scholarly journals Total mercury in the night shark, Carcharhinus signatus in the western equatorial Atlantic Ocean

2004 ◽  
Vol 47 (4) ◽  
pp. 629-634 ◽  
Author(s):  
Alexandre Gomes Ferreira ◽  
Vicente Vieira Faria ◽  
Carlos Euardo Veiga de Carvalho ◽  
Rosangela Paula Teixeira Lessa ◽  
Francisco Marcante Santana da Silva
Keyword(s):  
Atlantic Ocean ◽  
Total Mercury ◽  
Atomic Emission ◽  
World Health ◽  
Human Consumption ◽  
Equatorial Atlantic ◽  
Daily Ingestion ◽  
Equatorial Atlantic Ocean ◽  
High Concentrations ◽  
Health Organization

Mercury is the only element capable to biomagnificate along the food chain, and carnivorous fish tend to accumulate high concentrations of this element. Total mercury in muscle tissue of Carcharhinus signatus sampled along the western equatorial Atlantic Ocean was measured by atomic emission spectrophotometry with ICP/AES. The average total mercury concentrations were consistently greater than the maximum limit for human consumption established by the Brazilian Health Ministry for carnivorous fishes (1000 µg. kg-1 w.w.). Therefore, an average consumption of 0.1 kg/day of C. signatus would result in an average daily ingestion of 174.2 µg of Hg, more than five times the 30 µg/day intake established by the World Health Organization. In the range of lengths studied, body length could not be used as an indicator of the Hg contamination degree for C. signatus. Also, sex cannot be considered a determining factor in the total mercury accumulation in C. signatus.

scholarly journals HEAVY METAL CONTENT IN SOME SEAFOODS COLLECTED FROM MUARA ANGKE FISH AUCTION PLACE, JAKARTA.

1987 ◽  
Vol 26 ◽  
pp. 51-58
Author(s):  
Horas Hutagalung ◽  
Suwirma Syamsu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Content ◽  
Heavy Metal Content ◽  
World Health ◽  
Human Consumption ◽  
Zn Content ◽  
Standard Set ◽  
Health Organization

Determination of  heavy  metal  content  (Hg, Pb, Cd, Cu, Cr, Zn) in some seafoods collected from  Muara  Angke  Fish  Auction  Place  were carried out during February to July 1979. The results showed  that Zn  content  in seafoods a nalyzed  was always much higher than the other heavy metals. The concentration levels of  the  six  heavy  metals observed were low. It is almost of the same level as the metal concentration of  other  seafoods  observed  in various parts of the world oceans, but still lower  than the maximum standard set  for human  consumption  as  established  by   Tasmania, Australia and  World Health Organization. The  mean  per capita  consumption of  fish  in Jakarta is only  about 165 g  per week, while  the  Provisional Tolerated Weekly Intake for Hg, set by WHO/FAO at 300 ug level, would be attained by consuming 1500 g Rastrelliger sp., or 698 gPenaeus setiferus, or 545 g Sepia sp., and or 1250 g Pecten sp.  Therefore,  at   present the  level of metal content in fishes sold at TPI  Muara  Angke  can be  considered  as  not  dangerous  to human health as long as these quantities are not surpassed.

scholarly journals Análise geoquímica das águas subterrâneas no município de Boquira, no semiárido baiano - Brasil

2021 ◽  
Vol 35 (1) ◽  
pp. 7-16
Author(s):  
Maria da Conceição Gomes ◽  
Danilo Melo ◽  
Maíra da Costa ◽  
José Ângelo dos Anjos ◽  
Michael Trinta ◽  
...  
Keyword(s):  
Geochemical Modeling ◽  
Saturation Index ◽  
World Health ◽  
Human Consumption ◽  
Alluvial Deposits ◽  
Environmental Liabilities ◽  
Lead Zinc ◽  
Ionic Relations ◽  
Semi Arid Region ◽  
Health Organization

The geochemical analysis was carried out in the center-south portion of the state of Bahia, in the semi-arid region of Bahia, where outcrop the Paramirim Complex, Boquira Unit, Boquira Granite, Veredinha Granite, Serra do Espinhaço, detritus coverings and alluvial deposits. The Boquira Unit is known for lead-zinc mineralization. In this unit operated the Boquira mine, considered the largest lead and zinc mine in Brazil, until it was suddenly abandoned, leaving significant environmental liabilities of toxic metals such as lead, zinc, silver, barium, copper, chromium and nickel. To characterize the groundwater 16 physical-chemical parameters from 24 wells were used, obtained from the Water and Sanitation Engineering Company of Bahia - CERB. Its classification was made in the Piper Diagram and the ionic relations in meq/L. To evaluate the quality of the water we used the Consolidation Ordinance no 5/2017 of the Ministry of Health and World Health Organization. With the PHREEQC 3.5 hydrochemical model, the saturation index of the analyzed elements was calculated. The results showed predominance of calcium chloride waters (71% of the samples), with ionic relations of type rCa2+> rMg2+>rNa+ and rCl->rHCO3->rSO42+. Geochemical modeling indicated calcite (CaCO3), dolomite (CaMg(CO3)2) and quartz (SiO2) as the main minerals with a tendency to precipitation. The first two were associated with the dissolution of the Boquira Unit carbonates and the third one with the quartzites of the Serra do Espinhaço Formation. The concentrations of calcium and chloride showed 54% and 25% of the samples above the Maximum Allowable Value for human consumption, respectively, representing a risk factor to the health of the population in the area.

scholarly journals Assessment of Mycological Quality of Groundwater in Yenagoa Metropolis, Bayelsa State, Nigeria

2021 ◽  
pp. 76-81
Author(s):  
Glory Richard ◽  
Ebinyo Rebecca Aseibai
Keyword(s):  
Potable Water ◽  
Appropriate Technology ◽  
World Health ◽  
Human Consumption ◽  
Statistical Variation ◽  
Total Fungi ◽  
Health Organization ◽  
Microbiological Procedures ◽  
Agricultural Organization

This study examined the mycological quality of groundwater in Yenagoa metropolis, Bayelsa State, Nigeria. Triplicate water samples were obtained from 8 locations in the metropolis, and the fungi quality analyzed following standard microbiological procedures. Results showed that total fungi density ranged from 5.2±1.00 x102 to 8.50±0.56 x103 CFU/ml. Analysis of variance indicates statistical variation (p=0.001) across locations with total fungi density exceeding the limit of 102 CFU/ml specified by World Health Organization/Food and Agricultural Organization for potable water in 62.50% of samples. Eight fungi isolates (species) were identified in the study with frequency across the locations as follows: Aspergillus flavus (20.59%), Aspergillus fumigatus (20.59%), Aspergillus niger (20.59%), Cladosporum (5.88%), Fusarium (2.94%), Mucor (8.82%), Penicilium (14.71%) and Rhizopus (5.88%). Of these, Aspergillus species were predominant across the locations. Since groundwater meets diverse purposes, it is essential that it is suitable for the desired use, and this can be done using appropriate technology to make groundwater potable for human consumption.

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