Assessment and heavy metal behaviors of industrial waste water: A case study of Riyadh city, Saudi Arabia (original) (raw)

This study focuses on the temporal monitoring and chemical analysis of two pathways, unpadded and open drain canal, of the surface industrials effluent on industrial city of Riyadh city, Saudi Arabia. The distribution of the chemical constituents (Major, Minor, and Heavy metals) is determined and compared with Saudi Arabia and USEPA standards. The obtained results indicated that most collected water samples exceeded the acceptable limits set by standards used for most parameters determined. The concentrations of total suspended solids, Fe, Mn, Zn, Cd, Ni, Pb, Mo, As, B, NO 3 -, and NH 4 + in industrial effluents decreases away from the point source of pollutions. On the other hand, the SAR , RSC, total hardness, and soluble ions (Ca 2+ , Mg 2+ , Na + , K + , Cl -, CO 3 2-, HCO 3 -, and SO 4 2-), remained constant. Most heavy metals on wastewater effulent were above permissible limits. On the other hand, the filtration of wastewater decreases the heavy metal concentrations to permiss...