TITLE:
Effect of the Number of Donor Atoms in Calix[4]arene Derivatives for Selective Complexation and Extraction of Mercury(II) Cations, Thermodynamics and Extraction Studies
AUTHORS:
Walther B. Aparicio-Aragon, Tania Deza Ramos, Angela F. Danil de Namor
KEYWORDS:
Pollutant, Calixarene, Mercury, Selectivity, Donor Atoms
JOURNAL NAME:
Advances in Chemical Engineering and Science,
Vol.11 No.2,
April
14,
2021
ABSTRACT: Water pollution due to gold
mining activity is increasingly worrying. One way to selectively mitigate it is
through the use of complexing agents such as calixarenes, which selectively
functionalized with soft donor atoms such as sulphur,
can selectively remove this pollutant, for the selective complexation of
mercury from contaminated water, which was compared by conductimetry and liquid-liquid
extraction studies with results that show that the derivative with the highest sulphur atoms is its structure which presents greater selectivity compared to the
derivative with the lowest number of sulphur atoms, in both cases, they present very stable complexes.