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Table 5

Kinetic parameters of pseudo-first order and pseudo-second order models for Pb+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% 0.2169 0.9027 0.0311 7.0621 0.9955 
GAC (MC = 5, β-zeolite = 1, bentonite = 9) wt% 0.2306 0.8673 0.0452 6.5487 0.9975 
GAC (MC = 8, β-zeolite = 1, bentonite = 9) wt% 0.2473 0.9685 0.0249 6.8681 0.9933 
GAC (MC = 5, Cu-β-zeolite = 3, bentonite = 7) wt% 0.2870 0.9282 0.0133 8.0900 0.9950 
GAC (MC = 5, Cu-β-zeolite = 1, bentonite = 9) wt% 0.3145 0.9221 0.0145 7.6308 0.9928 
GAC (MC = 8, Cu-β-zeolite = 1, bentonite = 9) wt% 0.1933 0.9712 0.0264 7.0028 0.9943 
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% 0.2169 0.9027 0.0311 7.0621 0.9955 
GAC (MC = 5, β-zeolite = 1, bentonite = 9) wt% 0.2306 0.8673 0.0452 6.5487 0.9975 
GAC (MC = 8, β-zeolite = 1, bentonite = 9) wt% 0.2473 0.9685 0.0249 6.8681 0.9933 
GAC (MC = 5, Cu-β-zeolite = 3, bentonite = 7) wt% 0.2870 0.9282 0.0133 8.0900 0.9950 
GAC (MC = 5, Cu-β-zeolite = 1, bentonite = 9) wt% 0.3145 0.9221 0.0145 7.6308 0.9928 
GAC (MC = 8, Cu-β-zeolite = 1, bentonite = 9) wt% 0.1933 0.9712 0.0264 7.0028 0.9943 
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