Dust fallout in Kuwait city: Deposition and characterization

摘要: Dust fallouts in Kuwait city was monitored on monthly basis during the period from March 2011 to February 2012 at 10 locations. The results of this study reveal that: (1) dust deposition rates ranged 0.002 0.32 kg/m(2) with average rate 0.053 and annual 0.59 kg/m(2), ranking first out 56 observed throughout world; (2) average, about 55.9% settled have fine very sand fraction sizes, while silt clay comprise an 37.4 1.4% total sample, respectively; (3) concentrations for Zn Mo 15 other elements analyzed were up 11 times higher than their soil background values Kuwait, Pb Ni seven higher; (4) Mo, Ni, show maximum enrichment relative upper continental crustal component (Mn); (5) Sr, Zr highest concretions among all collected samples; (6) quartz calcite dominant minerals samples. distribution heavy metals seems be controlled mainly by land uses volume traffic emissions.