康建壮, 钟学明, 曾鸿泽, 吴诗婷. P204-N235复合萃取剂对水中钴、镍、镁离子的萃取效果研究[J]. 南昌航空大学学报(自然科学版), 2016, 30(4): 64-69. DOI: 10.3969/j.issn.1001-4926.2016.04.011
引用本文: 康建壮, 钟学明, 曾鸿泽, 吴诗婷. P204-N235复合萃取剂对水中钴、镍、镁离子的萃取效果研究[J]. 南昌航空大学学报(自然科学版), 2016, 30(4): 64-69. DOI: 10.3969/j.issn.1001-4926.2016.04.011
KANG Jian-zhuang, ZHANG Xue-ming, ZENG Hong-ze, WU Shi-ting. Extraction Effect of Cobalt、Nickel and Magnesium from Water by Complex Extractant P204-N235[J]. Journal of nanchang hangkong university(Natural science edition), 2016, 30(4): 64-69. DOI: 10.3969/j.issn.1001-4926.2016.04.011
Citation: KANG Jian-zhuang, ZHANG Xue-ming, ZENG Hong-ze, WU Shi-ting. Extraction Effect of Cobalt、Nickel and Magnesium from Water by Complex Extractant P204-N235[J]. Journal of nanchang hangkong university(Natural science edition), 2016, 30(4): 64-69. DOI: 10.3969/j.issn.1001-4926.2016.04.011

P204-N235复合萃取剂对水中钴、镍、镁离子的萃取效果研究

Extraction Effect of Cobalt、Nickel and Magnesium from Water by Complex Extractant P204-N235

  • 摘要: 利用P204-N235复合萃取剂萃取Co、Ni、Mg,探讨了复合萃取剂对Co、Ni、Mg的最佳萃取条件。实验结果显示,随着P204的浓度、振荡时间和初始水相pH的增大,Co、Ni、Mg的萃取率一直增大,最佳萃取条件为20%的P204体积浓度,振荡10 min,初始水相pH为5。在相同的萃取条件下,复合萃取剂对Co、Ni、Mg的萃取效果比单独的P204要更好。通过作log D-logP204的谱图,拟合得出斜率均为3,由此推断出复合萃取剂萃取Co、Ni、Mg的萃合物组成为CoA2(HA)、NiA2(HA)、MgA2(HA)。作log D-pH的谱图得出斜率均为2,推出复合萃取剂萃取金属离子的机理为阳离子交换反应。

     

    Abstract: The optimal extraction conditions for the extraction of cobalt, nickel and magnesium were studied by using P204 and N235 composite extractant. The experimental results demonstrated that all of the metals extraction efficiencies increased with the increase of the concentration of P204, oscillation time and the initial pH value of aqueous phase. Taking into consideration various factors, the optimum extraction conditions are chosen to be 20% volume concentration of P204, 10 min of vibration time and initial pH value of 5. The compound extraction agents have higher efficiencies for extraction of cobalt, nickel and magnesium than that of pure P204 under the same extraction condition. Based on the log D-logP204 spectra, all of the slopes were 3, suggesting that the final products of cobalt, nickel and magnesium after extracted by composite extractant are CoA2(HA), NiA2(HA) and MgA2(HA), respectively. All of the slopes of logD-pH spectra were calculated to be 2, implying that the metals ions extraction mechanism by using compound extraction agents is the cation exchange reaction.

     

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