Experimental Study on Selective Adsorption of Cr from NaOH-containing Basic Extracting Solution of Vanadium Slag AITranslate
Abstract AITranslate
Vanadium slag was subjected to pelleting with NaOH,roasting,leaching with water and filtering to obtain strongly basic vanadium slag extracting solution with the pH value of 13.1.A weakly basic anionic exchange resin B containing amino functional group[-CH2 NH（CH2 CH2 NH）nH]＋was directly added into the extracting solution for selective adsorption experiments.The adsorption behavior of Cr ions in the extracting solution was studied.The results show that when the absorption temperature is 20℃,30℃and 40℃,Cr adsorption equilibrium time is 24 h,7 hand 7 h,respectively.When the adsorption temperature is raised from 20 ℃to 30 ℃,Cr adsorption amount dramatically increases.The optimal adsorption temperature is 30℃and Cr equilibrium adsorption amount is 217 mg/g in this case.Cr ion adsorption follows pseudo-first-order adsorption kinetic model.When the adsorption temperature is raised from 20 ℃to 30 ℃,Cr adsorption rate increases by about 2 times.The internal diffusion of Cr ions in the resin pores is the controlling step of adsorption rate.Cr adsorption amount increases with the initial Cr concentration increasing.Thermodynamically,Cr ion adsorption is consistent with the Langmuir model,the Freundlich model and the DKR model,but it is closest to the Freundlich model.Based on the DKR model,the apparent adsorption energy of Cr ions is 5 000 J/mol,7 071 J/mol and 7 071 J/mol,respectively at the absorption temperature of 20 ℃,30 ℃ and 40 ℃.
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DOI：
Chinese Library Classification Number:TF804.3[冶金工程—有色金属冶金]
Citation Information:
Vanadium slag was subjected to pelleting with NaOH,roasting,leaching with water and filtering to obtain strongly basic vanadium slag extracting solution with the pH value of 13.1.A weakly basic anionic exchange resin B containing amino functional group[-CH2 NH（CH2 CH2 NH）nH]＋was directly added into the extracting solution for selective adsorption experiments.The adsorption behavior of Cr ions in the extracting solution was studied.The results show that when the absorption temperature is 20℃,30℃and 40℃,Cr adsorption equilibrium time is 24 h,7 hand 7 h,respectively.When the adsorption temperature is raised from 20 ℃to 30 ℃,Cr adsorption amount dramatically increases.The optimal adsorption temperature is 30℃and Cr equilibrium adsorption amount is 217 mg/g in this case.Cr ion adsorption follows pseudo-first-order adsorption kinetic model.When the adsorption temperature is raised from 20 ℃to 30 ℃,Cr adsorption rate increases by about 2 times.The internal diffusion of Cr ions in the resin pores is the controlling step of adsorption rate.Cr adsorption amount increases with the initial Cr concentration increasing.Thermodynamically,Cr ion adsorption is consistent with the Langmuir model,the Freundlich model and the DKR model,but it is closest to the Freundlich model.Based on the DKR model,the apparent adsorption energy of Cr ions is 5 000 J/mol,7 071 J/mol and 7 071 J/mol,respectively at the absorption temperature of 20 ℃,30 ℃ and 40 ℃.
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| GB/T 7714-2015 | [1] XUE Yuan, CHEN Yang, JI Yi-long, et al. Experimental Study on Selective Adsorption of Cr from NaOH-containing Basic Extracting Solution of Vanadium Slag[J]. Rare Metals and Cemented Carbides, 2018(1): 14-20. |
| MLA | [1] XUE Yuan, et al., "Experimental Study on Selective Adsorption of Cr from NaOH-containing Basic Extracting Solution of Vanadium Slag." Rare Metals and Cemented Carbides, no. 1, 2018, pp. 14-20. |
| APA | [1] XUE Yuan, CHEN Yang, JI Yi-long, & SHEN Shao-bo. (2018). Experimental Study on Selective Adsorption of Cr from NaOH-containing Basic Extracting Solution of Vanadium Slag. Rare Metals and Cemented Carbides(1), 14-20. |
| IEEE | [1] XUE Yuan, CHEN Yang, JI Yi-long, and SHEN Shao-bo, "Experimental Study on Selective Adsorption of Cr from NaOH-containing Basic Extracting Solution of Vanadium Slag," Rare Metals and Cemented Carbides, no. 1, pp. 14-20, 2018. keywords: {basic extracting solution of vanadium slag;pelleting with NaOH;Cr ion adsorption;weakly basic} |