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Table 4

Kinetic parameters of pseudo-first order and pseudo-second order models for Cd+2 sorption by sorbents

SorbentsPseudo-first order
Pseudo-second order
(min−1)(g·mg−1·min−1)(mg·g−1)
GAC (MC = 5, β-zeolite = 3, bentonite = 7) wt% 0.2218 0.9527 0.0510 6.5189 0.9982 
GAC (MC = 5, β-zeolite = 1, bentonite = 9) wt% 0.2861 0.9461 0.0190 6.9979 0.9917 
GAC (MC = 8, β-zeolite = 1, bentonite = 9) wt% 0.2197 0.9509 0.0270 6.6357 0.9942 
GAC (MC = 5, Cu-β-zeolite = 3, bentonite = 7) wt% 0.3071 0.9326 0.0117 8.1566 0.9946 
GAC (MC = 5, Cu-β-zeolite = 1, bentonite = 9) wt% 0.2699 0.9546 0.0135 7.6394 0.9973 
GAC (MC = 8, Cu-β-zeolite = 1, bentonite = 9) wt% 0.3019 0.9528 0.0222 7.0224 0.9916 
SorbentsPseudo-first order
Pseudo-second order
(min−1)(g·mg−1·min−1)(mg·g−1)
GAC (MC = 5, β-zeolite = 3, bentonite = 7) wt% 0.2218 0.9527 0.0510 6.5189 0.9982 
GAC (MC = 5, β-zeolite = 1, bentonite = 9) wt% 0.2861 0.9461 0.0190 6.9979 0.9917 
GAC (MC = 8, β-zeolite = 1, bentonite = 9) wt% 0.2197 0.9509 0.0270 6.6357 0.9942 
GAC (MC = 5, Cu-β-zeolite = 3, bentonite = 7) wt% 0.3071 0.9326 0.0117 8.1566 0.9946 
GAC (MC = 5, Cu-β-zeolite = 1, bentonite = 9) wt% 0.2699 0.9546 0.0135 7.6394 0.9973 
GAC (MC = 8, Cu-β-zeolite = 1, bentonite = 9) wt% 0.3019 0.9528 0.0222 7.0224 0.9916 
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