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Octahedral TiO2 nanocrystals (OTNs) have been prepared by a hydrothermal method with the main surface of (101). Then the arsenic adsorption behavior on OTNs is investigated in a broad experimental pH range from 1.0 to 13.5. The maximum adsorptions of arsenite (As(III)) and arsenate (As(V)) appear at pH values 8 and 4, respectively. It is interesting to see that the minimum adsorptions of As(III) and...
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