从负载Cu(Ⅱ)的离子液体中反萃除Cu(Ⅱ)的研究
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摘要
离子液体三辛基甲基氯化铵(Aliquat 336)作为一种绿色溶剂,萃取完成后的回用十分重要。开展了Aliquat 336中Cu(Ⅱ)的高效反萃技术研究。通过实验筛选确定NaCl是从Aliquat 336中反萃除Cu(Ⅱ)最有效的反萃剂,并着重考察了反萃剂NaCl浓度、反萃时间、温度对Aliquat 336中Cu(Ⅱ)反萃效率的影响;当Aliquat 336中Cu(Ⅱ)的负载质量浓度为14 g/L、有机相和反萃液的体积比(Vo∶Vaq)为1∶5时,常温下1 mol/L NaCl对Aliquat 336中Cu(Ⅱ)的反萃率可达97.2%;Aliquat 336可多次循环回用,循环回用4次后其萃取率仍可达80%以上。以NaCl作为反萃剂,不仅提高了Aliquat 336的回用效率,同时有利于Cu(Ⅱ)在反萃液中的富集和进一步资源化利用。
For the ionic liquid,Aliquat 336(trioctylmethylammonium chloride) as a green solvent,it is important to recycle after the extraction is complete.The research on stripping Cu( Ⅱ) from Aliquat 336 has been carried out.The results showed that NaCl was the strongest stripping agent of stripping Cu(Ⅱ) from Aliquat 336 and the effects of NaCl concentration,stripping time and temperature on stripping Cu(Ⅱ) from Aliquat 336 were investigated.When the loading mass concentration of Cu(Ⅱ) in Aliquat 336 was 14 g/L,and thevolume ratio of organic phase to stripping agent(Vo∶Vaq) was 1∶5,the stripping ratio could reach 97.2% of stripping Cu(Ⅱ) from Aliquat 336 with 1 mol/L NaCl at room temperature.Aliquat 336 can be recycled.After four times of recycling,the extraction rate could still reach more than 80%.Using NaCl as a stripping agent not only improved the efficiency of Aliquat 336 recycling,but also facilitated the enrichment and further utilization of Cu(Ⅱ) in the stripping solution.
For the ionic liquid,Aliquat 336(trioctylmethylammonium chloride) as a green solvent,it is important to recycle after the extraction is complete.The research on stripping Cu( Ⅱ) from Aliquat 336 has been carried out.The results showed that NaCl was the strongest stripping agent of stripping Cu(Ⅱ) from Aliquat 336 and the effects of NaCl concentration,stripping time and temperature on stripping Cu(Ⅱ) from Aliquat 336 were investigated.When the loading mass concentration of Cu(Ⅱ) in Aliquat 336 was 14 g/L,and thevolume ratio of organic phase to stripping agent(Vo∶Vaq) was 1∶5,the stripping ratio could reach 97.2% of stripping Cu(Ⅱ) from Aliquat 336 with 1 mol/L NaCl at room temperature.Aliquat 336 can be recycled.After four times of recycling,the extraction rate could still reach more than 80%.Using NaCl as a stripping agent not only improved the efficiency of Aliquat 336 recycling,but also facilitated the enrichment and further utilization of Cu(Ⅱ) in the stripping solution.
引文
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[3] Earle M J,Seddon K R.Ionic liquids-green solvents for the future[J].Pure and Applied Chemistry,2000,72(7):1391-1398.
[4] Rogers R D,Seddon K R.Ionic liquids:Solvents of the future[J].Science,2003,302(5646):792-793.
[5]张琰,赵其阳,张耀海,等.温控辅助离子液体分散液-液微萃取-高效液相色谱检测果汁中杀菌剂残留[J].食品科学,2015,36(4):202-207.
[6] Xue Linke,Ma Weiwei,Zhang Dongxia,et al.Ultra-sound-assisted liquid-liquid microextraction based on an ionic liquid for preconcentration and determination of UV filters in environmental water samples[J].Anal.Methods,2013,5(13):4213-4219.
[7] Zhou Qingxiang,Gao Yuanyuan.Combination of ionic liquid dispersive liquid-phase microextraction and high performance liquid chromatography for the determination of triazine herbicides in water samples[J].Chin.Chem.Lett.,2014,25(5):745-748.
[8] Abolhasani J,Amjadi M,Kalhor E G.Ultra-trace determination of copper and silver in environmental samples by using ionic liquidbased single drop microextraction-electrothermal atomic absorption spectrometry[J].Jurnal of Chemical Health Risks,2013,3(3):29-42.
[9] Shirkhanloo H,Sedighi K,Mousavi H Z.Determination of trace amount of lead in industrial and municipal effluent water samples based on dispersive liquid-liquid extraction[J].J.Mex.Chem.Soc.,2014,58(2):137-141.
[10]李晓敏,耿存珍.离子液体的环境风险评价[J].环境科技,2013,26(5):67-72.
[11]王伟平.阳离子季铵盐表面活性剂的合成及应用性质研究[D].西安:陕西科技大学,2009.
[12]谢瑜,张昌辉,徐旋.聚合季铵盐阳离子表面活性剂的合成和性能研究[J].日用化学品科学,2008,31(2):21-24.
[13] Nabi S A,Sheeba K N,Khan M A.Chromatographic separations of metal ions on strong acid[J].Acta Chromatogr,2005,15:206-219.
[14] Lin S H,Juang R S.Simultaneous extraction and stripping of EDTAchelated metallic anions with Aliquat 336 in hollow fiber contactors[J].Chemical Engineering Science,2002,57(1):143-152.
[15] Ju F,Hu Y Y.Removal of EDTA-chelated copper from aqueous solution by interior microelectrolysis[J].Separation&Purification Technology,2011,78(1):33-41.
[16]周展云,傅建顺.从季铵盐负载有机相中反萃金银铜[J].贵金属,1991(2):11-18.
[17]严明英.使用LIX87QN共同萃取和选择性反萃铜和镍[J].重庆钢研,2003(28):51-58.
[18]傅建顺,周展云.用硫脲从季铵盐萃取液中反萃金,银,铜的探索[J].化学工业与工程,1990(3):17-20.
[19]何海峰,游贤贵.用叔胺从氯化镍溶液中萃取铜和钴并分段反萃钴和铜的工业试验研究[J].四川有色金属,1999(1):26-30.
[20] Nayl A A,Aly H F.Solvent extraction of V(Ⅴ)and Cr(Ⅲ)from acidic leach liquors of ilmenite using Aliquat 336[J].Transactions of Nonferrous Metals Society of China,2015,25(12):4183-4191.