Ultrapure Water Articles on Environmental XPRT

Electrodeionization - Ultrapure water

Continuous Electrodeionization Process The continuous electrodeionization process (CEDI), is a system that uses ion exchange resins and electricity for the production of ultrapure deionized water without chemical processes and without production stops. SIMPEC uses modular systems for the electrodeionization processes. The CEDI modules are installed at the exit ...

Sep. 29, 2011

By SIMPEC S.r.l.

UltraPure water: systems for microelectronics

The burgeoning electronics industry Electronics are the heartbeat of the products and services of many industries – including aerospace, communications, entertainment, defence, and health – and, as a consequence, the global electronics market is valued at US$1 trillion worldwide. ...

Jun. 1, 2006

Ultrapure water – The standard for resistivity measurements of Ultrapure water - Case Study

Abstract For years, resistivity/conductivity2 instrumentation has been used as a reliable indicator of ionic water quality, especially for ultrapure water (UPW). Traditionally, the instrumentation is procured, installed, powered up, and perhaps connected to a PLC, strip chart recorder, or a LAN. After that, the instrument and sensor receive no attention until a problem arises. Today, ...

Mar. 2, 1998

By SnowPure Water Technologies

Ultrapure Water: World Markets Report

Provides continually updated analyses and forecasts of ultrapure water systems and a number of specific components and consumables such as resins for power, pharmaceutical, semiconductor, and other industries. Click here for ...

Jun. 8, 2010

By The McIlvaine Company

A Case for Point-of-Use RO Ultrapure Water Systems

ULTRAPURE WATER CRITERIA - AN OVERVIEW 'Pure water' is a relative term. Practically speaking, no water, naturally occurring or treated by man, consists solely of H2O molecules. Forever in pursuit of achieving equilibrium with its surroundings, water has unique characteristics that result in its ability to dissolve most matter. This property of water to dissolve and transport materials is ...

Jan. 1, 2000

By GE Water & Process Technologies

Analysis of impurities in ultrapure water by dynamic reaction cell ICP-MS

Ultrapure Water (UPW) is used for the cleaning of instruments and containers in trace analysis and for dilution of samples. The analysis of impurities in UPW requires increasingly lower levels of detection and higher instrument productivity. SEMI Standard F63-03091 specifies a maximum contamination for metals of 0.02-0.1 ppb for each element for ultrapure water used in semiconductor processing. ...

Oct. 28, 2009

By PerkinElmer, Inc.

Water, Wastewater, and Filtration: World Markets Report

Forecasts of the $183 billion market for water and wastewater treatment and filtration products and services including outsourcing. Also included are world forecasts for chemicals, cartridges, macro filtration, membranes, sedimentation, centrifugation, and ultrapure water ...

Jun. 8, 2010

By The McIlvaine Company

The fundamental conductivity and resistivity of water

Pure water has a very low. but not quite zero, electrical conductivity. This conductivity provides a probe into fundamental properties of water, including the electrochemical mobility of the hydrogen and hydroxide ions. Deviation from this value is a measure of trace ionic impurities. Ultrapure water (UPW). with impurities at or below the sub-parts-per-billion range, is used extensively in many ...

Jan. 1, 2005

By SnowPure Water Technologies

Methods of Water Purification

This article is excerpted from 'Pure Water Handbook' published by Osmonics®, Inc. of Minnetonka, Minnesota USA and is printed with permission of Osmonics, Inc. Water treatment can be defined as any procedure or method used to alter the chemical composition or natural 'behavior' of a water supply. Water supplies are classified as either surface water or groundwater. The majority of public or ...

Jan. 1, 1992

By GE Water & Process Technologies

Add polish to high purity water

Electrodeionization (EDI) has recently gained widespread acceptance by water treatment companies and end users alike for almost all applications requiring high-purity water. EDI has proven to be a reliable, cost-effective solution for both end users and water treatment companies. End users purchasing capital equipment can eliminate on-site chemical regeneration. Water treatment companies selling ...

Jul. 1, 2010

By Agape Water Solutions, Inc.

Meeting water quality specifications for 300 mm processing

Abstract This paper reviews the historical ultrapure water specifications and compares them to the specifications for state of the art ...

Mar. 28, 2001

Detecting Mercury in Water

Determination of Mercury (Hg) in Water by Hand-Held, Portable Cold Vapor Atomic Fluorescence SpectrometryWater is the most familiar and most abundant compound on Earth, making up 71% of its surface area.[1]It is a vital component for all known forms of life and is the aquatic habitat for thousands of species of microalgae, fish and shellfish. [2] With the presence of running water in our ...

Aug. 11, 2015

By Arizona Instrument LLC

VSEP treats well and surface water to provide ultra clean drinking water

New Logic Research manufactures a proprietary vibrating membrane filtration system that is uniquely suited for treatment of commercial and domestic drinking water. The use of a vibrating membrane mechanism to avoid membrane fouling is new and is just the kind of improvement needed to make the use of membrane filtration an effective and economical treatment solution for drinking water. New Logic ...

May 31, 2007

By New Logic Research, Inc.

River water is filtered for use in an electronic disk manufacturing facility in Hokkaido, Japan

New Logic International installed its Vibratory Shear Enhanced Processing (VSEP) Phase I system in July, 1997, and the Phase II system in August 1998 at a major international electronic disk manufacturing facility at Hokkaido Island located in Northern Japan. The VSEP is used for treatment of river water for ultrapure water production at this facility. The VSEP system uses an ultrafiltration ...

May 31, 2007

By New Logic Research, Inc.

Water matrix effect on UV photodegradation of perfluorooctanoic acid

The widespread detection of perfluorinated compounds (PFCs) in the water environment has been a concern for the last several years, while effluents from wastewater treatment facilities are the major sources of these compounds. Even advanced oxidation technologies (AOTs) are not useful for mineralization of the compounds due to their very high stability. Photochemical techniques using particularly ...

Jan. 1, 2011

By IWA Publishing

Removal of bromide and bromate from drinking water using granular activated carbon

Granular activated carbon (GAC) was used to remove bromide (Br−) and bromate (BrO3−) from drinking water in both bench- and pilot-scale experiments. The present study aims to minimize BrO3− formation and eliminate BrO3− generated during the ozonation of drinking water, particularly in packaged drinking ...

Feb. 27, 2015

By IWA Publishing

Improving vacuum-UV (VUV) photolysis of organic compounds in water with a phosphor converted xenon excimer lamp emitting at 193 nm

A novel vacuum ultraviolet excimer lamp emitting light at 193 nm was used to investigate the degradation of organic micropollutants in ultrapure water and wastewater treatment plant (WWTP) effluent. Overall, light at 193 nm proved to be efficient to degrade the investigated micropollutants (diclofenac, diatrizoic acid, sulfamethoxazole). Experiments with WWTP effluent proved the ability of ...

Jun. 7, 2016

By IWA Publishing

Application of Membrane Technology for the Recovery and Reuse of Water

Abstract As water and sewer costs are expected to increase over the next decade, membrane technology will continue to be a viable and economical option in the recovery and reuse of water. This paper describes the mechanism of membrane effected separation (specifically reverse osmosis, ultrafiltration and microfiltration), membranes commercially available, membrane element configurations, and how ...

Jan. 1, 1995

Crossflow Membrane Filtration High-Purity Water Systems

INTRODUCTION As the electronics industry continues to provide us with such products as high resolution television, notebook size portable computers and cars with automatic navigation systems, it becomes necessary to produce semiconductors with finer device geometries to allow for efficient placement of more circuits per a given area. This requires increased control of a semiconductor's material ...

Apr. 1, 1991

By GE Water & Process Technologies

AU optronics uses aqueduct maps to assess water risk

This post is part of a series on World Water Week, an annual event designed to draw attention to and discuss global water issues. Read more posts in this series. This piece was co-authored by Keith Liao, Senior Engineer with the AU Optronics Corporate ...

Aug. 27, 2012

By World Resources Institute WRI

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