Concentrations of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), and polybrominated diphenyl ethers (PBDEs) in air and soil, their fugacities, and the experimental soil-air partitioning coefficient (KSA) were determined at two background sites in the Gt. Hungarian Plain in August 2013. The concentrations of the semivolatile organic compounds (SOCs) in the soil were not correlated with the organic carbon content but with two indirect parameters of mineralization and aromaticity, suggesting that soil organic matter quality is an important parameter affecting the sorption of SOCs onto soils. Predictions based on the assumption that absorption is the dominant process were in good agreement with the measurements for PAHs, OCPs, and the low chlorinated PCBs. In general, soils were found to be a source of PAHs, high chlorinated PCBs, the majority of OCPs and PBDEs, and a sink for the low chlorinated PCBs and γ-hexachlorocyclohexane. Diurnal variations in the direction of the soil-air exchange were found for two compounds (i.e., pentachlorobenzene and p,p'-dichlorodiphenyldichloroethane), with volatilization during the day and deposition in the night. The concentrations of most SOCs in the near-ground atmosphere were dominated by revolatilization from the soil.
- MeSH
- Atmosphere MeSH
- Chlorobenzenes analysis MeSH
- Hydrocarbons, Chlorinated analysis MeSH
- Hexachlorocyclohexane analysis MeSH
- Soil Pollutants analysis MeSH
- Air Pollutants analysis MeSH
- Environmental Monitoring MeSH
- Pesticides analysis MeSH
- Polychlorinated Biphenyls analysis MeSH
- Polycyclic Aromatic Hydrocarbons analysis MeSH
- Soil chemistry MeSH
- Volatile Organic Compounds analysis MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Geographicals
- Hungary MeSH
The concentrations and congener profiles of polychlorinated benzenes, phenols, dibenzo-p-dioxin and dibenzofurans, measured in raw flue gases of a real MSWI plant, are discussed in this paper. The data covers steady-state and transient operation conditions, including the memory effect period close to two shutdowns. The highest levels of concentrations of the pollutants were observed the first day after the shutdown with subsequent gradual decrease towards steady-state values. The conditions of the steady-state period prior to shutdown are decisive for the increase of start-up values, memory effect values and memory effect length. We found that the above-mentioned pollutants had a different length of the memory effect period. It can be concluded that under plant transient operation the formation of pollutants by the de novo synthesis is higher than under steady-state conditions.
- MeSH
- Benzofurans analysis MeSH
- Chlorobenzenes analysis MeSH
- Chlorophenols analysis MeSH
- Air Pollutants analysis MeSH
- Environmental Monitoring MeSH
- Gases chemistry MeSH
- Polychlorinated Dibenzodioxins analogs & derivatives analysis MeSH
- Incineration * MeSH
- Publication type
- Journal Article MeSH
- Geographicals
- Czech Republic MeSH
[On the question of human exposure to hexachlorobenzene]
