Table 5. XPS C 1s Analysis Results of Dust.

	relative content (%)
carbon binding form	LTS	JLS-3	SH	PM2	HB6-3	DY
C–C, C–H	78.78	89.88	89.28	88.01	84.07	94.47
C–O	15.43	6.37	7.19	11.5	15.14	4.3
C=O, O–C–O	4.68	2.83	2.98	0.49	0.79	1.23
O=C–O	1.11	0.92	0.55	0	0	0