STATISTICAL ANALYSIS OF NEWFOUNDLAND DRINKING WATER SOURCES CONTAINING ARSENIC
ABSTRACT Arsenic (As) is a toxic element that is released to the environment by natural processes and anthropogenic activities. Canada and the United States recently lowered their recommended maximum acceptable concentration for As in drinking water to 10 μg/l. However, As contents exceeding this le...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1089.4294 http://www.engr.mun.ca/%7Eccoles/Publications/CGS-07-As.pdf |
| Summary: | ABSTRACT Arsenic (As) is a toxic element that is released to the environment by natural processes and anthropogenic activities. Canada and the United States recently lowered their recommended maximum acceptable concentration for As in drinking water to 10 μg/l. However, As contents exceeding this level have been detected in many wells and some small surface water bodies in the eastern, central and western regions of Newfoundland. Of 52 sources surveyed 49 had As concentrations exceeding the 10 μg/l level. The primary purpose of this paper is to obtain a better understanding of the factors contributing to the high levels of As in ground and surface water supplies in Newfoundland. Water sample data for the 52 sources were statistically analyzed to identify significant correlations among 32 different parameters. Principal component analysis revealed some differences from water sources in the eastern region of Newfoundland where the main geological formations were different than in the central and western Newfoundland regions. RÉSUMÉ L'arsenic (As) est un élément toxique dégagé dans l'environnement par des processus naturels ainsi que par des activités anthropiques. Le Canada et les Ëtats-Unis ont récemment baissé leur niveau de concentration maximal recommandé pour l'As dans l'eau potable à 10 μg/l. Toutefois, des niveaux d'As dépassant ce seuil ont été détectés dans de nombreux puits et certains plans d'eaux des régions orientale, centrale et occidentale de Terre-Neuve. Des 52 sites étudiés, 49 avaient des concentrations d'As supérieures à la limite de 10 μg/l. Le but principal de cette communication est d'arriver à une meilleure compréhension des facteurs contribuant aux niveaux élevés de l'As dans les eaux souterraines et de surface à Terre-Neuve. Les données sur les échantillons d'eau provenant des 52 sites ont été soumises à une analyse statistique afin d'identifier des corrélations significatives parmi 32 paramètres. L'analyse des composantes principales a révélé certaines différences dans les eaux provenant ... |
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