Iron in Your Water Supply

Iron is one of the most troubling contaminants we deal with in traditional water treatment. It can be simple to deal with or very complex.

About The Author: 

Edward T. Maas is a product application engineer for Hellenbrand, Inc. He has been in the water industry for 32 years and employed by Hellenbrand for the past 13 years. Hellenbrand, Inc. is a manufacturer of water treatment equipment and provides the industry with a wide array of water treatment products including the patented chemical-free Iron Curtain filter system for residential and commercial applications.

Activation Date: 
June 1, 2004
Files: 
Issue Reference: 
Legacy
Legacy ID: 
15206

Ion Exchange Resins and Processes for Industrial Water Treatment

Let's take a closer look at the technology and operation of ion exchange resins and processes used today in industrial water treatment systems.

About The Author: 

Wayne Bernahl is president of W. Bernahl Enterprises, Ltd. He has worked in the industrial water treatment marketplace for 37 years. Most of this time was in technical marketing and consulting positions dealing with ion exchange and reverse osmosis applications.

Activation Date: 
June 27, 2003
Issue Reference: 
Legacy
Legacy ID: 
14224

Nitrate Removal by Ion Exchange

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.

Activation Date: 
March 27, 2003
Files: 
Legacy
Legacy ID: 
13906

Arsenic Treatment Options for the Southwest

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.

Activation Date: 
January 31, 2003
Files: 
Issue Reference: 
Legacy
Legacy ID: 
13655

Controlling Mechanisms of Contaminant Ion Leakage in Condensate Polishing Systems

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.

About The Author: 

Stephen W. Najmy is a project manager for The Dow Chemical Co. He has worked in the technical service and development department for Dow Liquid Separations for the past 10 years. Much of his job focuses on the development of new resin products and procedures for condensate polishing systems. He is based at Larkin Laboratory in Midland, Mich.

Activation Date: 
September 11, 2001
Files: 
Issue Reference: 
Legacy
Legacy ID: 
12618

Oxidizing Arsenic III to Arsenic V for Better Removal

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).

About The Author: 

Dr. Dennis Clifford, P.E., is a professor of environmental engineering and chair of the Department of Civil and Environmental Engineering at the University of Houston. He has more than 30 years experience in teaching, research and consulting related to water and soil treatment. During the last 20 years, he and his students have extensively researched the subject of arsenic speciation, oxidation and treatment.

Ganesh Ghurye received his master’s degree in environmental engineering from the University of Houston, where he currently is a researcher in the area of water treatment. He has five years experience in developing arsenic treatment methods.

Activation Date: 
March 14, 2001
Files: 
Issue Reference: 
Legacy
Legacy ID: 
12210

Just the Facts: Knowing Strong Base Anion Resin Types

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.Deciding which type of strong base anion (SBA) resin to use in a deioinizing application does not have to be a guessing game. In fact, selecting the correct SBA resin for your application can be simple as long as you know the facts about the resin and the circumstances in which they will be employed.

About The Author: 

Carl J. Galletti is the Midwest technical sales manager for ResinTech, a supplier of ion exchange resins and granulated activated carbon. He has worked within the chemical separation technology field for eleven years while at DuPont’s Biotechnology Division and ResinTech. Since joining ResinTech in 1992, Mr. Galletti has written articles on ion exchange and granulated activated carbon applications.

Publication Date: 
December 28, 2000
Activation Date: 
December 28, 2000
Legacy
Legacy ID: 
11711

Continuous Electrodeionization: The Chemical-Free Way to Produce High-Purity Water

The cost of chemical regeneration and waste neutralization rises, industries search for alternatives.

Activation Date: 
December 28, 2000
Issue Reference: 
Legacy
Legacy ID: 
11345