The authors regret that there were some minor errors in their original paper and apologise for any inconvenience caused. The errors have now been corrected as follows.

In the Abstract, the following sentence has been amended:

Although all treatments effectively removed nitrates, virgin AC was ineffective in PO43−-P removal when concentrations were less than 10 mg/L.

In Figure 2, the caption for part (a) has been amended:

Figure 2
(a) Mean removal efficiency for the four treatments. (b) Concentration of PO43−-P in the negative control with virgin AC.
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(a) Mean removal efficiency for the four treatments. (b) Concentration of PO43−-P in the negative control with virgin AC.

Figure 2
(a) Mean removal efficiency for the four treatments. (b) Concentration of PO43−-P in the negative control with virgin AC.
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(a) Mean removal efficiency for the four treatments. (b) Concentration of PO43−-P in the negative control with virgin AC.

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