Study on Gas Flow Expansion Carbonization of Waste Amine Oxime Resin and Its Adsorption of Pb2+
The amine oxime resin,as an adsorption resin for gallium,fails after 1 month of repeated adsorption-desorption,and the pore collapse functional group fails,resulting in a large amount of waste resin every year.In order to resource utilization of waste amine oxime resin,we proposed the"popcorn"type airflow expansion method to expand the pore of waste amine oxime resin and investigate the adsorption behavior of the expanded resin on Pb2+ions in solution.The results of the puffing and adsorption experiments showed that the water content,tank preheating temperature and puffing pressure of the waste amine oxime resin had a significant effect on the puffing effect;the saturation capacity of the puffing resin for Pb2+ in solution was 221.02 mg/g,and the adsorption was in accordance with the quasi-secondary kinetics(R2=0.9999)and the Langmuir isothermal model(R2=0.9906),mainly by chemisorption.The results provide a new adsorption material for the regeneration of waste amine oxime resin and the treatment of lead-containing wastewater in solution,and provide a new way for the resource treatment of waste amine oxime resin.
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