Batch test for assessing the mineralization of 14C-radiolabeled compounds under realistic anaerobic conditions

Article Abstract:

A batch test system was developed for the analysis of radiolabelled carbon dioxide and methane evolution in anaerobic matrices. The batch test system is composed of nitrogen and oxygen flow controllers, sample vessels, water bath, check valves and Lindberg tube furnace. The system was utilized for the gas trapping of CO2 and CH4 with an average recovery of 97.1% for CO2 and 95.8% for CH4. The test system was also utilized for the detection of C-labeled gases from glucose and palmitic acid.

Chemical evolution, Molecular evolution, Radioactive tracers

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Estimates of spatial extent of sediment toxicity in major U.S. estuaries

Article Abstract:

The levels of toxic substances in sediments collected from 22 estuarine sites were analyzed by 10-day marine amphipod survival tests, microbial bioluminescence and sea urchin fertilization tests. Amphipod survival tests of the samples ranged from 0.0% in 11 sites to 85.0% in Newark Bay, NJ,. Furthermore, amphipod survival tests indicated the presence of lethal levels of toxic substances in 10.9% of the samples that were taken from the 22 estuaries.

Waste Management and Remediation Services, Water Pollution NEC, Environmental aspects, Water pollution, Pollutants, Estuarine sediments, Estuarine pollution, Newark Bay

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Surrogate parameter for the baseline toxicity content of contaminated water: simulating the bioconcentration of mixtures of pollutants and counting molecules

Article Abstract:

The total baseline toxicity content in water samples was estimated using a new procedure for simulating the biotic burden of a mixture of pollutants. The new method is simple and it uses C18-Empore disks and vapor pressure osometry. It is shown that the technique is effective for estimating the influence of baseline toxicity to the overall toxicity of surface waters and effluents.

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