Plasticizer-free and pH-independent ion-selective optode films based on a solvatochromic dye

2020 ◽  
Vol 12 (20) ◽  
pp. 2547-2550 ◽  
Author(s):  
Xuewei Wang ◽  
Yang Zhou ◽  
Vanessa Decker ◽  
Mark Meyerhoff ◽  
Meng Sun ◽  
...  
Keyword(s):  
Ion Exchanger ◽  
Nylon Membrane ◽  
Ion Sensing ◽  
Solvatochromic Dye

A layer of a solvatochromic dye, an ionophore, and an ion-exchanger deposited on a Nylon membrane enables highly selective colorimetric and fluorometric ion sensing.

Maize Stalk as Natural Ion Exchanger for Hazardous Pollutants

2017 ◽  
Vol 68 (8) ◽  
pp. 1726-1731
Author(s):  
Nicoleta Mirela Marin ◽  
Luoana Florentina Pascu ◽  
Ioana Stanculescu ◽  
Ovidiu Iordache ◽  
Denisa Jianu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Kinetic Models ◽  
High Selectivity ◽  
Ion Exchanger ◽  
Exchange Equilibrium ◽  
Waste Waters ◽  
Cationic Species ◽  
Hazardous Pollutants ◽  
Tailing Ponds

This paper recommends maize stalk as a cheap natural ion exchanger. Ion exchange equilibrium was studied using thermodynamic and kinetic models. The results showed a high selectivity towards cationic species of antimony (III), molybdenum (VI), lead (II) and arsenium (III). Waste waters and sediments from tailing ponds samples were analysed.

Multipurpose filters with ion-exchanger for the equalization of ammonia peaks

1995 ◽  
Vol 32 (7) ◽  
pp. 199-206 ◽  
Author(s):  
Martin Oldenburg ◽  
Ivan Sekoulov
Keyword(s):  
Operation Time ◽  
Ion Exchanger ◽  
Filter Medium ◽  
Nitrification Rate ◽  
Ion Exchangers ◽  
Flow Rates ◽  
Hydraulic Loading ◽  
Influent Concentration

In this study the use of zeolites as ion-exchangers for equalization of ammonia peak loadings in aerated biological activated filters was investigated. For this use zeolites were mixed with a filter medium and the nitrifying filter was loaded with ammonia peaks for two hours at different flow rates. It could be demonstrated that during the phase of higher inflow concentrations the zeolite was collecting ammonia. When the influent concentration decreased ammonia was desorbed from the zeolite and could be nitrified by the bacteria growing on the filter medium. It was shown that additional zeolites can equalize variations of ammonia, especially in filter units which are working at a high nitrification rate and which are very sensitive to varying influent conditions. During the operation time of the filter no separation of the zeolite by higher hydraulic loading or by backwashing could be recognized. So the upgrading of nitrifying filters with zeolite represents an additional security for effluents containing oscillating ammonia concentrations.

Ion selective picrate electrode with liquid membrane

1979 ◽  
Vol 44 (12) ◽  
pp. 3644-3648 ◽  
Author(s):  
Daniel Homolka
Keyword(s):  
Vinyl Chloride ◽  
Liquid Membrane ◽  
Ion Exchanger ◽  
Poly Vinyl Chloride ◽  
Chloride Matrix

An ion selective picrate electrode with a liquid membrane supported by a poly(vinyl chloride) matrix was proposed. Cetyltrimethylammonium cations in n-hexyl-o-nitrophenyl ether serve as an ion exchanger. The electrode is suitable for analytical purposes.

Sorption of Lead by the Selective Ion Exchanger Ostsorb DETA

1992 ◽  
Vol 57 (7) ◽  
pp. 1393-1404 ◽  
Author(s):  
Ladislav Svoboda ◽  
Jan Uhlíř ◽  
Zdeněk Uhlíř
Keyword(s):  
Phosphoric Acid ◽  
Aqueous Solutions ◽  
Functional Groups ◽  
Ion Exchanger ◽  
Preconcentration Procedure ◽  
Bead Cellulose

The properties of Ostsorb DETA, a selective ion exchanger based on modified bead cellulose with chemically bonded diethylenetriamine functional groups, were studied, and its applicability to the preconcentration of trace amounts of lead from aqueous solutions was verified. The conditions of the preconcentration procedure in the column and batch modes were optimized for this purpose. The results obtained were applied to the determination of lead in phosphoric acid.

One-step synthesis of PCL/Mg Janus micromotor for precious metal ion sensing, removal and recycling

2019 ◽  
Vol 54 (9) ◽  
pp. 7322-7332 ◽  
Author(s):  
Dongmei Zhang ◽  
Dan Wang ◽  
Jieai Li ◽  
Xiaoyi Xu ◽  
Hui Zhang ◽  
...  
Keyword(s):  
Precious Metal ◽  
Metal Ion ◽  
Ion Sensing ◽  
One Step ◽  
Metal Ion Sensing
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