Inorganic and organic smectite for synthetic and real textile water treatment. Optical and luminescence properties

Surfactant modified smectite was prepared using hexadecyltrimethylammonium bromide at three cation exchange capacity (CEC) levels. Obtained organosmectites labeled H-i-Sm (I = 1, 2 and 3 CEC) were characterized by several methods. Results show that the point of zero charge (PZC) of organo-modified smectite was displaced to the basic zone compared to that of Na-smectite. Hybrid material develops more positives surface charges, a heterogeneous structure with a great basal spacing layer. H-3-Sm and purified smectite (Arp) were then tested as adsorbents for the removal of an anionic diazo dye. Amount of dye removal by H-3-Sm (100%) was found to be around similar to 3 times higher than that of Arp. Complexe organosmectite after Congo Red (CR) dye adsorption can be used in photocatalytic field. The treated textile effluent by Arp, collected from textile Tunisian industry, can be re-used for vegetation irrigation, adapted to high salinity