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Spatiotemporal changes of CVOC concentrations in karst aquifers: analysis of three decades of data from Puerto Rico.
Yu, Xue; Ghasemizadeh, Reza; Padilla, Ingrid; Irizarry, Celys; Kaeli, David; Alshawabkeh, Akram.
Afiliação
  • Yu X; Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115, USA.
  • Ghasemizadeh R; Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115, USA.
  • Padilla I; Department of Civil Engineering and Surveying, University of Puerto Rico, Mayaguez, PR 00682, USA.
  • Irizarry C; Department of Civil Engineering and Surveying, University of Puerto Rico, Mayaguez, PR 00682, USA.
  • Kaeli D; Department of Electrical and Computer Engineering, Northeastern University, Boston, MA 02115, USA.
  • Alshawabkeh A; Department of Civil and Environmental Engineering, Northeastern University, Boston, MA 02115, USA. Electronic address: aalsha@coe.neu.edu.
Sci Total Environ ; 511: 1-10, 2015 Apr 01.
Article em En | MEDLINE | ID: mdl-25522355
We studied the spatial and temporal distribution patterns of Chlorinated Volatile Organic Compounds (CVOCs) in the karst aquifers in northern Puerto Rico (1982-2013). Seventeen CVOCs were widely detected across the study area, with the most detected and persistent contaminated CVOCs including trichloroethylene (TCE), tetrachloroethylene (PCE), carbon tetrachloride (CT), chloroform (TCM), and methylene chloride (DCM). Historically, 471 (76%) and 319 (52%) of the 615 sampling sites have CVOC concentrations above the detection limit and maximum contamination level (MCL), respectively. The spatiotemporal patterns of the CVOC concentrations showed two clusters of contaminated areas, one near the Superfund site "Upjohn" and another near "Vega Alta Public Supply Wells." Despite a decreasing trend in concentrations, there is a general northward movement and spreading of contaminants even beyond the extent of known sources of the Superfund and landfill sites. Our analyses suggest that, besides the source conditions, karst characteristics (high heterogeneity, complex hydraulic and biochemical environment) are linked to the long-term spatiotemporal patterns of CVOCs in groundwater.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Água Subterrânea / Monitoramento Ambiental / Compostos Orgânicos Voláteis País/Região como assunto: Caribe / Puerto rico Idioma: En Revista: Sci Total Environ Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Holanda
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Água Subterrânea / Monitoramento Ambiental / Compostos Orgânicos Voláteis País/Região como assunto: Caribe / Puerto rico Idioma: En Revista: Sci Total Environ Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Holanda