The study of petrochemical industries sewage effects on the water quality in Khor Musa

Imam Khomeini petrochemical complex is situated at the northwest part of the Persian Gulf where discharged its sewage to the seawater. Samples were collected using Van Dorn sampler, bimonthly from four sites during December 2009 to May 2010. The seawater physicochemical parameters such as DO, pH, BOD, total ammonia, total phosphorous and turbidity were measured and among them, BOD (5.05ppm), total ammonia (2.51ppm) and total phosphorous (0.3ppm) showed higher than standard values. Based on water quality scoring (WQS), all sites showed 2.66 values which classified as bad water quality. During this study, BOD, total ammonia and phosphorous showed significantly (p<0.05) differences during sampling periods