id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-6513	Uusitalo, Risto; Ekholm, Petri; Lehtoranta, Jouni; Klimeski, Aleksandar; Konstari, Olli; Lehtonen, Riku; Turtola, Eila	Ca–Fe oxide granules as potential phosphate barrier material for critical source areas: a laboratory study of P retention and release	2012	13	.pdf	application/pdf	9795	368	56	Results Phosphate retention Effect of contact time on P retention by the granules in batch tests The granules showed a high P retention efficiency and rapid P retention in P solution concentrations of 1 and 10 mg l-1 (Fig. 1). It thus seems that Fe oxide–rich materials may in laboratory tests yield P:Fe ratios well above the molar ratio of 0.1 (up to about 0.3 for biogenic Fe hydroxide studied by Rentz et al. 2009) when fed with P solutions, but a P:Fe value of 0.1 would probably be close to the maximum P saturation that Fe hydroxide–rich materials can realistically achieve in field barriers where the material contacts water occasionally low in soluble P.	cache/afs-6513.pdf	txt/afs-6513.txt