Factors influencing natural occurrence of fluoride-rich groundwaters: a case study in the southeastern part of the Korean Peninsula

Kim, Kangjoo; Jeong, Gi Young

doi:10.1016/j.chemosphere.2004.10.002

Cited by 222 publications

(104 citation statements)

References 11 publications

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“…Higher contents ([1.5 mg/L) pose a threat to human health, and can cause severe health problems such as dental and skeletal fluorosis, particularly in arid and semi-arid regions of the world. For example, F problems occur in some regions of India, China, the Korean Peninsula, East and North Africa, the United Kingdom, and the Western United States (Ayoob and Gupta 2006;Chae et al 2007;Harrison 2005;Jacks et al 2005;Kim and Jeong 2005;Reddy et al 2010;Xiong et al 2007;Zhu et al 2007). Conversely, water fluoridation is necessary in Australia, New Zealand, Canada, and most South American countries, due to lack of natural fluoride.…”

Section: Introductionmentioning

confidence: 99%

Occurrence of fluoride in ground waters of Saudi Arabia

2013

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The presence of elevated levels of fluoride in groundwater is considered a global problem. Fluoride in water derives mainly from dissolution of natural minerals in the rocks and soils with which water interacts. The most common fluorine-bearing minerals are fluorite, apatite and micas. Anthropogenic sources of fluoride include agricultural fertilizers and combustion of coal. In the present research, a survey of wells (n = 1,060) was undertaken in all the 13 regions of the Kingdom of Saudi Arabia to assess the contained fluoride (F) levels. The results indicated variation in fluoride levels from 0.10 to 5.4 mg/L as F throughout the kingdom. The average fluoride levels in milligrams per liter as F were as follows in descending order: 1.80 (Hadwood Shamalyah), 1.37 (Hail), 1.33 (Eastern Province), 1.16 (Al Jouf), 1.11 (Qassim), 1.01 (Riyadh), 0.90 (Madina Al Munnawara), 0.81 (Tabouk), 0.74 (Makkah Al-Mukaramma), 0.73 (Jizan), 0.66 (Asir), 0.64 (Najran), and 0.60 (Al Baha). The results indicated that fluoride levels exceeded the USEPA maximum contaminant limits for drinking water (4 mg/L) in several wells (n = 7) in different regions of the kingdom and that 13.96 % of the wells exceeded the World Health Organization recommended levels (1.5 mg/L). The results were also compared with the secondary USEPA contaminant standards of 2.0 mg/L for fluorides.

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Section: Introductionmentioning

confidence: 99%

Occurrence of fluoride in ground waters of Saudi Arabia

2013

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“…Um primeiro mecanismo provoca o enriquecimento da água nesse íon a partir da liberação de fl úor presente em minerais ricos nesse elemento (Ampabire et al., 1997;Banks et al, 1998;Kim & Jeong, 2005;Chae et al, 2007;Nanni, 2008). Um segundo mecanismo está associado à percolação de fl uidos hidrotermais ricos em fl úor (Allmann & Koritnig, 1969;Fraga, 1992;Ribeiro, 1992).…”

Section: Discussõesunclassified

“…Na fl uorapatita/fosforita (Ca 5 (PO 4 ) 3 (F,OH), nos hidroxi-silicatos e hidroxi-alumino-silicatos, como os anfi bólios e as micas e, nos argilominerais como illita, esmectita, clorita, OH -pode ser substituído por F -devido à similaridade de seus raios iônicos (OH -=1,32 Å e F -=1,36 Å) (Allmann & Koritnig, 1969;Boyle, 1992;Ampabire et al, 1997Banks et al, 1998Kim & Jeong, 2005;Panagoulias & Silva Filho, 2006;Chea et al, 2007). Em vários estudos, a presença de F -, nas águas subterrâneas, é atribuída à solubilização de minerais ricos em fl úor presentes nas rochas, manto de alteração, veios ou preenchendo fraturas (Apambire et al, 1997;Kim & Jeong, 2005;Chae et al, 2006;Mariomon, 2006;Panagoulias & Silva Filho, 2006;Silvério da Silva et al, 2006;Velásques et al, 2006;Chae et al, 2007;Kern et al , 2008).…”

Section: Discussõesunclassified

“…Essas anomalias também foram descritas por diversos autores em águas bicarbonatadas sódicas, sulfatadas ou cloretadas sódicas (Szikszay et al, 1981;Kimmelmann & Silva, 1990;Fraga, 1992;Ampabire et al, 1997;Banks et al, 1998;Kim & Jeong, 2005;Guo et al, 2007;Nanni, 2008, entre outros). Chae et al (2007) observou que a concentração de fl uoretos decresce na seqüência de grupo de classifi cação de águas: Na-HCO 3 >> Na-(SO 4 )-Cl >> Ca-(SO 4 )-Cl  Ca-HCO 3 .…”

Section: Tabela 2 -Dados Analíticos De Poços-cacimba De Saltounclassified

“…Águas com elevadas concentrações de fl uoreto ocorrem em diversas regiões no mundo e sua presença, normalmente, está associadas a: 1) rochas graníticas e gnáissicas (Índia, Paquistão, África Oeste, Tailândia, China, Coréia, Sri Lanka, Sul da África; EUA, Reino Unido e Noruega); 2) rochas vulcânicas (Rift do Leste Africano, com até 690mg.L -1 de fl úor, Vale da Jordânia; Sudão, Etiópia, Uganda; Índia, Havaí); 3) sedimentos de origem marinha em áreas montanhosas (Irâ-Síria, Turquia, Iraque até a região mediterrânea, Argélia e Marrocos, sul dos EUA, sul da Europa e sul da USSR) (Hem, 1985;Garici & Davies, 1993;Ampabire et al, 1997;Banks et al, 1998;Kim & Jeong, 2005;WHO, 2006;Ozsvath, 2006;Guo et al, 2007;Chae et al, 2007).…”

Section: Introductionunclassified

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Fluoreto nas águas subterrâneas dos aqüíferos Tubarão e Cristalino, região de Salto-Indaiatuba (SP)

Hypólito

Ezaki

Pérez-Aguilar

2010

Rem: Rev. Esc. Minas

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ResumoNa região de Salto-Indaiatuba, SP, foram detectadas concentrações anômalas de fl uoreto (> 1,5 mg dm -3 ) em águas de 19 poços tubulares profundos, com valores médios de 3,03 mg dm -3 e máximo de 6,95 mg dm -3, constituindo restrição ao uso das águas para consumo humano. Os poços extraem água dos Aqüíferos Tubarão (sedimentar, granular) e Cristalino (granítico, fi ssural) e são utilizados para fi ns sanitários e/ou em processos industriais. Suas águas são predominantemente do tipo bicarbonatadas e bicarbonatadas-sulfatadas, com altas concentrações de HCO 3 -e Na + e valores de pH entre 7,5 e 10,0. As maiores concentrações de F -ocorrem em poços dos Aqüíferos Tubarão e Tubarão/Cristalino. A presença do íon F -em águas subterrâneas é controlada por elevados valores de pH, alcalinidade e disponibilidade de fl úor. A fonte de fl uoreto nos Aqüíferos Tubarão e Cristalino pode estar associada à percolação de fl uidos hidrotermais relacionada aos derrames de lava do Mesozóico associados à abertura do Atlântico Sul e/ou hidrólise de minerais e argilominerais ricos em fl úor. Palavras

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Factors controlling groundwater chemistry in an agricultural area with complex topographic and land use patterns in mid‐western South Korea

Koh

Kim

Ryu

et al. 2009

Hydrological Processes

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Abstract:Shallow and bedrock groundwater from granitic aquifers were investigated for the hydrogeochemistry of major and minor constituents in an agricultural area. Nitrate concentrations were observed up to 49 mg/l as NO 3 -N, with 22% of samples exceeding the drinking water standard, which could pose a significant threat because most residents rely on groundwater as their drinking water source. Principal component analysis revealed three principal components (PCs): (1) nitrate contamination, contributed by major cations, Cl , SO 2 4 and NO 3 , (2) reduction processes positively involving Fe, Mn and B, and negatively involving dissolved oxygen and NO 3 and (3) natural mineralization, involving HCO 3 and F . Cluster analysis, performed on the PC scores, resulted in seven sample groups, which were successfully identified by total depth, elevation and land use. The nitrate-contaminated groups had mixed land uses, with locally concentrated residential areas. Uncontaminated groundwater groups were found in the natural environment, including high-altitude spring water and bedrock groundwater with a higher degree of natural mineralization. Shallow groundwater groups in paddy fields in lowlands were affected by reducing environments, of which one group was characterized by high Fe, Mn and B, and negligible nitrate. Groundwater with intermediate nitrate and lower Cl and SO 2 4 was found primarily in hilly terrains with orchards and vegetable gardens, indicating lower contaminant loadings than lowland areas. Higher concentrations of F and nitrate were observed in the nitrate-contaminated water, which seemed unlikely to be explained by groundwater mixing. The strong acidity generated from nitrification may infiltrate deeper into the aquifer, induce accelerated weathering of bedrock and result in the coexistence of F and nitrate, which may be an evidence of intense nitrate loading, leading to soil acidification. Multivariate statistical analysis successfully delineated hydrochemical characteristics of groundwater attained by natural and anthropogenic processes in an agriculturally stressed area with complex topographic land use patterns.

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Factors influencing natural occurrence of fluoride-rich groundwaters: a case study in the southeastern part of the Korean Peninsula

Cited by 222 publications

References 11 publications

Occurrence of fluoride in ground waters of Saudi Arabia

Occurrence of fluoride in ground waters of Saudi Arabia

Fluoreto nas águas subterrâneas dos aqüíferos Tubarão e Cristalino, região de Salto-Indaiatuba (SP)

Factors controlling groundwater chemistry in an agricultural area with complex topographic and land use patterns in mid‐western South Korea

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