Fluoride in Volcanic Areas: A Case Study in Medical Geology

Linhares, Diana; Garcia, Patrícia; Rodrigues, Armindo dos Santos

doi:10.5772/intechopen.86058

Cited by 3 publications

(2 citation statements)

References 39 publications

(42 reference statements)

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“…16 Due to geogenic causes, the distribution of fluoride in the environment is unbalanced. 17 Fluoride has a strong liking for the acquisition of electrons, hence the formation of negative fluoride ions (F -). As a result, fluoride forms composites with numerous positively charged ions, which constitute about 0.75% of the earth's crust.…”

Section: Introductionmentioning

confidence: 99%

Defluoridation of water through the application of carbonised bone as a green adsorbent: A review

Moloi,

Okonkwo,

Jansen

2024

S. Afr. J. Sci.

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Flouride contamination of water is recognised as a serious challenge facing humanity. Consumption of water that contains excessive amounts of fluoride can result in fluorosis. Consequently, concerted efforts have been made to develop cheap, effective and green techniques/materials to remove fluoride from water, particularly potable water. Bone char prepared from bovine, swine, and equine bones has been used extensively in this regard, and is the most promising, cheap and green material for treating drinking water with high fluoride concentration, particularly in developing countries. However, research on bone char prepared from bones of animals in the wild, as well as those from domestic and semi-wild animals treated with antibiotics to enhance growth, has been scanty. Such research is important as the use of antibiotics may alter the composition of bones, and thus their potential as a green adsorbent to remove fluoride may be impaired. Furthermore, little attempt has been made so far to package char bones for easy application domestically, particularly in rural communities.

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Section: Introductionmentioning

confidence: 99%

Defluoridation of water through the application of carbonised bone as a green adsorbent: A review

Moloi,

Okonkwo,

Jansen

2024

S. Afr. J. Sci.

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“…Fluoride is a naturally occurring mineral that is released into the soil, water, and air by rocks (1). Fluoride can be found in all-natural water sources in quantities ranging from barely detectable to more than ten parts per million (ppm).…”

Section: Introductionmentioning

confidence: 99%

Determination of Fluoride in Gravity Feed System Water and Health Risk Assessment of Exposure to Fluoride among Indigenous People in Sungai Mas, Pahang

Faizul,

Mohd Sham

2023

MJMHS

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Introduction: To determine fluoride levels in gravity feed system water of Sungai Mas Village in Sungai Lembing, Kuantan, and its related potential health risk due to fluoride exposure from drinking water among adult indigenous people in the area. Methods: Adults who have lived in Sungai Mas Village, Pahang, for more than one year and use gravity feed system water as a drinking water source were selected as respondents. A set of questionnaires was used to determine socio-demographic and information on gravity feed system water usage among the respondents. A handheld Fluoride low-range (LR) Color-imeter and a portable pH meter were used to measure fluoride levels and pH in water samples, respectively. A body weight scale was used to measure the weight of respondents. Results: A total of 80 indigenous people in Sungai Mas Village were chosen as respondents. From 80 water samples col-lected, 98.75% had fluoride lower than the Malaysian National Standard for Drinking Water Quality’s permissible level (0.4 – 0.6 mg/L), while 1.25% had a fluoride level within the said level. Fluoride ranged from 0.10 to 0.41 mg/L, while pH ranged from 7.67 to 8.20, meaning 100% of the water samples had pH within the permissible level. The Hazard Quotient (HQ) was less than 1 (HQ < 1). Conclusion: Water samples in the study area had low natural fluoride, which is insufficient to eradicate dental caries. Meanwhile, the value of the hazard quotient suggests that adults in Sungai Mas Village may not be at risk of developing dental and skeletal fluorosis.

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Trace Elements in Volcanic Environments and Human Health Effects

Linhares¹,

Garcia²,

Rodrigues³

2021

Trace Metals in the Environment - New Approaches and Recent Advances

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Trace elements play an essential role in the normal metabolism and physiological functions of living beings. The distribution and concentration of trace elements in the environment results from both anthropogenic and natural origins; this chapter will focus on volcanism as one of the major natural sources of trace elements. In volcanic areas, the emissions and deposits of volcanogenic elements are key factors for geochemical mobility of trace elements and their distribution in the environment and, their effects on animals and human health. Volcanic areas have been associated with increased incidence of several diseases, such as fluorosis or even some types of cancer, leveraging the studies on the potential of this natural phenomenon as a promoter of diseases. As the Azores Archipelago is a volcanic area, with several manifestations of active volcanism, this region presents itself as an ideal study scenario for a multidisciplinary approach on environmental health problems, such as the exposure to toxic and/or deficient levels of trace elements. This chapter will present an integrated approach, describing the occurrence, the monitoring of trace elements and their characterization, the biological role in human body, and the human biomonitoring and health risk assessment, using case studies as examples.

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Fluoride in Volcanic Areas: A Case Study in Medical Geology

Cited by 3 publications

References 39 publications

Defluoridation of water through the application of carbonised bone as a green adsorbent: A review

Defluoridation of water through the application of carbonised bone as a green adsorbent: A review

Determination of Fluoride in Gravity Feed System Water and Health Risk Assessment of Exposure to Fluoride among Indigenous People in Sungai Mas, Pahang

Trace Elements in Volcanic Environments and Human Health Effects

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