. 2022 Nov 29;15(23):8494. doi: 10.3390/ma15238494

Table 1.

Chemical composition of three coal ash samples (%, μg/g).

Elements	CA1	CA2	CA3	Elements	CA1	CA2	CA3
SiO₂	44.15	25.19	52.17	La	46.73	88.64	80.65
Al₂O₃	46.83	57.37	23.89	Ce	77.50	191.61	193.19
Fe₂O₃	1.35	2.587	12.1	Pr	10.63	21.98	22.47
CaO	1.56	2.84	2.36	Nd	34.62	89.64	88.66
MgO	0.07	0.16	1.91	Sm	6.67	16.92	17.22
TiO₂	0.96	2.07	2.77	Y	37.40	57.93	65.17
K₂O	0.20	0.35	0.69	Eu	1.11	3.84	3.33
Na₂O	0.23	0.67	0.58	Gd	6.06	14.89	15.53
S	0.19	0.31	0.22	Tb	1.15	2.18	2.20
P	0.07	0.10	0.14	Dy	7.38	12.71	13.60
				Ho	1.45	2.40	2.58
				Er	4.37	6.58	7.17
				Tm	0.62	0.92	1.01
REY	240.20	516.80	520.27	Yb	3.95	5.73	6.57
C_outl	0.97	0.86	0.88	Lu	0.57	0.82	0.94