Authors: Mehmet Emin Aydin Senar Aydin Fatma Beduk Ali Tor Arzu Tekinay Marit Kolb Müfit Bahadir
Publish Date: 2015/08/08
Volume: 22, Issue: 23, Pages: 19203-19212
Abstract
Irrigating crops with untreated wastewater leads to elevated concentrations of heavy metals both in soil and cultivated crops The current study was designed to determine heavy metal ie Pb Cd Cr Cu Ni Zn Hg accumulation in Konya soils in selected nine sites irrigated with wastewater for over 40 years Nonirrigated soil samples and soil samples irrigated with well water were taken as control samples Transport of these pollutants to the wheat samples cultivated in the investigated site was also examined The obtained results reveal that high alkaline properties and clay structure of Konya soil reduce the mobility of contaminants and cause accumulation in the top layer of soil Intense effect of wastewater irrigation on soil EC was determined The highest concentrations of Pb Cr Cu Cd Zn Ni and Hg in wastewater irrigated soil were 532 371 315 114 915 134 and 034 mg kg−1 respectively Wastewater irrigated soils were strongly polluted by means of Cd 823–116 mg kg−1 and moderately to strongly polluted by means of Ni 477–134 mg kg−1 exceeding Maximum Admissible Concentrations for Trace Elements in Agricultural Soils and Sewage Sludge Regulation limit values of Turkey Maximum concentrations found for Pb Cr Cu Cd Zn and Ni in wastewater irrigated wheat grain were 844 130 910 nd 2931 and 094 mg kg−1 respectively Besides Hg was not detected in any samples of wheat grain Based on the regulation of Turkish Food Codex Pb contamination in wheat samples grown in the sampling site was evidenced
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