APR	Average percentage removal
CCD	Central Composite Design (Circumscribed)
FTIR	Fourier-transform infrared
IPD	Intraparticle diffusion
IPD1	Intraparticle diffusion with one term
MPR	Modelled percentage removal
PFO	Pseudo-first order
PR	Percentage removal
PSO	Pseudo-second order
SE	Standard error of regression
TWAC	Tobacco waste activated carbon
VM	Volatile matter