▎ 摘　　要

NOVELTY - Method of treating sodium raffinate wastewater involves esterifying 5 pts. wt. graphene, 6-14 pts. wt. terephthalic acid and 15-20 pts. wt. ethylene glycol at 200 degrees C, reforming at 280 degrees C, obtaining modified graphene heavy metal adsorbent, cooling to room temperature, centrifuging, carrying out adsorption treatment of clarified sodium chloride wastewater using modified graphene heavy metal adsorbent, removing heavy metals and radioactive elements from the filtrate, removing modified graphene by filtration, adding pullulan to adsorb impurities, subjecting clarified sodium chloride wastewater to three-effect evaporation device, centrifuging to separate sodium chloride crystals and recovering condensed water. USE - Method of treating sodium raffinate wastewater. ADVANTAGE - The method efficiently treats sodium raffinate wastewater without affecting the environment and efficiently removes sodium chloride, copper hydroxide, zinc hydroxide, lead hydroxide and radioactive elements. The recovered extractant obtained during the process can be reused. DETAILED DESCRIPTION - The clarified sodium chloride wastewater is obtained by discharging sodium raffinate wastewater into grease trap, installing an adjustable vibration device at the bottom of the grease trap to open the wastewater with slight amplitude for 10-15 minutes, maintaining for 1-2 hours, recovering extractant, obtaining crude sodium chloride wastewater, adding 0.5-1 pt. wt. polyacrylate to 5-10 pts. wt. guar as starting agent, adding sodium hydroxide to catalyze the addition polymerization reaction under alkaline conditions, further adding 1.5-2.5 pts. wt. polyol to branch, preparing demulsifier, passing crude sodium chloride wastewater through demulsification reaction bed, adding demulsifier to the demulsification reaction, demulsifying at the mixing rate of 1000-2000 rpm for 10-12 minutes at the ultrasonic frequency of 27-29 kHz, removing the emulsion, obtaining deoiled sodium chloride wastewater, adding 1-2 mol/L sodium hydroxide solution to demineralized sodium chloride wastewater in primary sedimentation tank, adjusting the pH to 6.5-7, stirring for 1-2 minutes, removing copper hydroxide from stage-I sedimentation tank, subjecting waste liquid into secondary sedimentation tank, adjusting the pH to 8-8.5, stirring for 1-2 minutes such that the secondary sedimentation tank recovers zinc hydroxide, and waste liquid flows into tertiary sedimentation tank, adjusting the pH to 9-9.5, stirring for 1-2 minutes, recovering lead hydroxide, subjecting resultant wastewater to sand filtration treatment through the sand and separating filter residue.