Soil contamination by heavy metals, such as cadmium, lead, chromium, zinc, mercury and arsenic, is a worldwide concern. The presence of heavy metals in the environment is a major threat to water and soil quality due to their high toxicity to plants, animals and human. Minimizing the production of hazardous heavy metals has become one of the most important environmental challenges that the world faces today. Several treatment technologies have been developed for eliminating heavy metals from solutions. Among these methods, the adsorption and ion exchange using natural absorbents have received a great attention. Clay minerals are considered good absorbents for heavy metals due to their low cost, high abundance, easy manipulation, and harmleess to the environment. The objectives of this study were to investigate the potential of clay deposits containing smectites and palygorskite to absorb cadmium and to reduce its movement into canola and maize. Two selected deposits are located in the Isfahan province. Physical and chemical characteristics of clay deposits were determined. The clay fraction was then separated from each deposit sample. XRD analyses, msubmicroscopic investigations and adsorption isotherm studies were carried out on the clay fraction of both samples. These clays were then used as an amendment to plant growth medium. X-ray diffraction analyses and electron microscope studies (SEM and TEM) showed that palygorskite is the dominant clay mineral in deposit sample no. 1 and smectites in deposit sample no. 2. Both SEM and TEM micrographs of sample 1 indicated the presence of elongated and fibrous-shaped palgorskite bundles. They also showed clearly the irregular plate-like particles of smectites. The adsorption isotherms showed that smectite and palygorskite absorbed cadmium in low and medium concentration. The adsorption data of cadmium fit the Langmuir equation. isotherm reasonably well, but not as well as Freundlich. Pot examination result’s, indicated that smectite and palygorskite very useful in removing cadmium from pollution soils. The unique properties of palygorskite and smectite prepare their for environmental applications. In landfills and toxic soils, a mixture of palygorskite and smectite works well to prevent movements of heavy metal and toxic pollutants and their absorbs. These clays approached to maximum self power. But 2 deposit’s for the reason that having high per cent of smectite as compared with 1 deposit’s, could to prevented at greatly rate from entrance Cd into plants. smectites have very different properties than palygorskite. The high layer charge, the very fine particle size, the thin flakes, the high cation exchange capacity, and the high surface area are more important properties of smectite. Canola and maize planted in pots content smectite t