. 2010 Apr 1;8(4):1106–1121. doi: 10.3390/md8041106

Table 4.

R_L values based on the Langmuir equation for Pb²⁺ binding at pH = 6.

Pb²⁺ initial concentration, mg·L⁻¹	R_L value
Pb²⁺ initial concentration, mg·L⁻¹	ι-carrageenan	κ-carrageenan	λ-carrageenan
20	0.609	0.781	0.877
40	0.438	0.641	0.781
60	0.342	0.543	0.704
80	0.281	0.472	0.641
100	0.237	0.417	0.588