Product Documentation

How to selectively remove heavy metals from water.

Chelating resins are gaining acceptance as the best available technology for the removal of transition and heavy metal cations from ground water and from plating rinse waters. These specialty ion exchange resins are capable of removing metals selectively in the presence of other ions such as calcium, magnesium and sodium. This paper describes the various types of chelating resins that are commercially available, discusses the conditions under which they will and will not work, and explores the input require-ments necessary to optimize a system design.

How to interpret and understand the results of an ion exchange resin analysis. When is it time to replace or clean resin?

Using performance prediction software to forecast ion exchange resin performance. Simulation technology with its ion exchange (IX) application can provide additional advantages validated by number of simulated pilot plant studies covering hundreds of cycles of exhaustion and regeneration. The advanced simulation technology is known to combine mass action and kinetic relationships to simulate exhaustion and calculating profile for each ion in each portion of the water and the resin bed as the water. The behavior of all contaminants can be modeled by simulation technology by comparing the peak and average leakage levels with Maximum Contaminants List (MCL) guidelines. The initially performed simulations exhibited the effluent profiles for the virgin cycle of operation by employing a nitrate selective resin with an aim to prevent the chromatographic dumping of nitrates by sulfates. Simulation technology can also replace physical pilot plant studies providing data in minutes that can further stimulate concurrent, countercurrent and homogenized bed regeneration techniques for the desired number of cycles.

AWT: The Analyst

AWT: The Analyst

AWT: The Analyst

AWT: The Analyst

AWT: The Analyst

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

How ion exchange resins can be used to selectively remove emerging contaminants from groundwater.

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.

Frank Desilva responds to Water Technology readers’ questions.

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

This presentation is a general overview of the types of iron in water and what to do to remove them. This is a general presentation.

The removal of insoluble ferric iron by water softeners can be problematic. Softening resins filter to approximately two microns in size but ferric iron particles are often smaller than one micron.Depending on particle size, flowrate and resin size and uniformity, removal can be as little as 10 percent or as much as 90 percent with 25- to 75-percent removal more typical. Fine-mesh resins do better than larger resins.

Removal of lead from water.

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

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

Methods of producing ultrapure POU water for laboratory use.

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

A little of this and a little of that may work in spicing a pot of stew, but when it comes to ion exchange float, you’d better know all the considerations in choosing new resin to add. More often than not, it’s a like-to-like equation. Here, such issues are discussed in detail for the dealer, who may also do commercial/light industrial work.

The removal of molybdenum from cooling loops using ion exchange resin.