinic acid have been used as herbicides, and were once a significant source of environmental residues. Dimethyl-arsinic acid (Agent Blue) was used as a defoliant during the Vietnam War. 

Arsenic desorption at high pH possible anthropogenic sources ... 

Freitas, M.D., Pacheco, A.M.G. and Ventura, M.G. (2004) Anthropogenic sources of PM2.5 s arsenic, lead, mercury and nickel in northern metropolitan Lisbon, Portugal. Nuclear Instruments and Methods in Physics Research, B(219-220), 153-56. 

Although the predominant source of arsenic and metals to most soils and sediments in New England is sulfide-rich rock, the extensive application of arsenical pesticides and herbicides (lead arsenate, calcium arsenate, and sodium arsenate, and others) on apple, blueberry, and potato fields may have been a possible anthropogenic source of arsenic and lead. The main objective of this study was to determine the lead isotopic compositions of commonly used pesticides, such as lead arsenate, sodium metarsenite, and calcium arsenate, in order to assist in future isotopic comparisons and to better characterize this anthropogenic source of Pb. The pesticides plot along a linear trend in isotope diagrams, for example, in values of... 

FIGURE 72.1. Arsenic contamination in the environment through natural and anthropogenic sources. 

Major anthropogenic sources of lead include the use of Pb as a petrol additive, Pb mining and smelting, printing, Pb paint flakes, sewage sludge and the use of pesticides containing Pb compounds, like lead arsenate. 

Rice K. C., Conko K. M. and Hornberger G. M. (2002) Anthropogenic sources of arsenic and copper to sediments in a suburban lake, northern Virginia. Environ. Sci. Technol. 36, 4962-4967. 

Arsenic is ubiquitous. Its content in the earth s crust is estimated at 1.5-2 mg/kg. Industrial production of metals, burning of coal, fossil fuels, timber, and the use of As compounds in agriculture cause a widespread distribution of arsenic in air beside volcanoes, which are die predominant natural soiuce. Anthropogenic sources, in contrast to natural ones, release the threefold amount of arsenic into the atmosphere 30 x 10 kg/year is estimated. Methylation by biota in soil, water, and air under aerobic and anaerobic conditions is part of the arsenic cycle in die environment [4,8,13-20]. 

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