Eliminating environmental problems such as high concentration of heavy metal pollutants in wastewaters is considered today as one of the main concerns should be cared. Heavy metal contaminations can be successfully removed by using the absorption process. In this project, calcium carbonate, as an adsorbent, were produced in the colloidal gas aphron (CGA) system. There are different morphologies and polymorphs of calcium carbonate. The effects of surfactant concentration and temperature on the morphology and crystalline structure of calcium carbonate particles were investigated in the first step of this study. Experimental results show that increase in the surfactant concentration leads to a shift in the morphology of calcite cubic particles, with 2.5µm size, to spherical particles with 200nm diameters. The experimental data also show that increasing the concentration of the surfactant from 100mg/L to 600mg/L in the CGA system results in the phase shift from calcite to vaterite particles. Moreover, analyzing the effect of temperature showed that increasing the temperature from 25?C to 75?C results in production of rod-like particles of aragonite when surfactant concentrations were 100mg/L and 200mg/L while this change was not observed in 400mg/L and 600mg/L of this surfactant. However, increase in the temperature reduced the particle size. The synthesized rod-like aragonite particles were used as the absorbent of cadmium ions from the aqueous environment in the second step of this study. The surface response methodology was used to investigate the effects of various important factors, including temperature (from 25?C to 65?C), absorbent concentration (from 0.5g/L to 1.5g/L), and the concentration of metal ions (from 50mg/L to 200mg/L), on the absorption process. Analysis of Langmuir isotherms showed that the produced particles have good capability in removal of cadmium ion with adsorption capacity of 167mg cadmium /g of adsorbent. The results showed that the equilibrium condition is established after two hours. A pseudo-second order model well fitted the experimental data (R 2 0.99). The optimized amounts of temperature, metal ion concentration, and absorbent were predicted by RSM were 61.52?C, 195.09mg/L, and 0.53g/L, respectively. The optimized absorption rate by the software was 92.42mg/g, rather than empirical rate 89.35mg/g adsorbent. Key words : Calcium carbonate structures, Colloidal gas aphron, Heavy metal removal, Cadmium ion, Surface response methodology (RSM)