Title: | "Proximity to chemical equilibria among air, water, soil, and sediment as varied with partition coefficients: A case study of polychlorinated dibenzodioxins/furans, polybrominated diphenyl ethers, phthalates, and polycyclic aromatic hydrocarbons" |
Address: | "Department of Environmental Planning & Environmental Planning Institute, Graduate School of Environmental Studies, Seoul National University, Seoul 08826, South Korea. Department of Environmental Planning & Environmental Planning Institute, Graduate School of Environmental Studies, Seoul National University, Seoul 08826, South Korea. Electronic address: leeds@snu.ac.kr" |
DOI: | 10.1016/j.scitotenv.2019.03.286 |
ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
Abstract: | "To capture the pollutant distribution status among environmental media and to understand how the distribution varies with the pollutants' properties, we assessed a total of 225 fugacity ratios (FRs) of 45 semi-volatile organic compounds (SVOCs) (polychlorinated dibenzo-p-dioxins/furans (PCDDs/Fs), polybrominated diphenyl ethers (PBDEs), phthalates, and polycyclic aromatic hydrocarbons (PAHs)) for five medium pairs (air-water, air-soil, water-sediment, soil-water, and soil-sediment) using the nationwide multimedia monitoring data. For many of the pollutants, fugacity was greatest in air (PCDFs and 6 heavy PAHs) and in sediment (PBDEs and 9 light PAHs) while lowest in soil for most of the pollutants. PAHs and phthalates appeared to be farther away from equilibrium than PCDDs/Fs and PBDEs. The ratios of 'equilibrium improbable' FRs to all the FRs in each chemical group were 2%, 0%, 33.3%, and 28.9% for PCDDs/Fs, PBDEs, phthalates, and PAHs, respectively. FR(water/air) of PAHs, FR(soil/air), and FR(sediment/water) of the pollutant groups (except for PBDEs) decreased significantly (p?ª+ª+0.01) with the partition coefficients, 1/K(air/water) (1/K(aw)), K(octanol/air) (K(oa)), and K(octanol/water) (K(ow)), respectively, even in the field conditions. The findings on FRs values provide valuable clues to identifying the media that would act as sink or source for certain chemicals and to using a more appropriate choice in the coherence test of environmental quality objectives, which should be important considerations in the management of chemical contamination in the environment" |
Keywords: | Chemical equilibrium Fugacity ratio Multimedia Partition coefficient SVOCs; |
Notes: | "PubMed-not-MEDLINEKim, Hee Seok Lee, Dong Soo eng Netherlands 2019/03/29 Sci Total Environ. 2019 Jun 20; 670:760-769. doi: 10.1016/j.scitotenv.2019.03.286. Epub 2019 Mar 20" |