Table 2.

Fitting results of pseudo-first order and pseudo-second order model at different concentrations.

Concentration of SDBS	The pseudo-first order model	qe(exp)/mmol/g	qe(cal)/mmol/g	k1/min−1
3 mmol/L	qt = 0.01772 × (1−e−0.05844×t)	0.0186	0.0177	0.058
4 mmol/L	qt = 0.02416 × (1−e−0.05714×t)	0.0246	0.0241	0.057
5 mmol/L	qt = 0.05722 × (1−e−0.04906×t)	0.0588	0.0572	0.049

Concentration of SDBS	The pseudo-second order model	qe(exp)/mmol/g	qe(cal)/mmol/g	k2/ mmol·g−1·min−1
3 mmol/L	qt = t/(582.6025 + 50 × t)	0.0186	0.0182	4.291
4 mmol/L	qt = t/(430.3774 + 36.75119 × t)	0.0246	0.0241	3.138
5 mmol/L	qt = t/(231.368 + 15.11944 × t)	0.0588	0.0587	0.988