Correction: Reusable bentonite clay: modelling and optimization of hazardous lead and p-nitrophenol adsorption using a response surface methodology approach.

[This corrects the article DOI: 10.1039/C9RA00079H.]. This journal is © The Royal Society of Chemistry.

In the published article there was an error in the naming of the pollutant Pb2+ in Table 9 on p. 5763. The correct version of this table is shown here below.

Thermodynamic parameters for Pb2+ and p-nitrophenol adsorption onto BC-500

	ΔH (kJ mol−1)	ΔS (kJ mol−1 K−1)		ΔG (kJ mol−1)
				293 K	313 K	333 K
Pb2+	−104.499	−0.201	K C	184 568 580	3 415 381.2	1 126 960.8
				−46.365	−39.148	−38.580
p-Nitrophenol	−132.467	−0.303	K C	123 915 710.3	362 868.435	199 963.6695
				−463.657	−33.313	−33.792

The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.