Ti-salt flocculation for dissolved organic matter removal in seawater

Publication Type:
Journal Article
Citation:
Desalination and Water Treatment, 2013, 51 (16-18), pp. 3591 - 3596
Issue Date:
2013-01-01
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In this study, the removal of different fractions of organic matter in seawater was investigated using titanium tetrachloride (TiCl4) flocculation and compared with ferric chloride (FeCl3) flocculation. The organic matter fractions were characterised using liquid chromatography-organic carbon detector (LC-OCD). Results showed the hydrophobic compounds removal was dominant by both flocculants. However, the removal of hydrophilic organic compounds, such as humics and low-molecular weight neutral compounds of seawater, was superior by TiCl4flocculation compared to FeCl3flocculation and this removal increased considerably with the increase of TiCl4doses. The flocculated sludge after TiCl4flocculation was incinerated to produce titanium dioxide (TiO2) nanoparticle. TiO2from seawater sludge characterised by X-ray diffraction (XRD) and scanning electron microscope/energy-dispersive X-ray spectroscopy (SEM/EDS) showed predominant anatase phase with Si as a main dopant. © 2013 Copyright Balaban Desalination Publications.
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