System

Experimental
Results

Langmuir model
Ce/Qe =1/(KLQmax) +Ce/Qmax

 Freundlich model
lnQe=lnKF+ (1/n) lnCe

NR / Incinerated paper sludge suspension

Qexp

Qmax

KL

R2

KF

1/n

R2

(mg/g)

(mg/g)

(L/g)

(%)

(L/g)

 

(%)

374.982

-344.827

-0.0451

35.74

23,4693

1.3746

95.17

R2: Regression coefficient
Table 4: Adsorption isotherm parameters of NR dye adsorbed onto incinerated sludge for [NR] =5-60mg/L, [Incinerated sludge]=1g/L, pH =5, T=298K and contact time =80min.