Comparison of Sequential Extraction and Bioaccessibility Analyses of Lead Using Urban Soils and Reference Materials

Howard, Jeffrey L.; Dubay, Brian R.; McElmurry, Shawn P.; Clemence, Josiah; Daniels, W. Lee

doi:10.1007/s11270-013-1678-y

Cited by 17 publications

(3 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite the perceived selectivity of the extraction reagents for the major components of the sample matrix, it is important to take into account that these reagents are not entirely selective, i.e. some dissolution of non-targeted phases is inevitable (Beckett 1989;Filgueiras et al 2002;Howard et al 2013). The procedure followed in this work was as described by Patinha et al (2014), where 7 sequential steps of increasing chemical strength were defined for the extraction of elements bound to: (F1) exchangeable ions; (F2) acid-soluble forms; (F3) Mn-oxides; (F4) amorphous Fe-oxyhydroxides; (F5) organic matter and sulphides (partially); (F6) crystalline Fe-oxides; (F7) resistant minerals such as silicates and some oxides and sulphides.…”

Section: Sequential Selective Chemical Extractions (Ssce)mentioning

confidence: 99%

Assessment of the influence of traffic-related particles in urban dust using sequential selective extraction and oral bioaccessibility tests

Patinha

Durães

Sousa

et al. 2015

Environ Geochem Health

View full text Add to dashboard Cite

Urban dust is a heterogeneous mix, where traffic-related particles can combine with soil mineral compounds, forming a unique and site-specific material. These traffic-related particles are usually enriched in potentially harmful elements, enhancing the health risk for population by inhalation or ingestion. Urban dust samples from Estarreja city and traffic-related particles (brake dust and white traffic paint) were studied to understand the relative contribution of the traffic particles in the geochemical behaviour of urban dust and to evaluate the long-term impacts of the metals on an urban environment, as well as the risk to the populations. It was possible to distinguish two groups of urban dust samples according to Cu behaviour: (1) one group with low amounts of fine particles (<38 µm), low contents of organic material, high percentage of Cu in soluble phases, and low Cu bioaccessible fraction (Bf) values. This group showed similar chemical behaviour with the brake dust samples of low- to mid-range car brands (with more than 10 years old), composed by coarser wear particles; and (2) another group with greater amounts of fine particles (<38 µm), with low percentage of Cu associated with soluble phases, and with greater Cu Bf values. This group behaved similar to those found for brake dust of mid- to high-range car brands (with less than 10 years old). The results obtained showed that there is no direct correlation between the geoavailability of metals estimated by sequential selective chemical extraction (SSCE) and the in vitro oral bioaccessibility (UBM) test. Thus, oral bioaccessibility of urban dust is site specific. Geoavailability was greatly dependent on particle size, where the bioaccessibility tended to increase with a reduction in particle diameter. As anthropogenic particles showed high metal concentration and a smaller size than mineral particles, urban dusts are of major concern to the populations' health, since fine particles are easily re-suspended, easily ingested, and show high metal bioaccessibility. In addition, Estarreja is a coastal city often influenced by winds, which favours the re-suspension of small-sized contaminated particles. Even if the risk to the population does not represent an acute case, it should not be overlooked, and this study can serve as baseline study for cities under high traffic influence.

show abstract

Section: Sequential Selective Chemical Extractions (Ssce)mentioning

confidence: 99%

Assessment of the influence of traffic-related particles in urban dust using sequential selective extraction and oral bioaccessibility tests

Patinha

Durães

Sousa

et al. 2015

Environ Geochem Health

View full text Add to dashboard Cite

show abstract

“…Exchangeable K is higher because of the presence of unweathered parent materials, in contrast to native soils in which fixation by weathered mica has reduced plant-available K to low levels (Howard et al, 2012). These ASDs are also distinguished by elevated levels of lead and other common toxic metals and metalloids (Howard and Olszewska, 2011; Howard et al, 2013a, 2013b). In contrast to native soils, the data in Table 2 suggest that ASDs also may be distinguished by elevated electrical conductivity values (>150 µS/cm).…”

Section: Natural Versus Anthropogenic Holocene Depositsmentioning

confidence: 99%

Proposal to add anthrostratigraphic and technostratigraphic units to the stratigraphic code for classification of anthropogenic Holocene deposits

Howard

2014

The Holocene

View full text Add to dashboard Cite

Anthropogenic surficial deposits are formed from Holocene and older deposits that have been so modified by human activity that their original form is unrecognizable. Because their characteristics are fundamentally different from those of natural origin, the creation of special stratigraphic categories seems justified. Two new material categories are proposed for the stratigraphic classification of anthropogenic deposits. An anthrostratigraphic unit (ASU) is defined as a stratiform or irregularly shaped body of anthropogenic origin in the sedimentary record distinguished and delineated on the basis of lithologic characteristics and/or bounding disconformities. An anthropogenic origin is indicated if the deposit (1) lies beneath an anthropogenic landform, (2) contains artifacts, (3) shows evidence of artificial mixing or other human disturbance, and/or (4) was imported from offsite and is allochthonous. The basic ASU is the anthrostratum, defined as a mostly stratiform body of artificially mixed earth (rock, sediment, soil, etc.) and artifactual (brick, concrete, etc.) materials. An anthrostratum need only be mappable at a local scale, but anthrostrata of different origins or type may be grouped together as an anthroformation if regionally mappable. A technostratigraphic unit (TSU) is defined as a stratiform body of anthropogenic origin in the sedimentary record defined on the basis of artifacts (objects of anthropogenic origin). TSUs are based on the evolution of technology involved in the creation of artificially altered or manufactured objects. The basic TSU is the technozone defined on the basis of Commercial Ranges (time from beginning to end of commercial availability of certain artifacts). ASUs and TSUs are applicable to anthropogenic deposits assigned to either the Holocene or the Anthropocene.

show abstract

“…The methodofTessier et al [25]is the most widely used, which operationally separatesPb into5 fractions, i.e., exchangeable Pb, and Pb associated with carbonates, Fe/Mn oxides, organic matter, and residualfractions, showing decreasing bioavailability. For example, Pb inthe carbonate and Fe/Mn oxides bound fractionsis more bioavailable than Pbinthe residual fraction [26,27].However, correlations between Pb fractionation by sequential extraction and Pb bioaccessibilityare rarely established [23,28].…”

Section: Introductionmentioning

confidence: 99%

Lead bioaccessibility in 12 contaminated soils from China: Correlation to lead relative bioavailability and lead in different fractions

Cave

et al. 2015

Journal of Hazardous Materials

120

View full text Add to dashboard Cite

HighlightsLead bioaccessibility in the gastric phase (GP) and Pb-RBA was generally lower in mining soils (0.4629%and 7.026%) than smelting (1992% and 3184%) and farming soils (1399% and 5161%), with more Pb in the residual fraction in mining soils. Lead bioaccessibilityvaried with assays, with SBRC (3.099%)producing significantly higher bioaccessible Pbthan other assays (0.4684%) in the gastric phase. However, Pb bioaccessibilityin the intestinal phase (IP) of all assays sharply decreased to 0.01-20%possibly due to Pbsorption to solid phase at higher pH. Lead bioaccessibility by UBM-GPassay was best correlated with Pb-RBA (r 2 =0.67), followed by IVG-GP (r 2 =0.55).Among different Pb fractions, strong correlation was found between Pb bioaccessibility/Pb-RBA andthe sum of exchangeable and carbonate fractions. Our study suggested thatUBM-GP assay has potential to determine Pbbioaccessibility in contaminated soils in China.

show abstract

Comparison of Sequential Extraction and Bioaccessibility Analyses of Lead Using Urban Soils and Reference Materials

Cited by 17 publications

References 63 publications

Assessment of the influence of traffic-related particles in urban dust using sequential selective extraction and oral bioaccessibility tests

Assessment of the influence of traffic-related particles in urban dust using sequential selective extraction and oral bioaccessibility tests

Proposal to add anthrostratigraphic and technostratigraphic units to the stratigraphic code for classification of anthropogenic Holocene deposits

Lead bioaccessibility in 12 contaminated soils from China: Correlation to lead relative bioavailability and lead in different fractions

Contact Info

Product

Resources

About