| Summary: | 碩士 === 國立中央大學 === 應用地質研究所 === 103 === There are many contaminated groundwater chlorinated solvent sites in Taiwan. The chlorinated solvent will cause harm to human health. Biotransformation of the chlorinated ethenes occurs via sequential dechlorination of perchloroethylene to trichloroethylene, trichloroethylene to dichloroethane, dichloroethane to vinyl chloride, and finally vinyl chloride to ethene. The chlorinated solvent sites have many remedial technology could choose. Monitored natural attenuation is concept for the remediation; used monitored natural attenuation need initial screening. BIOCHLOR is screening tool that is provided by the Center for Subsurface modeling Support of US Environmental Protection Agency. The BIOCHLOR 2.2 has two problems: (1) BIOCHLOR uses the Domenico solution that has literature indicate when dispersivity is large have increase error. (2) BIOCHLOR uses one retardation factor, not individual retardation factors for each constituent. In this study is to functional evaluation of BIOCHLOR 2.2 and comparison with HYDROGEOCHEM 4.5s. The results show BIOCHLOR 2.2 applied to small dispersivity, concentration become steady state and only more credible of perchloroethene, trichloroethene, dichloroethene. BIOCHLOR 2.2 is unsuitable for cancer risk assessment of vinyl chloride, because there are underestimate risk.
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