Rapidly desorbing fractions of PAHs in contaminated sediments as a predictor of the extent of bioremediation

Article Abstract:

The rapidly desorbing and readily degraded polycyclic aromatic hydrocarbons (PAH) fractions were compared in a study in order to test the conjecture that slow desorption is the cause of limited biodegradation. If the first hypothesis is proven correct, the study further sought to investigate, if the first hypothesis is proven, to what extent the feasibility of bioremediation of a specific sediment of soil can be predicted from the measurement of desorption kinetics. The study determined the desorption kinetics of 15 PAHs from sediments before and after bioremediation in a bioreactor or landfarm. The magnitude of the rapidly desorbing fractions of the nondegraded PAHs indicates that their persistence not a result of bioavailability, but instead due to microbial factors.

Comment:

Netherlands: Desorption kinetics of several PAHs were measured to verify if slow desorption causes limited biodegradation

Netherlands, Science & research, Waste Management and Remediation Services, Water Pollution, Article

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Heavy metal and hydrocarbon pollution in recent sediments from Southampton Water, Southern England: a geochemical and isotopic survey

Article Abstract:

A study of the sediment core from Southampton Water in Southern England revealed a rapid increase in sedimentation rate following the expansion of the Fawley oil refinery in 1949-1951. Dredging activities, industrial expansion and residential development in the area in 1950-1951 further increased sedimentation rate and eventually raised the concentration of heavy metals in the sediment core to alarming levels. A radiochronology of lead isotopes ratios of the trace elements indicated the presence of 'ancient' lead component in the sediments.

Analysis, Environmental aspects, Southampton, England, Estuarine sediments, Petroleum refineries

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