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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evaluation of the chemical composition of the Guarapiranga water system: case study (2002 and 2003)

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Author(s):
Eduardo M. Richter [1] ; Adalgiza Fornaro [2] ; Claudimir L. do Lago [3] ; Lúcio Angnes [4]
Total Authors: 4
Affiliation:
[1] Universidade Federal de Uberlândia. Instituto de Química - Brasil
[2] Universidade de São Paulo. Instituto de Astronomia, Geofísica e Ciências Atmosféricas - Brasil
[3] Universidade de São Paulo. Instituto de Química - Brasil
[4] Universidade de São Paulo. Instituto de Química - Brasil
Total Affiliations: 4
Document type: Journal article
Source: Química Nova; v. 30, n. 5, p. 1147-1152, 2007-10-00.
Field of knowledge: Physical Sciences and Mathematics - Chemistry
Abstract

The supply of drinking water in the Metropolitan Area of São Paulo City has been a great and serious challenge in the latest years. This work demonstrates the viability of the evaluation of the degree of contamination of the water reservoirs using analytical procedures, which allow the analysis of several compounds at relatively low cost: stripping square wave voltammetry (SSWV) and capillary zone electrophoresis with contactless conductivity detection (CZE-CCD). The results of ionic composition indicated significant contamination of the Guarapiranga water system by human activities on the reservoir banks. In fact, the Guavirutuba and Itupu streams presented high concentrations of phosphate and ammonium ions. This can be directly related to misuse and unruled occupation of the soil and precarious sanitary infrastructure. (AU)