Desalination of Seawater Using Nano Clays and MgAl- CO3 Layered Double Hydroxides

Nowadays, increasing population and reducing fresh water resources, needs to introduce seawater as a new water source and sweetening it using new techniques including nanoparticles considered. Mineral clays, such as cationic exchangeable bentonite clays, can exchange their own cations, including calcium and magnesium, with sodium ions of sea water. In this research, Kalkate's bentonite clay was used for seawater sweetening testing and the flame photometer device was used to measure the process of reducing sodium ion from seawater. The results showed using 5.5 gr bentonite with 200 rpm mixing velocity, in a contact time of 15 minute in 20 ml sea water is the optimal conditions for mixing bentonite and seawater. On the other hand, in order to reduce the chloride ions from seawater, MgAl-CO3 layered double hydroxides nanoparticles, was synthesized and used in water quality laboratory of the University of Zanjan. The results of  this experiments also showed using of 1.25 gr LDH with 200 rpm mixing velocity, in a contact time of 10 minute in 5 ml seawater is the optimal mixing conditions.