Szukana fraza: [Abstract = "One of the problems with iron removal from groundwater is organic matter. The water samples examined differed in terms of the value of the ratio of the TOC concentration and the concentration of total iron \(D\). It was concluded that with increase in the coexistence ratio of organic substances and total iron in water, efficiency of Fe\(II\) to Fe\(III\) oxidization with dissolved oxygen decreased, while the oxidation time was increasing."]

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