Groundwater quality in some Voltaian and Birimian aquifers in northern Ghana—application of mulitvariate statistical methods and geographic information systems

Tracking nitrate sources in groundwater and associated health risk for rural communities in the White Volta River basin of Ghana using isotopic approach (δ15N, δ18O NO3 and 3H)

“…In Ghana, various authors have studied groundwater quality and geochemistry in almost all the river basins (Gibrilla et al, 2011;Kortatsi et al, 2009), Ahialey et al, 2010, Tay andKortatsi, 2008;Yidana et al, 2012;Loh et al, 2012). Focused study on nitrate in groundwater in the Upper East Region dates back to late the 1950s.…”

Fluoride contamination of groundwater resources in Ghana: Country-wide hazard modeling and estimated population at risk

“…Despite numerous local studies on fluoride contamination of groundwater in Ghana (Affam et al, 2012;Alfredo et al, 2014;Anim-Gyampo et al, 2012;Anku et al, 2009;Apambire, 1996;Atipoka, 2009;Craig et al, 2018;Firempong et al, 2013;Ganyaglo et al, 2019;Loh et al, 2012;Smedley et al, 2002;Yidana et al, 2012;Zango et al, 2019), no comprehensive assessment of fluoride hazard and risk yet exists for the whole country, including estimates of the number of children and adults potentially exposed to unsafe levels. Therefore, in the present study, we spatially model the probability of the occurrence of geogenic fluoride concentrations greater than 1.0 mg/L in groundwater in Ghana.…”

Flúor na Água do Aquífero Bambuí no Oeste da Bahia (Brasil)

“…As componentes PC1 e PC2 sugerem haver um paralelismo entre as variáveis pH, Na + e F -, indicando que o flúor, principalmente como íons fluoreto, correlaciona-se negativamente com as variáveis Ca 2+ , Mg 2+ e DT (de carbonatos). A solubilidade e precipitação da fluorita são controladas pelos teores do cálcio nas águas naturais (Equação 3), que segundo Yidana et al (2012), a constante de equilíbrio (K) da fase mineral fluorita, a temperatura de 25 ºC, K S , de 10 -10,6 . CaF 2 ↔ Ca 2 + + 2F -(Eq.…”