NDLI: Relative contributions of mercury bioavailability and microbial growth rate on net methylmercury production by anaerobic mixed cultures.

Please wait, while we are loading the content...

Year: 2017 Volume: 19

Year: 2016 Volume: 18

Year: 2015 Volume: 17

Year: 2015 Volume: 17 Issue: 12

Year: 2015 Volume: 17 Issue: 11

Year: 2015 Volume: 17 Issue: 10

Year: 2015 Volume: 17 Issue: 9

Comparative adsorption of Eu(III) and Am(III) on TPD.

Environmental water body characteristics in a major tributary backwater of the unique and strongly seasonal Three Gorges Reservoir, China.

Relative contributions of mercury bioavailability and microbial growth rate on net methylmercury production by anaerobic mixed cultures.

Effects of thermophilic composting on oxytetracycline, sulfamethazine, and their corresponding resistance genes in swine manure.

Pathways for degradation of plastic polymers floating in the marine environment.

Annual air pollution caused by the Hungry Ghost Festival.

Particle emissions from microalgae biodiesel combustion and their relative oxidative potential.

Evaluation of exposure to organophosphate, carbamate, phenoxy acid, and chlorophenol pesticides in pregnant women from 10 Caribbean countries.

Plutonium partitioning in water-granite and water- -FeOOH systems: from a viewpoint of a three-phase system.

Occurrence, distribution and risks of antibiotics in urban surface water in Beijing, China.

Oxygen profiling of the unsaturated zone using direct push drilling.

The weathering and transformation process of lead in China's shooting ranges.

Application of mechanochemistry to metal recovery from second-hand resources: a technical overview.

Reduced inorganic sulfur in surface sediment and its impact on benthic environments in offshore areas of NE China.

Chromatographic methods for the isolation, separation and characterisation of dissolved organic matter.

A first look at the influence of anthropogenic climate change on the future delivery of fluvial sediment to the Ganges-Brahmaputra-Meghna delta.

Year: 2015 Volume: 17 Issue: 8

Year: 2015 Volume: 17 Issue: 7

Year: 2015 Volume: 17 Issue: 6

Year: 2015 Volume: 17 Issue: 5

Year: 2015 Volume: 17 Issue: 4

Year: 2015 Volume: 17 Issue: 3

Year: 2015 Volume: 17 Issue: 2

Year: 2015 Volume: 17 Issue: 1

Year: 2014 Volume: 16

Year: 2013 Volume: 15

Relative contributions of mercury bioavailability and microbial growth rate on net methylmercury production by anaerobic mixed cultures.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kucharzyk, Katarzyna H. Deshusses, Marc A. Porter, Kaitlyn A. Hsu-Kim, Heileen
Description	Country affiliation: United States Author Affiliation: Kucharzyk KH ( Duke University, Department of Civil and Environmental Engineering, 121 Hudson Hall, Durham, NC 27708, USA. hsukim@duke.edu.)
Abstract	Monomethylmercury (MeHg) is produced in many aquatic environments by anaerobic microorganisms that take up and methylate inorganic forms of Hg(II). Net methylation of Hg(II) appears to be correlated with factors that affect the activity of the anaerobic microbial community and factors that increase the bioavailability of Hg(II) to these organisms. However, the relative importance of one versus the other is difficult to elucidate even though this information can greatly assist remediation efforts and risk assessments. Here, we investigated the effects of Hg speciation (dissolved Hg and nanoparticulate HgS) and microbial activity on the net production of MeHg using two mixed microbial cultures that were enriched from marine sediments under sulfate reducing conditions. The cultures were amended with dissolved Hg (added as a dissolved nitrate salt) and nanoparticulate HgS, and grown under different carbon substrate concentrations. The results indicated that net mercury methylation was the highest for cultures incubated in the greatest carbon substrate concentration (60 mM) compared to incubations with less carbon (0.6 and 6 mM), regardless of the form of mercury amended. Net MeHg production in cultures exposed to HgS nanoparticles was significantly slower than in cultures exposed to dissolved Hg; however, the difference diminished with slower growing cultures with low carbon addition (0.6 mM). The net Hg methylation rate was found to correlate with sulfate reduction rate in cultures exposed to dissolved Hg, while methylation rate was roughly constant for cultures exposed to nanoparticulate HgS. These results indicated a potential threshold of microbial productivity: below this point net MeHg production was limited by microbial activity, regardless of Hg bioavailability. Above this threshold of productivity, Hg speciation became a contributing factor towards net MeHg production.
File Format	HTM / HTML
ISSN	20507887
e-ISSN	20507895
DOI	10.1039/c5em00174a
Journal	Environmental Science: Processes & Impacts
Issue Number	9
Volume Number	17
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2015-09-01
Publisher Place	Great Britain (UK)
Access Restriction	Open
Subject Keyword	Discipline Environmental Health Mercury Metabolism Methylmercury Compounds Water Microbiology Water Pollutants, Chemical Anaerobiosis Geologic Sediments Chemistry Microbiology Methylation Nanoparticles Research Support, N.i.h., Extramural Research Support, U.s. Gov't, Non-p.h.s.
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Mercury methylation by a microbial community from sediments of the Adour Estuary (Bay of Biscay, France).

Biogeochemical factors influencing net mercury methylation in contaminated freshwater sediments from the St. Lawrence River in Cornwall, Ontario, Canada.

Influence of a chlor-alkali superfund site on mercury bioaccumulation in periphyton and low-trophic level fauna.

Environmental formation of methylmercury is controlled by synergy of inorganic mercury bioavailability and microbial mercury‐methylation capacity

Impacts of Forest Fire Ash on Aquatic Mercury Cycling

Indicators of sediment and biotic mercury contamination in a southern New England estuary.

Temporal changes in the distribution, methylation, and bioaccumulation of newly deposited mercury in an aquatic ecosystem.

Assessment of mercury bioavailability to benthic macroinvertebrates using diffusive gradients in thin films (DGT).

Mercury Methylation Genes Identified across Diverse Anaerobic Microbial Guilds in a Eutrophic Sulfate-Enriched Lake.

Relative contributions of mercury bioavailability and microbial growth rate on net methylmercury production by anaerobic mixed cultures.

Similar Documents

Mercury methylation by a microbial community from sediments of the Adour Estuary (Bay of Biscay, France).

Biogeochemical factors influencing net mercury methylation in contaminated freshwater sediments from the St. Lawrence River in Cornwall, Ontario, Canada.

Influence of a chlor-alkali superfund site on mercury bioaccumulation in periphyton and low-trophic level fauna.

Environmental formation of methylmercury is controlled by synergy of inorganic mercury bioavailability and microbial mercury‐methylation capacity

Impacts of Forest Fire Ash on Aquatic Mercury Cycling

Indicators of sediment and biotic mercury contamination in a southern New England estuary.

Temporal changes in the distribution, methylation, and bioaccumulation of newly deposited mercury in an aquatic ecosystem.

Assessment of mercury bioavailability to benthic macroinvertebrates using diffusive gradients in thin films (DGT).

Mercury Methylation Genes Identified across Diverse Anaerobic Microbial Guilds in a Eutrophic Sulfate-Enriched Lake.

Relative contributions of mercury bioavailability and microbial growth rate on net methylmercury production by anaerobic mixed cultures.