Conclusion

The results from the tests and methods showed a positive relationship between concentrations of metals and of clay / organic matters. This concludes that these parameters controls the sedimentation and accumulation of metals in this environment. EF showed moderate severe enrichment of Cd and minor with regards to Cr and Mn. Geoaccumulation index for Cd results showed moderate pollution in station 3 and strong pollution in stations 1, 2, 4 and 5  The sources for Cd was believed to come from agricultural use of pesticides and fertilizers. Cr is believed to come from Chrome ores in the river basin. Regarding SQG’s the levels for Cd and Cr were above TEC’s and believed harmful effects for benthic organisms (Çevik et al. 2009)