Application of boron and tritium isotopes for tracing landfill contamination in groundwater

Angela Nigro, Giuseppe Sappa, Maurizio Barbieri

Research output: Contribution to journalArticle

  • 2 Citations

Abstract

Groundwater beneath a municipal solid waste landfill area in central Italy has been studied. The study included two sampling events: in June and October 2014. The aim of this study was to determine the quality of groundwater and to test the use of boron and tritium isotopes as tracers of contamination due to the presence of the landfill. The results of chemical analyses indicate that the samples collected from boreholes located downgradient from the landfill are contaminated. The principal contaminants are Cl, NH4 +, Fe, As, Cr, B, Hg and Zn, which were detected at maximum levels during the June sampling event. The boron and tritium isotopic composition of the collected water samples was analysed to evaluate the source of contamination. The results indicated a δ11B value of 19.31‰ for uncontaminated groundwater, while δ11B values between 4.37 and 9.41‰ were reported for contaminated groundwater. The correlation between boron and chloride provided a basis for evaluating the plume direction. Tritium (3H) isotopes were analysed during the second sampling event (October). The results indicate that 3H values ranging between 2.7 and 3.6 TU were reported for uncontaminated waters; this groundwater has a short residence time in the aquifer. A 3H value of 34.5 TU was reported for one groundwater sample (Sample 7). This value is indicative of contamination by landfill leachate.

Original languageEnglish
Pages (from-to)101-108
Number of pages8
JournalJournal of Geochemical Exploration
Volume172
DOIs
StatePublished - 1 Jan 2017

Fingerprint

groundwater
Groundwater
landfill
tritium
boron
Acridine Orange
Land fill
isotope
sampling
Beta-Globulins
water
municipal solid waste
leachate
residence time
isotopic composition
borehole
plume
tracer
chloride
aquifer

Keywords

  • Boron isotope
  • Groundwater
  • Landfill
  • Tritium isotope

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Economic Geology

Cite this

Application of boron and tritium isotopes for tracing landfill contamination in groundwater. / Nigro, Angela; Sappa, Giuseppe; Barbieri, Maurizio.

In: Journal of Geochemical Exploration, Vol. 172, 01.01.2017, p. 101-108.

Research output: Contribution to journalArticle

Nigro, Angela; Sappa, Giuseppe; Barbieri, Maurizio / Application of boron and tritium isotopes for tracing landfill contamination in groundwater.

In: Journal of Geochemical Exploration, Vol. 172, 01.01.2017, p. 101-108.

Research output: Contribution to journalArticle

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