Linking selective chemical extraction of iron oxyhydroxides to arsenic bioaccessibility in soil
نویسندگان
چکیده
منابع مشابه
Chemical extraction methods to assess bioavailable arsenic in soil and solid media.
Soil ingestion by children is an important pathway in assessing public health risks associated with exposure to arsenic-contaminated soils. Soil chemical methods are available to extract various pools of soil arsenic, but their ability to measure bioavailable arsenic from soil ingestion is unknown. Arsenic extracted by five commonly used soil extractants was compared with bioavailable arsenic m...
متن کاملArsenic bioaccessibility in contaminated soils: Coupling in vitro assays with sequential and HNO3 extraction.
Arsenic bioaccessibility varies with in vitro methods and soils. Four assays including unified BARGE method (UBM), Solubility Bioaccessibility Research Consortium method (SBRC), in vitro gastrointestinal method (IVG), and physiologically based extraction test (PBET), were used to determine As bioaccessibility in 11 contaminated soils (22-4,172 mg kg(-1)). The objective was to understand how bio...
متن کاملLead and Arsenic Bioaccessibility and Speciation as a Function of Soil Particle Size.
Bioavailability research of soil metals has advanced considerably from default values to validated in vitro bioaccessibility (IVBA) assays for site-specific risk assessment. Previously, USEPA determined that the soil-size fraction representative of dermal adherence and consequent soil ingestion was <250 μm. This size fraction was widely used in testing efforts for both in vivo and in vitro expe...
متن کاملHeavy metal bioavailability and bioaccessibility in soil.
This chapter considers the use of a variety of approaches to assess either the bioavailability or the bioaccessibility of metals in soil. The bioavailability of metals from soils is considered with respect to a series of single-extraction methods, including the use of ethylenediaminetetraacetic acid (EDTA), acetic acid, diethylenetriaminepentaacetic acid (DTPA), ammonium nitrate, calcium chlori...
متن کاملMeasurement Modelling and Mapping of Arsenic Bioaccessibility in Northampton, UK
The human ingestion bioaccessibility of As was measured on 50 representative samples of soils selected from a 281 soil sample geochemical survey of Northampton. The major and trace element content, pH and near infra-red (NIR) spectra of the 281 soils were determined. A multiple linear regression (MLR) model using total As, major element composition and pH identified total As, pH and P to be the...
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ژورنال
عنوان ژورنال: Environmental Pollution
سال: 2015
ISSN: 0269-7491
DOI: 10.1016/j.envpol.2015.09.026