Risk dynamic evolution index based on fraction transformation and its application to site risk assessment

Haochen Dong; Minoru Yoneda; Liu Feng

doi:10.1016/j.jhazmat.2021.125210

Risk dynamic evolution index based on fraction transformation and its application to site risk assessment

J Hazard Mater. 2021 Jun 15:412:125210. doi: 10.1016/j.jhazmat.2021.125210. Epub 2021 Jan 26.

Authors

Haochen Dong¹, Minoru Yoneda², Liu Feng³

Affiliations

¹ Division of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto 6158540, Japan; Department of Environmental Sciences and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
² Division of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto 6158540, Japan.
³ Department of Environmental Sciences and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China. Electronic address: fengliu-buct@vip.sina.com.

PMID: 33529833
DOI: 10.1016/j.jhazmat.2021.125210

Abstract

In this study, a potential ecological risk index for site dynamic risk evolution was proposed with the development trend of the Hakanson approach. The possibility factor P_i was attached to the contamination factor C_fⁱ, representing the burst probability factor of dynamic risk arising from the transformation of metal(loid) fractions, ascertained by the delayed geochemical hazard (DGH) methodology. The toxic effects of different elements were explored through a meta-analysis. The effects of soil pH and soil organic matter on the mobile fraction of elements were examined, and the toxic factors (Trⁱ) of six elements (arsenic, cadmium, chromium, copper, lead, and zinc) were modified for the site application. A total of 16 case studies representing four soil types (agricultural soil, industrial zone, mining area, and soil of river basin) were tested, and the results indicated that the proposed index could provide an early warning of site risk dynamics.

Keywords: DGH model; Meta-analysis; Potential ecological risk index; Risk dynamic evolution index; Site risk assessment.