Modelling the risk of Pb and PAH intervention value exceedance in allotment soils by robust logistic regression

Papritz, Andreas; Reichard, P.U.

doi:10.1016/j.envpol.2009.02.032

Cited by 10 publications

(4 citation statements)

References 19 publications

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“…Cultivated urban soils can be contaminated as they are often located on previously urbanized sites and suffer from impact by human activities, such as industrial emissions or road traffic (Leitão 2007;Rodrigues et al 2009;Béchet et al 2009;. Consequently, urban soils can accumulate significant quantities of harmful substances (Papritz and Reichard 2009;El Hamiani et al 2010;Orecchio 2010), such as (i) trace metals or metalloids, e.g., lead, arsenic, copper, mercury, and zinc (Kabata-Pendias 2001;Hursthouse et al 2004;Schwartz et al 2013;Joimel et al 2016), and (ii) polycyclic aromatic hydrocarbons (PAHs) and other persistent organic pollutants (Morillo et al 2007;Cachada et al 2009). In some cases, significant quantities of potentially harmful trace elements may also have a geogenic origin from metalliferous mineralization, resulting in abnormally high concentrations in soils (Ander et al 2013;Karim et al 2014;Jean-Soro et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Spatial variability of trace elements in allotment gardens of four European cities: assessments at city, garden, and plot scale

et al. 2016

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Urban allotment gardens (UAGs) are expandingworldwide, especially in large cities. Environmental pressures(direct and diffuse pollution, gardener practice, geogenic con-tamination) often result in the accumulation of potentiallyharmful trace elements in garden soils. The objectives of thisstudy were to assess the spatial variability of trace elementdistribution in UAGs from city, garden, and plot scale in fourEuropean cities; to provide a baseline understanding and iden-tify abnormal values under environmental pressures; and toevaluate the potential of portable X-ray fluorescence screen-ing as a useful tool in soil management.Materials and methodsThe four cities (Ayr and Greenock(Scotland), Lisbon (Portugal), Nantes (France)) provided awide range of environmental pressures on soils. The loca-tions of the 14 allotment gardens were identified in con-sultation with the local municipality in each city to reflectvarious land uses or according to previous evaluation ofsoil quality. Soil sampling was carried out in 66 plots intotal, from which 3 datasets were produced: (i) basic soilproperties and trace element concentrations from a com-posite sample of topsoil for each plot (trace elements quan-tified by inductively coupled plasma–optical emissionspectrometry/mass spectrometry (ICP-OES/MS) or usingin-lab portable X-ray fluorescence (PXRF); (ii) in situPXRF measurement on composite samples (263 plots inNantes); and (iii) composite samples from 32 small areaswithin 4 plots in one garden of Nantes

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Section: Introductionmentioning

confidence: 99%

Spatial variability of trace elements in allotment gardens of four European cities: assessments at city, garden, and plot scale

et al. 2016

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“…However, urban soils can be contaminated as they are often located on old urban sites, impacted by human activities, such as industrial activities or road traffic (Hough et al 2004;Béchet et al 2009;Schwartz 2009;Uzu et al 2010). Therefore, urban soils can contain high amount of harmful substances (Papritz and Reichard 2009;El Hamiani et al 2010), also found in urban garden, such as (a) trace metals or metalloids, e.g. lead, arsenic, copper, mercury and zinc, and (b) polycyclic aromatic hydrocarbons (PAHs).…”

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confidence: 97%

Origin of trace elements in an urban garden in Nantes, France

et al. 2014

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International audienceDue to their location on old urban sites, impacted by human activities or road traffic, soils in urban gardens are often contaminated with a range of contaminants that could pose health risks. The aim of this study is to determine the origin of high trace element concentrations (arsenic and lead) in an urban community garden.Trace elements were quantified in situ in the topsoil (0–20 cm) of the 95 plots of the garden and in four soil profiles, using a portable X-ray fluorescence spectrometer. The accuracy of the spectrometer results was checked by measuring trace element concentrations by inductively coupled plasma mass spectrometry (ICP-MS) after an acid digestion (HF and HClO4). Leafy and root vegetables were sampled to assess lead transfer in vegetables. The accumulation of lead in vegetables was measured by ICP-MS after an aqua regia digestion. The bioaccessibility of lead was estimated by a calcium chloride extraction.Three anomaly levels could be defined from the mapping of arsenic and lead on the whole garden. The increase of trace elements content with depth, in correlation with pedological/geological characteristics, supports the hypothesis of a geogenic origin of these anomalies. The enrichment of the topsoil is related to the pedogenesis of soil, from micaschists as parent material. The geogenic origin of lead does not prevent its accumulation by vegetables.Although trace element anomalies have generally an anthropogenic origin, some anomalies may also have a natural (geogenic) origin, as shown in this study. The comprehension of lead origin, the mapping of its spatial distribution in the garden and the characterisation of its accumulation in vegetables were used as a basis for operational decisions including soil management. X-ray fluorescence spectrometry is a well-adapted method for this purpose. It allows an in situ and fast semiquantitative investigation on a lot of sampling points, saving time and laboratory analysis cost

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“…In the last decade, logistic regression has been applied in fields such as microbiology [28,29], epidemiological studies [30,31], environmental issues [32,33], and catalysis [34]. The use of logistic regression seems to be quite suitable for the cases with the outcome variable having only two possible values such as stable-unstable and weak-strong adsorption as in the present work.…”

Section: Introductionmentioning

confidence: 93%

Analysis of O2 Adsorption Stability and Strength Over Gold Clusters Using DFT and Logistic Regression

2011

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In this work, the stability and strength of O 2 adsorption over Au 2-10 clusters were studied. The density functional theory (DFT) computed adsorption data were classified using multiple logistic regression. The effects of user defined descriptors were analyzed and it was found that stable O 2 adsorption requires the presence of an unpaired electron while its strength depends on the size and the charge of the cluster. As the size of the cluster increases, the probability of strong adsorption decreases, and the odds of finding strong adsorption is higher for the anionic clusters compared to neutral and cationic clusters. The effects of the electronic properties were also studied and HOMO-LUMO gap was found to be the most significant property determining the stability of O 2 adsorption; as its value increases, the probability of stable adsorption decreases. The strength of the adsorption, on the other hand, was found to be mostly dependent on the ionization potential, which has a negative effect.

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Modelling the risk of Pb and PAH intervention value exceedance in allotment soils by robust logistic regression

Cited by 10 publications

References 19 publications

Spatial variability of trace elements in allotment gardens of four European cities: assessments at city, garden, and plot scale

Spatial variability of trace elements in allotment gardens of four European cities: assessments at city, garden, and plot scale

Origin of trace elements in an urban garden in Nantes, France

Analysis of O2 Adsorption Stability and Strength Over Gold Clusters Using DFT and Logistic Regression

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