Development of chloropyromorphite coatings for lead water pipes

Jeremy D. Hopwood; Roger J. Davey; Merfyn O. Jones; Robin G. Pritchard; Peter T. Cardew; Ann Booth

doi:10.1039/b111379h

Development of chloropyromorphite coatings for lead water pipes

Jeremy D. Hopwood, Roger J. Davey, Merfyn O. Jones, Robin G. Pritchard, Peter T. Cardew, Ann Booth

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Formation of inorganic barrier coatings on lead water pipes might be an attractive option for water companies wishing to reduce lead levels in drinking water. This paper concerns the treatment of such pipes with aqueous solutions containing oxidant together with sources of phosphate and chloride to generate coatings of the highly insoluble lead mineral chloropyromorphite, Pb₅(PO₄)₃Cl by simultaneous oxidation and precipitation, SEM, TEM, XRD and overnight leaching tests were used to characterise the structure and performance of the coatings. The impact of the choice of oxidant on the coating morphology and barrier properties is explored. Strategies for further refinement of the coatings via improved process control and morphological modification are discussed.

Original language	English
Pages (from-to)	1717-1723
Number of pages	7
Journal	Journal of Materials Chemistry
Volume	12
Issue number	6
DOIs	https://doi.org/10.1039/b111379h
Publication status	Published - 30 Apr 2002
Externally published	Yes

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AU - Davey, Roger J.

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AU - Cardew, Peter T.

AU - Booth, Ann

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AB - Formation of inorganic barrier coatings on lead water pipes might be an attractive option for water companies wishing to reduce lead levels in drinking water. This paper concerns the treatment of such pipes with aqueous solutions containing oxidant together with sources of phosphate and chloride to generate coatings of the highly insoluble lead mineral chloropyromorphite, Pb5(PO4)3Cl by simultaneous oxidation and precipitation, SEM, TEM, XRD and overnight leaching tests were used to characterise the structure and performance of the coatings. The impact of the choice of oxidant on the coating morphology and barrier properties is explored. Strategies for further refinement of the coatings via improved process control and morphological modification are discussed.

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Development of chloropyromorphite coatings for lead water pipes

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