Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/70348
Type: Artigo de periódico
Title: PROBLEMS OF CALCIUM IN THE WATER SUPPLY TO NOVA OLINDA - CE
Author: Mendonca, LAR
Santiago, MO
Frischkorn, H
Sasaki, JM
Abstract: The township of Nova Olinda, south of Ceara 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.
Subject: Water quality
calcite saturation index
calcite precipitation
Country: Brasil
Editor: Assoc Brasileira Engenharia Sanitaria Ambiental
Rights: aberto
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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