Assessment of Sediment Dredging Effectiveness by Considering Overlying Water and Pore Water Heavy Metals in Lake Mogan, Turkey

Dredging, a practice intended to increase the recreational value of aquatic systems at risk eutrophication, has been implemented in Lake Mogan. This study aimed determine a) Heavy metal concentrations (Hg, As, Cd, Cr, Pb, Ni, Cu, and Zn) overlying water sediment pore water, b) Pore toxicity levels some these metals (Cu, following dredging Surface samples were taken from two stations lake between May November 2020 obtain values. The first station was chosen specifically because it receives wastewater mineral processing facilities nearby households; second station. After all, household industrial waste agricultural wastewater. findings indicate that Zn had highest during period, Pb lowest. Overlying found be within acceptable limits outlined by “Water Quality Control Regulations”. for (330.50±8.72 µg L-1) Cu (12.85±4.35 higher than recommended WQC limits. Since no values greater 1 IWCTU (Interstitial Water Criterion Toxic Units) NI (Nemeraw index) Zn, serious pollution present four metals; however, greatest potential toxicity. Moreover, total both degree thereof increased May. fact heavy Mogan generally those indicates strong adsorption suggests that, least terms reducing surface metals, activities are not very effective.