Aggregate Evolution Mechanism during Ion-Adsorption Rare Earth Ore Leaching

Table 2

Elemental mass percent distribution at each measuring point.

Spectrum	C	O	Al	Si	Fe	La	Ce	Nd
(a) Mass percent distribution of the original soil sample
360	5.19	51.13	9.14	20.08	—	1.23	2.89	0.17
361	6.80	36.48	13.67	29.99	—	—	—	0.17
362	9.80	56.99	10.75	15.84	—	—	—	—
363	4.71	63.45	16.22	14.43	0.44	—	—	—
364	5.27	59.17	15.98	14.80	0.61	—	1.36	0.06
365	—	56.17	21.60	20.06	1.18	—	—	—
366	7.09	59.27	18.36	14.90	—	—	—	—
Mean value:	6.48	54.66	15.10	18.58	0.74	1.23	2.12	0.13
Sigma:	1.89	8.84	4.31	5.59	0.38	0.00	1.08	0.07
Sigma mean:	0.71	3.34	1.63	2.11	0.14	0.00	0.41	0.02
	C	O	Al	Si	Fe
(b) Mass percent distribution of spot soil sample A
353	7.61	59.00	17.38	15.74	0.26
354	7.13	56.94	18.87	17.05	—
355	5.09	56.26	20.20	18.44	—
356	5.52	60.24	17.75	16.49	—
357	6.30	55.94	19.71	18.04	—
358	6.79	58.46	18.50	16.01	0.25
359	5.71	52.87	21.68	19.73	—
Mean value:	6.31	57.10	19.16	17.36	0.25
Sigma:	0.92	2.43	1.50	1.45	0.01
Sigma mean:	0.35	0.92	0.57	0.55	0.00
(c) Mass percent distribution of spot soil sample B
346	5.92	59.36	15.38	19.25	0.08
347	6.34	60.93	13.04	18.66	1.02
348	5.08	56.91	22.14	15.84	0.03
349	5.61	60.20	16.07	16.86	1.25
350	5.59	58.79	14.89	20.66	0.06
351	6.84	55.61	16.47	17.21	3.86
352	5.68	58.59	16.33	19.28	0.15
Mean value:	5.87	58.63	13.32	18.25	0.92
Sigma:	0.57	1.84	4.30	1.68	1.39
Sigma mean:	0.22	0.69	1.62	0.63	0.52
(d) Mass percent distribution of spot soil sample C
339	6.27	52.49	16.68	24.55	—
340	8.12	54.26	18.28	19.33	—
341	6.57	56.3	15.44	21.68	—
342	7.35	55.26	16.99	20.39	—
343	5.84	63.19	11.24	19.39	0.33
344	6.38	56.57	18.65	18.39	—
345	7.47	63.96	11.97	16.59	—
Mean value:	6.86	57.43	15.61	20.04	0.33
Sigma:	0.81	4.42	2.94	2.54	0.00
Sigma mean:	0.30	1.67	1.11	0.96	0.00