Abstarct: Drinking water Polluted with Arsenic is a serious thread human health. Millions of people in world wide exposed to drinking water Polluted to Arsenic are with density more then 10 ppb. Today, remove Arsenic from Polluted water it is necessary imperative. For removal arsenic of Polluted water, several methods has been suggested that of among these methods adsorption methods due to high per-formance and economic spending, highly regarded is located. In this study, been tried is that the red mud particales as an a absorbent for the removal to be used arsenic from Polluted water solution. At first, the red mud particles using hydroch loric acid neutral was and it PH receipt to 7.5- 8. Physico chemical propeties of red mud neutralized with HCL acid using analytiacal methods such as XRD, XRF, SEM/EDX and FTIR were studied. The result showed that used adsorbent, containing high percentages of iron oxides aluminum, silicon and hydroxyl groups that plays an important role in the adsorption increase arsenic. Then the effect of the para meters important effecting the adsorption process cincluding pH, reaction time initial concentration and adsorbent value were evaluated. This experiment optimum conditions show that the amount of absorbent 10g, pH6 and 60 minutes contact time best conditions for the removal arsenic of 100ml solution containing 100ppm is the initial concentration of arsenic. In this circumstances (%97.7) of the arsenic was eliminated. Study of the Lonmuir isotherm, Freundlich, Temkin, shows that the adsorption process is more consistent with Freundlich model also, the kinetic studies show that in the pseudo second order equation most the consistent have to with experimental data. Survey the effect of competitive cation on removal efficiency arsenic showed that cations sodium, potassium, calcium and magnesium, do not a significant impact in reducing arsenic removal. The use of natural water samples containing arsenic showed that red mud particles neutralized with hydrochloric acid for remove arsenic from smeary water usable.