Premium
Extraction equilibria of lead(II) from nitrate solutions with acidic organophosphorus compounds
Author(s) -
Juang RueyShin,
Lee ShwuHwa
Publication year - 1994
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280600110
Subject(s) - toluene , analytical chemistry (journal) , phosphoric acid , chemistry , extraction (chemistry) , physics , crystallography , chromatography , organic chemistry
The distribution data were numerically analyzed for the extraction of trace lead(II) from 1·0 mol dm −3 (Li,H)NO 3 media with toluene solutions of acidic organophosphorus compounds (HR), including di(2‐ethylhexyl)phosphoric acid (D2EHPA) and 2‐ethylhexylphosphonic acid mono‐2‐ethylhexyl ester (HEHEHP). The complex formulations were determined to be \documentclass{article}\pagestyle{empty}\begin{document}$ \overline {{\rm PbR}_2 {\rm (HR)}},{\rm }\overline {{\rm PbR}_2 {\rm (HR)}_4 },{\rm and }\overline {{\rm Pb(NO}_3 {\rm )R}} $\end{document} for the D2EHPA system and to be \documentclass{article}\pagestyle{empty}\begin{document}$ \overline {{\rm PbR}_2 {\rm (HR)}_{\rm 3} },{\rm }\overline {{\rm PbR}_2 {\rm (HR)}_4 },{\rm and }\overline {{\rm Pb(NO}_3 {\rm )R(HR)}} $\end{document} for the HEHEHP system. In this work, the equilibrium constants for the formation of these complexes were also given at 298 K.