System

Experimental result

 Pseudo-second order model

 Pseudo-first order model

NR /Incinerated paper sludge suspension

Qexp
(mg/g)

Qmax (mg/g)

K2
(g/mg,mn)

R2
(%)

Qe
(mg/g)

K1
(min-1)

R2
(%)

401. 936

384.615

0.0169

0.999

67.050

0.0700

0.899

R2: Regression coefficient
Table 3: Kinetic parameters of NR dye adsorbed onto incinerated paper sludge for [NR] =50mg/L, [Incinerated sludge] =1g/L, pH =5, T=298K and contact time =80min.