The Role of Physico-Chemical and Biological Processes in Manganese and Ammonia Nitrogen Removal from Groundwater

First and second stage sand filter treatment of raw groundwater containing up to 1.4 mg/dm super(3) of manganese and up to 2.9 mg/dm super(3) of ammonia nitrogen after aeration efficiently reduced the concentrations of Mn (II) and NH sub(4) ions to levels permissible for drinking water. To identify...

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Bibliographic Details
Published in:Polish journal of environmental studies 2000-01, Vol.9 (2), p.91-91
Main Authors: Olanczuk-Neyman, K, Bray, R
Format: Article
Language:English
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Summary:First and second stage sand filter treatment of raw groundwater containing up to 1.4 mg/dm super(3) of manganese and up to 2.9 mg/dm super(3) of ammonia nitrogen after aeration efficiently reduced the concentrations of Mn (II) and NH sub(4) ions to levels permissible for drinking water. To identify the processes underlying these reductions, ion removal efficiencies were compared before and after suppressing microbial activity with sodium azide or high temperature. Results showed that NH sub(4) removal involved physico-chemical (ion exchange and sorption) and biological (nitrification) processes. Mn (II) removal occurred mainly through chemical and biological autocatalytic oxidation of previously formed manganese oxides.
ISSN:1230-1485