Authors:Kalman Buzas, Peter Budai, and Adrienne Clement
One and a half year long field sampling was established in order to evaluate the contamination of storm water runoff. The event means (EMC) total petroleum hydrocarbons (TPH) concentration of the runoff was a function of the actual traffic intensity and the rainfall depth. It was concluded that this TPH, of which dominant component is the engine-oil (characteristically C28) does not form an ‘oil-in-water’ type emulsion in the condition of normal motorway-operation, but is interlocked to asphalt, rubber and soot particles of maximum some ten microns size. This condition influences the possibility, way and extent of separation alike. The separation equipments and their sizing applied so far are not suitable to achieve efficient surface water protection. Practical prevention method of accidental type environment pollution was also suggested. On the basis of the international literature evaluation, technical solutions capable to decrease the runoff pollution were summarized. Among these, useful calculation method was developed for designers to determine the sufficient storage capacity (water quality volume) of reservoirs applied for water quality protection. Monitoring technique of runoffs, which are characterized time dependent, variable pollutant concentrations by their nature, was proposed. It was stated that the administrative regulation should aim at the EMC instead of current concentration. Beside TPH information was gained on polycyclic aromatic hydrocarbons (PAHs), suspended solids, heavy metals, pH, and nutrient (N, P) pollution of the runoff, which are valuable for the grounding of further research results.
Risk assessments and remediation plans of hydrocarbon-contaminated sites usually have been managed based on total petroleum hydrocarbon (TPH) content. Gasoline is one of the most mobile pollution agents, which consist mainly of light hydrocarbons. Measuring of TPH does not give enough information about the individual compounds. Another problem is using solvents such as n-hexane for extraction. In some cases we would like to know about the hydrocarbon-adsorption properties of contaminated samples. The article describes a laboratory model for hydrocarbon contamination modeling, and measuring hydrocarbon sorption properties. For modeling the authors have chosen gasoline type hydrocarbon, homogeneous sand and clay samples from the Kiscell Clay Formation. Results of the modeling indicate that the referenced ATD-GC/MS method can be a very effective tool in the risk assessment of hydrocarbon-contaminated areas.
Authors:Ágnes Erdeiné Kis, Krisztián Laczi, Szilvia Zsíros, Péter Kós, Roland Tengölics, Naila Bounedjoum, Tamás Kovács, Gábor Rákhely, and Katalin Perei
had stably existed there for decades (since 1980s). Prior to bioremediation, the total hydrocarbon concentration was 670 mg/kg soil. “Freshly” contaminated soil was modeled by artificial addition of diesel oil to soil up to totalpetroleumhydrocarbon