scholarly journals Climate and productivity affect total mercury concentration and bioaccumulation rate of fish along a spatial gradient of subarctic lakes

2018 ◽  
Vol 637-638 ◽  
pp. 1586-1596 ◽  
Author(s):  
Salla A. Ahonen ◽  
Brian Hayden ◽  
Jaakko J. Leppänen ◽  
Kimmo K. Kahilainen
Keyword(s):  
Mercury Concentration ◽  
Total Mercury ◽  
Spatial Gradient ◽  
Subarctic Lakes ◽  
Total Mercury Concentration

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

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>

scholarly journals Total mercury pathways from artisanal and small-scale gold mining in Sukabumi using system dynamics model

2021 ◽  
Vol 896 (1) ◽  
pp. 012048
Author(s):  
A Sunaryani ◽  
Y S Ridwan
Keyword(s):  
System Dynamics ◽  
Mercury Concentration ◽  
Gold Mining ◽  
Total Mercury ◽  
The Body ◽  
Small Scale ◽  
System Dynamics Model ◽  
Top Predator ◽  
Dynamics Model ◽  
Total Mercury Concentration

Abstract Artisanal and small-scale gold mining (ASGM) has been operated in Sukabumi District, West Java, Indonesia, for more than two decades. ASGM uses mercury in a ball mill gold ore processing, and the waste is released into the environment during and after this process. Previous studies have found that mercury-contaminated water, air, sediments, soil, and aquatic biota. This study aimed to predict and analyze total mercury pathways from ASGM in the air, water, sediment, fish, and humans using a system dynamics model. The results showed that the total mercury concentration in water was low and still meets the standard, while the total mercury concentration in sediment had already exceeded the standard. Biomagnification occurred to plankton feeder fish and top predator fish, but still below the level of tolerance mercury. Mercury levels in top predator fish and humans take a long time to exceed the standard (77 and 67 months after entering the body, respectively). The percentage error of 17.67% compared to the experimental data showed that the prediction of the developed system dynamics model is acceptable. Therefore, the model can be used to predict the total mercury pathways in the environment, especially in the ASGM area.

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