Simple and Rapid Synthesis of Organically Modified Natural Acid Clay for the Adsorption of Anionic and Cationic Dyes

A simple method for organically modifying a natural acid clay (Japanese clay) rapidly with alkylamine has been developed. Japanese mainly consists of acidic montmorillonite and was successfully modified decylamine in water at room temperature short time period (10 min) using an ultrasonic bath without any pretreatments. The structure the changed from exterior surface modification to intercalation increase content. equilibrium adsorption capacity anionic dye methyl orange (MO) increased increasing kinetics isotherm were well described by pseudo-second-order Langmuir models, respectively. Better MO obtained under conditions high dosage, low pH value, temperature. adsorbent also found have good not only but other dyes (Congo red eosin Y) cationic (methylene blue, crystal violet, rhodamine B). In particular, decylamine-intercalated exhibited level Congo violet. results demonstrate that synthesis process can provide cost-effective organoclay as performance removal dyes.