Problems of calcium in the water supply to nova olinda - ce

L.A.R. Mendonca, M.O. Santiago, H. Frischkorn, J.M. Sasaki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The township of Nova Olinda, south of Ceará, is supplied with waters from four deep wells exploiting a confined sandstone aquifer. Calcite and gypsum rock outcrop and are being exploited commercially in the watershed where three of the wells are located. Since 2006, public supply pipelines are damaged due to a sheet-like precipitation causing frequent obstruction of the pipes. In this investigation we used chemical analyses, physical chemistry, X-ray analyses and determination of the calcite saturation index - CSI for studying possible causes for the deposits identified, basically, as calcite. Calcium concentrations and CSIs indicate that the water disinfection process adopted increases the tendency of calcite precipitation due to calcium contained in the chemicals used.
Original languageEnglish
Pages (from-to)298-305
Number of pages7
JournalEngenharia sanitaria e ambiental
Issue number3
Publication statusPublished - Jul 2008


  • water quality
  • calcite saturation index
  • calcite precipitation


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