Removal of iron from salt water entering the chlor-alkali membrane system using activated carbon adsorbent to reduce environmental damage

Heavy metal ions have deadly and deadly effects on all life forms and enter the food chain through the disposal of waste in water channels. One of the most important heavy metals is iron. There are several methods used to remove heavy metal ions. The adsorption method is widely used due to its easy operation, low energy consumption, easy maintenance, high adsorption capacity and high efficiency. Activated carbon as an adsorbent with high adsorption capacity and low cost, has many applications in heavy metal removal processes. The purpose of this paper is to remove iron (III) ions from brine entering the chlorinated alcohol system using activated carbon adsorbent to reduce environmental damage. In order to achieve this goal, after preparation of activated carbon adsorbent, and its contact with salt water of chlor-alkali unit containing iron (III) ion, the effect of adsorbent amount factors (0.5 to 2 g/l), contact time (15 to 120 minutes) and pH (3 to 9) were assessed. Based on the results of this study, pH=7 was determined as the optimal pH and 90 minutes as the equilibrium time. with increasing the amount of adsorbent, the removal percentage increased and the maximum removal percentage of iron ions in the amount of 2 g/l of activated carbon adsorbent was obtained. Also, the effect of contact time, pH and the amount of activated carbon adsorbent on the process of iron ion removal was significant (p<0.05).