Abstract: Mg-Al hydrotalcite-like compound(HTlc) was prepared by a coprecipitation method. The adsorption behaviors of o-, m- and p-cresol on the Mg-Al HTlc were investigated. The results indicated that the adsorption isotherms of o-, m- and p-cresol on HTlc could be well fitted with the Freundlich equation and the adsorption kinetics could be well described by a pseudo-second-order kinetic. The adsorption rate and adsorption amount of p-cresol on the HTlc is slightly higher than that of o-cresol, which is higher than that of m-cresol at the same equilibrium cresol concentration. The adsorption amounts of o-, m- and p-cresol increased firstly and then decreased with the increasing pH in the rang of 5.00~13.00, increased with the increase of temperature and electrolyte(NaCl) concentration. The adsorption mechanism of cresol on HTlc and the effect of substituent CH3 position on the adsorption were discussed.

Key words: Mg-Al hydrotalcite-like compound, Cresol, Adsorption, Substituent position