Accumulation of soil-borne aluminium, iron, manganese and zinc in plants cultivated in the region of Moanda (Gabon) and nutritional characteristics of the edible parts harvested

Autor: Ondo, Jean Aubin, Biyogo, Richard Menye, Eba, Francois, Prudent, Pascale, Fotio, Daniel, Ollui-Mboulou, Magloire, Omva-Zue, Joseph
Přispěvatelé: Laboratoire Chimie de l'environnement (LCE), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: Journal of the Science of Food and Agriculture
Journal of the Science of Food and Agriculture, Wiley, 2013, 93 (10), pp.2549-2555. ⟨10.1002/jsfa.6074⟩
Journal of the Science of Food and Agriculture, 2013, 93 (10), pp.2549-2555. ⟨10.1002/jsfa.6074⟩
ISSN: 0022-5142
1097-0010
DOI: 10.1002/jsfa.6074⟩
Popis: International audience; Background In central Africa, studies on the transfer of metals from soil to food crops, the composition of foods and the dietary intake of cultivated vegetables are scarce. In this study, aluminium (Al), iron (Fe), manganese (Mn) and zinc (Zn) transfer from naturally (pedogeochemically) contaminated soils into ten edible plants and human exposure to these metals via edible parts of the plants were investigated. Results The fertility of the soils studied was still satisfactory. Soil Al (33029-40031 mg kg-1), Fe (20869 +/- 1124 mg kg-1) and Zn (248.3 +/- 37.9 mg kg-1) concentrations were consistent with those found in agricultural soils, but Mn concentrations were above those normally encountered in arable fields (10000 mg kg-1). The results indicated a substantial accumulation of Fe in red roselle leaves and of Al, Mn and Zn in some leafy plants and okra (fruits). The present study highlights that adults consuming vegetables grown on naturally Mn-rich soils ingest significant amounts of Al, Mn and Zn. However, Zn amounts were below the recommended maximum tolerable levels for hazard risk. Conclusion The study indicated that Al and Mn accumulation in food crops cultivated in the Moanda area of Gabon may represent a health hazard. However, the high levels of Zn in vegetables could be a pathway for Zn supplementation in human nutrition to reduce Zn deficiency in developing countries. (c) 2013 Society of Chemical Industry
Databáze: OpenAIRE
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