title: An investigation of inorganic antimony species and antimony associated with soil humic acid molar mass fractions in contaminated soils.
abstract: The presence of antimony compounds is often suspected in the soil of apple orchards contaminated with lead arsenate pesticide and in the soil of shooting ranges. Nitric acid (1M) extractable Sb from the shooting range (8300 microg kg(-1)) and the apple orchard (69 microg kg(-1)) had considerably higher surface Sb levels than the control site (<1.5 microg kg(-1)), and Sb was confined to the top approximately 30 cm soil layer. Sb(V) was the principal species in the shooting range and the apple orchard surface soils. Size exclusion chromatography-inductively coupled plasma-mass spectrometry (SEC-ICP-MS) analysis of humic acids isolated from the two contaminated soils demonstrated that Sb has complexed to humic acid molar mass fractions. The results also indicate that humic acids have the ability to arrest the mobility of Sb through soils and would be beneficial in converting Sb(III) to a less toxic species, Sb(V), in contaminated areas.
authors.affiliation: School of Natural Science, Hampshire College, 869, West Street, Amherst, MA 01002, USA.
authors.forename: Sarah
authors.initials: S
authors.lastname: Steely
authors.forename: Dulasiri
authors.initials: D
authors.lastname: Amarasiriwardena
authors.forename: Baoshan
authors.initials: B
authors.lastname: Xing
mesh_terms: D000965:Antimony / Q000032:analysis* / Q000737:chemistry; D002614:Chelating Agents / Q000032:analysis; D002853:Chromatography, Liquid / Q000379:methods; D004784:Environmental Monitoring / Q000379:methods; D005638:Fruit; D006812:Humic Substances / Q000032:analysis*; D027845:Malus; D013058:Mass Spectrometry / Q000379:methods; D017942:Nitric Acid / Q000737:chemistry; D010084:Oxidation-Reduction; D011998:Recreation; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D002614:Chelating Agents; D006812:Humic Substances; D012987:Soil; D012989:Soil Pollutants; D017942:Nitric Acid; D000965:Antimony