The Influence of Hydrogeological and Anthropogenic Variables on Phthalate Contamination in Eogenetic Karst Groundwater Systems

Details

• Personal Author:
  Alshawabkeh AN ; Cordero JF ; Ghasemizadeh R ; Kaeli D ; Macchiavelli RE ; Meeker JD ; Padilla IY ; Torres NI ; Yu X
• Description:
  This study investigates the occurrence of six phthalates and distribution of the three most-detected phthalates in the karst region of northern Puerto Rico (KRNPR) using data from historical records and current field measurements. Statistical data analyses, including ANOVA, Chi-Square, and logistic regression models are used to examine the major factors affecting the presence and concentrations of phthalates in the KRNPR. The most detected phthalates include DEHP, DBP, and DEP. At least one phthalate specie is detected above DL in 7% of the samples and 24% of the sampling sites. Concentrations of total phthalates average 5.08 +/- 1.37 ug L-1, and range from 0.093 to 58.4 ug L-1. The analysis shows extensive spatial and temporal presence of phthalates resulting from dispersed phthalate sources throughout the karst aquifers. Hydrogeological factors are significantly more important in predicting the presence and concentrations of phthalates in eogenetic karst aquifers than anthropogenic factors. Among the hydrogeological factors, time of detection and hydraulic conductivities larger than 300 m d-1 are the most influential factors. Persistent presence through time reflects continuous sources of phthalates entering the aquifers and a high capacity of the karst aquifers to store and slowly release contaminants for long periods of time. The influence of hydraulic conductivity reveals the importance of contaminant fate and transport mechanisms from contamination sources. This study improves the understanding of factors affecting the spatial variability and fate of phthalates in karst aquifers, and allows us to better predict their occurrence based on these factors. [Description provided by NIOSH]
• Subjects:
  Endocrine System Environmental Pollution Occupational Health Phthalic Acids Safety
• Keywords:
  Author Keywords: Groundwater Contamination Endocrine Disruptors Environmental Contamination Environmental Impacts Ground Water Karst Aquifers Logistic Regression Model Phthalates Water Supply
• ISSN:
  0269-7491
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Georgia ; Massachusetts ; Michigan ; OSHA Region 1 ; OSHA Region 2 ; OSHA Region 4 ; OSHA Region 5 ; Puerto Rico
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  298-307
• Volume:
  237
• NIOSHTIC Number:
  nn:20056657
• Citation:
  Environ Pollut 2018 Jun; 237:298-307
• Contact Point Address:
  Ingrid Y. Padilla, Department of Civil Engineering and Surveying, University of Puerto Rico at Mayagüez, PO Box 9000, Mayagüez, PR 00681, USA
• Email:
  ingrid.padilla@upr.edu
• Federal Fiscal Year:
  2018
• Performing Organization:
  University of Michigan, Ann Arbor
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Environmental Pollution
• End Date:
  20280630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:8fca06491db8abe4a03d016361ccde951a5d903f765b9f677274930be1a7cc8de833296776d66d0215d0aa51df61c968e8094c861c84f2b5500ce6c720e9ed77
• Download URL:
  https://stacks.cdc.gov/view/cdc/214215/cdc_214215_DS1.pdf
• File Type:
  [PDF - 2.50 MB ]