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Ion Exchange Applications of Simulation Technology
Using performance prediction software to forecast ion exchange resin performance. Simulation technology with its ion exchange (IX) application can provide additional ... Read More.
Softener resin and chlorine limitations
Predicting resin life and the effects of chlorine and chloramine disinfection
Chromium Removal Using Selective Ion Exchange Resins
Techniques for removing hexavalent chromium. Presented at 2002 WQA.
Cleaning of Oil Fouled Softener Resins
Evaluation of cleaning efficacy of oil fouled cation softening resins. Presented at IWC in 1994.
Common Pitfalls of Ion Exchange for Organic Traps
Application advice for the use of anion resins to remove naturally occurring organic matter (NOM). Written by MG for Water Technology Magazine in 1999.
Factors in High Purity Mixed Bed Demineralizers
Ultrapure water production by the use of mixed bed ion exchange resin. Factors that influence ultimate quality are presented and discussed.
Guidelines for Anion Resin Replacement
When to replace anion exchange resin due to oxidation, fouling, or other reasons.
Heavy Metals Removal Using Ion Exchange
How to selectively remove heavy metals from water.
Interpretation of Resin Analysis
How to interpret and understand the results of an ion exchange resin analysis. When is it time to replace or clean resin?
Low TOC Mixed-Bed Resins
How to achieve low total organic carbon (TOC) levels in ultrapure water using mixed bed DI resins.
Molybdate Removal by Ion Exchange Resins
The removal of molybdenum from cooling loops using ion exchange resin. Written by Andrew Bishop, formerly of ResinTech.
Nitrate Selective Resins
A comparison between strong base anion resins for nitrate removal, both general resins and selective resins.
Operating Experiences with a New Organic Trap Resin
Removal of NOM using a specialty anion resin.
Optimizing PEDI with Rinse Recycle
How to save substantial amounts of rinse water in the regeneration plant.
Overnight Soaks Work Miracles in MIxed-Bed Regeneration for PEDI Service
Soaking a freshly regenerated mixed bed tank overnight in DI water before use can help achieve a higher purity effluent when put into service.
Potassium chloride as an alternate regenerant
The benefits of using potassium chloride versus sodium chloride as a brine regenerant.
Predicting the Operating Capacity of Strong Base Anion Resins from Static Laboratory Tests
How to predict the field operating capacity of strong base anion resins based on their current chemical condition as reported by the analytical laboratory.
Removing Organics with Anion Exchange Resin
The use of strong base anion resins operated in the chloride form for removal of natural organic material.
The Reversible Removal of Naturally Occurring Organics Using Sodium Chloride Regenerated Ion Exchange Resins
A study of the use of anion exchange resins for the removal of natural organics from water.
Selective Silica Removal
The use of specialty hybrid resins for the selective removal of silica from nuclear process water and radwaste.
Some Like it Hot, Some Like it Cold
The effects of temperature on ion exchange resin operations.
Supplying DI Water for the Aquarium Industry
The importance of deionized (DI) water for the aquarium market.
Mixed Bed Resin Stability in Semiconductor Applications
What conditions are best for storing semiconductor ultrapure resins before use to maintain integrity?
The Use of PEDI in the Power Industry
How the power generation industry uses portable exchange DI service to provide demineralized makeup water. Economics are discussed. Regional portable exchange deioniz ... Read More.
The Practical Aspects of Ion Exchange in the Service DI Industry (Part 1 and 2)
Considerations for the use of portable exchange DI service for providing demineralized water.
When Do Ion Compositions Shift?
How does the concentration of background ions affect the removal of contaminants from water using ion exchange? What changes can be expected in treated water?
Nitrate Removal by Ion Exchange
The use of anion exchange resin for removing nitrate from drinking water sources.
WHY SHOULDN'T WE REBED THIS ION EXCHANGE UNIT?
When approaching a rebed of an ion exchange unit it is important to determine if it is the best course of action, how you will remove the resi ... Read More.
Ion Exchange for Removal of Groundwater Contaminants
How ion exchange resins can be used to selectively remove emerging contaminants from groundwater.
Uranium Removal by Ion Exchange
The removal of uranium from water supplies using chloride form anion resins.
What Should Be Included In A Drinking Water Test
In the water treatment market, at some point, you are likely to have a client ask to have their water tested. The big question is: “Tested for what?” Depending on the client, the answer could be drastically different.
Guidelines for Cation Resin Replacement
How to obtain a resin sample for analysis. Guidelines for replacement of resin due to oxidation, fouling, or loss of capacity
Protecting your mixed bed DI water with a softener
Peter Meyers responds to WC&P readers' questions.
Uptake rate of tannic acid by strong-base gel-type anion resins
A series of experiments were conducted to determine the uptake rates of tannic acid by styrenic strong-base Type-1, anion ... Read More.
Choosing the perfect softening resin
How to choose the correct softening resin for your application. Among the choices are 8% crosslinked, 10% crosslinked, gel, macroporous, fine mesh, coarse mesh, uniform particle size, and solventless.
An overview of technologies useful for arsenic removal
Solutions for removing arsenic from water.
Protect the Resin
How to protect ion exchange resin from oxidation, fouling and loss during use.
Ion exchange’s impact on drinking water when removing nitrates
Frank Desilva responds to Water Technology readers' questions.
Removal of trace contaminants
The use of ion exchange resins for removal of trace contaminants such as uranium, radium, perchlorate, chromate, and arsenic.
The Use of Strong Base Anion Resins for Arsenic Removal
Strong base anion resins (SBA), operated in the chloride form, can remove many contaminants from drinking water. These contaminants ... Read More.
Arsenic Removal by Regenerable Anion Resin
How to remove arsenic from water using brine regenerable anion resin.
Benefiting from a Lead/Lag Configuration
Using two IX units for meeting drinking water limits.
Trace Contaminant Removal
NOTE: the author of this article is Kaitlyn Clark The ability to remove trace contaminants by ion exchange resins is influenced by the relationships between inlet water TDS and contaminant concentration .
Perchlorate Removal
The selective removal of perchlorate from groundwater using ion exchange.
Protecting Ion Exchange Resins from Suspended Solids
How to keep suspended solids from entering the ion exchange bed. How to properly backwash and clean a bed that may have become impacted by suspended solids accumulation.
Radium Removal
Removing radium from drinking water sources using conventional softening resins and also selective resin.
Resin Regeneration Fundamentals
The fundamentals of regenerating softeners and two bed deionizers
Ion-Exchange Primer
A guide to understanding the basic principles of ion exchange for the metal finishing industry.
Good Housekeeping in the Portable Exchange Regeneration Plant
Procedures and standards to incorporate in the operation of a portable exchange DI regeneration plant.
Fighting Forever Chemicals
The history of PFAS, measurement techniques and removal methods.
Chapter 14: Ion Exchange Applications in Water Treatment
Water Treatment Plant Design, Fifth Edition By American Society of Civil Engineers
Behavior of Silica in Ion Exchange Systems
Silica is poorly ionized at neutral pH and has limited solubility. Membrane and precipitation processes can be quite effective at elevated pH ... Read More.
Behavior of Silica in Ion Exchange and Other Systems
The chemistry of silica in water and the methods of its removal.
Ion Exchange Part 2: Tips on Moving Ion Exchange Resins from Place to Place
AWT: The Analyst
Got spots? Here are some solutions.
Hardness minerals, calcium and magnesium, as well as some other dissolved ions, will leave spots on rinsed surfaces if the water is allowed to dry. Here's how to prevent it from happening.
Chapter 12: Ion Exchange Applications in Water Treatment
Water Treatment Plant Design, Fourth Edition By American Society of Civil Engineers
How Chelating Resins Behave
Chelating resins are gaining acceptance as the best available technology for the removal of transition and heavy metal cations from ground water and from pla ... Read More.
Ion Exchange: Niche Markets for the Common Water Softener
There are many uses a water conditioner can be put to beyond simply softening water. Some require more care and expertise because of potential health risks if not handled properly. Following is an overview on this concept.
Using Media to Remove Fluorides from Drinking Water Sources
Discussion of various methods of fluoride removal from water sources.
FDA’s 510(k) Certification: New Rules for Portable Exchange Tank Regeneration
New rules released late last year from the Food and Drug Administration (FDA) on water purification for kidney ... Read More.
Iron Removal by Softening Resins
The removal of insoluble ferric iron by water softeners can be problematic. Softening resins filter to approximately two microns in size but ferric iron p ... Read More.
Water Softening—Part 1 of 2: The Fundamental Theory
Water softening is an inherently efficient process. This is true for the service cycle, where sodium ions on the resin are exchanged f ... Read More.
Water Softening—Part 2 of 2: The Fundamental Theory
In Part 1, we discussed aspects of ion selectivity as they relate to water softening, including selectivity coefficients, apparent sel ... Read More.
Softeners: Increasing Salt Efficiency— Regenerant Contact Time, Concentration & Other Factors
A recent spate of regulations in a number of states has served notice to resin suppliers that cu ... Read More.
The Issue of pH Adjustment in Acid Washed Carbons
Though its popularity as a water treatment alternative is increasing, activated carbon can have a substantial effect on pH. These “spik ... Read More.
Countercurrent Regeneration of Softeners: Weighing the Pros and Cons
Countercurrent regeneration is a method that has tried unsuccessfully to get into the mainstream of the water softeni ... Read More.
Waterborne Contaminants: Emerging Issues—Copper, Chloramines and Water Conditioners
Recently, a handful of portable exchange deionization (PEDI) operators in California were cited for exc ... Read More.
A History of Softening
The concept of water softening has been in use longer than many of us may have been led to believe. Here, the author gives a brief historical lesson as well as a look into the future on where he sees the industry headed.
Behavior of Silica: Technologies Available & How They Rate
Silica has always confounded water treatment dealers in how to handle it and greatly reduce the contaminant. As we discover more ... Read More.
An Introduction to Laboratory Water Purification
Scientists use deionized water in a variety of areas from glassware washing to DNA synthesis. To provide the proper deionization system, i ... Read More.
An Introduction to Arsenic Adsorbents
As a general class, the arsenic adsorbents are all based on similar adsorbent chemistry. An insoluble metal oxide/hydroxide is the adsorbent, which i ... Read More.
Making Sense of an Incomplete Water Analysis
How to balance a partial water analysis to make up for missing parameters.
Brine Regeneration Considerations in Water Softeners
Factors affecting the efficiency and performance of brine regenerated water softeners
Ion Exchange and Leachables
What compounds can leach from softener resins when exposed to chlorine or other oxidants?
Mixing Resins in Your Float: Can You? Should You? And What to Look Out For
A little of this and a little of that may work in spicing a pot of stew, but when it comes to ion exchange float, y ... Read More.
Methods of Producing Lab Water
Methods of producing ultrapure POU water for laboratory use.
Behavior of Silica in Ion Exchange Systems
Silica is poorly ionized at neutral pH and has limited solubility. Membrane and precipitation processes can be quite effective at elevated pH but are either ineffecti ... Read More.
Behavior of Silica: Technologies Available & How They Rate
Silica has always confounded water treatment dealers in how to handle it and greatly reduce the contaminant. As we discover more information about silica due to furth ... Read More.
Chapter 12: Ion Exchange Applications in Water Treatment
Water Treatment Plant Design, Fourth Edition By American Society of Civil Engineers
Chapter 14: Ion Exchange Applications in Water Treatment
Water Treatment Plant Design, Fifth Edition By American Society of Civil Engineers
Countercurrent Regeneration of Softeners: Weighing the Pros and Cons
Countercurrent regeneration is a method that has tried unsuccessfully to get into the mainstream of the water softening industry. Despite various application strategi ... Read More.
FDA’s 510(k) Certification: New Rules for Portable Exchange Tank Regeneration
New rules released late last year from the Food and Drug Administration (FDA) on water purification for kidney dialysis patients will have a big impact on portable ex ... Read More.
Got spots? Here are some solutions.
Hardness minerals, calcium and magnesium, as well as some other dissolved ions, will leave spots on rinsed surfaces if the water is allowed to dry. Here's how to prevent it from happening.
How Chelating Resins Behave
Chelating resins are gaining acceptance as the best available technology for the removal of transition and heavy metal cations from ground water and from plating rins ... Read More.
How Chelating Resins Behave
Chelating resins are gaining acceptance as the best available technology for the removal of transition and heavy metal cations from ground water and from plating rins ... Read More.
Ion Exchange Part 2: Tips on Moving Ion Exchange Resins from Place to Place
AWT: The Analyst
Ion Exchange: Niche Markets for the Common Water Softener
There are many uses a water conditioner can be put to beyond simply softening water. Some require more care and expertise because of potential health risks if not handled properly. Following is an overview on this concept.
Ion exchange’s impact on drinking water when removing nitrates
Frank Desilva responds to Water Technology readers' questions.
Protecting your mixed bed DI water with a softener
Peter Meyers responds to WC&P readers' questions.
Softeners: Increasing Salt Efficiency— Regenerant Contact Time, Concentration & Other Factors
A recent spate of regulations in a number of states has served notice to resin suppliers that current processes will need to be modified. A couple areas of concern ar ... Read More.
Uptake rate of tannic acid by strong-base gel-type anion resins
A series of experiments were conducted to determine the uptake rates of tannic acid by styrenic strong-base Type-1, anion-exchange resins with a wide variety of moist ... Read More.
Water Softening—Part 1 of 2: The Fundamental Theory
Water softening is an inherently efficient process. This is true for the service cycle, where sodium ions on the resin are exchanged for hardness ions in the water. A ... Read More.
Waterborne Contaminants: Emerging Issues—Copper, Chloramines and Water Conditioners
Recently, a handful of portable exchange deionization (PEDI) operators in California were cited for excessive discharges of copper. How and why could this happen when ... Read More.
What Should Be Included In A Drinking Water Test
In the water treatment market, at some point, you are likely to have a client ask to have their water tested. The big question is: “Tested for what?” Depending on the client, the answer could be drastically different.
Arsenic Removal by Regenerable Anion Resin
How to remove arsenic from water using brine regenerable anion resin.
Ion Exchange Applications of Simulation Technology
Using performance prediction software to forecast ion exchange resin performance.
Being selective with sulfate
Discusses the selection and use of anion resin for removal of contaminants from water and the influence of sulfate levels.
Benefiting from a Lead/Lag Configuration
Using two IX units for meeting drinking water limits.
Brine Regeneration Considerations in Water Softeners
Factors affecting the efficiency and performance of brine regenerated water softeners
The Issue of pH Adjustment in Acid-Washed Carbons
How to avoid or accommodate pH variances in granular activated carbon.
Cation Resin Color Can Make A Difference
Cation exchange resin is available in amber or dark colored beads. Which color is best for your application?
Softener resin and chlorine limitations
Predicting resin life and the effects of chlorine and chloramine disinfection
Superfund site cleanup of chromate-contaminated groundwater
Article describing the use of SIR-700-HP for removal of hexavalent chromate from contaminated groundwater at a Superfund site in Vancouver, WA.
Application note on Ion exchange resins for sugar decolorization - Parag Deval
Selection of Ion exchange resins for sugar decolorization as per the color of sugar syrup
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