Table 1.

Kinetic model parameters of spandex dyeing with neutral red G.

	Pseudo–First-Order Kinetic			Pseudo–Second-Order Kinetic			Time of Adsorption Dyeing t1/2/min
	k1/min−1	qe/mg × g−1	R2	k2K2 g/mg × min	qe/mg × g−1	R2
Dyeable spandex	0.4052	19.5007	0.8481	0.1497	19.5007	0.9998	0.3424
Ordinary spandex	0.0266	10.9745	0.9645	0.0043	10.9745	0.9689	20.2853