Comparative analysis of synthesis of GO, CoFe2O4 and CoFe2O4 coated GO and its removal efficiency of arsenic present in the solution

Abstract

A collective process of water purification is designed to reduce or remove the existing water contaminants to make water more applicable. Nanotechnology is considered to be very effective in providing contaminants free water for use. Demand of inexpensive and effective adsorbents is increasing regularly in response to the immeasurable health effects of arsenic exposure through water. The present study covers the procedure of synthesis of Graphene oxide (GO), Cobalt ferrite (CoFe2O4) and CoFe2O4 coated Graphene oxide (GO-CoFe2O4). This study shows that in room temperature at pH of 7, adsorbent dose of 0.4 gm/lit, contact time of 15 min and initial arsenic concentration of 0.2 mg/lit in the solution can be removed with nanoadsorbents with efficiency about 19 % by GO, 79 % by CoFe2O4 and 85 % by GO-CoFe2O4 without considering any other parameters. But efficiency of arsenic adsorption of the prepared nanoadsorbents increased with pre oxidation and increased contact time. Arsenic adsorption efficiency of 40 % using GO, 97 % using CoFe2O4 and 97.5 % using GO-CoFe2O4 has been achieved with pre oxidation and 22 hrs of contact time at pH of 7, adsorbent dose of 0.4 gm/lit, and initial arsenic concentration of 0.2 mg/lit. Based on result obtained, it is established that CoFe2O4 coated GO can be an effective nanoadsorbents for arsenic removal from the solution. This result underlines the need of further study for field application of these nanoadsorbents.