Fluoride concentrations in the arid Namaqualand and the Waterberg groundwater, South Africa: Understanding the controls of mobilization through hydrogeochemical and environmental isotopic approaches

Abiye, Tamiru; Bybee, G. M.; Leshomo, Joyce

doi:10.1016/j.gsd.2017.12.004

Cited by 45 publications

(20 citation statements)

References 26 publications

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“…Microorganisms have to be included among the design pollutants in drinking water treatment [51] and an adequate disinfection step should be selected to guarantee the removal of the different species occurring in the water source and also to guarantee the safe quality at the user point.…”

Section: Group South Africa Mozambiquementioning

confidence: 99%

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Surface Water and Groundwater Quality in South Africa and Mozambique—Analysis of the Most Critical Pollutants for Drinking Purposes and Challenges in Water Treatment Selection

Verlicchi

Grillini

2020

Water

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According to a recent report by the World Health Organization (WHO), the countries which still have limited access to water for drinking purposes are mainly those in the Sub-Saharan region. In this context, the current study provides an overview of the quality of surface water and groundwater in rural and peri-urban areas of the Republic of South Africa (RSA) and Mozambique (MZ) in terms of concentrations of conventional pollutants, inorganic chemicals, microorganisms, and micropollutants. Their values were compared with the drinking water standards available for the two countries. Regarding surface water, it was found that microorganisms occur at high concentrations; nickel (RSA) and boron (MZ) are other critical parameters. Regarding groundwater, arsenic and lead (RSA) and boron, sodium, and chloride (MZ) are the main critical substances. With regard to micropollutants, their surface water concentrations are much higher than those in European rivers. The highest values were for ibuprofen, acetylsalicylic acid, clozapine, and estriol. Suitable treatment is necessary to produce safe water depending on the main critical pollutants but, at the same time, action should be taken to improve wastewater treatment in rural areas to improve and safeguard surface water bodies and groundwater which are sources for drinking needs.

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Section: Group South Africa Mozambiquementioning

confidence: 99%

“…In the X axis, the underlined names refer to indicator bacteria, those not underlined refer to pathogen bacteria. Data from:[2,3,28,37,44,51,56].…”

mentioning

confidence: 99%

Surface Water and Groundwater Quality in South Africa and Mozambique—Analysis of the Most Critical Pollutants for Drinking Purposes and Challenges in Water Treatment Selection

Verlicchi

Grillini

2020

Water

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“…The high content of As in groundwater was correlated to natural origins (release from minerals and host rocks), but also to the discharge of industrial activities (As used in glass manufacturing, steel melting process and as a wood preservative) and to agricultural activities (due to the use of pesticides as remarked above) [35].…”

Section: Discussionmentioning

confidence: 92%

“…Observed concentrations (circles) inorganic chemical (A) and macropollutants (B) in groundwater in the reviewed studies referring to South Africa and the corresponding limits (red dashes) set by SANS-241 (red line) for drinking water. Data from:[32][33][34][35][36][37][38][39].…”

mentioning

confidence: 99%

Surface and Groundwater Quality in South African Area—Analysis of the Most Critical Pollutants for Drinking Purposes

Verlicchi

Grillini

2019

The 4th International Electronic Conference on Water Sciences

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According to a recent report by WHO, the countries which still have a limited access to water for drinking purposes are mainly those in the Sub-Saharan region. (Potential) water sources for drinking needs may contain different contaminants. In this context, the current study consists in an overview of the quality of surface water and groundwater in the Republic of South Africa (RSA) and Mozambique (MZ) and provides the variability ranges of the concentrations of the main pollutants in the two countries. Chemical and physical characteristics, concentrations of macropollutants, inorganic compounds (metals) and selected microorganisms were collected for surface water and groundwater and compared with the standards for drinking water set in the two countries. It was found that in surface water, microorganisms were always at very high concentrations. In addition, nickel (in RSA) and boron and chlorine (in MZ) were the most critical compounds. It emerged that in groundwater, arsenic, lead and chlorine (in RSA) and boron, sodium and chlorine (in MZ) were the main critical pollutants. Adequate treatments in the construction of new drinking water plants in rural areas should be selected on the basis of these most critical compounds and their observed variability over time.

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“…High fluoride concentration can also be related to long residence time of groundwater due to enhanced water-rock interaction process [10], when the tritium content indicating substantially long circulation time within the aquifers. Because we do not have 3 H measurements for Ul'sky and Annensky areas it is difficult to say if this is a long circulation or modern water.…”

Section: Hydrogeochemistrymentioning

confidence: 99%

Hydrochemistry of thermal waters in crystalline rocks of the Sikhote-Alin ridge, Far East of Russia

2019

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Low-enthalpy thermal waters (30-50°C) of HCO3-Na and HCO3-SO4-Na types with nitrogen as a dominant associated gas discharge on the southern continental margin of the Russian Far East and traditionally are of great importance for recreation and balneology facilities. All studied thermal waters have meteoric origin and relate to Palaeocene granite intrusions. Based on the chemical characteristics and isotopic composition, thermal waters are divided onto “immature” thermal waters with a short residence time (3H=1.3±0.2TU), and “mature” thermal waters (3H=0.3±0.2TU) originated as a result of a longer evolution history (more than 60 years). The chemical composition of waters is largely determined by water-rock interactions, residence time and the local geothermal gradient.

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Fluoride concentrations in the arid Namaqualand and the Waterberg groundwater, South Africa: Understanding the controls of mobilization through hydrogeochemical and environmental isotopic approaches

Cited by 45 publications

References 26 publications

Surface Water and Groundwater Quality in South Africa and Mozambique—Analysis of the Most Critical Pollutants for Drinking Purposes and Challenges in Water Treatment Selection

Surface Water and Groundwater Quality in South Africa and Mozambique—Analysis of the Most Critical Pollutants for Drinking Purposes and Challenges in Water Treatment Selection

Surface and Groundwater Quality in South African Area—Analysis of the Most Critical Pollutants for Drinking Purposes

Hydrochemistry of thermal waters in crystalline rocks of the Sikhote-Alin ridge, Far East of Russia

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