Is total mercury concentration a good predictor of methyl mercury concentration in aquatic systems?

1995 ◽  
Vol 80 (1-4) ◽  
pp. 715-724 ◽  
Author(s):  
Carol A. Kelly ◽  
John W. M. Rudd ◽  
Vincent L. St.Louis ◽  
Andrew Heyes
Keyword(s):  
Mercury Concentration ◽  
Methyl Mercury ◽  
Good Predictor ◽  
Total Mercury ◽  
Aquatic Systems ◽  
Total Mercury Concentration

Polar microbes and their implications in the aquatic mercury cycle

2020 ◽  
Author(s):  
Céline Lavergne ◽  
Lars-Eric Heimburger ◽  
Patricia Bovio-Winkler ◽  
Rolando Chamy ◽  
Léa Cabrol
Keyword(s):  
Mercury Concentration ◽  
Total Mercury ◽  
Inorganic Mercury ◽  
Atmospheric Mercury ◽  
Aquatic Systems ◽  
Tierra Del Fuego ◽  
South Shetland Islands ◽  
P Value ◽  
Beaver Ponds ◽  
Total Mercury Concentration

<p>The methylmercury has the feature, in addition to its high toxicity for living organisms, to be easily incorporated, bioaccumulated and biomagnified through the food web in aquatic systems. Recently, the microorganisms implicated in the transformation of mercury to methylmercury have been found much more diverse than previously thought. Among them, 9 methanogenic Archaea strains are able to methylate the mercury in pure culture. However, few proofs exist <em>in situ</em> in polar aquatic systems. Antarctic polar regions receive atmospheric mercury through long-range transport of foreign emissions. In a context of increasing releases of heavy metals in aquatic environments and atmosphere, it is a crucial objective to elucidate the fate of mercury in Antarctic polar aquatic ecosystems and the role Archaea could play in mercury transformations. Hence, microbial diversity was investigated in pristine Antarctic lakes (South Shetland Islands, Antarctic, Chile) and continental sub-Antarctic beaver ponds (Tierra del Fuego, Chile) where benthic total mercury concentration was 14 ±6.5 and 89 ±13 ppm, respectively. Until 6.3% of the active community could be constituted by putative methylators and a positive significant correlation was found between total mercury concentration and putative methylator relative abundance (linear model, p-value=0.001). Putative methylator Archaea <em>Methanoregula</em> and <em>Methanosphaerula</em> have been detected but did not seem active in the studied ecosystems (RNA metabarcoding VS DNA metabarcoding).</p><p>Combined with these molecular data, mercury methylation and methylmercury demethylation activities were performed by addition of enriched stables isotopes of inorganic mercury and methylmercury, respectively and we expect to find highest methylation rates in the rich-organic matter ecosystems such as sub-Antarctic beaver ponds.</p>

Determination of total mercury concentration in aqueous samples with gold nanoparticles

2014 ◽  
Vol 6 (4) ◽  
pp. 1254 ◽  
Author(s):  
J. S. Crosby ◽  
J. Z. James ◽  
D. Lucas ◽  
C. P. Koshland
Keyword(s):  
Gold Nanoparticles ◽  
Mercury Concentration ◽  
Total Mercury ◽  
Aqueous Samples ◽  
Total Mercury Concentration

scholarly journals Mercury content in the wool of domestic animals in Cherepovets

2018 ◽  
Vol 7 (3) ◽  
pp. 19-23
Author(s):  
Ekaterina Sergeevna Bachina ◽  
Olga Yurievna Rumiantseva ◽  
Elena Sergeevna Ivanova ◽  
Viktor Trofimovic Komov ◽  
Marina Andreevna Guseva ◽  
...  
Keyword(s):  
Mercury Concentration ◽  
Statistical Difference ◽  
Total Mercury ◽  
Domestic Animals ◽  
Mercury Content ◽  
Average Content ◽  
Comparison Analysis ◽  
Vologda Region ◽  
Total Mercury Concentration ◽  
Mercury Analyzer

Mercury (Hg) and its compounds are considered as one of the ten major dangerous groups of chemicals. The content of mercury in the coat was 136 cats and 113 dogs in the territory of the Vologda Region in Cherepovets. The total mercury concentration in the wool samples was measured on a mercury analyzer RA-915 +. The values of the mercury index in cats range from less than 0,001 mg / kg to 13,00 mg / kg, in dogs from less than 0,001 mg / kg to 1,858 mg / kg. Statistical difference in the content of mercury in wool between cats and dogs was revealed. The Hg content in cats is 3,5 times higher than the dogs have. Comparison analysis showed the concentration of mercury in the wool of cats and dogs have no statistically significant differences. The authors noted that cats had 4 times more mercury who ate fish. The average content of Hg in the wool of dogs is slightly different for those who ate fish.

Total mercury concentration in two marine fish species, mackerel (Scomberomorus sp.) and snapper (Lutjanus sp.), from several Mexican fishing ports

2018 ◽  
Vol 25 (14) ◽  
pp. 13894-13905
Author(s):  
Martha Elena Ramírez-Islas ◽  
Alejandro De la Rosa-Pérez ◽  
Fabiola Altuzar-Villatoro ◽  
Patricia Ramírez-Romero
Keyword(s):  
Marine Fish ◽  
Fish Species ◽  
Mercury Concentration ◽  
Total Mercury ◽  
Marine Fish Species ◽  
Total Mercury Concentration

Species differences in total mercury concentration in gulls from the Gulf of Gdansk (Southern Baltic)

2016 ◽  
Vol 33 ◽  
pp. 100-109 ◽  
Author(s):  
Emilia Szumiło-Pilarska ◽  
Agnieszka Grajewska ◽  
Lucyna Falkowska ◽  
Julia Hajdrych ◽  
Włodzimierz Meissner ◽  
...  
Keyword(s):  
Mercury Concentration ◽  
Total Mercury ◽  
Species Differences ◽  
Gulf Of Gdańsk ◽  
Total Mercury Concentration ◽  
Gulf Of Gdansk ◽  
Southern Baltic

Total mercury concentration in the fur of free-ranging giant otters in a large Neotropical floodplain

2020 ◽  
pp. 110483
Author(s):  
Grazielle Soresini ◽  
Fabiano Aguiar da Silva ◽  
Caroline Leuchtenberger ◽  
Guilherme Mourão
Keyword(s):  
Mercury Concentration ◽  
Total Mercury ◽  
Total Mercury Concentration ◽  
Neotropical Floodplain ◽  
Free Ranging
Sign in / Sign up

Export Citation Format

Share Document