Bacterial methylmercury degradation in Florida Everglades peat sediment

Article Abstract:

Investigations into the bacterial methylmercury degradation in the Florida Everglades showed that bacterial degradation of methylmercury used the oxidative demethylation mechanism. Nitrate-respriring bacteria was responsible for the first stage of the demethylation process and degradation was found to be effective in pristine areas than the eutrophied areas. The process of oxidative demethylation was shown to be dominated by sulfate reducers and methanogenic bacteria.

Everglades, Sulfur bacteria, Peat-bogs, Peat bogs

---

Bioavailability of inorganic and methylmercury to a marine deposit-feeding polychaete

Article Abstract:

Investigations into the assimilation efficiency of the marine polychaete Nereis succinea of inorganic mercury and methylmercury showed that the marine polychaete assimilated methylmercury more than inorganic mercury. The ability of Nereis to assimilate methylmercury was found to be dependent on substrate composition and registered an assimilation efficiency of between 43% to 83%. The assimilation efficiency as found to be consistent in both anoxic and oxic sediments.

Polychaeta, Polychaetes, Benthos, Benthic zone

---

Bioavailability of sediment-bound methyl and inorganic mercury to a marine bivalve

Article Abstract:

The bioaccumulation of methyl and inorganic mercury in the marine bivalve Mytilus edulis was examined by radioactive labelling of methylmercury and inorganic mercury in different sediment substrates. Results showed a higher accumulation of methyl mercury by the mussels. This is hypothesized to be due to the relationship of methyl mercury with suspended particles and the organic coating which enables mercury to be more readily assimilated.

Research and Development in the Physical, Engineering, and Life Sciences, Waste Management and Remediation Services, Water Pollution Control R&D, Toxic Substances Control, Usage, Pollution, Poisons, Pollution control, Marine sediments, Bioaccumulation, Water pollution research, Mytilus edulis, Blue mussel, Radioactive tracers, Mercury metabolism

Similar abstracts:

• Abstracts: Historical input and degradation of toxaphene in Lake Ontario sediment. Is the Hyde Park Dump, near the Niagara River, still affecting the sediment of Lake Ontario?
• Abstracts: Predictive model for estimating the extent of petroleum hydrocarbon biodegradation in contaminated soils. Crude oil hydrocarbon bioremediation and soil ecotoxicity assessment
• Abstracts: Irreversible adsorption of naphthalene and tetrachlorobiphenyl to Lula and surrogate sediments. Development of a surrogate sediment to study the mechanisms responsible for adsorption/desorption hysteresis
• Abstracts: Dark and photoassisted Fe3+-catalyzed degradation of chlorophenoxy herbicides by hydrogen peroxide. Reduction of perchloroalkanes by ferrioxalate-generated carboxylate radical preceding mineralization by the photo-Fenton reaction
• Abstracts: Reducing methyl bromide emission with a high barrier plastic film and reduced dosage. Design, fabrication, and application of a dynamic chamber for measuring gas emissions from soil

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.