Spatial Extent and Distribution of Ambient Airborne Particulate Matter (PM_2.5) in Selected Land Use Sites in Nairobi, Kenya

Table 3

The correlation coefficient r between average concentrations of the elemental composition of PM_2.5 in selected land use sites in Nairobi City County.

	K	Ca	Ti	Mn	Fe	Cu	Zn	As	Ga	Br	Zr	Pb	PM2.5
K	1
Ca	0.699	1
Ti	0.5935	0.9343	1
Mn	0.5861	0.8092	0.8195	1
Fe	0.6431	0.9481	0.9897	0.8468	1
Cu	0.3319	−0.1172	−0.1784	−0.3386	−0.1831	1
Zn	0.686	0.842	0.8678	0.6963	0.8907	−0.1798	1
As	0.4538	0.052	−0.0165	0.3042	−0.01	−0.1177	0.0964	1
Ga	0.7395	0.617	0.7064	0.6573	0.6698	0.123	0.6114	0.5384	1
Br	0.7406	0.738	0.54	0.6403	0.5527	0.0695	0.5699	0.5073	0.5876	1
Zr	0.5212	0.7385	0.5783	0.6522	0.5615	−0.256	0.4902	0.5051	0.5555	0.8911	1
Pb	0.6436	0.6457	0.4841	0.2798	0.45	0.4552	0.4347	0.1783	0.5416	0.8079	0.6904	1
PM2.5	0.8349	0.8407	0.8288	0.6827	0.8099	0.2824	0.7236	0.2565	0.8793	0.7522	0.6452	0.7964	1