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Evaluation of Statistical Distribution Characteristics of the Metallic Compositions of PM2.5 and PM10 Particles in Büyükçekmece Watershed Atmosphere

2008; Foundation for Environmental Protection and Research; Volume: 17; Issue: 68 Linguagem: Inglês

10.5053/ekoloji.2008.685

1300-1361

Ferhat Karaca,

Water Quality and Pollution Assessment

In this study, the concentrations of the elements Cu, Cd, Ni, Pb and Zn measured in PM 2 5 and PM 10 particles collected in Buyukcekmece lake basin during one year period are evaluated and their yearly mean values for both of the groups are found as; 0.96 ng m -3 , 18.7 ng m -3 , 28.9 ng m -3 , 54.8 ng m -3 , 21.9 ng m - 3 and 1.29 ng m -3 , 45.1 ng m -3 , 62.0 ng m -3 , 112 ng m -3 , 33.0 ng m -3 , respectively. Statistical distribution characteristics of the elements are investigated and lower limits of episode values and upper limits of background concentration levels are calculated. Ten different frequency distribution models are tested for each element, best frequency distribution models of each metal are defined by the results of Chi-square test for Cd, Cu, Ni, Pb, Zn in PM 2.5 and PM 10 as; Weibull, PearsonS, Lognormal, LogLogistic, Weibull and Pareto2, LogLogistic, LogLogistic, InvGauss, Pareto2, respectively. By the help of these obtained models; the numbers of examples in the datasets are increased to 1 year complete data. Finally, recommended limit values of each dataset are calculated based on 98th percentiles. These values for Cd, Cu, Ni, Pb, Zn in PM 2 5 and PM 10 are found as 10.3 ng m -3 , 213 ng m -3 , 1625 ng m -3 , 494 ng m -3 , 592 ng m -3 and 13.1 ng m -3 , 270 ng m -3 , 2158 ng m -3 , 390 ng m -3 , 1110 ng m -3 , respectively.