In this investigation, the removal of Cr+ 6 ions in a semi continuous packed bed column by adsorption using a low cost adsorbent material which is Iraqi Rice Husk (IRH) at different operating conditions of pH, flow rates of polluted solution through the bed, weight of IRH and time of treatment was studied for two different initial concentration of Cr+ 6 ions. The results show that all factors have a significant effect on the percentage removal of Cr+ 6 ions from aqueous solutions and the optimum pH, flow rate, weight of IRH and time of treatment are 2, 10 ml/min, 50 g and 120 min respectively for two initial concentrations of Cr+ 6 ions. Freundlich and Langmuir adsorption isotherms were also applied and they showed good fits to the experimental data. A comparison of kinetic models applied to the adsorption of Cr+ 6 ions on the IRH was evaluated for the first order, pseudo first-order and pseudo second-order kinetic models, respectively. The results show that the pseudo first-order kinetic model was found to correlate with the experimental data well. A mathematical model is proposed for a packed bed isothermal adsorption column with a porous adsorbent. The mathematical model takes account of both external and internal mass-transfer resistances as well as of non-ideal plug flow along the column. A statistical model is also devised to find an expression that relates the overall operating parameters used in this investigation in a general equation. Samples of the Iraqi rice husk remaining after use in the removal of Cr+ 6 ions from the aforementioned aqueous solutions were taken to study the utilization of IRH as a raw material in the synthesis of promoted type Y-zeolite catalyst and compared with normal type Y-zeolite catalyst prepared from IRH alone in the process of n-heptane isomerization. The results show that the promoted type Y-zeolite catalyst gives a higher conversion of n-heptane to isomer substances than the normal type Y-zeolite catalyst.