scholarly journals KANDUNGAN MERKURI PADA TUMBUHAN PAKU (Diplazium accedens Blume) DI DAERAH TAMBANG EMAS TATELU-TALAWAAN, KABUPATEN MINAHASA UTARA

2015 ◽  
Vol 15 (1) ◽  
pp. 59 ◽  
Author(s):  
Altini O. Kosegeran ◽  
Sendy Rondonuwu ◽  
Herny Simbala ◽  
Marhaenus Rumondor
Keyword(s):  
Plant Species ◽  
Gold Mining ◽  
Soil Analysis ◽  
Mercury Content ◽  
Gold Mine ◽  
Plant Analysis ◽  
Plant Samples ◽  
Direct Mercury Analyzer ◽  
Three Samples ◽  
Mercury Analyzer

ABSTRAK Tumbuhan paku Diplazium accedens Blume merupakan tumbuhan yang termasuk suku polypodiales yang tumbuh di hutan, di daerah pegunungan, rawa, dan di sekitar sungai. Daun paku ini sering dikomsumsi masyarakat sebagai sayur-sayuran. Penelitian ini bertujuan untuk mengetahui kandungan merkuri pada tumbuhan paku di daerah tambang emas Tatelu-Talawaan. Lokasi penelitian terletak di daerah Tambang Emas Talawaan-Tatelu, Kabupataen Minahasa Utara. Metode yang digunakan adalah mencakup analisis sampel tumbuhan paku dan analisis sampel tanah dengan menggunakan Alat Direct Mercury Analyzer. Tumbuhan paku dan tanah yang di ambil di 3 lokasi sebanyak 9 sampel tumbuhan paku dan 3 sampel tanah. Dari 9 sampel tumbuhan paku tidak ada yang mengandung merkuri, sedangkan tanah dari 3 lokasi pada bagian yang C yang mengandung merkuri sebesar 0,6 ppm. Kata kunci: Tanaman paku, merkuri, analisis tanah MERCURY CONTENT IN FERNS (Diplazium accedens Blume) IN THE GOLD MINE TATELU-TALAWAAN, NORTH MINAHASA DISTRICT ABSTRACT The fern Diplazium accedens Blume is a plant species belongs to Polypodiales family that grows in the forest, mountains, swamp, and near the river. This plant consumes as vegetable. This research aimed to measure the level of mercury in the fern grows near the Tatelu-Talawaan gold mining. The location for this research is the area of gold mining of Tatelu-Talawaan, North Minahasa. The methods used were plant analysis and soil analysis using Direct Mercury Analyzer. The plant and soil taken from three locations are consist of nine samples of plants and three samples of soil. None of the nine plant samples contained mercury and the soil from 3 locations contained 0.6 ppm of mercury. Keywords:The fern, mercury, soil analysis

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 Direct Mercury Analyzer (DMA) determination of mercury distribution in the sediments of lake Nokoué in Benin Republic-West Africa

2021 ◽  
Vol 15 (1) ◽  
pp. 306-316
Author(s):  
N.B. Nadia Azon ◽  
Peace Hounkpe ◽  
Julien G. Adounkpe ◽  
Hermione W. Degila ◽  
Martin P. Aina
Keyword(s):  
Mercury Content ◽  
Equal Mass ◽  
Mercury Contamination ◽  
Aquatic Life ◽  
Average Value ◽  
Direct Mercury Analyzer ◽  
Eastern Zone ◽  
The Us ◽  
Us Epa ◽  
Mercury Analyzer

Mercury pollution of water bodies constitutes a hazard to both the aquatic life and the populations consuming fishery products. To anticipate the probable eco-toxicological risks that may arise from the largest lake in southern Benin, the present work aims at assessing the mercury status of the sediments of Lake Nokoué, while identifying the areas exposed to anthropogenic mercury contamination. 45 sites were sampled according to a grid plan covering the entire ecosystem of the lake. Employing a Van Veen grab, surface sediments are collected at a depth from 0 to 5 cm in three catches at each site. The composite samples formed at equal mass on the three portions were frozen, lyophilized at - 40 °C, crushed, sieved and homogenized. Fraction less than 63 µm was collected for the mercury content determination by Direct Mercury Analyzer (DMA) operating by atomic absorption according to the US EPA 7473 method. The mercury concentration varies from 1.56 µg/kg to 164.88 µg/kg with an average value of 35.18 µg per kg of sediment. The south-eastern zone of the lake is more concentrated in mercury with a summation of the mercury content of 530.3 µg/kg of sediment. However, the lake has moderate contamination overall (1 ≤ FC ≤ 3). Keywords: Pollution, contamination, mercury, sediment, Lake Nokoué.

scholarly journals Cover layers to the growth of trees and shrobs over a sulfide spoil from gold mining

2011 ◽  
Vol 35 (4) ◽  
pp. 941-947 ◽  
Author(s):  
Igor Rodrigues de Assis ◽  
Luiz Eduardo Dias ◽  
Walter Antônio Pereira Abrahão ◽  
Emerson Silva Ribeiro Jr ◽  
Jaime Wilson Vargas de Mello
Keyword(s):  
Survival Rate ◽  
Plant Species ◽  
Gold Mining ◽  
Arsenic Content ◽  
Gold Mine ◽  
Albizia Lebbeck ◽  
Cover Layer ◽  
Acacia Farnesiana ◽  
Survival And Growth ◽  
Sealing Layer

This work was done at a gold mine company in Paracatu, MG, Brazil, and was conducted from March 2000 to November 2005. The substrate (spoil) studied was a phillite rock which contains sulfides such as pyrite and arsenopyrite. This study aimed to evaluate the survival and growth of plant species on different combinations of substrate layers over the spoil. These layers were a cover layer and a sealing layer, both deposited over the spoil. The treatment 1 had saprolite (B1) in the sealing layer (SL) and B1 with liming (B1L) in the cover layer (CL). The treatment 2 had B1 in SL and B1L + soil with liming (SoL) in the CL. The treatment 3 had B1 + SoL in the SL and B1L in the CL. The treatment 4 had B1 + SoL in the SL and B1L + SoL in the CL. The plant species used were Acacia farnesiana, A. holosericea, A. polyphylla, Albizia lebbeck, Clitoria fairchildiana, Flemingia sp., Mimosa artemisiana, M. bimucronata e Enterolobium contortisiliquum. Forty and 57 months after planting, collardiameter, height, and living plants were evaluated. The greatest survival rate was oobservedintreatmentwith B horizon of an Oxisoil in both layers, with 80 %. In general, M. bimucronata and A. farnesiana species showed the highest survival rate. The arsenic-content by Mehlich 3 in the cover layer ranged from 0.00 to 14.69 mg dm- 3 among treatments. The experimental results suggest that layers combinations above the sulfide substrate allow the rapid revegetation of the spoil.

scholarly journals Mercury content of sarotherodon melanotheron and chrysischthys nigrodigitatus of Lake Nokoue and Porto Novo lagoon in Benin

2020 ◽  
Vol 14 (6) ◽  
pp. 2322-2332
Author(s):  
Hermione W. Degila ◽  
Nadia B.N. Azon ◽  
Julien G. Adounkpe ◽  
Antoine Chikou ◽  
Martin P. Aïna
Keyword(s):  
Mercury Content ◽  
Living Environment ◽  
Mercury Contamination ◽  
Sample Collection ◽  
Direct Mercury Analyzer ◽  
Productive Water ◽  
Monthly Sample ◽  
Mercury Analyzer ◽  
Sarotherodon Melanotheron ◽  
Porto Novo

Ratification of Minamata Convention by Bénin requires identification of contaminated sites and preservation of health. In this context, the Ministry of Living Environment and Sustainable Development supported the study by making its mercury analyzer DMA80 available. The study aims to identify the level of mercury contamination in two highly valued fish species caught in one of the most productive water bodies where mercury is reported. So, three monthly sample collection campaigns were carried out from April to juin 2018 at nine (09) sites. The back flesh of sarotherodon melanotheron and chrysischthys nigrodigitatus of lake Nokoue and Porto Novo lagoon was analyzed by direct mercury analyzer (DMA 80). it Its operating principle is atomic absorption after thermal decomposition coupled with a gold sensor. The average mercury contents are 20.8 ± 15.5 μg / kg and 6.5 ± 3.8 wet μg / kg weight respectively for Chrysichthys nigrodigitatus and Sarotherodon melanotheron. The highest values obtained at the Porto-Novo bridge for both species remain well below the standard (0.5 mg / kg wet weight). With consumption habits of fish in Benin, the weekly exposure doses seem to be much lower than WHO recommendation. However, deepened studies are needed.Keywords: Fish, mercury, spatial distribution, NoKoué Lake, Porto-Novo Lagoon.

scholarly journals Assessment of the Temporal and Spatial Variation of the Mercury Content of Lake Nokoué in Southern Benin Republic (West Africa)

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Julien G. Adounkpe ◽  
N. B. Nadia Azon ◽  
Hermione W. Dégila ◽  
Peace Hounkpe ◽  
Robertson Amoussou
Keyword(s):  
West Africa ◽  
Mercury Content ◽  
Mercury Contamination ◽  
Direct Mercury Analyzer ◽  
The Us ◽  
Us Epa ◽  
Mercury Analyzer ◽  
Anthropogenic Contribution ◽  
Fishery Products ◽  
Benin Republic

Anthropogenic input of mercury into watersheds is becoming increasingly noticeable and is the cause of fishery products contamination. This had led to the Convention of Minamata signed and ratified by the vast majority of the countries in the world. Lake Nokoué in Benin Republic, the most fishery products provider in West Africa, is subject to mercury pollution. The health threat to both the benthic and the consumers of the fishery products from this lake has to be anticipated by precisely determining the dynamics of mercury contamination of the waters and sediments of Lake Nokoué, taking into account the anthropogenic contribution. Water and sediment samples were collected on 23 sites twice a month for four sampling campaigns. Parameters such as pH, salinity, COD, and SS are evaluated in the water. The assessment of total mercury is conducted by cold vapor atomic absorption according to the US EPA 7473 method, using a direct mercury analyzer (DMA-80). On average, the mercury content in Lake Nokoué water is 0.43 ± 0.57 μg/kg. Its variation is linked not only to the seasonal variation but also to that of the suspended matter. South of the lake, the sediments are extremely polluted (5 ≤ Igeo) and present a risk of frequent effects for the benthic species present.

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

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.

scholarly journals Investigation of Hg Content by a Rapid Analytical Technique in Mediterranean Pelagic Fishes

2018 ◽  
Author(s):  
Giuseppa Di Bella ◽  
Roberta Tardugno ◽  
Nicola Cicero
Keyword(s):  
Mediterranean Sea ◽  
Mediterranean Area ◽  
Pelagic Fish ◽  
Analytical Technique ◽  
Weekly Intake ◽  
Tolerable Weekly Intake ◽  
Direct Mercury Analyzer ◽  
Mercury Analyzer ◽  
Global Concern ◽  
The Mediterranean

Mercury (Hg) fish and seafood contamination is a global concern and needs worldwide sea investigations in order to protect consumers. The aim of this study was to investigate the Hg concentration by means of a rapid and simple analytical technique with direct Mercury Analyzer (DMA-80) in pelagic fish species, Tetrapturus belone (spearfish), Thunnus thynnus (tuna) and Xiphias gladius (swordfish) caught in the Mediterranean Sea. Hg contents were evaluated also in Salmo salar (salmon) as pelagic fish not belonging to the Mediterranean area. The results obtained were variable ranging between 0,015-2,562 mg kg-1 for T. thynnus specie, 0,477-3,182 mg kg-1 for X. gladius, 0,434-1,730 mg kg-1 for T. belone and 0,004-0,019 mg kg-1 for S. salar, respectively. The total Hg tolerable weekly intake (TWI) and % tolerable weekly intake (TWI%) values according to the European Food Safety Authority (EFSA) were calculated. The results highlighted that the pelagic species caught in the Mediterranean Sea should be constantly monitored due to their high Hg contents as well as their TWI and TWI% with respect to S. salar samples.

scholarly journals Diversitas Serangga Hutan Tanah Gambut Di Palangkaraya Kalimantan Tengah

2019 ◽  
Vol 6 (2) ◽  
pp. 156
Author(s):  
Julian Tambunan ◽  
I Ketut Ginantra ◽  
Ni Luh Watiniasih
Keyword(s):  
Plant Species ◽  
Similarity Index ◽  
Pitfall Traps ◽  
Light Traps ◽  
Central Kalimantan ◽  
Plant Samples ◽  
The Family ◽  
Number Of Plant Species ◽  
Burned Forest

This study aims to determine the diversity of insects and plants used as a habitat in unburned and previously burned peat land forests in Palangkaraya, Central Kalimantan. Insects were collected by beating the branches of plants, aerial sweeping, pitfall traps and light traps. Plants were identified in situ or plant samples were collected and identified later in the Lab. The diversity of insects were compared between unburned and previously burned peat forests by analyzing its index diversity (H’) and index of similarity (IS). In total, the insects collected from unburned peat forest were 551 individual, belongs to 12 order and 51 families, and 431 individual insects were collected from previously burned peat forest which belongs to 10 order and 38 families. The family of insects that most frequently found at both areas was Formicidae (Hymenoptera). The insects diversity of both forests were still high, that is H' = 3,45 of unburned peat forest and H '= 3,11 of previously burned peat forest, with the similarity index IS > 50% of both peat forests. The number of plant species found was higher in unburned peat forest (38 species) than in previously burned peat forest (9 species).  The previously burned forest was dominated by Acacia plants, while in unburned peat forest the plants seem to evenly spread.

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