Distribution of Desalinated Seawaters: Are Corrosion Indicators Sufficient?

Cheng, Robert C.; Andrews-Tate, Cynthia; Tseng, Tai J.; Wattier, Kevin L.

doi:10.1179/ida.2010.2.1.24

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…In many studies, CCPP is used as standard index for the CaCO 3 precipitation [26,41,42]. For example, in the USA, a range for CCPP values of between 4 and 10 mg/L as CaCO 3 is the most common recommendation [38].…”

Section: Resultsmentioning

confidence: 99%

Potential for iron release in drinking water distribution system: a case study of Hamedan city, Iran

Mesdaghinia

Nabizadeh

Nasseri

et al. 2016

Desalination and Water Treatment

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A B S T R A C TBlending of water from different sources into an urban drinking water distribution system can have unintended impacts, such as corrosion and/or release of corrosion by-products from pipe surfaces. Hamedan, a city in west Iran, receives water from four different sources that have different physical and chemical characteristics. The potential for iron release from iron distribution pipes due to in situ blending of different sources was investigated in this study. A dedicated software was developed to calculate the corrosion indices of different blends expected in different zones of Hamedan's water distribution system. The calculated corrosion indices, and iron release were verified and correlated to actual conditions through water sampling conducted in different zones of the city. The Langelier index (LI), Ryznar stability index (RSI or RI), Puckorius scaling index (PSI), and the calcium carbonate precipitation potential were found to be −0.60 ± 0.30, 8.63 ± 0.57, 8.18 ± 0.34, and −10.95 ± 6.9 mg CaCO 3 /L, respectively. Alkalinity, pH, and carbonate ion were identified as the important parameters that have a role in the control of iron release. Significant linear correlations of LI, RI, and PSI to iron concentration were observed in samples collected from different zones of the distribution system. The spatial correlation between iron concentration and corrosion indices in different zones of the water distribution system was determined using ordinary Kriging interpolation. These indices indicated a wide variation of corrosive potential in different zones of the distribution system. Therefore, these corrosion indices can be used to estimate, monitor, and minimize the potential for iron release from distribution systems.

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Section: Resultsmentioning

confidence: 99%

Potential for iron release in drinking water distribution system: a case study of Hamedan city, Iran

Mesdaghinia

Nabizadeh

Nasseri

et al. 2016

Desalination and Water Treatment

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“…As noted by McNeill and Edwards, the AWWA manual on corrosion states, “In light of much empirical contradicting of the presumed connection between the LSI and corrosion, the practice should be abandoned.” Despite general criticisms offered by the water industry, most US water purveyors regularly monitor, document, and report the LSI on monthly operating reports, particularly when advanced processes are used in part or entirely for treatment and are deemed important for utility administrator decision‐making and regulatory monitoring purposes. Recent work by Cheng et al (2010) indicated that for water supplies in which desalted permeate was blended, the LSI was the more useful indicator as a surrogate for most corrosion indexes, with the exception of the aggressiveness index (AI) and the chloride‐to‐sulfate mass ratio (CSMR). Furthermore, the LSI was an effective measure of the corrosiveness of different ratios of blended supplies when permeate was integrated into the water supply portfolio.…”

Section: Introductionmentioning

confidence: 99%

Guidance and recommendations for posttreatment of desalinated water

Duranceau

Wilder

Douglas³

2012

Journal AWWA

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As part of a Water Research Foundation project called Post‐Treatment Stabilization of Desalinated Water, current posttreatment issues related to desalination were explored in an effort to provide guidance to the water industry. Although literature on posttreatment exists, there are fundamental knowledge gaps on accepted water quality goals for posttreated finished water related to location, source water, and membrane process. This article provides a current overview of the literature on posttreated desalinated water and discusses posttreatment issues identified and ranked by experienced desalination professionals. Guidance and recommendations were developed for priority issues regarding posttreatment design and operation (including increased characterization of membrane permeate quality), membrane pilot‐study evaluations (including posttreatment evaluations), and increased distribution system monitoring after full‐scale operation. Finished water quality goals and posttreatment processes were developed according to type of source water and membrane process and are recommended on the basis of available literature, industry experience, and research findings.

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Distribution of Desalinated Seawaters: Are Corrosion Indicators Sufficient?

Cited by 2 publications

References 2 publications

Potential for iron release in drinking water distribution system: a case study of Hamedan city, Iran

Potential for iron release in drinking water distribution system: a case study of Hamedan city, Iran

Guidance and recommendations for posttreatment of desalinated water

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