Table 6. Contents of Harmful Trace Elements in Coal and Dust.

		content (μg/g)
		LTS		JLS-3		SH		PM2		HB6-3		DY
hazard	element	dust	coal	dust	coal	dust	coal	dust	coal	dust	coal	dust	coal
three	Be	2.0	0.7	1.9	6.5	1.1	0.7	1.5	2.6	0.7	0.9	0.8	0.6
	Cd	0.15	0.0	0.4	0.05	0.08	0.1	0.59	0.1	0.23	0.1	0.09	0.1
	Pb	30.7	3.6	23.1	14.2	23.5	16.2	11.4	7.2	11.4	8.5	13.0	24.8
	Ni	12.3	12.1	20.0	21.0	6.6	1.9	25.8	26.5	2.5	23.9	4.1	1.7
two	As	47.93	0.4	0.6	3.16	2.79	2.9	10.44	0.9	10.31	0.9	8.41	1.4
	Cr	60.8	7.7	48.2	24.2	42.7	14.1	61.3	12.6	33.3	9.1	32.9	8.0
	Co	7.2	2.3	11.2	32.9	6.6	0.1	4.0	6.7	2.8	9.8	3.0	0.5
	Mn	153.6	3.0	98.9	39.9	118.6	28.0	91.9	29.7	100.8	5.0	38.6	19.5
	Th	2.80	0.4	1.2	5.62	2.72	0.3	2.77	0.5	2.56	0.6	2.92	0.3
	U	1.71	1.5	0.3	1.63	0.78	1.2	1.70	1.1	0.57	0.3	0.76	0.3
	B	5.5	2.1	59.3	1.9	6.3	49.5	7.4	1.6	8.9	50.0	8.7	29.9
	Hg	0.14	1.5	0.9	0.07	0.24	0.8	0.11	0.5	0.17	1.0	0.12	1.6
one	Ba	225.3	32.8	535.7	43.6	147.7	86.9	43.6	10.6	136.4	86.3	77.8	48.7
	Sn	9.2	9.6	0.5	5.0	8.6	4.8	9.7	7.2	7.0	4.7	10.4	4.6
	Tl	5.8	0.1	0.9	2.7	6.3	0.6	3.0	0.4	2.7	0.4	3.1	0.6
	V	54.0	5.0	65.6	23.0	16.4	8.1	42.8	7.9	14.4	9.5	17.1	10.1
	Sb	3.4	2.9	4.3	0.2	5.1	1.4	1.4	0.0	1.7	0.0	3.5	1.9
	Se	0.34	0.0	1.5	4.68	1.89	6.2	1.30	5.9	0.56	5.9	5.69	6.3
	Cu	21.0	8.5	21.5	11.3	15.4	9.8	17.6	15.8	14.6	12.5	11.7	7.7
	Mo	1.7	4.0	2.6	1.9	1.8	2.3	16.7	2.7	1.8	2.4	3.6	3.5
	Zn	642.7	2.4	53.2	6.7	60.7	2.9	50.5	11.4	443.6	3.9	61.1	2.9
	Ag	1.8	0.0	0.3	0.8	0.3	0.7	1.8	0.2	0.9	1.3	2.1	0.7
	P	316.2	127.4	134.4	29.5	706.4	62.3	82.3	39.9	362.8	19.5	327.3	51.3