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Experimental study models arsenic removal in ferrihydrite, indicating effective treatment strategies.
according to the As/Fe ratio. This model also reproduces the arsenic removal behavior observed at sites where As removal by Fh generation is being attempted. Because this model is based on equilibrium reactions, to manage field treatment using model predictions, it is desirable to avoid conditions where Fh redissolution and reprecipitation occur, and to design a hydraulic residence time (HRT) of 10 h or more.
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Iwai et al. (2026) studied this question.
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