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The photocatalytic reduction of hexavalent chromium over titania suspensions was investigated using a 9W UV-A lamp as the irradiation source. Experiments were carried out at acidic conditions, with varying chromium and photocatalyst concentration. Commercially available titania powders were tested, predominantly Evonik P-25 (70:30 anatase:rutile), as well as Kronos vlp7000 and Millenium PC-100 (100%...
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