Resin Sterilization
Water Quality Products
March 2006
By Frank DeSilva
Effective methods for cleaning biologically fouled resin
Chromate
Water Quality Products
December 2005
Frank DeSilva
The Boomsnub site in the state of Washington was listed as a Superfund site in 1995. The site consists of two parcels of land, which previously contained two unrelated businesses that contributed separately to contamination of soil and groundwater.
Iron in Your Water Supply
Water Quality Products
June 2004
By Ed Maas, Hellenbrand, Inc.
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.
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Is Dealkalization by Ion Exchange
Right for You?
Water Quality Products
June 2004
By Wayne E. Bernahl, W. Bernahl Enterprises, Ltd.
Alkalinity can be a critical contaminant that must be removed and controlled to prevent scale and corrosion of critical industrial processes and to minimize total operating costs.
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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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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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