Ambient Particulate Matter Air Pollution in Mpererwe District, Kampala, Uganda: A Pilot Study

Table 2

PM_2.5 mass (μg/m³) and species concentrations (ng/m³).

PM2.5 species	December 31, 2012-January 1, 2013	January 2, 2013-January 3, 2013
Mass	104.9	103.7
Cl^−	1983.5	1160.5
NO3^−	2547.1	1502.4
SO4^2−	3542.0	1381.7
Na^+	445.4	198.7
NH4^+	141.3	97.6
K^+	2705.4	1803.4
Ca^2+	2409.5	959.2
Mg^2+	222.5	125.8
Al	5450.9	4097.6
Si	9756.6	6739.5
Ca	3356.8	1628.8
Ti	779.2	491.7
Fe	7616.0	5400.2
V	10.3	7.9
Ni	3.2	11.1
K	2969.2	1976.1
Se	0.0	0.7
Cl	1958.7	1047.5
Br	40.9	28.3
As	7.8	2.3
Pb	22.9	18.6
Zn	90.0	79.4
S	1311.7	632.7