“…Study area is industrial area for basic and downstream industries, Jazan Industrial and Economic City (JIEC) (17° 17′ 40″ N, 42° 23′ 40″ E), province of Jazan, Saudi Arabia ( Fig. 1 represent the whole map of KSA with Jizan highlighted in the southwestern; a, map of Jazan city; b, the Jazan economic city; c, and the refinery industry in Jazan; d) [ 8 ]. A collective of 30 samples of oil refinery wastewater were collected from the drainage regions of petroleum refinery industry in sterilized polyethylene bottles and transported to the laboratory in ice tank.…”