Drinking water treatment residuals: A review of recent uses

J. A. Ippolito, K. A. Barbarick, Herschel Adams Elliott

Research output: Contribution to journalReview article

151 Citations (Scopus)

Abstract

Coagulants such as alum [Al2(SO4)3• 14H2O], FeCl3, or Fe2(SO4) 3 are commonly used to remove particulate and dissolved constituents from water supplies in the production of drinking water. The resulting waste product, called watertreatment residuals (WTR), contains precipitated Al and Fe oxyhydroxides, resulting in a strong affinity for anionic species. Recent research has focused on using WTR as cost-effective materials to reduce soluble phosphorus (P) in soils, runoff, and land-applied organic wastes (manures and biosolids). Studies show P adsorption by WTR to be fast and nearly irreversible, suggesting long-term stable immobilization of WTR-bound P. Because excessive WTR application can induce P deficiency in crops, effective application rates and methods remain an area of intense research. Removal of other potential environmental contaminants [ClO4-, Se(+IV and +VI), As(+III and +V), and Hg] by WTR has been documented, suggesting potential use of WTR in environmental remediation. Although the creation of Al plant toxicity and enhanced Al leaching are concerns expressed by researchers, these effects are minimal at circumneutral soil pH conditions. Radioactivity, trace element levels, and enhanced Mn leaching have also been cited as potential problems in WTR usage as a soil supplement. However, these issues can be managed so as not to limit the beneficial use of WTR in controlling off-site P losses to sensitive water bodies or reducing soil-extractable P concentrations.

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalJournal of Environmental Quality
Volume40
Issue number1
DOIs
StatePublished - Jan 1 2011

Fingerprint

Water treatment
Potable water
Soils
Leaching
soil
leaching
Biosolids
Manures
Radioactivity
biosolid
Trace elements
Runoff
Water supply
radioactivity
immobilization
Crops
Toxicity
Phosphorus
manure
remediation

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Management, Monitoring, Policy and Law

Cite this

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title = "Drinking water treatment residuals: A review of recent uses",
abstract = "Coagulants such as alum [Al2(SO4)3• 14H2O], FeCl3, or Fe2(SO4) 3 are commonly used to remove particulate and dissolved constituents from water supplies in the production of drinking water. The resulting waste product, called watertreatment residuals (WTR), contains precipitated Al and Fe oxyhydroxides, resulting in a strong affinity for anionic species. Recent research has focused on using WTR as cost-effective materials to reduce soluble phosphorus (P) in soils, runoff, and land-applied organic wastes (manures and biosolids). Studies show P adsorption by WTR to be fast and nearly irreversible, suggesting long-term stable immobilization of WTR-bound P. Because excessive WTR application can induce P deficiency in crops, effective application rates and methods remain an area of intense research. Removal of other potential environmental contaminants [ClO4-, Se(+IV and +VI), As(+III and +V), and Hg] by WTR has been documented, suggesting potential use of WTR in environmental remediation. Although the creation of Al plant toxicity and enhanced Al leaching are concerns expressed by researchers, these effects are minimal at circumneutral soil pH conditions. Radioactivity, trace element levels, and enhanced Mn leaching have also been cited as potential problems in WTR usage as a soil supplement. However, these issues can be managed so as not to limit the beneficial use of WTR in controlling off-site P losses to sensitive water bodies or reducing soil-extractable P concentrations.",
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Drinking water treatment residuals : A review of recent uses. / Ippolito, J. A.; Barbarick, K. A.; Elliott, Herschel Adams.

In: Journal of Environmental Quality, Vol. 40, No. 1, 01.01.2011, p. 1-12.

Research output: Contribution to journalReview article

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