Groundwater nitrate contamination and risk assessment in an agricultural area, South Korea

Jae Yeol Cheong, Se Yeong Hamm, Jeong Hwan Lee, Kwang Sik Lee, Nam Chil Woo

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The nitrate of groundwater in the Gimpo agricultural area, South Korea, was characterized by means of nitrate concentration, nitrogen-isotope analysis, and the risk assessment of nitrogen. The groundwaters belonging to Ca-(Cl + NO 3) and Na-(Cl + NO 3) types displayed a higher average NO 3 - concentration (79.4 mg/L), exceeding the Korean drinking water standard (<44.3 mg/L NO 3 -). The relationship between δ 18O-NO 3 - values and δ 15N-NO 3 - values revealed that nearly all groundwater samples with δ 15N-NO 3 - of +7.57 to +13.5‰ were affected by nitrate from manure/sewage as well as microbial nitrification and negligible denitrification. The risk assessment of nitrate for groundwater in the study area was carried out using the risk-based corrective action model since it was recognized that there is a necessity of a quantitative assessment of health hazard, as well as a simple estimation of nitrate concentration. All the groundwaters of higher nitrate concentration than the Korean drinking water standard (<44.3 mg/L NO 3 -) belonged to the domain of the hazard index <1, indicating no health hazard by nitrate in groundwater in the study area. Further, the human exposure to the nitrate-contaminated soil was below the critical limit of non-carcinogenic risk.

Original languageEnglish
Pages (from-to)1127-1136
Number of pages10
JournalEnvironmental Earth Sciences
Volume66
Issue number4
DOIs
Publication statusPublished - 2012 Jun 1

Fingerprint

South Korea
Nitrates
Risk assessment
risk assessment
Groundwater
groundwater
Contamination
agricultural land
nitrates
nitrate
Health hazards
health hazards
Potable water
Drinking Water
drinking water
Nitrogen Isotopes
Nitrogen
Nitrification
contamination
Denitrification

All Science Journal Classification (ASJC) codes

  • Global and Planetary Change
  • Environmental Chemistry
  • Water Science and Technology
  • Soil Science
  • Pollution
  • Geology
  • Earth-Surface Processes

Cite this

Cheong, Jae Yeol ; Hamm, Se Yeong ; Lee, Jeong Hwan ; Lee, Kwang Sik ; Woo, Nam Chil. / Groundwater nitrate contamination and risk assessment in an agricultural area, South Korea. In: Environmental Earth Sciences. 2012 ; Vol. 66, No. 4. pp. 1127-1136.
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Groundwater nitrate contamination and risk assessment in an agricultural area, South Korea. / Cheong, Jae Yeol; Hamm, Se Yeong; Lee, Jeong Hwan; Lee, Kwang Sik; Woo, Nam Chil.

In: Environmental Earth Sciences, Vol. 66, No. 4, 01.06.2012, p. 1127-1136.

Research output: Contribution to journalArticle

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