Table 3.

R_L values based on the Langmuir equation for Y³⁺ binding at pH = 6.

Y3+ initial concentration, mg·L−1	RL value
	ι-carrageenan	κ-carrageenan	λ-carrageenan
20	0.749	0.882	0.861
40	0.599	0.788	0.756
60	0.499	0.713	0.673
80	0.427	0.650	0.608
100	0.374	0.598	0.553