Testing single extraction methods and in vitro tests to assess the geochemical reactivity and human bioaccessibility of silver in urban soils amended with silver nanoparticles

Cruz, Nuno; Rodrigues, Sónia; Tavares, Daniela; Monteiro, Rui; Carvalho, Lina; Trindade, Tito; Duarte, Armando C.; Pereira, Eduarda; Römkens, P.F.A.M.

doi:10.1016/j.chemosphere.2015.04.071

Cited by 27 publications

(13 citation statements)

References 39 publications

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“…Even though pH is a key factor that contributes to the extractability of Ag from soil, the large difference in pH between the three extracts alone is not sufficient to explain the differences in Ag extractability for the glycine or EDTA extraction tests. A study by Cruz et al [60] revealed that the extraction efficiency using dilute (0.43 M) and concentrated (2M) HNO3 extractions was far lower compared to that of the glycine test performed at an 4). Both 0.01 M CaCl 2 and EDTA extracted very low concentrations of Ag from soil: 0.3-0.5 mg kg −1 (CaCl 2 ) and 1.0-1.1 mg kg −1 (EDTA) (corresponding to <3.2%, and <8.5% of total Ag added, respectively).…”

Section: Potential Availability Of Ag Retained In the Solid Matrixmentioning

confidence: 98%

“…A study by Cruz Even though pH is a key factor that contributes to the extractability of Ag from soil, the large difference in pH between the three extracts alone is not sufficient to explain the differences in Ag extractability for the glycine or EDTA extraction tests. A study by Cruz et al [60] revealed that the extraction efficiency using dilute (0.43 M) and concentrated (2M) HNO 3 extractions was far lower compared to that of the glycine test performed at an equally acid level (pH 1.5). This confirmed that both low pH and the presence of complexing ligands that form very stable complexes with Ag are required to release appreciable amounts of Ag retained in soil [27,60].…”

Section: Potential Availability Of Ag Retained In the Solid Matrixmentioning

confidence: 98%

“…Environments 2021, 8, x FOR PEER REVIEW 10 of 15 et al [60] revealed that the extraction efficiency using dilute (0.43 M) and concentrated (2M) HNO3 extractions was far lower compared to that of the glycine test performed at an equally acid level (pH 1.5). This confirmed that both low pH and the presence of complexing ligands that form very stable complexes with Ag are required to release appreciable amounts of Ag retained in soil [27,60].…”

Section: Analysis Of Soil Exoenzymes Activitiesmentioning

confidence: 99%

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Dissolution of Ag Nanoparticles in Agricultural Soils and Effects on Soil Exoenzyme Activities

et al. 2021

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To assess environmental risks related to the mobility and toxicity of AgNPs, the chemical availability of AgNPs and polyvinylpyrrolidone-coated AgNPs (PVP-AgNPs) in three agricultural soils was quantified in a pot experiment. Porewater collection and soil extractions with 0.01 M CaCl2, 0.4 M Glycine (pH 1.5) and 0.05 M NH4-EDTA were performed. The effect on soil exoenzyme activities was also assessed. Porewater concentration was low (<0.4% and <0.04% of dosed Ag, for AgNPs and PVP-AgNPs, respectively) and only detected in acidic soils (pH 4.4 and 4.9). The PVP-coating reduced the downward mobility of AgNPs in soil and possibly also their dissolution rate (and subsequent release of dissolved Ag+ ions into porewater). The effect of variation in organic matter on soil enzymatic activity was larger than that of AgNPs, as no significant additional inhibitory effect from Ag could be observed. Only at low pH and in the presence of complexing ligands that form very stable Ag complexes (0.4 M Glycine extraction at pH 1.5) up to 58% of the Ag added to soil was released (independently of PVP coating). An extraction with glycine is proposed as a useful indicator of potentially available Ag in soils.

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Section: Potential Availability Of Ag Retained In the Solid Matrixmentioning

confidence: 98%

Section: Potential Availability Of Ag Retained In the Solid Matrixmentioning

confidence: 98%

Section: Analysis Of Soil Exoenzymes Activitiesmentioning

confidence: 99%

See 1 more Smart Citation

Dissolution of Ag Nanoparticles in Agricultural Soils and Effects on Soil Exoenzyme Activities

et al. 2021

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“…Both the simplified bioaccessibility extraction test (SBET) [28] and the unified bioaccessibility method (UBM) [29] have been employed for determining the bioaccessible fraction of PTE in PM [30–34]. In some cases, the PM 10 was obtained from urban soil samples [30, 31] or from urban street dust [32] whilst, in others, filter-based samples were used [33, 34]. A recent study [34] miniaturised the SBET and the stomach phase of the UBM, and successfully applied the methods developed to measure the bioaccessible fraction of PTE in PM 10 supported on TX40 filters employed in the filter dynamics measurement system (FDMS) samplers widely used for continuous monitoring of ambient particulate matter.…”

Section: Introductionmentioning

confidence: 99%

A novel two-step sequential bioaccessibility test for potentially toxic elements in inhaled particulate matter transported into the gastrointestinal tract by mucociliary clearance

2017

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A novel two-step sequential extraction has been developed to assess the bioaccessibility of As, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn in airborne particulate matter following inhalation and transport into the human gastrointestinal tract by mucociliary clearance. A new artificial mucus fluid (AMF) was used to determine the bioaccessible potentially toxic element (PTE) fraction in the upper airways, in sequence with the simplified bioaccessibility extraction test (SBET) or the stomach phase of the unified bioaccessibility method (gastric fluid only) (UBMG). Filter dynamic measurement system TX40 filters smeared with soil reference material (BGS RM 102) were used as test samples. Analysis was performed by ICP-MS. Comparison between results obtained for soil alone and when the soil was supported on TX40 filters indicated that the presence of the substrate did not affect the extraction efficiency, although a large Zn blank was detected. The sequential AMF→SBET extraction liberated similar amounts of Fe, Mn, Ni and Zn to the SBET alone; but significantly less Cd; and significantly more As, Cr, Cu and Pb. The sequential AMF→UBMG extraction liberated similar amounts of Cd, Cr, Mn and Zn to the UBMG alone, but significantly less As, Fe and Ni; and significantly more Cu and Pb. Enhanced extractability was due to the greater quantities of exchangeable ions and complexing agents present. Adoption of a two-step sequential extraction (AMF followed by either the SBET or the UBMG) is recommended because it is more representative of biological conditions and avoids overestimation or underestimation of bioaccessible PTE concentrations. Graphical AbstractSimulated PM10 sample: BGS RM 102 ironstone soil on TX40 filter

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“…20 The bioaccessibility research group of Europe (BARGE) produced a more complex test, the unied bioaccessibility method (UBM), 23 by modifying an in vitro method originally created by researchers at the Netherlands National Institute for Public Health and the Environment. [29][30][31] The SBET 32-40 and the UBM 6, [28][29][30][31]39,41,42 have been employed to determine the bioaccessible PTE fraction in a variety of substrates, notably urban soils, 29,30,32,34,41 soils impacted by mine waste or pesticides and herbicides, [35][36][37]40 and street dust. The UBM was evaluated by means of an international inter-laboratory exercise 25 and validated 26 for As, Cd, Pb and Sb in soils by conducting in vivo swine studies.…”

Section: Introductionmentioning

confidence: 99%

Oral bioaccessibility tests to measure potentially toxic elements in inhalable particulate matter collected during routine air quality monitoring

2016

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The simplified bioaccessibility extraction test (SBET) and the stomach phase of the unified bioaccessibility method (UBM) have been modified for use in assessing the bioaccessibility of potentially toxic elements in samples of PM10 collected during routine air quality monitoring. Arsenic, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn were measured by inductively coupled plasma mass spectrometry in extracts of synthetic PM samples prepared by loading candidate soil reference material BGS102 onto TX40 (Teflon-coated borosilicate) filters widely used in standard commercial tapered element oscillating microbalance/filter dynamics measurement system (FDMS) ambient particulate monitors. Analysis of blanks revealed two important sources of contamination that had to be controlled in order to achieve reproducible results. The syringe filters used in the SBET released Cu and Zn into sample extracts during filtration and had to be washed with 80 mL of 0.4 M glycine at pH 1.5 immediately prior to use, whilst the FDMS filters used to collect PM10 were found to contain sufficient extractable Zn (ca. 3 μg per filter) to almost double the concentration released by the soil. The latter is a consequence of the use of Zn in filter manufacture and so could not be eliminated, but was successfully overcome by means of blank-subtraction. A ten-fold miniaturisation of the SBET and six-fold miniaturisation of the UBM allowed 0.1 g samples to be processed, with analyte recoveries generally within ±10% of those obtained when the conventional procedures were used. Comparison between results obtained when the modified procedures were applied to soil alone, and when soil was loaded onto FDMS filters, indicated that the presence of the filter had no effect on extraction efficiency, except for Fe, provided blank-correction was performed. Results obtained for As, Cd and Pb when the modified UBM was applied to BGS102 on FDMS filters were 4.40 ± 0.04, 0.224 ± 0.002 and 17.3 ± 0.8 mg kg-1, respectively (n = 3), all within recommended ranges

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Testing single extraction methods and in vitro tests to assess the geochemical reactivity and human bioaccessibility of silver in urban soils amended with silver nanoparticles

Cited by 27 publications

References 39 publications

Dissolution of Ag Nanoparticles in Agricultural Soils and Effects on Soil Exoenzyme Activities

Dissolution of Ag Nanoparticles in Agricultural Soils and Effects on Soil Exoenzyme Activities

A novel two-step sequential bioaccessibility test for potentially toxic elements in inhaled particulate matter transported into the gastrointestinal tract by mucociliary clearance

Oral bioaccessibility tests to measure potentially toxic elements in inhalable particulate matter collected during routine air quality monitoring

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