Use of the electrodialysis process for fluoride ion and salt removal from multi-constituent aqueous solutions

• Autorzy: Grzegorzek M. , Majewska-Nowak K.
• Języki publikacji: EN

Abstrakty

EN

Fluorine is a common chemical element. According to WHO guidelines, the F- ion content in drinking water cannot be higher than 1.5 mg/dm3. Excess of fluorine leads to many health problems: Alzheimer’s disease, neurological disorders or fluorosis (dental or skeletal). Fluoride can be removed from aqueous solutions by means of various methods (adsorption, precipitation, ion-exchange or membrane techniques). The aim of this paper was to evaluate the efficiency of electrodialysis in fluoride removal under the presence of organic substances. During experiments solutions containing fluorides (5, 10, 100 and 200 mg F-/dm3), mineral salt (0.5 g NaCl/dm3) and organic matter (5, 10 and 15 mg/dm3 of humic acids) were used. The research was conducted with the use of the PC Cell BED-1 System. The current density was equal to 1.72 mA/cm2. It has been shown that electrodialysis is an efficient technique of fluoride removal provided that the initial concentration of F- ions is not higher than 10 mg F-/dm3. The impact of organic matter on the process run and efficiency was dependent on the fluoride content in the treated solution.

PL

Fluor jest powszechnie występującym pierwiastkiem chemicznym. Zgodnie z wytycznymi WHO zawartość fluorków w wodzie do picia nie może być większa niż 1.5 mg/dm3. Nadmiar fluoru prowadzi do licznych problemów zdrowotnych (Alzheimer, problemy neurologiczne, fluoroza zębów lub szkieletu). Fluorki mogą być usunięte z roztworów wodnych z wykorzystaniem różnych metod (adsorpcja, strącanie, wymiana jonowa czy procesy membranowe). Celem pracy była ocena efektywności elektrodializy w usuwaniu jonów fluorkowych w obecności substancji organicznych. W trakcie doświadczeń zostały wykorzystane roztwory zawierające fluorki (5, 10, 100 i 200 mg F-/dm3), sól mineralną (0.5 g NaCl/dm3) oraz substancje organiczne (5, 10 i 15 mg/dm3 kwasów humusowych). Doświadczenia zostały przeprowadzone z wykorzystaniem instalacji PCCell BED-1 System. Gęstość prądu wynosiła 1.72 mA/cm2. Wykazano, że w procesie elektrodializy fluorki są skutecznie usuwane pod warunkiem, że ich początkowe stężenie nie przekracza 10 mg F-/dm3. Wpływ substancji organicznych na przebieg i efektywność procesu zależał od stężenia fluorków w oczyszczanym roztworze.

Słowa kluczowe

EN

water treatment; electrodialysis; fluoride

PL

oczyszczanie wody; elektrodializa; fluorek

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2016
• Tom: Vol. 9, no. 4
• Strony: 107--113
• Opis fizyczny: Bibliogr. 13 poz.

Twórcy

autor

Grzegorzek M.

• Wrocław University of Science and Technology, Faculty of Environmental Engineering, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

autor

Majewska-Nowak K.

• Wrocław University of Science and Technology, Faculty of Environmental Engineering, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).