The effects of atmospheric fluoride

The effects of atmospheric fluoride compoundson plants are well documented (Thompson et al.,1979; Sun and Su, 1985; Haidouti et al., 1991;1993) and the behavior and effects of fluoridecontaminants in soils has recently been examinedmore closely.Soil is polluted by fluoride either by the directabsorption of gases, such as hydrogen fluorideand silicon tetrafluoride, or by the deposition of particulate matter, such as cryolite and fluorsparas well as fluoride contaminated litter. Even when soil F has no immediate effect on plant growth,its water-soluble fraction might disturb the soil environment in other ways. A few studies suggest this type of fluoride ecological failure. Polomskiet al.(1982) observed that fluoride containing solutions induce substantial losses of organic matter,Al and Fe. Buhlmann (1978), concludes that atmospheric F affects humification. According to Dhruva and Dhirendra (1978), F inhibits decomposition of organic matter, while according to Hani (1975) F mobilizes organic constituents and trace elements from the solid phase, making them available for plant uptake. The level of F accumulation is an expression of cumulated gains and losses. In order to appreciate the role and to estimate the residence time of airborne F in soil it is essential to know the mechanisms and soil characteristics that control
its transport.The objective of this study was to demonstrate the effects of fluoride pollution on the mobilization and leaching of aluminum in soils.

ผลลัพธ์ (อังกฤษ) 2:

The effects of atmospheric fluoride compoundson plants are well documented (Thompson et al., 1979; Sun and Su, 1985; Haidouti et al., 1991; 1993) and the behavior and effects of fluoridecontaminants in soils has recently been examinedmore closely.Soil is. polluted by fluoride either by the directabsorption of gases, such as hydrogen fluorideand silicon tetrafluoride, or by the deposition of particulate matter, such as cryolite and fluorsparas well as fluoride contaminated litter. Even when soil F has no immediate effect on plant growth, its water-soluble fraction might disturb the soil environment in other ways. A few studies suggest this type of fluoride ecological failure. Polomskiet al. (1982) observed that fluoride containing solutions induce substantial losses of organic matter, Al and Fe. Buhlmann (1978), concludes that atmospheric F affects humification. According to Dhruva and Dhirendra (1978), F inhibits decomposition of organic matter, while according to Hani (1975) F mobilizes organic constituents and trace elements from the solid phase, making them available for plant uptake. The level of F accumulation is an expression of cumulated gains and losses. In Order to appreciate the role and Residence to Estimate the time of airborne F in soil it is Essential to know the soil characteristics that Control Mechanisms and
its Transport.The Objective of this Study was to demonstrate the effects of fluoride Pollution on the mobilization and leaching. of aluminum in soils.