“…Shatt Al-Arab river is subject to hydrocarbons pollution by sewage, industrial wastes and the activities of refining in addition to natural seeps and other human activities (Farid et al, 2016). The concentrations of n-alkanes measured here are relatively within the range of many other worldwide oil contaminated sediments such as those reported by Bouloubassi et al (2001), Yunker et al (2003), Lee et al (2005), Mille et al (2007), Zaghden et al (2007), Harji et al (2008), Da Silva and Bicego (2010), Wang et al (2011), Wagener et al (2012, Punyu et al (2013), Zrafi et al (2013) and Frena et al (2017). The comparison also reveal higher sedimentary concentrations of n-alkanes in Shatt Al-Arab River compared to those detected by Readman et al (2002), Medeiros and Bicego (2004), Medeiros et al (2005), Tolosa et al (2005), Wang et al (2006), Gao et al (2007) and Harji et al (2008).…”