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Arsenic concentrations in Florida surface soils: Influence of soil type and properties
Chen, M; Ma, LQ; Harris, WG
2002-03-01
Source PublicationSOIL SCIENCE SOCIETY OF AMERICA JOURNAL
Volume66Issue:2Pages:632-640
AbstractBackground As concentrations in soils are important for defining whether a soil is polluted. Arsenic concentrations in 441 taxonomically and geographically representative surface soils v ere determined using EPA Method 3052 (HCl-HNO(3)-HF digestion). Cumulative distribution plots indicate that As concentrations follow a log-normal distribution and depend on soil type. Sample geometric mean(GM) (the exponential mean of the log-transformed distribution) As concentrations (mg kg(-1)) generally follow the soil taxonomic order of Histosols (2.35) > Inceptisols (0.98), Mollisols (0.72) greater than or equal to Ultisols (0.51) greater than or equal to Alfisols (0.39), and Entisols (0.36) > Spodosols (0.18). The highest As concentrations v ere found in soils that occur exclusively or prevalently in wetlands, such as Hemists (3.16-9.44), Saprists (0.15-11.7), Aquents (0.10-50.6), Aquolls (0.03-3.34), and Aquepts (0.03-38.2). Both linear and multiple regressions indicate soil properties (clay, pH, cation-exchange capacity [CEC], organic C, and total AI), especially total Fe and P, are important factors affecting natural background concentrations of As in Florida soils. Arsenic release from bedrock (limestone) and As bioaccumulation by, aquatic organisms are possible explanations for relatively high As in those wetland soils. The use of a single regulatory value criterion for As contamination in soil cannot provide an adequate assessment given the natural variation in soil As. Baseline soil-As concentration, which was defined as 95% of the expected range of background As concentrations in different soil categories, is necessary for properly assessing potential As contamination.
SubtypeArticle
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedAgriculture
WOS KeywordDRINKING-WATER ; SORPTION ; ENVIRONMENT ; SPECIATION ; METALS
Indexed BySCI
Language英语
WOS SubjectSoil Science
WOS IDWOS:000174275000037
PublisherSOIL SCI SOC AMER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68342
Collection中国科学院地理科学与资源研究所
Corresponding AuthorChen, M
Affiliation1.Chinese Acad Sci, Inst Geog & Nat Resources, Beijing 100101, Peoples R China
2.Univ Florida, Dept Soil & Water Sci, Gainesville, FL 32611 USA
Recommended Citation
GB/T 7714
Chen, M,Ma, LQ,Harris, WG. Arsenic concentrations in Florida surface soils: Influence of soil type and properties[J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,2002,66(2):632-640.
APA Chen, M,Ma, LQ,&Harris, WG.(2002).Arsenic concentrations in Florida surface soils: Influence of soil type and properties.SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,66(2),632-640.
MLA Chen, M,et al."Arsenic concentrations in Florida surface soils: Influence of soil type and properties".SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 66.2(2002):632-640.
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