Lead Exclusion and Copper Translocation in Black Spruce Needles

Aznar, Jean-Christophe; Richer-Laflèche, Marc; Bégin, Christian; Bégin, Yves

doi:10.1007/s11270-009-9997-8

Cited by 22 publications

(17 citation statements)

References 36 publications

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“…Moreover, some recent data for the black spruce needles supported the previous hypothesis and confirmed that an active translocation of essential metals, particularly Cu, takes place from senescent to non-senescent parts of a plant. However, the results for Pb, as a nonessential metal, were in accordance with a hypothesis that the passive sequestration of toxic metals was attained in the senescing foliage as a detoxification process (Aznar et al, 2009).…”

Section: Trace Elements In Tree Leavessupporting

confidence: 86%

Trace Elements and Radionuclides in Urban Air Monitored by Moss and Tree Leaves

Popović¹,

Todorović²,

Aničić³

et al. 2010

Air Quality

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Due to changed atmospheric concentrations of trace elements, their availability and cycling has changed, too. Numerous studies showed that trace metals as persistent, widely dispersed and interacting with different natural components, cause threat to human health and environment (Seinfeld & Pandis, 1998). Trace elements in urban areas (such as Cu, Zn, and Pb) are mainly emitted by traffic, including exhaust emissions and vehicle wear products (Harrison et al., 2003). Even though the use of leaded gasoline has been drastically reduced, our understanding of the effects of whole lead emission to air is far from sufficient (Van der Gon & Appelman, 2009). As reported recently, though atmospheric Pb had declined by a factor of 7 from 1980 to 2007, atmospheric deposition is still recognised as a major pathway of Pb to vegetation and topsoil (Hovmand et al., 2009). Since it offers a practical approach for monitoring deposition of atmospheric trace elements on the surface environment (Azimi et al., 2003; Tasić et al., 2008), collection of atmospheric deposition using bulk sampling devices has been extensively used. However, instrumental studies on atmospheric contamination are often limited by high cost and difficulties in carrying out extensive monitoring surveys in time and space, and do not offer reliable information about an impact of atmospheric pollutants on the living systems. Among the naturally occurring radionuclides in air, beryllium-7, radon and its short lived progenies are most significant, while caesium-137 is of major interest among the fission products. Long-lived radionuclides, potassium-40, uranium and thorium, found in 6 www.intechopen.com

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Section: Trace Elements In Tree Leavessupporting

confidence: 86%

Trace Elements and Radionuclides in Urban Air Monitored by Moss and Tree Leaves

Popović¹,

Todorović²,

Aničić³

et al. 2010

Air Quality

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“…In case of the walnut trees, the concentration of Cu in old leaves was just 8% of the maximum Cu value measured in the younger mature leaves [23]. Also, some recent data for the black spruce needles, supporting a previous hypothesis, confirmed that an active translocation of essential metals, particularly Cu, takes place from senescent to nonsenescent parts of a plant [24]. The authors also pointed that, on the contrary, the results obtained for Pb, as nonessential metal, were in accordance with a hypothesis that the passive sequestration of toxic metals was attained in the senescing foliage as a detoxification process.…”

Section: Total Element Content In Leaves and Comparison With Bulk Depsupporting

confidence: 68%

Trace element content in urban tree leaves and SEM-EDAX characterization of deposited particles

Tomašević

Aničić

2010

Facta Univ., Phys. Chem. Technol.

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Leaves of common deciduous trees: Aesculus hippocastanum and Tilia spp. from three parks within the urban area of Belgrade (Serbia) were studied as biomonitors of trace elements (V, Cr, Fe, Ni, Cu, Zn, As, Cd, and Pb) air pollution. Using a scanning SEM-EDAX, the size, size distribution, morphology and chemical composition of individual particles were examined on adaxial and abaxial surfaces of the leaves. Morphological and chemical composition indicated that the most abundant particles were soot and dust with minor constituents such as Pb, Zn, Ni, V, Cd, Ti, As, and Cu. Total element concentrations in the leaves were determined by ICP-OES and ICP-MS. This investigation included spatial, seasonal, and temporal variations in leaves of the selected species. The leaves of A. hippocastanum showed a significantly higher elements concentration and more consistency in trend of element accumulation during the vegetation season in the period 2002-2006 than Tilia spp., so it may be considered as a more suitable species for the assessment of trace element atmospheric pollution, especially Pb and Cu which correlated with the bulk deposition data

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“…Popović et al (2010) and Tomašević et al ( 2011 ) found that the seasonal accumulation of the examined elements in leaves of Aesculus hippocastanum L. was more regular. Aznar et al ( 2009 ) supposed that Pb, as a nonessential metal, remained in the foliage as part of a detoxification process. Hovmand et al ( 2009 ) studied the origin of Pb in Norway spruce and Tomašević and Aničić ( 2010 ) the origin of Pb in horse chestnut tree leaves.…”

Section: Discussionmentioning

confidence: 99%

Foliar dust and heavy metal deposit on leaves of urban trees in Budapest (Hungary)

Hrotkó

Gyeviki

Sütöriné

et al. 2020

Environ Geochem Health

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This work considers dust deposition and the heavy metal (HM) content on leaves of urban trees (Acer platanoides L. ‘Globosum,’ Fraxinus excelsior L. ‘Westhof’s Glorie’ and Tilia tomentosa Moench.) in order to estimate the trees’ capacity to remove dust and HM from the air. Leaves were collected from the Buda Arboretum and from different streets of heavy traffic in Budapest, Hungary, during 2015 and 2016. At each site, five trees were sampled by collecting 6 leaves from each tree from the height of 2–3 m. Dust deposits on the leaves were removed by soaking the fresh foliage in distilled water for 20 h and then washed with ultrasound shaking. Afterward, the leaves were dried to constant weight and then they were digested in nitric acid–hydrogen peroxide treatment, and their Pb, Fe, Ni, Zn and Cu contents were measured using an inductively coupled plasma (ICP AS) spectrometer. The removed dust deposit was dried, and after a similar digestion treatment the Pb, Fe, Ni, Zn and Cu contents were measured using an AURORA AI 1200 AAS appliance. The HM deposit was calculated in mg m–2 leaf surface area. In 2015, the amount of foliar dust deposit from spring to autumn increased from 86.3 to 270.2 mg m–2. The most efficient tree species in trapping dust on their leaves was the silver linden (98.5–123.5 mg m−2), followed by the Norway maple (74.2–84.8 mg m−2) and the common ash (62.8–74.6 mg m−2). The deposit of HM elements showed seasonal differences: the quantity of Fe and Pb deposit on autumnal leaves increased five- to tenfold, while other heavy metals did not show accumulation. Silver linden with its pubescent (hairy) leaf surface proved to be most efficient in entrapping and retaining dust and heavy metals. The 60–100% higher Pb and Fe content of autumnal leaves indicate that over the season leaves may absorb Fe and Pb from the foliar dust. Our results confirmed that the foliar dust is a potential indicator for monitoring the HM content in the air. We also show that foliar dust deposits should be considered when estimating the capacity of urban trees to clean the air.

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Lead Exclusion and Copper Translocation in Black Spruce Needles

Cited by 22 publications

References 36 publications

Trace Elements and Radionuclides in Urban Air Monitored by Moss and Tree Leaves

Trace Elements and Radionuclides in Urban Air Monitored by Moss and Tree Leaves

Trace element content in urban tree leaves and SEM-EDAX characterization of deposited particles

Foliar dust and heavy metal deposit on leaves of urban trees in Budapest (Hungary)

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