Study of Manganese Removal in the Process of Mine Water Remediation

• Autorzy: Macingova E. , Ubaldini S. , Luptakova A.

Warianty tytułu

PL

Badanie usuwania manganu w procesie rekultywacji wód kopalnianych

• Języki publikacji: EN

Abstrakty

EN

In this work a comparative study of manganese removal from pre-treated acid mine drainage is described. Manganese removal by three ways was realized. At the first method sodium hydroxide was added to raise pH of processed AMD to the 9.5 to promote the abiotic oxidation of soluble divalent species to insoluble form of manganese. Potassium permanganate was used at pH near neutrality for elimination of manganese from AMD by oxidative precipitation in the second process. A third method, as electrowinning, was applied, finalized to the anodic Mn recovery under MnO2 form. The results showed that the three methods are effective and manganese were removed from acid mine drainage for values that comply with environmental requirements. However, when sodium hydroxide was used as reagent, coprecipitation of manganese and magnesium present in AMD was observed. In the second experiment enhanced selectivity of the process and purity of obtained precipitates were achieved. In the process of electrowinning – over 95% of Mn removal under MnO2 form, with a high degree of purity (about 99%) was attained.

PL

W pracy tej opisano porównawcze badanie usuwania manganu z przygotowanego drenażu kwaśnych wód kopalnianych. Usuwanie manganu odbyło się na trzy sposoby. Po pierwsze, dodano wodorotlenek sodu aby podnieść pH przerabianego AMD do 9.5 aby spowodować abiotyczne utlenianie rozpuszczalnych dwuwartościowych gatunków do nierozpuszczalnej formy manganu. Nadmanganian potasu zastosowano przy pH bliskim poziomu neutralnego aby wyeliminować mangan z kwaśnych wód kopalnianych poprzez tlenowe strącanie w drugiej metodzie. Trzecia metoda, jako elektrolityczna, została zastosowana do anodowego odzysku Mn w formie MnO2. Wyniki wskazały, że trzy metody są efektywne i mangan został usunięty z drenażu kwaśnych wód kopalnianych w ilościach porównywalnych z wymaganiami środowiskowymi. Jednakże, przy zastosowaniu wodorotlenku sodu zaobserwowano wzajemne strącanie manganu i magnezu obecnego w kwaśnych wodach kopalnianych. W drugim eksperymencie zwiększona została selektywność procesu i czystość otrzymanych substancji. W procesie elektrolitycznym – ponad 95% Mn zostało usuniętych w postaci MnO2, przy dużym stopniu czystości (około 99%).

Słowa kluczowe

EN

acid mine drainage; manganese removal; oxidative precipitation; electrowinning

PL

drenaż kwaśnych wód kopalnianych; usuwanie manganu; strącanie tlenowe; elektroliza

• Wydawca: Polskie Towarzystwo Przeróbki Kopalin
• Czasopismo: Inżynieria Mineralna
• Rocznik: 2016
• Tom: R. 17, nr 1
• Strony: 121--127
• Opis fizyczny: Bibliogr. 22 poz., tab., wykr.

Twórcy

autor

Macingova E.

• Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01 Košice, Slovak Republic

autor

Ubaldini S.

• Institute of Environmental Geology and Geoengineering, CNR, Area della Ricerca di Roma RM 1 – Montelibretti, Via Salaria Km 29,300, 00015, Monterotondo Stazione, Roma, Italy

autor

Luptakova A.

• Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01 Košice, Slovak Republic

Bibliografia

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Uwagi

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