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9428528 
Journal Article 
Adsorption of trace phthalates on Mg/Al hydrotalcite from aqueous solution 
Wang, L; Gao, X; Guo, JS; Du, R 
2010 
33 
7 
91-96 
Chinese 
Mg/Al hydrotalcite was synthesized by liquid-phase coprecipitation with Mg(NO3)2 · 6H2O and Al(NO3)3 · 9H2O and characterized by x-ray diffraction and thermal analysis. Its adsorptive property to trace phthalates in water is also studied. It is showed that the adsorption processes of dimethyl phthalate (DMP), di-(2-ethylhexyl) phthalate (DEHP) and di-n-octyl phthalate (DnOP) on Mg/Al hydrotalcite simultaneously fitted Langmuir isotherms and Freundlich isotherms in the range of concentration studied, and the saturated adsorption capacities for the three phthalates reach 23.1481, 3.9339 and 8.9206 μg/mg, respectively. The removal rates of the phthalates with time increase rapidly at the beginning and then stabilized gradually, the equilibriums of the three PAEs are reached in 600, 200 and 200 min, respectively. The adsorption of DMP is mainly affected by pH value, temperature and ionic strength. While the adsorption of DEHP is mainly affected by temperature and pH value is for that of DnOP. 
Adsorption; Characterization; Mg/Al hydrotalcite; Phthalates; Preparation; Adsorption process; Adsorptive properties; Aqueous solutions; Di-2-ethylhexyl phthalate; Dimethyl phthalate; Freundlich isotherm; Hydrotalcites; Langmuir isotherm; Liquid Phase; pH value; Phthalates; Preparation; Removal rate; Saturated adsorption capacity; Thermal analysis; Adsorption; Esters; Ionic strength; Isotherms; pH effects; Solutions; Thermoanalysis; X ray diffraction; X ray diffraction analysis; Potassium compounds