Sorption Efficiency of a New Sorbent towards Cadmium(II): Methylphosphonic Acid Grafted Polystyrene Resin

Table 3

The regression equations (𝑦), regression coefficients (𝑟), and diffusion coefficients (𝐷_𝑟).

[Cd(II)], mmol·L^−1		Eq. (10)	Eq. (11)	Eq. (13)
0.5	𝑌	0.106𝑡	0.098𝑡	0.024𝑡
	𝑟	0.925	0.932	0.900
	𝐷𝑟, 10^−5, cm²·min^−1	—	2.485	—
1.0	𝑌	0.062𝑡	0.040𝑡	0.015𝑡
	𝑟	0.941	0.951	0.945
	𝐷𝑟, 10^−5, cm²·min^−1	—	1.014	—