Using of surfactant modified Fe-pillared bentonite for the removal of pentachlorophenol from aqueous stream

The first part of this work considers the preparing of the adsorbent type Montm-FeOH-CTAC. After purification of two types Algerian bentonites (Maghnia and Mostaghanem) and preparation of cationic polyhydroxy ferric solution, we have optimized following parameters: CTAC/Montm.-FeOH= 7 mmol.g(-1) and pH=3.4, in order to obtain the adsorbent with maximum uptake of PCP. The study of the different experimental equilibrium isotherms showed clearly the high efficiency of these new adsorbents toward PCP, with significant quantities adsorbed especially onto Maghnia samples in acidic environment. Using two mathematical models Langmuir and Freundlich was found to be the Freundlich the best fitted. A comparative study of PCP adsorption onto the two modified clays and an activated carbon in the same conditions has been done.