Adsorption of 2-picoline and 3-Amino-2-picoline onto Kaolin and Organo-modified Kaolin

摘要

The adsorption of 2-picoline (PC) and 3-Amino-2-picoline (APC) onto kaolin and organo-modified kaolin was investigated. Tetraethylamoniumiodide (TEAl) was used as modification reagent. The sorbent was characterized by FTIR, XRD, SEM and BET methods. The influence of various parameters like contact time, PH, adsorbent dose and initial concentration of PC and APC was studied. The adsorption kinetics, thermodynamic and isotherms were thoroughly examined. Results show that a pH value of more than 6 and contact time 60 min is favorable for adsorption. The dynamic data fit well with the pseudo- first-order kinetic model. Thermodynamic results revealed that the adsorption process is an endothermic and spontaneously process. The isothermal data could be well described by the Freundlich equation. The results indicate that kaolin/TEAl could be employed as low cost sorbent for removal of organic pollutant from water.