Abstract
A comparative evaluation adsorption of(140)La and(144)Ce from water solutions on chemical ZnO (ZnO-C) and green synthesis ZnO (ZnO-G) by Nerium oleander flowers extract. Various parameters including pH, time and concentration were optimized to achieve maximum adsorption capacity. The adsorption efficiency of(140)La and(144)Ce was 59 and 69 on ZnO-G and 61 and 44% on ZnO-C respectively. Langmuir and pseudo-second order kinetic models were best suited to explain the adsorption process. The amount adsorbed of(140)La and(144)Ce ions at equilibrium (q(e)) was 23.9 and 27.8 on ZnO-G and 17.8 and 24.5 mg/g on ZnO-C respectively.