Removal of Chromium (VI) metal ions from waste water using alternative adsorbents - A comparative study

Alternative adsorbents like Activated charcoal, modified activated charcoal, wheat bran, activated neem leaf powder and groundnut shell powder were used as adsorbents for effective removal of Cr (VI) ions and thus a comparative study between the adsorbents are presented. Waste water containing Cr (VI) ions was treated with all adsorbents for a calculated amount of time. Further, filtration was carried out and was analysed for Cr (VI) metal ions using Spectrophotometric method. By varying the concentration of the solution and studying its effects we have selected the best result obtained for percentage removal of Chromium for the different adsorbents. Other parameters like time of contact, amount of adsorbent used and pH were also varied and the required result i.e. percentage removal of Chromium is shown.