Ti-salt flocculation for dissolved organic matter removal in seawater

Sanghyun Jeong, Yosef Okour, Tien Vinh Nguyen, Ho Kyong Shon, Saravanamuthu Vigneswaran
2013 Desalination and Water Treatment  
In this study, the removal of different fractions of organic matter in seawater was investigated using titanium tetrachloride (TiCl 4 ) flocculation and compared with ferric chloride (FeCl 3 ) flocculation. The organic matter fractions were characterised using liquid chromatographyorganic 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
more » ... ecular weight neutral compounds of seawater, was superior by TiCl 4 flocculation compared to FeCl 3 flocculation and this removal increased considerably with the increase of TiCl 4 doses. The flocculated sludge after TiCl 4 flocculation was incinerated to produce titanium dioxide (TiO 2 ) nanoparticle. TiO 2 from 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.
doi:10.1080/19443994.2012.750811 fatcat:p6wjs3hcwjarlhqo7pb64yxfse