deionized water Articles

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Current Issues -- Novel, Practical Deionization Technology

by American Water Works Association (AWWA)  (Feb. 1, 2006)

Rapid economic and population growth in the developing world is creating wealth and increasing expectations while simultaneously straining water supply and quality. This situation will reach crisis proportions during the next several decades, and innovative water treatment technologies will be required to meet the challenge. Electrically ...

The Desel System – Capacitive Deionization for The Removal of Ions From Water

by Water Environment Federation (WEF)  (May 7, 2007)

Capacitive deionization (CDI) represents a new approach to the treatment of a variety of water/wastewater streams contaminated with inorganic compounds. ENPAR Technologies Inc. of Canada has developed its DesEL System, which combines high water recoveries with high ion removal efficiencies. The system operates on the principle of capacitive ...

RO brine treatment and recovery by biological activated carbon and capacitive deionization process

by IWA Publishing  (Jan. 1, 2011)

The generation of brine solutions from dense membrane (reverse osmosis, RO or nanofiltration, NF) water reclamation systems has been increasing worldwide, and the lack of cost effective disposal options is becoming a critical water resources management issue. In Singapore, NEWater is the product of a multiple barrier water reclamation process from ...

Electrodeionization - Ultrapure water

by SIMPEC S.r.l.  (Sep. 29, 2011)

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 ...

The Removal of Fluoride From Waters by Adsorption

by American Water Works Association (AWWA)  (Oct. 1, 1979)

In this study various types of adsorbents including activated carbon, activated bauxite, and activated alumina were use to remove fluoride from deionized-distilled water, seawater, and simulated geothermal water. The factors investigated were contact time, pH, salinity, the initial concentration of fluoride, and possible competition of ...

NDMA Formation in Water and Wastewater

by American Water Works Association (AWWA)  (Feb. 1, 2001)

N-nitrosodimethylamine (NDMA) is a carcinogen known to be present in various foods and industrial products. The US Environmental Protection Agency has established a 10(-6) cancer risk level for NDMA of 0.7 ng/l. NDMA has been found in the effluents of various water and wastewater plants, but its formation mechanism is not yet understood. This ...

Photodegradation of the antihistamine cetirizine in natural waters

by John Wiley & Sons, Ltd.  (Jul. 18, 2014)

The photodegradation rate of the anti‐histamine cetirizine (Zyrtec®) was investigated in various water matrices. The average observed first‐order photodegradation rate coefficient (kobs), obtained by linear regression of the logarithmic‐transformed cetirizine concentrations versus irradiation time in simulated sunlight, was 0.024 h−1 (n = 6; ...

Methods of Water Purification

by GE Water & Process Technologies  (Jan. 1, 1992)

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 ...

Case Study - Water Resuse/Recycle

by Applied Water Solutions, Inc.  (Mar. 17, 2010)

A leading electronics company faced increasing water costs of both influent and effluent. They contracted Applied Water Solutions for a pilot study using some of the most advanced methods of water purification on effluent from a clean out of place (COP) system. The pilot provided proof of principle of the selected process to recycle some of the DI ...

Detecting Mercury in Water

by Arizona Instrument LLC  (Aug. 11, 2015)

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] ...

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