The distribution pattern of heavy metals in the sediments of Horul Azim lagoon located in the west of Khuzestan

Authors

1 masters of environmental geology from shahid chamran univresity of ahvaz

2 Member of the Faculty of Geology Department of Shahid Chamran University of Ahvaz

3 masters of hydrogeology from shahid chamran univresity of ahvaz

10.22055/aag.2024.45643.2424

Abstract

With the aim of investigating deep and surface changes of heavy metals including; Arsenic, Lead, Zinc, Nickel, Vanadium and Chromium due to the activity of oil projects and determining their pollution level in Hurolazim wetland in Khuzestan province, 16 samples from 8 stations (two samples for each station) in an approximate radius of 5-10 meters around the oil rigs and with a depth of approximately 30-40 cm were collected in a completely flooded environment. Based on the average pollution factor index (CF), Arsenic has low pollution and Lead, Zinc, Nickel, Vanadium and Chromium have moderate pollution. Based on the pollution load index (PLI), stations st1, st5 and st6 have low concentration of metals or no pollution, and stations st2, st3, st4, st7 and st8 are polluted. Stations st1, st2, st5, st6, st7 and st8 based on modified pollution degree index (mCd), are without pollution to slightly polluted, and stations st3 and st4 have low pollution. In this research, SPSS23 software was used for statistical analysis of the data, which shows a positive and high correlation between Nickel, Vanadium, Lead and Zinc metals. A high correlation between metals may indicate a similar contamination level and source for these metals. Also, based on the cluster analysis performed for the studied stations, it was observed that the stations st3, st4 and st7 were placed one cluster and the stations st1, st2, st5, st6 and st8 were placed in another cluster

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