Adsorption of Rhenium in Arsenic Reduction Solution by Macroporous Resin
The adsorption and desorption properties of MTA1701 and RCX5143 macroporous weak basic anionic resins for rhenium recovery in arsenic reduction solution were studied.The effects of pretreatment method,time,temperature,acidity and equilibrium concentration on adsorption of rhenium using resin were investigated by static adsorption.Static desorption of ammonia water was used to investigate the effects of ammonia concentration,desorption volume ratio,desorption time and desorption times on the desorption rate of supported resin.The results show that the properties of the two resins are similar,and the adsorption reaction of the resin is in accordance with the quasi-second-order reaction kinetics model after the pretreatment of sulfuric acid soaking.The thermodynamic results show that decreasing temperature is beneficial to the adsorption of rhenium.The static equilibrium adsorption capacity decreased with the increase of acidity and increased with the increase of equilibrium concentration.Under the conditions of ammonia concentration of 10％,V(ammonia)∶V(resin)of 2∶1,desorption time of 20 min for 2 times desorption,the desorption rates of the two resins are all greater than 99.5％.
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