Highly selective membrane transport of lead(2+) ion from aqueous metal ion mixtures using macrocyclic carriers

1980 ◽  
Vol 102 (7) ◽  
pp. 2452-2454 ◽  
Author(s):  
J. D. Lamb ◽  
R. M. Izatt ◽  
P. A. Robertson ◽  
J. J. Christensen
Keyword(s):  
Membrane Transport ◽  
Metal Ion ◽  
Selective Membrane

scholarly journals Liquid-liquid extraction and facilitated membrane transport of Pb2+ using a lipophilic acridono-crown ether as carrier

2020 ◽  
Vol 99 (1-2) ◽  
pp. 117-129
Author(s):  
Ádám Golcs ◽  
László Bezúr ◽  
Péter Huszthy ◽  
Tünde Tóth
Keyword(s):  
Membrane Transport ◽  
Metal Ion ◽  
Liquid Membrane ◽  
Competitive Inhibition ◽  
Liquid Extraction ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane ◽  
Liquid Liquid Extraction ◽  
Component Systems ◽  
Source Phase

AbstractStudies on liquid-liquid extraction and bulk liquid membrane (BLM) technique-based metal ion separation by a previously published Pb2+-selective acridono-18-crown-6 ether selector molecule were performed. The effects of the stirring speed, the quality of apolar organic membrane, the counterions of Pb2+, the pH of the aqueous phase, the concentration of the source phase, the concentration of the carrier in the BLM and the temperature on the Pb2+-separation were investigated. Moreover, the effects of the competitive inhibition due to the presence of Ag+, Ca2+, Co2+, Cu2+, K+, Mg2+, Na+ and Zn2+ as competing ions in a multicomponent aqueous source phase of different ion-concentrations were also studied. After a proper dilution of the multicomponent aqueous source phase, excellent Pb2+-selectivity was achieved without a significant reduction in the efficiency compared to the liquid membrane transport of single-component systems. Based on the BLM-cell studies the applied selector molecule proved to be suitable for the development of liquid membrane-based Pb2+-selective separation methods, which can be greatly aided by the analysis of the effects on the separation and by the optimization of the parameters of the process discussed here.

Development of a Graphene Paper-Based Flexible Solid-Contact Lead Ion-Selective Electrode and its Application in Water

2019 ◽  
Vol 62 (2) ◽  
pp. 245-252 ◽  
Author(s):  
Yao Yao ◽  
Yibin Ying ◽  
Jianfeng Ping
Keyword(s):  
Metal Ion ◽  
Water Layer ◽  
Potentiometric Sensor ◽  
Ion Selective Electrode ◽  
Lead Ion ◽  
Solid Contact ◽  
Selective Electrode ◽  
Filtration Method ◽  
Selective Membrane ◽  
Graphene Paper

Abstract. A graphene paper-based flexible solid-contact ion-selective electrode (SC-ISE) was developed to detect lead ion sensitively. Graphene paper obtained via a simple vacuum filtration method was used as the electrode substrate for direct coating of an ion-selective membrane. The Nernstian slope of the prepared paper-based potentiometric sensor toward lead ion detection was demonstrated as 29.4 mV per decade. A detection limit as low as 2.5 × 10-7 mol L-1 was achieved. Reversed chronopotentiometry and water layer test revealed that the graphene paper-based SC-ISE possessed excellent potential stability because of the hydrophobicity of graphene paper. Furthermore, reliable data were obtained from the detection of lead ion levels in real water samples using the graphene paper-based potentiometric sensor, which shows great potential in practical application. Keywords: Graphene paper, Heavy metal, Ion-selective electrode, Potentiometry, Water sample.

Selective membrane transport of dicarboxylic acids in their neutral form by a synthetic receptor containing amidopyridine groups

1997 ◽  
Vol 343 (3) ◽  
pp. 287-294 ◽  
Author(s):  
Cristina Palet ◽  
Maria Muñoz ◽  
Manuel Valiente ◽  
Tadeusz Cynkowski ◽  
Sylvia Daunert ◽  
...  
Keyword(s):  
Membrane Transport ◽  
Dicarboxylic Acids ◽  
Neutral Form ◽  
Synthetic Receptor ◽  
Selective Membrane
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