Screening-Level Ecological Risk Assessment for Beneficial Reuse as Soil of Dredged Sediment Contaminated with Heavy Metals

Kim, Moonkyung; Kim, Kibeum; Choi, Yongju; Nam, Kyoungphile; Kim, Moonkyung; Kim, Kibeum; Choi, Yongju; Nam, Kyoungphile

doi:2016.38.5.236

The Korean text of this paper can be translated into multiple languages on the website of http://jksee.or.kr through Google Translator.

J Korean Soc Environ Eng > Volume 38(5); 2016 > Article

Original Paper

J Korean Soc Environ Eng 2016;38(5): 236-241. doi: https://doi.org/10.4491/KSEE.2016.38.5.236

중금속 오염 준설토의 토양으로서의 유효활용을 위한 선별수준 생태위해도평가

김문경, 김기범, 최용주, 남경필

서울대학교 건설환경공학부

Screening-Level Ecological Risk Assessment for Beneficial Reuse as Soil of Dredged Sediment Contaminated with Heavy Metals

Moonkyung Kim, Kibeum Kim, Yongju Choi, Kyoungphile Nam

Department of Civil and Environmental Engineering, Seoul National University

Corresponding author

Kyoungphile Nam ,Tel: 02-880-1448, Fax: 02-873-2684, Email: kpnam@snu.ac.kr

Received: November 16, 2015; Revised: January 12, 2016; Accepted: March 31, 2016. Published online: May 31, 2016.

ABSTRACT

This study conducted a screening-level ecological risk assessment for heavy metals in dredged sediment for recycling in terrestrial environment. Toxicological information of six heavy metals (i.e., Cu, Zn, Cd, Pb, Cr, and Ni) was collected from ECOTOX of US Environmental Protection Agency, and screened and qualified for the use in the screening-level ecological risk assessment. According to the number of terrestrial ecological receptors for which toxicological information is available, PNEC (Predicted No Effect Concentration) of each heavy metal was derived using either stochastic approach (for Cu, Zn, and Cd), or deterministic approach (for Pb, Cr, and Ni). Hazard quotients of the six heavy metals were derived for a field-collected dredged sediment using the PNEC derived and the PEC (Predicted Environmental Concentration) determined for the dredged sediment. The HQs of Cu, Zn, Cr, Pb and Ni were higher than unity indicating a possibility of ecological risk of the five heavy metals when the dredged sediment is applied in terrestrial environment. Accordingly, remediation processes or a higher-level ecological risk assessment would be needed for the recycling of the material.

Key Words: Screening-level Ecological Risk Assessment, Heavy Metal Contamination, Sediment, Beneficial Reuse of Sediment