TY - JOUR
T1 - Selective removal of sodium from alkali-metal solutions with tetraoctylammonium monensin
AU - Parmentier, D.
AU - Lavenas, M.
AU - Güler, E.
AU - Metz, S.J.
AU - Kroon, M.C.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - Accumulation of sodium ions in fresh water limits its use for drinking water. In the greenhouse industry reuse of irrigation water, which still contains valuable nutrients is limited due to an increasing sodium concentration, and next to this high concentrations of sodium also result in corrosion problems. Existing technologies are not yet able to selectively remove sodium to solve above mentioned problems. Therefore, it was tried to develop a novel sodium selective ionic liquid based on the monensin anion combined with the tetraoctylammonium cation. Ionic crystals were obtained instead of an ionic liquid. Nevertheless, it was proven that these crystals could selectively remove sodium. Metal extraction experiments of an aqueous solution containing Li, Na, K, Mg and Ca with the monensin ionic crystals dissolved in toluene showed a selective single stage extraction efficiency of 41 wt% for sodium, while the extraction of the other salts was negligible. Regeneration is possible by applying an acidic solution, however this also prevents its reuse.
AB - Accumulation of sodium ions in fresh water limits its use for drinking water. In the greenhouse industry reuse of irrigation water, which still contains valuable nutrients is limited due to an increasing sodium concentration, and next to this high concentrations of sodium also result in corrosion problems. Existing technologies are not yet able to selectively remove sodium to solve above mentioned problems. Therefore, it was tried to develop a novel sodium selective ionic liquid based on the monensin anion combined with the tetraoctylammonium cation. Ionic crystals were obtained instead of an ionic liquid. Nevertheless, it was proven that these crystals could selectively remove sodium. Metal extraction experiments of an aqueous solution containing Li, Na, K, Mg and Ca with the monensin ionic crystals dissolved in toluene showed a selective single stage extraction efficiency of 41 wt% for sodium, while the extraction of the other salts was negligible. Regeneration is possible by applying an acidic solution, however this also prevents its reuse.
KW - Ionic crystals
KW - Ionic liquids
KW - Selective sodium extraction
KW - Sodium monensin
KW - Tetraoctylammonium monensin
UR - http://www.scopus.com/inward/record.url?scp=84984824799&partnerID=8YFLogxK
U2 - 10.1016/j.desal.2016.08.018
DO - 10.1016/j.desal.2016.08.018
M3 - Article
AN - SCOPUS:84984824799
SN - 0011-9164
VL - 399
SP - 124
EP - 127
JO - Desalination
JF - Desalination
ER -