Modeling of nitrate removal for ion exchange resin in batch and fixed bed experiments

Desalination ◽  
2012 ◽  
Vol 284 ◽  
pp. 22-31 ◽  
Author(s):  
A.A. Hekmatzadeh ◽  
A. Karimi-Jashani ◽  
N. Talebbeydokhti ◽  
B. Kløve
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Nitrate Removal ◽  
Fixed Bed ◽  
Ion Exchange Resin

scholarly journals Development of a Combined Leaching and Ion-Exchange System for Valorisation of Spent Potlining Waste

2020 ◽  
Vol 11 (10) ◽  
pp. 5467-5481 ◽  
Author(s):  
Thomas J. Robshaw ◽  
Keith Bonser ◽  
Glyn Coxhill ◽  
Robert Dawson ◽  
Mark D. Ogden
Keyword(s):  
Ion Exchange ◽  
Solid Waste ◽  
Exchange Resin ◽  
Waste Product ◽  
Fixed Bed ◽  
Ion Exchange Resin ◽  
Exchange System ◽  
Fixed Bed Column ◽  
Chemical Leaching ◽  
Global Challenge

Abstract This work aims to contribute to addressing the global challenge of recycling and valorising spent potlining; a hazardous solid waste product of the aluminium smelting industry. This has been achieved using a simple two-step chemical leaching treatment of the waste, using dilute lixiviants, namely NaOH, H2O2 and H2SO4, and at ambient temperature. The potlining and resulting leachate were characterised by spectroscopy and microscopy to determine the success of the treatment, as well as the morphology and mineralogy of the solid waste. This confirmed that the potlining samples were a mixture of contaminated graphite and refractory materials, with high variability of composition. A large quantity of fluoride was solublised by the leaching process, as well as numerous metals, some of them toxic. The acidic and caustic leachates were combined and the aluminium and fluoride components were selectively extracted, using a modified ion-exchange resin, in fixed-bed column experiments. The resin performed above expectations, based on previous studies, which used a simulant feed, extracting fluoride efficiently from leachates of significantly different compositions. Finally, the fluoride and aluminium were coeluted from the column, using NaOH as the eluent, creating an enriched aqueous stream, relatively free from contaminants, from which recovery of synthetic cryolite can be attempted. Overall, the study accomplished several steps in the development of a fully-realised spent potlining treatment system. Graphic Abstract

scholarly journals Pilot Plant Fixed-Bed Ion-Exchange Resin System for Removing Iodine-131 and Radiostrontium from Milk

1967 ◽  
Vol 50 (8) ◽  
pp. 1221-1225 ◽  
Author(s):  
H.E. Walter ◽  
A.M. Sadler ◽  
D.G. Easterly ◽  
L.F. Edmondson
Keyword(s):  
Ion Exchange ◽  
Pilot Plant ◽  
Exchange Resin ◽  
Fixed Bed ◽  
Ion Exchange Resin ◽  
Resin System ◽  
Iodine 131

Binary Adsorption in a Fixed-Bed Column Packed with an Ion-Exchange Resin

1995 ◽  
Vol 30 (13) ◽  
pp. 2731-2746 ◽  
Author(s):  
Run-Tun Huang ◽  
Teh-Liang Chen ◽  
Hung-Shan Weng
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Fixed Bed ◽  
Ion Exchange Resin ◽  
Binary Adsorption ◽  
Fixed Bed Column

Ciprofloxacin desorption from gel type ion exchange resin: Desorption modeling in batch system and fixed bed column

2020 ◽  
Vol 230 ◽  
pp. 115857 ◽  
Author(s):  
Júnior Staudt ◽  
Fabiano Bisinella Scheufele ◽  
Caroline Ribeiro ◽  
Thiago Yudi Sato ◽  
Rafael Canevesi ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Fixed Bed ◽  
Ion Exchange Resin ◽  
Fixed Bed Column ◽  
Batch System
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