Ensuring Arsenic Compliance   Water & Wastes Digest August 2006   Peter J. Keenan
Planning and evaluation help drinking water utilities comply with the EPA’s Arsenic Rule

Ion Exchange Resins and Processes for Industrial Water Treatment   Water Quality Products July 2003   Wayne E. Bernahl, W. Bernahl Enterprises, Ltd.
Let's take a closer look at the technology and operation of ion exchange resins and processes used today in industrial water treatment systems.

Nitrate Removal by Ion Exchange   Water Quality Products April 2003   Francis J. DeSilva, ResinTech, Inc.
Nitrates have no detectable color, taste or smell at the concentrations involved in drinking water supplies, and they do not cause discoloration of plumbing fixtures, so they remain undetectable to our senses. Nitrate removal processes must be either foolproof or include extensive monitoring of the treated water to detect breakthrough or determine the need for regeneration.
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Arsenic Treatment Options for the Southwest   Water Quality Products February 2003   Arizona Water Quality Association
While high concentrations of arsenic are found mostly in the Western region of the United States, parts of the Midwest and New England show levels of arsenic that exceed the newly approved U.S. Environmental Protection Agency (EPA) standard of 10 parts per billion (ppb). Individuals not willing to wait for their water system's compliance with the arsenic standard currently are looking for treatment systems to use in their homes. POU and even point-of-entry (POE) treatment systems are an attractive solution for these individuals. The process should begin with a basic understanding of arsenic contamination and the element's chemistry, a complete water quality analysis of the application-specific water and the knowledge of available technologies.
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Good Housekeeping in the Portable Exchange Regeneration Plant   Water Quality Products April 2002   Frank DeSilva, ResinTech, Inc.DeSilva, ResinTech, Inc
As a portable exchange business grows, new accounts may include users of ultrapure water. (Ultrapure water generally refers to water with a resistivity greater than 15 megohm.) These users may require documentation and procedures that the dealer may not be accustomed to providing. This article will describe some of the requirements that many high tech customers may ask their supplier of ultrapure water to provide.
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Controlling Mechanisms of Contaminant Ion Leakage in Condensate Polishing Systems   Water Quality Products September 2001   Stephen W. Najmy, The Dow Chemical Co.
Extracting the maximum benefit from condensate polishing systems continues to be a top priority among many electric utility plants. With cost reduction pressures and increasing water quality standards, owners and operators continue to evaluate the resin handling procedures that affect corrosion product transport and contaminant ion impurity levels.
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Oxidizing Arsenic III to Arsenic V for Better Removal   Water Quality Products March 2001   Dr. Dennis Clifford and Ganesh Ghurye, University of Houston
On June 22, 2000, the U.S. Environmental Protection Agency (EPA) proposed lowering the maximum contaminant level (MCL) for arsenic from 50 down to 5 micrograms/L (Federal Register, 2000).
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Water Softening   Water Quality Products January 2001   Nancy Lucas, Cargill Salt
Among the many challenges water softening dealers face, one of most difficult can be the presence of iron in a customer’s water supply, particularly in areas where iron content is high. Iron can be a challenge to identify, let alone to recommend an effective and efficient treatment.

Nuclear Power Plants Crosslinked Resin Ion Exchange System Provdes the Right Reactor Water Chemistry   Water Quality Products July 2000   James Stahlbush and Stephen Najmy
In the nuclear power industry, finding an ion exchange system that provides the right feedwater and reactor water chemistry is a delicate balancing act. That?s why engineers at Niagara Mohawk?s Nine Mile Nuclear Power Station?Unit Two, a boiling water reactor with deep-bed condensate polishers in central New York, turned to The Dow Chemical Co. for help in meeting stringent industry guidelines for feedwater iron.

Just the Facts: Knowing Strong Base Anion Resin Types   Water Quality Products June 2000   Carl J. Galletti
Deciding which type of strong base anion (SBA) resin to use in a deioinizing application does not have to be a guessing game. The following article reviews chemical property differences that exist in SBA resin and how these differences affect resin performance.

Continuous Electrodeionization: The Chemical-Free Way to Produce High-Purity Water   Water Quality Products April 1999   by Trude Witham
The cost of chemical regeneration and waste neutralization rises, industries search for alternatives.

Metals Removal with Ion Exchange Resins   Water Quality Products October 1996   Carl Galletti
Many impurities in water and other liquids exist as dissolved ionic species that can be removed by ion exchange processes