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• W3048136444 endingPage "127931" @default.
• W3048136444 startingPage "127931" @default.
• W3048136444 abstract "Artificially contaminated soil is often used in laboratory experiments as a substitute for actual field contaminated soils. In the preparation and use of laboratory contaminated soils, questions remain as to how much and how long metals remain in labile form and in their oxidation state during the contamination process. Therefore, the objectives of this study were to determine if the speciation of added contaminants can be retained in the original form and to observe the change in lability of each element with aging time. In this study, natural soil was artificially polluted with five redox-sensitive toxic elements in their oxidized or reduced forms, i.e., As(III)/As(V), Sb(III)/Sb(V), Cr(III)/Cr(VI), Mo(VI), and W(V). Metal distribution was measured in progressive chemical fractionation using sequential extraction methods in contaminated soils after 3, 100, and 300 days of aging. The results indicated that the more strongly bound fraction of metals increased by day 100; whereas the fractions were not significantly different from those in the 300-day-aged soil. Among five metals, the ratio of weakly-bound fractions remained highest in As- and lowest in Cr-contaminated soils. The W(VI)-contaminated soil showed strong sorption without changes in speciation during aging. The oxidized or reduced metal species converged to occur as a single species under given soil conditions, regardless of the initial form of metal used to spike the soil. Both As and Sb existed as their oxidized form while Cr existed as its reduced form. The results of this study may provide a useful and practical guideline for artificial soil contamination." @default.
• W3048136444 created "2020-08-13" @default.
• W3048136444 creator A5001628077 @default.
• W3048136444 creator A5030407696 @default.
• W3048136444 creator A5070250483 @default.
• W3048136444 date "2021-01-01" @default.
• W3048136444 modified "2023-09-24" @default.
• W3048136444 title "Aging effects on fractionation and speciation of redox-sensitive metals in artificially contaminated soil" @default.
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• W3048136444 doi "https://doi.org/10.1016/j.chemosphere.2020.127931" @default.
• W3048136444 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33297015" @default.
• W3048136444 hasPublicationYear "2021" @default.
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