scholarly journals Dredging Activities Carried Out in a Brazilian Estuary Affect Mercury Levels in Swimming Crabs

2020 ◽  
Vol 17 (12) ◽  
pp. 4396
Author(s):  
Paloma de Almeida Rodrigues ◽  
Rafaela Gomes Ferrari ◽  
Rachel Ann Hauser-Davis ◽  
Luciano Neves dos Santos ◽  
Carlos Adam Conte-Junior
Keyword(s):  
Total Mercury ◽  
Abiotic Factors ◽  
Human Consumption ◽  
Consumer Health ◽  
Swimming Crab ◽  
Health Issues ◽  
Guanabara Bay ◽  
Direct Mercury Analyzer ◽  
Mercury Analyzer

(1) Although suffers from intense pollution inputs, Guanabara Bay, the most socioeconomically and environmentally important estuary in Rio de Janeiro, Brazil, is still home to a diverse fauna, including several fish and crab species consumed by humans. The bay presents high sedimentation rates and sediment contamination, further aggravated by dredging processes carried out in recent years. In this context, this study aimed to verify the effect of the dredging process on total mercury (THg) concentrations at Guanabara Bay through swimming crab assessments sampled before (2016), during (2017), and after (2018) the dredging process, and mainly, if the detected concentrations can be harmful to consumer health; (2) Methods: Swimming crab samplings were carried out at the same time and sampling points in 2016, 2017 and 2018 and the total Hg was determined using a Direct Mercury Analyzer (DMA-80, Milestone, Bergamo, Italy); (3) Results: Increased Hg concentrations were observed during the dredging process, decreasing to lower values, close to the initial concentrations, at the end of the process. Some of the investigated abiotic factors favor Hg dynamics in the aquatic environment, while others were positively altered at some of the assessed sampling areas at the end of the dredging process; (4) Conclusions: Although crab Hg levels were below maximum permissible limits for human consumption, it is important to note that these animals are significantly consumed around Guanabara Bay, which may lead to public health issues in the long term.

scholarly journals Hg Levels in Marine Porifera of Montecristo and Giglio Islands (Tuscan Archipelago, Italy)

2020 ◽  
Vol 10 (12) ◽  
pp. 4342
Author(s):  
Camilla Roveta ◽  
Daniela Pica ◽  
Barbara Calcinai ◽  
Federico Girolametti ◽  
Cristina Truzzi ◽  
...  
Keyword(s):  
National Park ◽  
Total Mercury ◽  
Additional Data ◽  
Dry Weight ◽  
Mercury Content ◽  
Mediterranean Species ◽  
Direct Mercury Analyzer ◽  
Mercury Analyzer ◽  
Main Input ◽  
First Time

Porifera are filter-feeding organisms known to bioaccumulate different contaminants in their tissues. The presence of mercury (Hg) has been reported in different Mediterranean species, mainly collected in the southern coast of France. In the present study, mercury concentrations in the tissue of the sponges of Montecristo and Giglio, two islands of Tuscany Archipelago National Park (TANP), are presented for the first time. Analyses of total mercury content were performed by Direct Mercury Analyzer. Statistical differences have been reported in the Hg concentrations of species collected in both islands, but they do not appear related to the anthropic impacts of the islands. Among the collected species, a high intra- and inter-variability have been recorded, with Cliona viridis showing the lowest concentration (0.0167–0.033 mg·kg−1 dry weight), and Chondrosia reniformis and Sarcotragus spinosulus the highest (0.57 ± 0.15 and 0.64 ± 0.01 mg·kg−1 dry weight, respectively). The variability of Hg measured did not allow us to identify sponges as bioindicators of toxic elements. Anyway, these results improve knowledge on the ecosystem of the TANP, underlining the species-specificity of metal concentrations for Porifera, and providing additional data to address the main input of the Marine Strategy guidelines to protect coasts, seas and oceans.

scholarly journals Total mercury in rice plant (Oryza sativa) collected from Sekinchan, Selangor, Malaysia and associated health risks

Food Research ◽  
2021 ◽  
Vol 5 (S1) ◽  
pp. 132-136
Author(s):  
A.C. Soong ◽  
N.M. Isa ◽  
A.Z. Aris ◽  
H. Haris ◽  
L.J. Looi
Keyword(s):  
Oryza Sativa ◽  
Rice Plant ◽  
Total Mercury ◽  
Mercury Contamination ◽  
Potential Health ◽  
Plant Parts ◽  
Food Regulation ◽  
Direct Mercury Analyzer ◽  
Mercury Analyzer ◽  
The Mean

Consumption of mercury-contaminated rice could pose a potential health risk to humans. In this study, total mercury (THg) concentrations in various parts (roots, stems, leaves, and grains) of rice plant (Oryza sativa) collected from Sekinchan, Selangor, Malaysia were analysed for risk assessment. The THg concentrations in collected samples were analysed by Direct Mercury Analyzer (DMA-80). The mean concentrations found in plant parts were as follows: root, 47.01±0.42 µg/kg; stem, 6.43±1.77 µg/kg; leaf, 26.25±4.71 µg/kg; grain, 2.64±0.42 µg/kg. THg distribution in rice plants was roots > leaves > stems and grains. The mean THg concentration in grain (2.64±0.42 µg/kg) was below the maximum permitted proportion stipulated by Malaysian Food Regulation 1985 (50.0 µg/ kg). The estimated weekly intake (EWI) of THg through rice was 0.07±0.01 µg/kg bw/ week for 60 kg adult, below the provisional tolerable weekly intakes (PTWI) as suggested by JECFA indicating unlikely to cause impairment of public health due to consumption of rice planted in this region. However, periodical monitoring of mercury pollution in Selangor area is crucial because mercury contamination in crops could jeopardize food safety and security

Simultaneous combustion preparation for mercury isotope analysis and detection of total mercury using a direct mercury analyzer

2021 ◽  
Vol 1154 ◽  
pp. 338327
Author(s):  
Maxime Enrico ◽  
Prentiss Balcom ◽  
David T. Johnston ◽  
Julien Foriel ◽  
Elsie M. Sunderland
Keyword(s):  
Total Mercury ◽  
Isotope Analysis ◽  
Mercury Isotope ◽  
Direct Mercury Analyzer ◽  
Mercury Analyzer

Determination of Total Mercury in Sushi Samples Employing Direct Mercury Analyzer

2015 ◽  
Vol 8 (9) ◽  
pp. 2301-2307 ◽  
Author(s):  
Marcelo A. Morgano ◽  
Raquel F. Milani ◽  
Adriana A. M. Perrone
Keyword(s):  
Total Mercury ◽  
Direct Mercury Analyzer ◽  
Mercury Analyzer

Comparison of ICP-MS and direct mercury analyzer for the analysis of mercury in pharmaceuticals

Planta Medica ◽  
2015 ◽  
Vol 81 (16) ◽  
Author(s):  
Y Kho ◽  
M Kim ◽  
NY Park ◽  
H Park ◽  
JH Shin
Keyword(s):  
Direct Mercury Analyzer ◽  
Icp Ms ◽  
Mercury Analyzer

Basic principles for assessing the safety of fish products from the ponds exposed to the influence of nuclear fuel cycle enterprises

2019 ◽  
pp. 106-114
Author(s):  
A. V. Trapeznikov ◽  
V. N. Trapeznikova ◽  
A. V. Korzhavin ◽  
V. N. Nikolkin ◽  
A. P. Plataev
Keyword(s):  
Fuel Cycle ◽  
Specific Activity ◽  
River System ◽  
Food Product ◽  
Human Consumption ◽  
Basic Principles ◽  
Fish Products ◽  
Permissible Levels ◽  
Irtysh River

Relevance. In connection with the development of nuclear energy, many aquatic ecosystems have been exposed to radioactive substances. Fish, as an element of biota, is capable to accumulate radionuclides. However, fish is a traditional food. The control of the technogenic radionuclides accumulation level in the ichthyofauna is an important link in ensuring human security.Intention. To analyze the long-term data on the content of long-lived technogenic radionuclides 90Sr and 137Cs in the ichthyofauna of the Ob-Irtysh river system for the period from 2004 to 2016 and Beloyarsky pond for the period from 1977 to 2018.Methodology. Fish as a food product was assessed according to two criteria: a) permissible levels of specific activity of radionuclides (SanPiN 2.3.2.1078-01); b) using the indicator of conformity B and the uncertainty of its definition В (GOST 32161-2013 and GOST 32163-2013).Results and Discussion. Fish of all species that live in the river Tetcha, is not suitable for food use according to the criteria of SanPiN 2.3.2.1078-01, GOST 32161-2013 and GOST 32163-2013. The fish of the Ob-Irtysh river system, the habitat of which is located outside the Tetcha, meets the requirements for fish products. In the period from 1977 to 1989 in the Beloyarsk pond the accumulations of technogenic radionuclides in fish in quantities exceeding sanitary and hygienic standards were possible. Currently, the fish of the Beloyarsky pond fully complies with the sanitary and hygienic requirements for the radiation factor and is safe for human consumption.Conclusion. In the ponds exposed to the atomic energy enterprises, it is necessary to continuously monitor the content of long-lived technogenic radionuclides in fish and assess their amount in accordance with the requirements of SanPiN 2.3.2.1078-01 and using the conformity indicator В and the uncertainty of its determination В. 

Chesapeake Bay Stock Assessment: Who are they, and Where are they?

1992 ◽  
Vol 26 (12) ◽  
pp. 2705-2709 ◽  
Author(s):  
H. M. Austin
Keyword(s):  
Chesapeake Bay ◽  
Stock Assessment ◽  
Human Consumption ◽  
Population Fluctuations ◽  
Important Species ◽  
Fisheries Resources ◽  
Environmentally Sensitive ◽  
Climate Scale ◽  
Resource And Environment

The Chesapeake Bay, while a significant habitat for fisheries resources, is in actuality an aquatic “bedroom community”, as many of the economically important species are seasonally transient. The pressure on these resources due to their demand for human consumption and recreation, proximity to extensive industrial activity along the shores, and climate scale environmental fluctuations has resulted in stock declines by most important species. Our inability to separate natural population fluctuations from those of anthropogenic origin complicates management efforts. The only way to make these separations, and subsequent informed management decisions is by supporting long-term stock assessment programs (monitoring) in the Bay which allow us to examine trends, cycles and stochastic processes between resource and environment. These programs need to monitor both recruitment and fishing mortality rates of the economically important species, and to identify and monitor the environmentally sensitive “canary” species.

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