Studying the Possibility of Using a Carbon Sorbent Based on a Graphite Nitrate Cointercalation Compound for Water Purification from Heavy Metal Ions

The results of studies of the carbon sorbent adsorption properties by atomic absorption spectrometry are presented. Carbon sorbent was obtained by graphite nitrate cointercalation compound thermal expansion at 900 °C. It is shown that the Freundlich, Langmuir and Temkin equations adequately describe the adsorption of the studied metal ions by a carbon sorbent. The carbon sorbent after the adsorption of heavy metal ions was studied using energy-dispersive X-ray spectrometry and X-ray powder diffraction. The limit values were fixed for the adsorption capacity of the sorbent relative to Cu2+, Ni2+, Fe2+ as 0.94; 0.85 and 0.58 mmol/g sorbent, respectively. It was concluded that the conducted studies indicate the possibility of using such sorbent in processes of water purification from heavy metal ions.