Record nummer 2079020
Titel artikel Biological and physico-chemical formation of Birnessite during the ripening of manganese removal filters
Auteur(s) Bruins, J.H. ; Petrusevski, B. ; Slokar, Y.M. ; Huysman, K. ; Joris, K. ; Kruithof, J.C. ; Kennedy, M.D.
Tijdschrifttitel Water research : the journal of the International Association on Water Quality
Deel(Jaar)Nummer 69(2015)1 February
Paginering 154 - 161
Online full text
Trefwoorden (cab) grondwaterkwaliteit / waterzuivering / filtratie / zandfiltratie / mangaan / birnessiet / mangaanoxiden / beluchting / spectroscopie / paramagnetische elektronenresonantiespectroscopie / cryo scanning elektronenmicroscopie / initiatie
Rubrieken Grondwaterhydrologie
Publicatie type Artikel
Taal Engels
Toelichting (Engels) The efficiency of manganese removal in conventional groundwater treatment consisting of aeration followed by rapid sand filtration, strongly depends on the ability of filter media to promote auto-catalytic adsorption of dissolved manganese and its subsequent oxidation. Earlier studies have shown that the compound responsible for the auto-catalytic activity in ripened filters is a manganese oxide called Birnessite. The aim of this study was to determine if the ripening of manganese removal filters and the formation of Birnessite on virgin sand is initiated biologically or physico-chemically. The ripening of virgin filter media in a pilot filter column fed by pre-treated manganese containing groundwater was studied for approximately 600 days. Samples of filter media were taken at regular time intervals, and the manganese oxides formed in the coating were analysed by Raman spectroscopy, Electron Paramagnetic Resonance (EPR) and Scanning Electron Microscopy (SEM). From the EPR analyses, it was established that the formation of Birnessite was most likely initiated via biological activity.
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