Immobilization of Lead and Nickel Ions from Polluted Yam Peels Biomass Using Cement-Based Solidification/Stabilization Technique

Table 1

Mathematical expressions of kinetic models.

Kinetic model	Equation	Parameters
Pseudo-first order		qe, adsorption capacity at equilibrium (mg/g); k1, pseudo-1st order constant (min^−1)
Pseudo-second order		k2 pseudo-2nd order constant (g/mg·min); qe, adsorption capacity at equilibrium (mg/g)
Elovich		α, Elovich constant (mg/g min); β, Elovich exponent (g/mg)
Intraparticle diffusion		k, diffusion constant