Flourine Content of Certain Vegetation in Western Pennsylvania Area

Churchill, H. V.; Rowley, Rex J.; Martin, Laure

doi:10.1021/ac60013a018

Cited by 27 publications

(7 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pickering (1985) had reported fragments of minerals such as apatite, cryolite, fluorite or fluorspar and topaz as the main source of fluoride in soil. Coal also contains around 295 ppm of fluorine (Churchill et al 1948). Further, Jacks et al (1993) have also observed the occurrence of few percent of fluorine in calcrete and dolocrete.…”

Section: Geogenic Sourcesmentioning

confidence: 90%

Worldwide contamination of water by fluoride

et al. 2016

View full text Add to dashboard Cite

Fluoride contamination in water is a major problem across the globe, with health hazards such as dental and skeletal fluorosis. Most earlier studies are confined to local or regional scales. As the problem has serious socioeconomic implications, there is a need for a global perspective. Thus, here we review worldwide research for nearly a century on fluoride contamination in water. We investigated the distribution of fluoride contamination in water, its sources, mobilization and association. The major findings are: (1) Anomalous fluoride concentration in groundwater is mainly confined to arid and semiarid regions of Asia and North Africa. (2) The geogenic sources of fluoride in water are mainly fluorine-bearing minerals in rocks and sediments, whereas anthropogenic sources of fluoride in water are mainly pesticides and industrial waste.(3) Fluoride mobilization from geogenic sources is mainly controlled by alkalinity and temperature. (4) Fluoride occurrence in water is associated with ions such as sodium, arsenic chloride and bicarbonate. There are few associations of fluoride in water with calcium and magnesium.

show abstract

Section: Geogenic Sourcesmentioning

confidence: 90%

Worldwide contamination of water by fluoride

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Dependable technique for complete analytical expulsion of fluorine from charges of soils to afford utilization of the Willard and Winter thorium nitrate titrative procedure (76) on the resultant distillates is of relatively recent origin (11,25,39,40,44)• Incidence of substantial proportions of magnesium and imposition of unduly high temperature in the prefatory calcination of the limed charge of soil induce fixation of its fluorine content in forms that retain the element against perchloric acid distillation (40).…”

Section: Occurrence Of Fluorinementioning

confidence: 99%

Effects of Fluorine in Tennessee Soils and Crops

Associates¹

1949

Ind. Eng. Chem.

View full text Add to dashboard Cite

The briefed findings are from 20-year laboratory, lysimeter, and pot-culture experiments on the chemical and biochemical behavior and the fate of fluorine after it reaches soils through insecticides, fertilizers, cryolite, rock phosphate, various fluorides and silicofluorides, slag, and rain waters, and from the atmosphere, and in particular the migration of the element from soil into vegetation. Through collaboration with TVA and two major manufacturing corporations, the experiments were elaborated to include studies of injurious effects upon plant and animal life purportedly resultant to fluoric effluents from two manufacturing operations in two widely separated locales in Tennessee. Soils were found to possess remark-THE utility of fluorine compounds as dusts and sprays for insect control on field crops long has been under study at The University of Tennessee {52). Virtually nothing was known, INDUSTRIAL AND ENGINEERING CHEMISTRY Vol. 41, No. 11 Uniformity in Growth of Soybeans initial crop) after identical inputs of fluorine, 300 pounds per 3,000,000 pounds of limestoned Hartsells fine sandy loam (top row) and of limestoned Clarksville silt loam (bottom row) at Knoxville A, Magnesium fluoride 3. Sodium fluoride C, Sodium silicofluoride D. Untreated

show abstract

“…Thus, weathering and leaching of fluoride-bearing minerals are the primary sources of geogenic contamination and are typically associated with low calcium and high bicarbonate ions [4,7]. Churchill et al [8] stated that coal also contains 295 mg L −1 of fluorine. Precipitation and air deposition are also geogenic sources of fluoride with concentrations in the range 0.00001 to 0.0004 mg L −1 or lower, as the fluoride analytical detection limit is 0.089 mg L −1 [9].…”

Section: Introductionmentioning

confidence: 99%

Bioaccumulation of Fluoride in Plants and Its Microbially Assisted Remediation: A Review of Biological Processes and Technological Performance

et al. 2021

View full text Add to dashboard Cite

Fluoride is widely found in soil–water systems due to anthropogenic and geogenic activities that affect millions worldwide. Fluoride ingestion results in chronic and acute toxicity, including skeletal and dental fluorosis, neurological damage, and bone softening in humans. Therefore, this review paper summarizes biological processes for fluoride remediation, i.e., bioaccumulation in plants and microbially assisted systems. Bioremediation approaches for fluoride removal have recently gained prominence in removing fluoride ions. Plants are vulnerable to fluoride accumulation in soil, and their growth and development can be negatively affected, even with low fluoride content in the soil. The microbial bioremediation processes involve bioaccumulation, biotransformation, and biosorption. Bacterial, fungal, and algal biomass are ecologically efficient bioremediators. Most bioremediation techniques are laboratory-scale based on contaminated solutions; however, treatment of fluoride-contaminated wastewater at an industrial scale is yet to be investigated. Therefore, this review recommends the practical applicability and sustainability of microbial bioremediation of fluoride in different environments.

show abstract

Flourine Content of Certain Vegetation in Western Pennsylvania Area

Cited by 27 publications

References 4 publications

Worldwide contamination of water by fluoride

Worldwide contamination of water by fluoride

Effects of Fluorine in Tennessee Soils and Crops

Bioaccumulation of Fluoride in Plants and Its Microbially Assisted Remediation: A Review of Biological Processes and Technological Performance

Contact Info

Product

Resources

About