Table 3.

Thomas model parameters for Pb.²⁺ sorption by Ni-alginate at different bed depths, flow rates, and ions concentrations

Parameters	Flow rate, mL/min			Bed depth, cm			Ions concentration, mg/L
	1.5	3.0	5.0	3.0	5.0	7.0	100	150	200
kTh, mL/mg/min	0.23	0.53	1.19	0.23	0.17	0.16	0.23	0.35	0.59
qTh (Calculated), mg/g	15.75	10.66	8.08	15.75	16.15	17.65	15.75	17.94	19.84
q (Experimental), mg/g	15.70	12.01	8.80	15.70	15.9	16.10	15.70	18.30	22.80
R2	0.98	0.97	0.99	0.98	0.98	0.97	0.98	0.97	0.96