Table 1.

Chemical elements in the size-resolved particles from Xuanwei raw coal combustion (XRF) (μg/g).

	Coarse Particles			Fine Particles	Submicron Particles
	>7.0 μm	3.3–7.0 μm	2.0–3.3 μm	1.1–2.0 μm	<1.1 μm
Na	891.45	480.61	71.16	27.26	130.77
Mg	5215.94	2284.15	234.06	51.26	36.68
Al	3926.18	1818.40	278.81	49.63	369.00
P	9.48	4.95	0.45	0.41	0.86
S	2693.32	629.26	322.67	244.08	1267.11
Cl	322.44	104.05	105.17	103.73	4190.61
K	246.57	123.87	12.08	16.27	8.20
Ca	104.32	89.19	8.50	4.47	26.76
Sc	9.48	4.95	1.34	1.63	18.13
Ti	9.48	4.95	0.45	0.00	0.43
V	9.48	0.00	0.00	0.00	1.29
Cr	9.48	4.95	2.69	1.63	0.43
Mn	9.48	0.00	0.90	0.41	0.43
Fe	2976.69	2045.68	1399.80	1187.81	263.17
Co	37.93	19.82	0.45	0.00	0.43
Ni	85.35	49.55	4.48	5.70	0.00
Cu	37.93	4.95	0.45	0.41	0.43
Zn	37.93	9.91	1.79	3.66	8.63
Ga	9.48	0.00	0.00	0.41	0.43
As	9.48	0.00	0.45	0.41	5.18
Se	18.97	4.95	2.69	2.44	58.69
Br	85.35	29.73	14.77	12.61	444.09
Sr	9.48	4.95	0.45	0.00	0.86
Ba	28.45	24.77	6.71	2.03	10.36
Pb	28.45	0.00	0.00	0.00	55.67