COUPLING OF ION EXCHANGE WITH INDUSTRIAL PROCESSES. APPLICATION IN FERTILIZER PRODUCTION AND MODELING OF THE KEY ELUTION STEP

1997 ◽  
Vol 15 (1) ◽  
pp. 143-168 ◽  
Author(s):  
Manuel Rendueles ◽  
Aurora Fernández ◽  
Mario Díaz
Keyword(s):  
Ion Exchange ◽  
Industrial Processes ◽  
Fertilizer Production ◽  
Elution Step

Current Technology for Power Plant Makeup Water Treatment and Wastewater Recovery

2012 ◽  
Author(s):  
Brad Buecker
Keyword(s):  
Water Treatment ◽  
Power Plant ◽  
Ion Exchange ◽  
Reverse Osmosis ◽  
Cooling Tower ◽  
State Of The Art ◽  
Industrial Processes ◽  
Makeup Water ◽  
Water Pretreatment ◽  
The U.S

The availability of fresh water for power plant makeup and cooling continues to decline. In addition, environmental regulators are placing tighter limitations on the methods by which water is obtained and discharged for and from industrial processes. One example is the emerging restrictions on once-through cooling in the U.S. This paper examines state-of-the art technology for producing plant makeup water, and it also looks at techniques for recovering significant portions of wastewater streams such as cooling tower blowdown. Technologies that will be reviewed include makeup water pretreatment, reverse osmosis, ion exchange, electrodeionization, and high-pH reverse osmosis for wastewater recovery.

scholarly journals A Study of Osmosis Rate Through Several Proton Conducting Polymer Composite Membranes

2021 ◽  
Author(s):  
Reinis KAPARKALĒJS ◽  
Einārs SPRŪĢIS ◽  
Guntars VAIVARS
Keyword(s):  
Carbon Dioxide ◽  
Ion Exchange ◽  
Polymer Composite ◽  
Electrochemical Synthesis ◽  
Composite Membranes ◽  
Raw Material ◽  
Industrial Processes ◽  
Zro2 Content ◽  
Osmotic Permeability ◽  
Exchange Membrane

Carbon dioxide is typically considered to be a byproduct of various industrial processes that should not be released into the environment due to its nature as a harmful greenhouse gas. One of the more promising ways to dispose of it in an economical and environmentally friendly way is by using it as a raw material in electrochemical synthesis reactors. An important part of such reactors is an ion exchange membrane. In this study the influence of ZrO2 content in SPEEK – ZrO2 composite membranes on rate of osmosis trough them was investigated, with the goal of evaluating ZrO2 as an additive for making ion exchange membranes with fine-tuned osmotic permeability.

Embedding Procedure for Water Swollen Samples

1970 ◽  
Vol 28 ◽  
pp. 504-505
Author(s):  
Ann M. Thomas ◽  
Virginia Shemeley
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ion Exchange ◽  
Structural Changes ◽  
Cross Linking ◽  
Ion Exchange Resins ◽  
Transmission Electron ◽  
First Pass ◽  
Exchange Resins

Those samples which swell rapidly when exposed to water are, at best, difficult to section for transmission electron microscopy. Some materials literally burst out of the embedding block with the first pass by the knife, and even the most rapid cutting cycle produces sections of limited value. Many ion exchange resins swell in water; some undergo irreversible structural changes when dried. We developed our embedding procedure to handle this type of sample, but it should be applicable to many materials that present similar sectioning difficulties.The purpose of our embedding procedure is to build up a cross-linking network throughout the sample, while it is in a water swollen state. Our procedure was suggested to us by the work of Rosenberg, where he mentioned the formation of a tridimensional structure by the polymerization of the GMA biproduct, triglycol dimethacrylate.

SYNTHESIS AND MAGNETIC PROPERTIES OF PLATELET SHAPE SPINEL AND M-TYPE HEXAGONAL FERRITES PREPARED FROM β'' ALUMINA-LIKE FERRITES BY ION EXCHANGE

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-937-C8-938
Author(s):  
O. Kalogirou ◽  
A. C. Stergiou ◽  
D. Samaras ◽  
S. Nicolopoulos ◽  
A. Bekka ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ion Exchange ◽  
Hexagonal Ferrites ◽  
Platelet Shape
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