Abstract
Titanium dioxide (TiO2) has a greater removal capacity of arsenic (As) from water, however, its practical application in water treatment is limited due to its high cost and handling difficulty. Thus, development of rutile ore (RO) (a natural ore containing titanium dioxide) as an adsorbent for As removal from water is of great significance in reducing treatment cost of As polluted water. Batch experiments were carried out to evaluate the As removal capacity of FeCl3 modified RO (FMRO) and the preliminary mechanisms characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD) microanalysis, Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). The results showed that ferric modification of RO increased As adsorption from water by 10 times over RO, and both minerals absorbed more As(V) than As(III). The As(V) and As(III) adsorption behavior of FMRO and RO could be best described by Freundlich equation. The effect of solution pH on As removal obvio...
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