ANALYSIS OF SEASONAL VARIATION ON DEGREE OF CONTAMINATION WITH HEAVY METALS IN AARJATE VILLAGE, MOROCCO.
AN INDEX APPROACH
FRANÇOIS X. NSHIMIYIMANA 1, 2, MARIA-EMA FACIU 2*, ABDELLAH EL ABIDI 3, SOUAD EL BLIDI 4, MOHAMED FEKHAOUI 4, IRINA LOREDANA IFRIM 5, ABDELMAJID SOULAYMANI 1, GABRIEL LAZAR 2 1. University Ibn Tofail, Faculty of Sciences, Genetics and Biometry Laboratory, BO. 133 Campus Universitaire, Kénitra 14000, Morocco
2. “Vasile Alecsandri” University of Bacau, Department of Mechanical and Environmental Engineering, 157 Calea Marasesti, 600115 Bacau, Romania
3. National Institute of Hygiene, Hydrology and Toxicology Laboratory, 27 Avenue Ibn Battouta, BO 769, Rabat 10000, Morocco
4. Scientific Institute of Rabat Agdal, Ecotoxicology Laboratory, Avenue Ibn Batouta, 1014, Rabat 10000, Morocco
5. “Vasile Alecsandri” University of Bacau, Department of Chemical and Food Engineering, 157 Calea Marasesti, 600115 Bacau, Romania
*Corresponding author: ema.faciu@ub.ro
Water samples from wells and samples from soil nearby them were taken during dry (June-September 2013) and wet (December 2013, January - February 2014) seasons and concentrations of Cd, Cu, Mn, Ni, Pb and Zn were determined. Contamination Factor for each heavy metal and Nemerow pollution index were calculated showing a decrease in contamination degree from summer to winter for soil and an increase in case of groundwater. Vertical transfer of pollutants from top soil to groundwater was assessed using Hierarchical Cluster Analysis, significant correlations between concentrations and composition of soil being found. In case of Ni, the variables corresponding to the concentrations from soil and groundwater were part of the same cluster, in both seasons, the distribution maps of concentrations confirming the pattern of transfer.
