March 24, 2021
Ion Exchange Applications of Simulation Technology

Using performance prediction software to forecast ion exchange resin performance. Simulation technology with its ion exchange (IXread more...

March 24, 2021
Softener resin and chlorine limitations

Predicting resin life and the effects of chlorine and chloramine disinfectionread more...

March 24, 2021
Chromium Removal Using Selective Ion Exchange Resins

Techniques for removing hexavalent chromium. Presented at 2002 WQA.read more...

March 24, 2021
Cleaning Biologically Fouled Resins

Cleaning Biologically Fouled Resinsread more...

March 24, 2021
Cleaning of Oil Fouled Softener Resins

Evaluation of cleaning efficacy of oil fouled cation softening resins. Presented at IWC in 1994.read more...

March 24, 2021
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.read more...

March 24, 2021
Essentials of Ion Exchange

Fundamentals of ion exchange technologyread more...

March 24, 2021
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.read more...

March 24, 2021
Guidelines for Anion Resin Replacement

When to replace anion exchange resin due to oxidation, fouling, or other reasons.read more...

March 24, 2021
Heavy Metals Removal Using Ion Exchange

How to selectively remove heavy metals from water.read more...

March 24, 2021
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?read more...

March 24, 2021
Lead Removal by Ion Exchange

Removal of lead from water.read more...

March 24, 2021
Low TOC Mixed-Bed Resins

How to achieve low total organic carbon (TOC) levels in ultrapure water using mixed bed DI resins.read more...

March 24, 2021
Molybdate Removal by Ion Exchange Resins

The removal of molybdenum from cooling loops using ion exchange resin. Written by Andrew Bishop, formerly of ResinTech.read more...

March 24, 2021
Nitrate Selective Resins

A comparison between strong base anion resins for nitrate removal, both general resins and selective resins.read more...

March 24, 2021
Operating Experiences with a New Organic Trap Resin

Removal of NOM using a specialty anion resin.read more...

March 24, 2021
Optimizing PEDI with Rinse Recycle

How to save substantial amounts of rinse water in the regeneration plant.read more...

March 24, 2021
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.read more...

March 24, 2021
Potassium chloride as an alternate regenerant

The benefits of using potassium chloride versus sodium chloride as a brine regenerant.read more...

March 24, 2021
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.read more...

March 24, 2021
Removing Organics with Anion Exchange Resin

The use of strong base anion resins operated in the chloride form for removal of natural organic material.read more...

March 24, 2021
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.read more...

March 24, 2021
Selective Silica Removal

The use of specialty hybrid resins for the selective removal of silica from nuclear process water and radwaste.read more...

March 24, 2021
Some Like it Hot, Some Like it Cold

The effects of temperature on ion exchange resin operations.read more...

March 24, 2021
Supplying DI Water for the Aquarium Industry

The importance of deionized (DI) water for the aquarium market.read more...

March 24, 2021
Mixed Bed Resin Stability in Semiconductor Applications

What conditions are best for storing semiconductor ultrapure resins before use to maintain integrity?read more...

March 24, 2021
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 porread more...

March 24, 2021
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.read more...

March 23, 2021
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?read more...

March 23, 2021
Uranium Removal by Ion Exchange

The removal of uranium from water supplies using chloride form anion resins.read more...

March 23, 2021
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.read more...

March 23, 2021
An overview of technologies useful for arsenic removal

Solutions for removing arsenic from water.read more...

March 23, 2021
Protect the Resin

How to protect ion exchange resin from oxidation, fouling and loss during use.read more...

March 23, 2021
Ion exchange's impact on drinking water when removing nitrates

Frank Desilva responds to Water Technology readers' questions.read more...

March 23, 2021
Removal of trace contaminants

The use of ion exchange resins for removal of trace contaminants such as uranium, radium, perchlorate, chromate, and arsenic.read more...

March 23, 2021
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 contamiread more...

March 23, 2021
Arsenic Removal by Regenerable Anion Resin

How to remove arsenic from water using brine regenerable anion resin.read more...

March 23, 2021
Benefiting from a Lead/Lag Configuration

Using two IX units for meeting drinking water limits.read more...

March 23, 2021
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 .read more...

March 23, 2021
Perchlorate Removal

The selective removal of perchlorate from groundwater using ion exchange.read more...

March 23, 2021
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.read more...

March 23, 2021
Radium Removal

Removing radium from drinking water sources using conventional softening resins and also selective resin.read more...

March 23, 2021
Resin Regeneration Fundamentals

The fundamentals of regenerating softeners and two bed deionizersread more...

March 23, 2021
Resin Regeneration - More than Meets the Eye

Resin regeneration fundamentals.read more...

March 23, 2021
Protecting your mixed bed DI water with a softener

Peter Meyers responds to WC&P readers' questions.read more...

March 23, 2021
Resin Sterilization

How to disinfect a bed of ion exchange resin.read more...

March 23, 2021
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,read more...

March 23, 2021
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.read more...

March 23, 2021
Fighting Forever Chemicals

The history of PFAS, measurement techniques and removal methods.read more...

March 23, 2021
Chapter 14: Ion Exchange Applications in Water Treatment

Water Treatment Plant Design, Fifth Edition By American Society of Civil Engineersread more...

March 23, 2021
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 elevateread more...

March 23, 2021
Behavior of Silica in Ion Exchange and Other Systems

The chemistry of silica in water and the methods of its removal.read more...

March 23, 2021
Chapter 12: Ion Exchange Applications in Water Treatment

Water Treatment Plant Design, Fourth Edition By American Society of Civil Engineersread more...

March 23, 2021
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 froread more...

March 23, 2021
Ion-Exchange Primer

A guide to understanding the basic principles of ion exchange for the metal finishing industry.read more...

March 23, 2021
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, apparenread more...

March 23, 2021
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 thread more...

March 23, 2021
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. Theseread more...

March 23, 2021
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 soread more...

March 23, 2021
Waterborne Contaminants: Emerging Issues—Copper Chloramines and Water Conditioners

Recently, a handful of portable exchange deionization (PEDI) operators in California were cited foread more...

March 23, 2021
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.read more...

March 23, 2021
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 discoverread more...

March 23, 2021
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 systread more...

March 23, 2021
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, whread more...

March 23, 2021
Making Sense of an Incomplete Water Analysis

How to balance a partial water analysis to make up for missing parameters.read more...

March 23, 2021
Brine Regeneration Considerations in Water Softeners

Factors affecting the efficiency and performance of brine regenerated water softenersread more...

March 23, 2021
Ion Exchange and Leachables

What compounds can leach from softener resins when exposed to chlorine or other oxidants?read more...

March 23, 2021
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 floread more...

March 23, 2021
Methods of Producing Lab Water

Methods of producing ultrapure POU water for laboratory use.read more...

March 23, 2021
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.read more...

March 23, 2021
Using Media to Remove Fluorides from Drinking Water Sources

Discussion of various methods of fluoride removal from water sources.read more...

March 23, 2021
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 kiread more...

March 23, 2021
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 iread more...

March 23, 2021
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 exchanread more...

March 22, 2021
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 elevatedread more...

March 22, 2021
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 moread more...

March 22, 2021
Chapter 12: Ion Exchange Applications in Water Treatment

Water Treatment Plant Design, Fourth Edition By American Society of Civil Engineersread more...

March 22, 2021
Chapter 14: Ion Exchange Applications in Water Treatment

Water Treatment Plant Design, Fifth Edition By American Society of Civil Engineersread more...

March 22, 2021
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 softread more...

March 21, 2021
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 kidnread more...

March 21, 2021
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 froread more...

March 18, 2021
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 fromread more...

March 18, 2021
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.read more...

March 18, 2021
Ion exchange's impact on drinking water when removing nitrates

Frank Desilva responds to Water Technology readers' questions.read more...

March 18, 2021
Protecting your mixed bed DI water with a softener

Peter Meyers responds to WC&P readers' questions.read more...

March 18, 2021
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 thatread more...