title: Baseline concentrations of trace elements in residential soils from Southeastern Missouri.
abstract: Anthropogenic sources of pollution can significantly contribute to elevated concentrations of toxic elements in soils. A preliminary survey of trace elements content and their availability in residential soils from New Madrid County, Missouri was undertaken. Mean elemental concentrations (mg kg(-1), dry wt) of sixty two soil samples were: As 6.6, Be 0.8, Cd 1.6, Co 9.7, Cr 24.5, Cu 18.1, Fe 9951, Mn 298, Ni 15.6, Pb 48.8, V 42.1, Zn 95.5 and Hg 0.05. The US EPA preliminary remediation goals (PRGs) was only exceeded by As (7 % of samples) and V (8% of samples). The Missouri average background values were exceeded by Pb (69%), Zn (31%), Cu (27%), As (23%), Be (19%), Co (18%), Ni (16%), V (8%) and Mn (2%). Crustal enrichments (EFc) for As (97), Cr (6), Cu (10), Pb (121), V (7), and Hg (17) were highest for North Lilbourn soils. Fractionation experiment revealed that Fe (54-79%) was in the residual phase while Zn (70-90%), Mn (88-92%), As (59-81%) and Pb (63-79%) were potentially available in soils. Factor loadings of the element concentrations on principal components 1, 2 and 3 accounted for over 81% variance of the data set. The factor loadings suggested that apart from natural contributions of trace elements to the soils, human activities possibly accounted for other inputs in soils.
authors.affiliation: Co-operative Research Programs, Lincoln University, 307 Foster Hall, 904 Chestnut Street, Jefferson City, MO 65101, USA. Ikema@Lincolnu.edu
authors.forename: Abua
authors.initials: A
authors.lastname: Ikem
authors.forename: Marjorie
authors.initials: M
authors.lastname: Campbell
authors.forename: Isabelle
authors.initials: I
authors.lastname: Nyirakabibi
authors.forename: Jimmie
authors.initials: J
authors.lastname: Garth
mesh_terms: D052918:Environmental Restoration and Remediation; D008923:Missouri; D012989:Soil Pollutants / Q000032:analysis*; D014131:Trace Elements / Q000032:analysis*; D014961:X-Ray Diffraction
chemical_list: D012989:Soil Pollutants; D014131:Trace Elements