A Study on DSLM Transporting the Rare Earth Metal La (III) with a Carrier of PC-88A

Table 1

Effect of pH in feed phase on transport of rare earths.

Rare earth metal	(min) Migration Time	Item	Results
La(III)	125	pH	3.00	3.30	3.60	4.00	4.30
		−ln/c0	0.0503	0.483	1.40	1.67	1.71
		(m/s)	4.4710^−7	4.2910^−6	1.2510^−5	1.4910^−5	1.5210^−5

Note. Ct and C0 express concentration at time of t and the initial concentration of rare earth metal, respectively, unit: mol/L; Pc expresses permeability coefficient, the unit: m/s.