Arsenic background concentrations in Florida, USA surface soils: Determination and interpretation
Chen, M; Ma, LQ; Hoogeweg, CG; Harris, WG
AbstractBackground concentrations of soil arsenic have been used as an alternative soil cleanup criterion in many states in the U.S. This research addresses issues related to the interpretation of background concentrations of arsenic in near pristine soils in Florida. Total arsenic was measured in 448 taxonomic and geographic representative surface soil samples using USEPA Method 3052 (HCl-HNO(3)-HF, microwave digestion) and graphite furnace atomic absorption spectrophotometry analysis procedure. Values were log-normally distributed, with geometric mean and baseline concentration (defined as 95% of the expected range of background concentrations) providing the most satisfactory statistical results. An upper baseline concentration of 6.21 mg As/kg was estimated for undisturbed soils (n = 267) compared to 7.63 mg As/kg for disturbed soils (n = 181). Temporal trend of total soil arsenic concentrations from 1967 to 1989 paralleled decreased usage of arsenic in U.S. agriculture. Soil arsenic background concentrations were generally higher in south Florida than in north and central Florida, and associated with wet soils. Individual high arsenic sites were scattered throughout the state, but the most highly concentrated of these occurred in the Leon-Lee belt along the Ocala uplift district extending to the southwestern flatwoods district. Extrapolation of the data using a single arsenic value regardless of the taxonomic and geographical differences in soil arsenic distribution would underestimate potential arsenic contamination in upland soils. (C) 2001 AEHS.
KeywordArsenic Background Concentration Baseline Concentration Soils Geographic Distribution Temporal Distribution
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI ; ISTP
WOS SubjectEnvironmental Sciences
WOS IDWOS:000169433100003
Citation statistics
Cited Times:116[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorChen, M
AffiliationChinese Acad Sci, Inst Geog & Nat Resources, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Chen, M,Ma, LQ,Hoogeweg, CG,et al. Arsenic background concentrations in Florida, USA surface soils: Determination and interpretation[J]. ENVIRONMENTAL FORENSICS,2001,2(2):117-126.
APA Chen, M,Ma, LQ,Hoogeweg, CG,&Harris, WG.(2001).Arsenic background concentrations in Florida, USA surface soils: Determination and interpretation.ENVIRONMENTAL FORENSICS,2(2),117-126.
MLA Chen, M,et al."Arsenic background concentrations in Florida, USA surface soils: Determination and interpretation".ENVIRONMENTAL FORENSICS 2.2(2001):117-126.
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