Effects of fluoride and acidity on early plant growth

Horner, Jonathan M.; Bell, J.N.B.

doi:10.1016/0167-8809(94)00533-k

Cited by 22 publications

(8 citation statements)

References 15 publications

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“…Unlike the case of fluoride that is emitted by a fewer industries such as the aluminum ones, there are many anthropogenic sources that acidify rain water (Horner and Bell, 1995). Nitrogen and sulphur oxides are the major sources of atmospheric acidity; both are products of combustion, and both are converted in the atmosphere to strong acids, mainly nitric and sulphuric acids that acidify the rain water (Cowling and Linthurst, 1981).…”

Section: Introductionmentioning

confidence: 99%

Effects of simulated acid rain on leaf anatomy and micromorphology of Genipa americana L. (Rubiaceae)

Sant’Anna-Santos

Silva

Azevedo

et al. 2006

Braz. arch. biol. technol.

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Section: Introductionmentioning

confidence: 99%

Effects of simulated acid rain on leaf anatomy and micromorphology of Genipa americana L. (Rubiaceae)

Sant’Anna-Santos

Silva

Azevedo

et al. 2006

Braz. arch. biol. technol.

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“…In areas subject to fluorine emissions adverse effects have been observed in the bone system of both animals and humans. One should also note the behaviour of fluorine in the soil (Horner & Bell, 1995;Pickering, 1985). It forms many complex ions (AlF 2+ , AlF 4− ) which start to migrate and a substantial proportion of them enter groundwater (Saether, Andreassen, & Semb,1995).…”

Section: Introductionmentioning

confidence: 99%

Variations in the Fluoride Level in Precipitation in a Region of Human Impact

Walna

Kurzyca

Siepak

2007

Water Air Soil Pollut: Focus

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The research concerns the Wielkopolski National Park (West Poland), which suffered a huge human impact in the 1970s and 1980s owing to the nearby location of an industrial plant. Since then, fundamental technological changes that it introduced into its production of phosphate fertilizers have radically reduced the amount of pollution emitted. A three-year study (2002)(2003)(2004) of fluorides in precipitation in open terrain and under tree crowns showed their concentrations to range from levels below the detection limit (0.003 mg/l) to 0.560 mg/l. Those registered under tree crowns were several times higher and indicated substantial dry deposition of fluorides on the trees. The highest values were recorded in 2003, with 43% of samples ranging from 0.01 to 0.05 mg/l, and with 51% of throughfall ranging from 0.10 to 0.50 mg/l. A strong connection was shown to exist between fluoride and sulphate concentrations in the precipitation. An analysis was made of the available data on F concentrations in the air and the dust levels around the factory, but these figures did not show an unequivocal effect on F concentrations in precipitation. A great similarity was found to occur between the fluoride content in rainwater in the Wielkopolski National Park and in the centre of the nearby Poznań metropolitan area, which indicates that there are also other F sources besides the local factory.

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“…Toxic effects in the aquatic environment have also been reported (Camargo 2003; Zhang et al 2007). One should also note the behavior of F − in soil (Horner and Bell 1995; Koblar et al 2011; Walna 2007). F − forms many complex ions, e.g., AlF x (3-x) (Frankowski and Ziola-Frankowska 2010), that migrate, and a substantial proportion of these enter groundwater (Saether et al 1995a).…”

Section: Introductionmentioning

confidence: 99%

Fluoride pollution of atmospheric precipitation and its relationship with air circulation and weather patterns (Wielkopolski National Park, Poland)

Walna

Kurzyca

Bednorz

et al. 2012

Environ Monit Assess

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A 2-year study (2010–2011) of fluorides in atmospheric precipitation in the open area and in throughfall in Wielkopolski National Park (west-central Poland) showed their high concentrations, reaching a maximum value of 2 mg/l under the tree crowns. These high values indicate substantial deposition of up to 52 mg/m2/year. In 2011, over 51 % of open area precipitation was characterized by fluoride concentration higher than 0.10 mg/l, and in throughfall such concentrations were found in more than 86 % of events. In 2010, a strong connection was evident between fluoride and acid-forming ions, and in 2011, a correlation between phosphate and nitrite ions was seen. Analysis of available data on F− concentrations in the air did not show an unequivocal effect on F− concentrations in precipitation. To find reasons for and source areas of high fluoride pollution, the cases of extreme fluoride concentration in rainwater were related to atmospheric circulation and weather patterns. Weather conditions on days of extreme pollution were determined by movement of weather fronts over western Poland, or by small cyclonic centers with meteorological fronts. Macroscale air advection over the sampling site originated in the western quadrant (NW, W, and SW), particularly in the middle layers of the troposphere (2,500–5,000 m a.s.l.). Such directions indicate western Poland and Germany as possible sources of the pollution. At the same time in the lower troposphere, air inflow was frequently from the north, showing short distance transport from local emitters, and from the agglomeration of Poznań.

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Effects of fluoride and acidity on early plant growth

Cited by 22 publications

References 15 publications

Effects of simulated acid rain on leaf anatomy and micromorphology of Genipa americana L. (Rubiaceae)

Effects of simulated acid rain on leaf anatomy and micromorphology of Genipa americana L. (Rubiaceae)

Variations in the Fluoride Level in Precipitation in a Region of Human Impact

Fluoride pollution of atmospheric precipitation and its relationship with air circulation and weather patterns (Wielkopolski National Park, Poland)

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