Risk evaluation of toxic chemicals in the geo-environment by site-specific risk assessment model

Y. Kawabe, J. Hara, Y. Sakamoto, T. Komai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A risk assessment model which can be evaluated risk levels of toxic chemicals for human beings living in contaminated both onsite and offsite have been developed. The case studies of the risk assessment by using this model were carried out and the exposure rates, the distribution of exposure paths and the risk level of toxic chemicals in the geo-environment were estimated. The main exposure pathways of trichloroethylene (TCE) at the onsite were inhalation air, groundwater intake and crops intake, which indicates that TCE easily volatilize into the air and migrate into the pore water from the soil. The exposure rate of the inhalation air at the offsite was not so high, because the concentration of TCE in the air at the offsite was decreased by the fresh air. However, the exposure rate of the groundwater intake at the offsite had a high risk when no degradation and no adsorption of TCE occurred in the groundwater environment. Considering the adsorption or the degradation of TCE, the risk level from the groundwater intake at the offsite was not so high. To raise the precision of the evaluation, it is very important to obtain these site-specific parameters.

Original languageEnglish
Title of host publicationWATER DYANMICS
Subtitle of host publication4th International Workshop on Water Dynamics
Pages227-230
Number of pages4
DOIs
Publication statusPublished - 2007 May 11
Externally publishedYes
Event4th International Workshop on Water Dynamics - Sendai, Japan
Duration: 2006 Nov 72006 Nov 8

Publication series

NameAIP Conference Proceedings
Volume898
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other4th International Workshop on Water Dynamics
CountryJapan
CitySendai
Period06/11/706/11/8

Keywords

  • Groundwater
  • Heavy metals
  • Organic compounds
  • Risk assessment
  • Risk model
  • Soil

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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