Evaluating the secondary effects of magnetic ion exchange: Focus on corrosion potential in the distribution system

Stephanie K L Ishii, Treavor Boyer

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

In order to avoid the adverse effects of corrosion in water distribution systems, it is necessary to evaluate the secondary effects of magnetic ion exchange (MIEX) for the removal of dissolved organic matter (DOM). As DOM concentrations in surface waters increase and surface waters become more prevalent sources of drinking water, MIEX treatment will be increasingly used. This study evaluated the effects of MIEX treatment on iron and lead corrosion potential as measured by the Larson-Skold Index (LI) and chloride-to-sulfate mass ratio (CSMR), respectively. This was accomplished by analyzing data sets from bench- and pilot-scale MIEX experiments, as well as by monitoring a full-scale MIEX treatment plant. It was found that MIEX treatment consistently increased the CSMR, however, the extent of the increase was dependent on influent anion concentrations, MIEX resin regeneration, and other variables. MIEX treatment had only a minor effect on the LI. Both corrosion parameters were variable due to the periodic transfer of excess brine into the process train during regeneration cycles and fluctuations in raw water quality. It was also found that MIEX resin can re-release previously removed anions, such as sulfate and bicarbonate, which reinforces the need to evaluate secondary changes in water chemistry.

Original languageEnglish (US)
Pages (from-to)31-38
Number of pages8
JournalDesalination
Volume274
Issue number1-3
DOIs
StatePublished - Jul 1 2011
Externally publishedYes

Fingerprint

distribution system
corrosion
ion exchange
Ion exchange
Corrosion
Magnetic scales
Sulfates
Ion Exchange Resins
Ion exchange resins
Surface waters
Biological materials
Anions
Chlorides
sulfate
Negative ions
dissolved organic matter
anion
resin
Water distribution systems
regeneration

Keywords

  • Chloride-to-sulfate mass ratio
  • Corrosion
  • Larson-Skold Index
  • MIEX
  • Natural organic matter

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Chemistry(all)
  • Materials Science(all)
  • Water Science and Technology

Cite this

Evaluating the secondary effects of magnetic ion exchange : Focus on corrosion potential in the distribution system. / Ishii, Stephanie K L; Boyer, Treavor.

In: Desalination, Vol. 274, No. 1-3, 01.07.2011, p. 31-38.

Research output: Contribution to journalArticle

@article{d06d34c62ad4489c8afdc8480986d206,
title = "Evaluating the secondary effects of magnetic ion exchange: Focus on corrosion potential in the distribution system",
abstract = "In order to avoid the adverse effects of corrosion in water distribution systems, it is necessary to evaluate the secondary effects of magnetic ion exchange (MIEX) for the removal of dissolved organic matter (DOM). As DOM concentrations in surface waters increase and surface waters become more prevalent sources of drinking water, MIEX treatment will be increasingly used. This study evaluated the effects of MIEX treatment on iron and lead corrosion potential as measured by the Larson-Skold Index (LI) and chloride-to-sulfate mass ratio (CSMR), respectively. This was accomplished by analyzing data sets from bench- and pilot-scale MIEX experiments, as well as by monitoring a full-scale MIEX treatment plant. It was found that MIEX treatment consistently increased the CSMR, however, the extent of the increase was dependent on influent anion concentrations, MIEX resin regeneration, and other variables. MIEX treatment had only a minor effect on the LI. Both corrosion parameters were variable due to the periodic transfer of excess brine into the process train during regeneration cycles and fluctuations in raw water quality. It was also found that MIEX resin can re-release previously removed anions, such as sulfate and bicarbonate, which reinforces the need to evaluate secondary changes in water chemistry.",
keywords = "Chloride-to-sulfate mass ratio, Corrosion, Larson-Skold Index, MIEX, Natural organic matter",
author = "Ishii, {Stephanie K L} and Treavor Boyer",
year = "2011",
month = "7",
day = "1",
doi = "10.1016/j.desal.2011.01.061",
language = "English (US)",
volume = "274",
pages = "31--38",
journal = "Desalination",
issn = "0011-9164",
publisher = "Elsevier",
number = "1-3",

}

TY - JOUR

T1 - Evaluating the secondary effects of magnetic ion exchange

T2 - Focus on corrosion potential in the distribution system

AU - Ishii, Stephanie K L

AU - Boyer, Treavor

PY - 2011/7/1

Y1 - 2011/7/1

N2 - In order to avoid the adverse effects of corrosion in water distribution systems, it is necessary to evaluate the secondary effects of magnetic ion exchange (MIEX) for the removal of dissolved organic matter (DOM). As DOM concentrations in surface waters increase and surface waters become more prevalent sources of drinking water, MIEX treatment will be increasingly used. This study evaluated the effects of MIEX treatment on iron and lead corrosion potential as measured by the Larson-Skold Index (LI) and chloride-to-sulfate mass ratio (CSMR), respectively. This was accomplished by analyzing data sets from bench- and pilot-scale MIEX experiments, as well as by monitoring a full-scale MIEX treatment plant. It was found that MIEX treatment consistently increased the CSMR, however, the extent of the increase was dependent on influent anion concentrations, MIEX resin regeneration, and other variables. MIEX treatment had only a minor effect on the LI. Both corrosion parameters were variable due to the periodic transfer of excess brine into the process train during regeneration cycles and fluctuations in raw water quality. It was also found that MIEX resin can re-release previously removed anions, such as sulfate and bicarbonate, which reinforces the need to evaluate secondary changes in water chemistry.

AB - In order to avoid the adverse effects of corrosion in water distribution systems, it is necessary to evaluate the secondary effects of magnetic ion exchange (MIEX) for the removal of dissolved organic matter (DOM). As DOM concentrations in surface waters increase and surface waters become more prevalent sources of drinking water, MIEX treatment will be increasingly used. This study evaluated the effects of MIEX treatment on iron and lead corrosion potential as measured by the Larson-Skold Index (LI) and chloride-to-sulfate mass ratio (CSMR), respectively. This was accomplished by analyzing data sets from bench- and pilot-scale MIEX experiments, as well as by monitoring a full-scale MIEX treatment plant. It was found that MIEX treatment consistently increased the CSMR, however, the extent of the increase was dependent on influent anion concentrations, MIEX resin regeneration, and other variables. MIEX treatment had only a minor effect on the LI. Both corrosion parameters were variable due to the periodic transfer of excess brine into the process train during regeneration cycles and fluctuations in raw water quality. It was also found that MIEX resin can re-release previously removed anions, such as sulfate and bicarbonate, which reinforces the need to evaluate secondary changes in water chemistry.

KW - Chloride-to-sulfate mass ratio

KW - Corrosion

KW - Larson-Skold Index

KW - MIEX

KW - Natural organic matter

UR - http://www.scopus.com/inward/record.url?scp=79955465135&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79955465135&partnerID=8YFLogxK

U2 - 10.1016/j.desal.2011.01.061

DO - 10.1016/j.desal.2011.01.061

M3 - Article

AN - SCOPUS:79955465135

VL - 274

SP - 31

EP - 38

JO - Desalination

JF - Desalination

SN - 0011-9164

IS - 1-3

ER -