Influence of the Branched Structure of Polyoxyethylene Units in Nonionic Surfactants on the Wettability of Anthracite: A Combined Modeling and Experimental Study

Table 6

Peak positions, areas, and atomic assignments of C 1s on the surface of anthracite after adsorption.

Groups	Tween 20		C12(EO)20
	Binding energy (eV)	PR (%)	Binding energy (eV)	PR (%)
C-C/C-H	284.80	45.00	284.80	75.61
C-O	285.12	38.31	286.58	12.28
C=O	286.43	12.15	288.56	3.81
COO	289.62	4.54	290.43	8.30