title: The leaching of vanadium(V) in soil due to the presence of atmospheric carbon dioxide and ammonia.
abstract: The natural leaching of vanadium(V) with CO2 from soil-water in the presence of ammonia, a known precursor to atmospheric aerosols, has been tested by bubbling carbon dioxide through soil suspension with varying amount of ammonia. It was found that the leaching of V(V) is enhanced in the presence of ammonia. From the results of the investigation, it could be concluded that atmospheric CO2 in the presence of ammonia (the only atmospheric gas that increases the pH of soil-water) could naturally leach V(V) from soil. Furthermore, it was also shown that the presence of (NH4)2CO3 in soil could enhance the leaching of toxic V(V) species thereby making it bioavailable for both plants and animals.
authors.affiliation: Department of Chemistry, Tshwane University of Technology, P.O. Box 56208, Arcadia, 0007 Pretoria, South Africa. MandiwanaKL@tut.ac.za
authors.forename: Khakhathi L
authors.initials: KL
authors.lastname: Mandiwana
authors.forename: Nikolay
authors.initials: N
authors.lastname: Panichev
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D002254:Carbonates / Q000032:analysis; D007202:Indicators and Reagents; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012015:Reference Standards; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D012995:Solubility; D012996:Solutions; D013054:Spectrophotometry, Atomic; D014639:Vanadium / Q000032:analysis*
chemical_list: D002254:Carbonates; D007202:Indicators and Reagents; D000644:Quaternary Ammonium Compounds; D012987:Soil; D012989:Soil Pollutants; D012996:Solutions; D014639:Vanadium; D002245:Carbon Dioxide; C040502:ammonium carbonate