TY - JOUR
T1 - Host-Guest Extraction of Heavy Metal Ions with p - T -Butylcalix[8]arene from Ammonia or Amine Solutions
AU - Zahir, Md Hasan
AU - Chowdhury, Shakhawat
AU - Abdul Aziz, Md
AU - Rahman, Mohammad Mizanur
N1 - Publisher Copyright:
© 2018 Md. Hasan Zahir et al.
PY - 2018
Y1 - 2018
N2 - The capacities of the p-t-butylcalix[8]arene (abbreviated as H8L) 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 Cd2+> Ni2+> Cu2+> Ag+> Co2+> Zn2+. When the aqueous phase contained ethylene diamine, excellent extraction efficiencies of 97% and 90% were observed for the heavy metal ions Cu2+ and Cd2+, respectively. Under the same conditions the extraction of octahedral type metal ions, namely, Co2+ and Ni2+, was suppressed. The extraction of transition metal cations by H8L 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.
AB - The capacities of the p-t-butylcalix[8]arene (abbreviated as H8L) 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 Cd2+> Ni2+> Cu2+> Ag+> Co2+> Zn2+. When the aqueous phase contained ethylene diamine, excellent extraction efficiencies of 97% and 90% were observed for the heavy metal ions Cu2+ and Cd2+, respectively. Under the same conditions the extraction of octahedral type metal ions, namely, Co2+ and Ni2+, was suppressed. The extraction of transition metal cations by H8L 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.
UR - http://www.scopus.com/inward/record.url?scp=85050801968&partnerID=8YFLogxK
U2 - 10.1155/2018/4015878
DO - 10.1155/2018/4015878
M3 - Article
AN - SCOPUS:85050801968
SN - 1687-8760
VL - 2018
JO - International Journal of Analytical Chemistry
JF - International Journal of Analytical Chemistry
M1 - 4015878
ER -