This study used dithizon (DZ) and mesoporous as a sorbent for simultaneous removal of heavy metal (mercury, cadmium and copper) ions from aqueous solution and real samples. Santa Barbara Amorphous synthesised and characterised by X-ray diffraction, Fouriertransform infrared spectroscopy and Brunauer-Emmett-Teller. Heavy metal ions measured by atomic absorption spectrometry and inductively coupled plasma optical emission spectrometry. Optimised conditions such as pH, removal time, sorbent dosage and concentration analyte with central composite design and obtained 5, 20 min, 20 mg and 25 ppm, respectively. The equilibrium data were fitted to isotherm models such as Langmuir, Freundlich and Tempkin and the results revealed the suitability of the Langmuir model. The maximum adsorption capacities for Hg 2+ , Cd 2+ and Cu 2+ ions achieved 25.04, 30.3 and 31.79 mg/g, respectively. Kinetics data fitting to pseudo-first order, pseudo-second-order and Elovich models confirmed the applicability of pseudo-second-order kinetic model for the description of the mechanism and adsorption rate. This sorbent could regenerate easily with ethylenediamminetetraacetate solution.
A new, efficient, selective and relatively low cost adsorbent was developed based on Fe3O4@cyclam-SBA-15 for adsorption and determination of lead ions.
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