期刊
JOURNAL OF HYDROLOGY
卷 383, 期 1-2, 页码 18-29出版社
ELSEVIER
DOI: 10.1016/j.jhydrol.2009.06.039
关键词
Monitoring; Priority compounds; Water; Principal Component Analysis (PCA)
资金
- European Union [505428 GOCE]
- Spanish Ministry of Education and Science [CTM2005-25168-E]
- Departarrient d'Universitats, Recerca i Societat de la Infonnacio de la Generalitat de Catatunya [2004FI 00856]
We report the temporal and geographical variations of a set of 30 pesticides (including triazines, organophosphorus and acetanilides) and industrial compounds in surface waters along the Ebro River during the period 2004-2006. Using descriptive statistics we found that the compounds with industrial origin (tributylphosphate, octylphenol and nonylphenol) appeared in over 60% of the samples analyzed and at very high concentrations, while pesticides had a point source origin in the Ebro delta area and overall low-levels, between 0.005 and 2.575 mu g L-1, Correlations among pollutants and their distributions were studied using Principal Component Analysis (PCA), a multivariate exploratory data analysis technique which permitted us to discern between agricultural and industrial source contamination. Over a 3 years period a seasonal trend revealed highest concentrations of pesticides over the spring-summer period following pesticide application. (C) 2009 Elsevier B.V. All rights reserved.
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