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Abstract
Adsorption removal of actinide and lanthanide ions from aqueous solutions using modified synthetic humic acid magnesia cement was investigated. Experiments were carried out as a function of solute concentration and temperature (25–50°C). Several kinetic models were used to test the experimental rate data and to examine the controlling mechanism of the adsorption process. Various parameters such as effective diffusion coefficient, activation energy and entropy of activation were evaluated. The study showed that the pore diffusion is the rate limiting for the metal ions studied. The results indicated that modified synthetic humic acid magnesia cement (MF‐2) can be used as an efficient adsorbent for removal of actinide and lanthanide ions from radioactive wastewaters.