This work is dedicated to adsorption study of Cd (II) ions by 1-[1-Methyl-2-
(methylamino) ethyl] thiourea modified synthetic rubber. The impact of pH, contact time, initial
metal ion concentration were among the several parameters influencing the adsorption process
that was studied throughout the research. The highest adsorption capacity was achieved with
593.47 mg/g at pH=3 after modification with new thiourea derivative. Five adsorption isotherm
models were examined to explain the adsorption process, and it was found that results are in
agreement with the Redlich–Peterson Isotherm. The Temkin model was examined and found
that there is chemical adsorption occurs in the adsorbent-adsorbate system. Desorption study
are also included in this paper to study regeneration property of the adsorbent. So, 0.5 mol/l
H3PO4 has demonstrated the maximum desorption capability over Cd (II) ions