. 2020 Dec 14;8(51):19032–19039. doi: 10.1021/acssuschemeng.0c07207

Table 1. Scrubbing Studies for Removal of Co-Extracted Nd(III)^a.

Phase ratio (MP:LP)	[HCl]_scrub, mol L^–1	[Dy(III)]_scrub, g L^–1	%Scrubbing, Nd(III)	%Stripping, Dy(III)
1:1	0.5	0.0	99.3	65.1
	1.0	0.0	100	46.6
	2.0	0.0	96.4	24.4
	1.0	0.9	99.0	^b
	2.0	1.9	99.5	^b
1:2	1.0	0.0	77.3	23.5
	1.0	0.9	81.0	14.8
	1.0	1.9	79.7	^b
	2.0	0.9	81.1	^b
	2.0	1.9	81.5	^b

The variables within the PEG 200 scrub solution were: HCl concentration, Dy(III) concentration, and MP:LP phase ratio. The loaded LP phase contained [Nd] = 0.7 g L^–1 and [Dy] = 0.9 g L^–1. Temperature: 21 ± 1 °C.

Mass balance calculations based on scrub raffinate concentrations indicated that there was net extraction of Dy(III) from the scrub feed, hence no stripping percentage can be mentioned.

Table 1. Scrubbing Studies for Removal of Co-Extracted Nd(III)a.

Table 1. Scrubbing Studies for Removal of Co-Extracted Nd(III)^a.