The authors regret that there were some errors in their original paper and apologise for any inconvenience caused. The corrections are given below and the paper has been updated online.

On page 7:

Adsorption process analysis and modelling

The results of ANOVA for studying response (MB removal efficiency) were represented in Table 2. The F-value of model (92.71) indicates that the model has a significant level.

On page 9:

Figure 4
Desorption of MB dye on AC at 24 °C.
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Desorption of MB dye on AC at 24 °C.

Figure 4
Desorption of MB dye on AC at 24 °C.
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Desorption of MB dye on AC at 24 °C.

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On page 14:

Figure 8
Isotherm plots (a) Langmuir and (b) Freundlich for MB adsorption on AC at pH of 7.
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Isotherm plots (a) Langmuir and (b) Freundlich for MB adsorption on AC at pH of 7.

Figure 8
Isotherm plots (a) Langmuir and (b) Freundlich for MB adsorption on AC at pH of 7.
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Isotherm plots (a) Langmuir and (b) Freundlich for MB adsorption on AC at pH of 7.

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On Page 15:

formula
(15)
On page 16:
Table 6

Thermodynamic parameters for the adsorption of MB on AC made from grape wood at 24 ± 2 °C

MB conc. (mg L−1)Ko (L g−1)− ΔGo (kJ(K mol)−1)ΔHo (kJ mol−1)ΔSo KJ.mol−1 K−1
100 49 9.6 0.007 32.35 
300 1.12 0.279 0.00018 0.94 
500 1.17 0.395 0.002 1.3 
MB conc. (mg L−1)Ko (L g−1)− ΔGo (kJ(K mol)−1)ΔHo (kJ mol−1)ΔSo KJ.mol−1 K−1
100 49 9.6 0.007 32.35 
300 1.12 0.279 0.00018 0.94 
500 1.17 0.395 0.002 1.3 
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The authors gratefully acknowledge the Research Council of Kermanshah University of Medical Sciences for the financial support through grant number 4000833.

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