Water demand in the Sultanate of Oman has recently increased (15% per year) as a result of financial development, increasing in population, agriculture and industries, which lead to depletion of water resources. It is clear that the current water resources cannot meet the future demand. In addition, most areas of the country are still suffering from the presence of large quantities of untreated wastewater that leads to leaks in the subsoil and cause roundwater contamination. Organic pollutants, anionic toxic species and heavy metals are the main industrial wastewater ollutants from oil industry and hospital wastewater. Above the tolerance level, heavy metals cause neurological disorders, infertility, brain fogginess, attention deficit, problems with concentration, developmental delay in children and obsessive compulsive disorder diseases for humans.