Mg-Al hydrotalcite-like compound (HTlc), calcined HTlc (CHTlc) and dodecylsulfate anionintercalated Mg-Al HTlc (DS·HTlc) were prepared. The sorption behavior of o-cresol on the HTlc, CHTlc and DS·HTlc was investigated. The sorption kinetics and sorption isotherms of o-cresol on the HTlc, CHTlc and DS·HTlc can all be well fitted with the pseudo-second order kinetic and Freundlich equation, respectively. The results indicated that the sorption rate and sorption amount of o-cresol on the DS·HTlc is much higher than that on the CHTlc, which is little higher than that on the HTlc. The sorption amount of o-cresol on the HTlc and CHTlc increased firstly and then decreased with increasing pH in the initial pH range of 5.00～13.00 and increased with increasing temperature. The sorption amount of o-cresol on the DS·HTlc decreased gradually with increasing initial pH and temperature. The sorption amount of o-cresol on the HTlc, CHTlc and DS·HTlc increased with the increasing electrolyte (NaCl) concentration. The sorption mechanism was discussed in detail and the DS·HTlc will be a new kind of highly effective adsorbent for phenolic pollution.

Key words: Mg-Al hydrotalcite-like compound (HTlc), calcined HTlc, dodecylsulfate ion-intercalated HTlc, o-cresol, sorption