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Environmental Assessment by Metallic Trace Elements of Gold Soils – Case of Chami (Dakhlet Nouadhibou, Mauritania)

100%

El Hadi S. M. , Hamoud A. , Chakiri S. , El Hadi H. , Sabbar M. S. , Abdeina E. H. , Baghdad B. , Zerdeb M. A. , Vall M.

tom Vol. 24, iss. 6

239--249

In the Inchiri region of northern Mauritania, the discovery of new artisanal methods for extracting gold has made the town of Chami a strategic location for gold miners and their mining operations. Despite the importance of this activity in the country’s economy, to the significant revenues it provides, it is still likely to have a negative impact on the various environmental compartments. The objective of this study was to assess the environmental impact of trace metal elements (ETM) from gold panning in the soils of Chami area. For this purpose, forty soil samples were collected during a field mission in May 2022. The geochemical analyses of the ETM (As, Co, Cr, Cu, Hg, Pb, Ni and Zn) were carried out at the ALS laboratory in Dublin, using the inductively coupled plasma - atomic emission spectroscopy (ICP-AES) technique. The results show that the concentrations of ETM in soils differ according to the sampling station and the considered metal. These concentrations sometimes exceed the normal thresholds. The average value of the pollution index is higher than 1, revealing soil contamination by several elements (As, Cu, Hg and Pb). The geo-accumulation index varying between 0 and 4 shows a medium to high soil pollution class. The correlation matrix obtained shows positive correlations between the studied elements, which suggest that they have the same anthropic origin. These results show an accumulation of metals in soils that can persist in the environment, especially Hg, the most toxic element that is easy to diffuse and change speciation, in addition to being capable of causing risks to the environment and human health.

Assessment of air pollution along express roads and motorways of varied traffic load with the use of bioindicators

84%

Jozwiak M. A. , Rybinski P.

2013

tom 34

Ocena zanieczyszczenia metalami ciezkimi produktow zywnosciowych z rejonu oddzialywania Huty Miedzi Glogow. Cz.II. Ziemniaki, warzywa i owoce

51%

Orzel D. , Figurska-Ciura D. , Styczynska M. , Bronkowska M. , Zechalko-Czajkowska A.

nr 4

323-328

Oznaczono za pomocą spektrofotometrii absorpcji atomowej zawartość metali ciężkich (Pb, Cd, Zn i Cu) w ziemniakach, warzywach i owocach, pochodzących z rejonu oddziaływania Huty Miedzi „Głogów". Zawartość tych pierwiastków w ziemniakach, marchwi, kapuście, burakach i jabłkach stanowiła 10-50% maksymalnych dopuszczalnych wartości, obowiązujących w okresie badań. W ponad 50% próbek naci pietruszki i w 10% próbek sałaty stwierdzono ponadnormatywne ilości ołowiu.

Lead, cadmium, zinc and copper contents of potatoes, carrot, cabbage, beetroot and apples collected in 1995-1997 from the emission region of the "Głogów" copper foundry were determined by atomic absorption spectrometry (AAS). Mean lead and cadmium contents of potatoes, carrot, cabbage, beetroot and apples were similar, ranging from 0.020 mg/kg to 0.063 mg/kg and from 0.005 mg/kg to 0.016 mg/kg, respectively. These values represented from 10% to 50% of the maximum values admissible at the time of the study. Mean lead content in the leaves of parsley and lettuce was 0.805 mg/kg and 0.241 mg/kg, respectively. Maximum admissible value for lead was exceeded in 50% examined parsley leave and 10% lettuce samples. Zinc and copper levels in all studied products, except for lettuce, were similar and ranged from 1.52 to 8.60 mg Zn/kg and 0.30 to 3.94 mg Cu/kg. Copper content of all lettuce samples collected in 1997 was from 105% to 195% maximum values admissible at the time of the study.

Problemy zanieczyszczenia środowiska przez infrastrukturę transportową na przykładzie Roztoczańskiego Parku Narodowego

51%

Slowik T. , Jackowska I. , Piekarski W.

nr 5[165]