Experimental study of pollutants concentrations variability in Tunisia Tarek Bouebdelli, Karim Bouchlaghem, Ridha Chouikh and Amenallah Guizani Eur. Phys. J. Plus, 131 11 (2016) 397 Published online: 11 November 2016 DOI: 10.1140/epjp/i2016-16397-6