Water Conditioning & Purification Magazine

Iron Removal by Softening Resins

By Peter Meyers There are many rules of thumb and general opinions about iron removal by softeners. Some dealers claim excellent removal, others are skeptical and one on-line advertisement claims that regeneration with soft water […]

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An Introduction to Arsenic Adsorbents

By Peter Meyers Introduction As a general class, the arsenic adsorbents are all based on similar adsorbent chemistry. An insoluble metal oxide/hydroxide is the adsorbent, which is contained in some type of granular substrate that […]

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Behavior of Silica: Technologies Available & How They R...

By Peter Meyers Summary: 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 further studies, though, some technologies […]

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A History of Softening

By Peter Meyers Summary: 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 […]

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Waterborne Contaminants: Emerging Issues—Copper, Chloramin...

By Dick Chmielewski and Peter Meyers Summary: 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 the general use […]

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Countercurrent Regeneration of Softeners: Weighing the Pros ...

By Peter Meyers Summary: Countercurrent regeneration is a method that has tried unsuccessfully to get into the mainstream of the water softening industry. Despite various application strategies, it’s often dismissed as too complex and with […]

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Water Softening—Part 2 of 2: The Fundamental Theory

By Peter Meyers Summary: In Part 1, we discussed aspects of ion selectivity as they relate to water softening, including selectivity coefficients, apparent selectivity and selectivity reversal. In Part 2, we take up the mathematical […]

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Water Softening—Part 1 of 2: The Fundamental Theory

By Peter Meyers Summary: 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. And, unlike most […]

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Ion Exchange: Niche Markets for the Common Water Softener

By Peter Meyers Summary: 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 […]

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Ion Exchange and Leachables—A Fresh Look

By Peter Meyers Summary: Significant discussion has taken place recently regarding leachables and materials safety of water treatment equipment. As it relates to softeners, solvent resins—which can impart contaminants into water in the short term […]

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