Analysis of iron-rich hydrochloric acid solutions for uranium, thorium, rare-earth elements and other heavy metals

Journal of Analytical Science and Technology

Table 5 Analytical data of trace constituents in spent HCl (138 g/L Fe) and recovered HCl (23 g/L)

Element	Unit	Spent HCl containing 138 g L⁻¹ Fe			Recovered HCl containing 23 g L⁻¹ Fe
		Solvent extraction using MIBK (n = 5)	Matrix matched calibration (n = 5)		Solvent extraction using MIBK (n = 5)	Matrix matched calibration (n = 5)
		ICP-OES	ICP-OES	AAS	ICP-OES	ICP-OES	AAS
Mn	g L⁻¹	1.67	1.73	1.60	0.23	0.24	0.21
Mg	g L⁻¹	2.60	2.35	2.55	0.37	0.36	0.34
Al	g L⁻¹	1.50	1.48	1.55	0.23	0.22	0.25
Ti	mg L⁻¹	32	25	–	7	7	–
Ca	mg L⁻¹	355	350	360	78	80	70
V	mg L⁻¹	310	300	–	47	46	–
Cu	mg L⁻¹	9	10	10	1.6	1.7	2
Zr	mg L⁻¹	< 1	< 1	–	< 1	< 1	–
Th	mg L⁻¹	38	40	–	6	7	–
Zn	mg L⁻¹	128	86	137	21	23	25
Pb	mg L⁻¹	48	30	51	6	6	8
Co	mg L⁻¹	25	18	23	4	4	3
Ni	mg L⁻¹	15	10	17	2.5	2	2
Cr	mg L⁻¹	185	130	–	28	29	–
Sr	mg L⁻¹	25	22	–	3	3	–
U*	mg L⁻¹	0.68	–	–	0.33	–	–