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标题：Analysis of heavy metals found in vegetables from some cultivated irrigated gardens in the Kano metropolis, Nigeria
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作者：Abdulmojeed O. Lawal ; Abdulrahman A. Audu
期刊名称：Journal of Environmental Chemistry and Ecotoxicology
电子版ISSN：2141-226X
出版年度：2011
卷号：3
期号：6
页码：142-148
语种：English
出版社：Academic Journals
摘要：The use of industrial and domestic wastewaters for irrigation on vegetable gardens is a public health concern. Using atomic absorption spectrophotometry (AAS), concentrations of Cr, Co, Cu, Ni, Pb and Zn were determined in four different vegetables, including,spinach, okra, onions and tomatoes, grown in effluent irrigated fields at Sharada, Kwakwachi and Jakara in the Kano metropolis, Nigeria. Similar vegetable samples from another irrigated field at Thomas Dam, in the remote part of Kano, were used as control. Samples were collected during dry and rainy seasons. The mean level of metals obtained ranged widely from 0.28 mg/Kg Cr to 18.89 mg/Kg Zn. Samples from Jakara garden indicated highest mean levels of Co (1.14±0.17 mg/Kg), Cu (7.50±1.08 mg/Kg), Zn (18.89±1.93 mg/Kg) and Cr (0.85±0.10 mg/Kg) while those from Sharada indicated highest levels of Ni (2.02±0.35 mg/Kg) and Pb (1.60±0.53 mg/Kg). Comparison of results with the control showed significant levels (p<0.05) of all the metals analyzed in the vegetable samples obtained from the effluent irrigated gardens. However, the levels were within the National Agency for Food and Drug Administration and Control (NAFDAC) tolerable limits for metals in fresh vegetables.
关键词：Industrial effluents; irrigation; vegetables; metals; atomic absorption spectrophotometry (AAS); Kano.