Zahir Md Hasan, Chowdhury Shakhawat, Abdul Aziz Md, Rahman Mohammad Mizanur
Center of Research Excellence in Renewable Energy, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Department of Civil and Environmental Engineering, Water Research Group, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Int J Anal Chem. 2018 Jul 11;2018:4015878. doi: 10.1155/2018/4015878. eCollection 2018.
The capacities of the --butylcalix[8]arene (abbreviated as HL) host to extract toxic divalent heavy metal ions and silver from aqueous solution phases containing ammonia or ethylene diamine to an organic phase (nitrobenzene, dichloromethane, or chloroform) were carried out. When the metal ions were extracted from an aqueous ammonia solution, the metal ion selectivity for extraction was found to decrease in the order Cd> Ni> Cu> Ag> Co> Zn. When the aqueous phase contained ethylene diamine, excellent extraction efficiencies of 97% and 90% were observed for the heavy metal ions Cu and Cd, respectively. Under the same conditions the extraction of octahedral type metal ions, namely, Co and Ni, was suppressed. The extraction of transition metal cations by HL in ammonia and/or amine was found to be pH dependent. Detailed analysis of extraction behavior was investigated by slope analysis, the continuous variation method, and by loading tests.
研究了对叔丁基杯[8]芳烃（简称为HL）主体从含有氨或乙二胺的水相中将有毒二价重金属离子和银萃取到有机相（硝基苯、二氯甲烷或氯仿）中的能力。当从氨水溶液中萃取金属离子时，发现萃取的金属离子选择性按Cd>Ni>Cu>Ag>Co>Zn的顺序降低。当水相中含有乙二胺时，重金属离子Cu和Cd的萃取效率分别高达97%和90%。在相同条件下，八面体类型金属离子即Co和Ni的萃取受到抑制。发现HL在氨和/或胺中对过渡金属阳离子的萃取取决于pH值。通过斜率分析、连续变化法和负载试验对萃取行为进行了详细分析。
