Profil des métaux lourds contenus dans les plantes vivrières consommées couramment dans quelques zones minières de la province du Katanga

Abstract

Kalonda et al. J. Appl. Biosci. 2015Profil des métaux lourds contenus dans les plantes vivrières consommées couramment dans quelques zones minières de la province du Katanga. 9049Profil des métaux lourds contenus dans les plantes vivrières consommées couramment dans quelques zones minières de la province du Katanga. 9050Mots Clés : Métaux lourds, Mines, Katanga. ABSTRACT Context: The contamination of food crops by heavy metals is one major public health problem. Indeed, more and more crops are located in suburban areas, and thus can be affected by past or active polluting industries. This problem is global, and few countries are spared. These contaminations can be related to soil pollution, or water used for irrigation. Objective : The objective of this work was to determine the profile of the metals contained in Manihot esculenta (Sombe); Amaranthus (Lengalenga) and Psidium guajava L. (Mapela), plants used in areas around the mining sites in Katanga Province, Democratic Republic of Congo. Methodology and Results: At issue in this work of a prospective study analyzing the leaves of the aforementioned plants. Plants collected on the site maraicher some mining areas in Katanga province. The presence of heavy metals in the samples was performed by mass spectroscopy (ICP-MS).The analyzes revealed the presence of heavy metals in the samples, and this in different concentrations. However the levels of zinc, copper, cadmium, lead and other heavy metals were beyond normal limits. Conclusion and application of results: Plants Manihot esculenta (Sombe) ; Amaranthus (Lengalenga) and Psidium guajava L. (Mapela), located around the mining areas of Katanga province , contain heavy metals. In most cases, these metals are beyond the normal limits. What could be the basis of poisoning. These results will allow the initiation of preventive measures in relation to food crops in these areas.

Toxicological Characterization of Six Plants of the Beninese Pharmacopoeia Used in the Treatment of Salmonellosis

“…Similar observations have already been made on this same species harvested in some mining areas of Katanga province in the Democratic Republic of Congo, with however much higher rates (probably due to the fact that the study site is a mining area). It should be recalled that, in this study, the rate of this metal in the species varied from one site to another, reflecting the environmental factor highly involved in the presence of heavy metals [24]. It also results that it is useless to compare this rate with that of other studies as long as the environment of origin is not the same.…”

State of the Environment and Its Impacts on the Urban Agriculture of Edible Plants in the City of Lubumbashi

“…This implies that soils containing less than 3 ppm of cobalt, as the soil samples studied in this research, should be considered cobalt-deficient [42]. Even metals reputed toxic to humans such as lead (5.5 mg/kg) and cadmium (8 mg/kg and an average of 0.4 mg/kg) [7] have average concentrations well below the standard in the studied soils. As far as zinc is concerned, its mean concentration in the soil samples subjected to analysis is equal to 12.1 mg/kg.…”

“…), the people from the peripheral quarters of urban centres invested themselves for many years in the growing of edible plants, the breeding of poultry, rabbits, pigs, goats, etc. This is seen as a strategy for quickly accessing fresh food and as a means of increasing household incomes [2][3][4][5][6][7][8][9]. The urban population practices growing edible plants on lands located along streams, railways, and big roads and in the vicinity of water bodies [1][2][3][4].…”

“…Given the easy access to water and arable lands, aside from benefits related to the informal sector paying activities [1,13,14,20], the urban agriculture's practice can be viewed in the Haut-Katanga region as a true godsend for the people living in urban centres [4,21]. However, according to [22], not all people perceive urban agriculture as a godsend; that is, it can benefit a city and its dwellers [2][3][4][5][6][7][8][9][11][12][13][14]. Instead, some people consider it harmful to farmers, consumers, the environment, and the urban land economy.…”

Evaluation de la Translocation du Cadmium, du Cuivre, du Plomb et du Zinc par Zea mays L. cultivé Sur un sSol Ferrugineux Tropical dans l’Ouest du Burkina Faso

“…De nombreux auteurs ont évalué les teneurs en métaux lourds dans des végétaux cultivés tels que la citronnelle, le manioc, la laitue (Senou et al, 2014;Kalonda et al, 2015;Konaté, 2018). Leurs résultats ont montré une bioaccumulation d'éléments toxiques dans les tissus de ces végétaux consommés.…”