Effective and reusable nano-silica synthesized from barley and wheat grass for the removal of nickel from agricultural wastewater.

In the present study, a comparative analysis was performed on the extraction of nickel ions (Ni) from agricultural wastewater using nanosilica (NS) synthesized from barley (NS-B) and wheat (NS-W) grass waste with a yield of 92.4%. The experimental procedure was conducted on barley and wheat waste to obtain an 85% pure NS that served as the adsorbent for nickel extraction in wastewater.