“…Elemental concentrations in ZGR, were measured by ED-XRF (energy dispersive-X-ray diffraction) technique for 22 elements in PM 2.5 ( IAEA, 2013 , EPA, 1999 ). In BDP, elemental concentrations were measured by PIXE for 16 elements ( Furu et al, 2015 ), and by ED-XRF for 5 trace elements (Co, Cr, Rb, Se, Sr) ( Osán et al, 2001 , Samek et al, 2017 ) in PM 2.5 samples. For SOF, the analysis of elements was performed using ED-XRF ( Veleva et al, 2014 ) for the quantification of 25 elements in PM 10 samples.…”