. 2019 Aug 28;5(8):e02270. doi: 10.1016/j.heliyon.2019.e02270

Table 4.

Average indoor and outdoor concentrations of PM10 composition. Elements levels in ng/m3 and anions levels in μg/m3.

	S1	S2	S3	S4	S5	S6	S7	Urban outdoor	Industrial outdoor	Rural outdoor
As	6.79	10.63	6.32	4.28	6.86	3.61	6.09	1.38	1.41	1.41
Ni	48.20	60.92	52.59	44.19	64.95	44.15	51.02	4.52	4.07	3.70
Cd	117.67	104.23	82.21	55.09	67.32	73.18	71.87	0.48	0.29	0.43
Pb	937.59	815.67	485.59	422.06	535.22	568.70	808.32	40.32	78.63	44.68
Al	7432.70	12542.06	9979.29	9773.49	11013.64	6231.75	7119.66	883.19	885.28	717.89
B	18155.15	13945.06	16704.42	13272.33	15915.41	12746.92	16201.46	112.52	109.82	119.43
Zn	1584.09	1468.07	1748.90	1610.77	1512.89	1235.81	1395.56	148.04	121.92	145.16
Mg	1685.75	2045.88	2103.94	1848.68	3295.22	1213.44	1332.33	397.80	280.67	222.29
Sb	48.49	56.15	43.95	57.99	39.03	41.54	44.67	26.18	11.72	14.66
Fluoride (F^-)	5.10	5.12	5.15	4.82	5.48	5.40	5.44	0.26	0.26	0.24
Chlorite (ClO₂^-)	5.78	6.86	6.15	5.34	7.41	7.23	5.98	0.25	0.11	0.12
Chloride (Cl^-)	6.57	11.89	7.89	8.21	9.66	11.14	10.13	0.79	0.57	0.23
Nitrate (NO₃^-)	24.12	32.92	23.84	24.03	43.38	38.84	28.22	3.55	3.87	2.03
Sulphate (SO₄^2-)	12.14	21.87	17.49	19.33	29.36	29.14	18.14	2.59	2.54	2.04