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Assessment of heavy metal contamination in vegetables consumed in Zanzibars

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DOI: 10.4236/ns.2012.48078    6,173 Downloads   10,890 Views   Citations

ABSTRACT

Samples of amaranth and cabbage from Zanzibar were analyzed for heavy metal concentrations using Energy Dispersive X-ray Fluorescence spectrometry (EDXRF) of Tanzania Atomic Energy Commission (TAEC) in Arusha. Thirty samples of amaranth and twenty five samples of cabbage were collected from four farms and two markets at Urban West Region in Zanzibar. The concentrations of Al, Cl, Cr, Mn, Fe, Ni, Zn, Cu, Ag, I, Br, Cd and Pb are presented and discussed. Amaranth had significant (P < 0.05) higher concentrations of Zn, Fe, Cr and Mn than cabbage, whilst Cd, Ni and Pb were significantly (P < 0.05) higher in cabbage than amaranth. Although the mean concentrations of the essential elements were in the range reported in literature, Pb and Cd were in concentrations above FAO/ WHO maximum tolerable limits.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Mohammed, N. and Khamis, F. (2012) Assessment of heavy metal contamination in vegetables consumed in Zanzibars. Natural Science, 4, 588-594. doi: 10.4236/ns.2012.48078.

References

[1] Lokeshwari, H. and Chandrappa, G.T. (2006) Impact of heavy metal contamination of Bellandur Lake on soil and cultivated vegetation. Current Science, 91, 622-627.
[2] Eslami, A., Khaniki, Gh.R.J., Nurani, M., Meharasbi, M., Peyda, M. and Azimi, R. (2007) Heavy metals in edible green vegetables grown along the sites of the Zanjan roads Iran. Journal of Biological Sciences, 7, 943-948. doi:10.3923/jbs.2007.943.948
[3] Arora, M., Kiran, B., Rani, S., Rani, A., Kaur, B. and Mittal, N. (2008) Heavy metal accumulation in vegetables irrigated with water from different sources. Food Chemistry, 111, 811-815. doi:10.1016/j.foodchem.2008.04.049
[4] Kawatra, B.L. and Bakhetia P. (2008) Consumption of heavy metal and minerals by adult women through food in sewage and tube-well irrigated area around Ludhiana city (Punjab, India). Journal of Human Ecology, 23, 351-354.
[5] Sharma, R.K, Agrawal, M. and Marshall, F.M. (2007) Heavy metals contamination of soil and vegetables in suburban areas of Varanasi, India. Ecotoxicology and Environmental Safety, 66, 258-266. doi:10.1016/j.ecoenv.2005.11.007
[6] Haiyan, W. and Stuanes, A. (2003) Heavy metal pollution in air-water-soil-plant system of Zhuzhou city, Hunan province, China. Water, Air and Soil Pollution, 147, 79- 107. doi:10.1023/A:1024522111341
[7] Nwajei, G.E. (2009) Trace elements in soils and vegetations in the vicinity of shell Petroleum Development Company operating area in Ughelli, delta state of Nigeria. American Eurasian. Journal of Sustainable Agriculture, 3, 574-578.
[8] Bahemuka, T.E. and Mubofu, E.B. (1999) Heavy metals in edible green vegetables grown along the sites of the Sinza and Msimbazi rivers in Dar es Salaam, Tanzania. Food Chemistry, 66, 63-66. doi:10.1016/S0308-8146(98)00213-1
[9] Othman, O.C. (2001) Heavy metals in green vegetables and soils from vegetable gardens in Dar es Salaam, Tanzania. Tanzania Journal of Science, 27, 37-48. doi:10.4314/tjs.v27i1.18334
[10] Petersen, S.O., Sommer, S.G., Béline, F., Burton, C., Dach, J., Dourmad, J.Y., Leip, A. Misselbrook, T., Nicholson, F., Poulsen, H.D., Provolo G., Sorensen, P., Vinneras, B., Weiske, A., Bernal, M.P, Bohm, R., Juhász, C. and Mihelic, R. (2007) Recycling of livestock manure in a whole-farm perspective. Journal of Livestock Science, 112, 180-191. doi:10.1016/j.livsci.2007.09.001
[11] Modaihsh A.S., Al Swailem, M.S and Mahjoub, M.D. (2004) Heavy metal content of commercial inorganic fertilizers used in the Kingdom of Saudi Arabia. Agricultural and Marine Sciences, 9, 21-25.
[12] WHO (1995) Lead. Environmental Health Criteria. World Health Organization, Geneva, 165.
[13] Jarup, L. (2003) Hazards of heavy metal contamination. Impact of environmental pollution on health: Balancing risk. British Medical Bulletin, 68, 167-182. doi:10.1093/bmb/ldg032
[14] WHO (1992) Cadmium. Environmental Health Criteria. World Health Organization, Geneva, 280.
[15] Census (2000) Tanzania population and housing census.
[16] FAO/WHO (2001) Food additives and contaminants, Joint Codex Alimentarius Commission, FAO/WHO. Food standards Programme, ALINORM 01/12A.
[17] Kihampa, C. and Mwegoha, W.J.S. (2010) Heavy metals concentrations in vegetables grown along the Msimbazi River in Dar es Salaam, Tanzania. International Journal of Biological and Chemical Sciences, 4, 1932-1938.
[18] Singh, S., Zacharias, M., Kalpana, S. and Mishra, S. (2012) Heavy metals accumulation and distribution pattern in different vegetable crops. Journal of Environmental Chemistry and Ecotoxicology, 4, 75-81.
[19] Adewuyi, G.O., Dawodu, F.A. and Jibiri, N.N. (2010) Studies of the concentration levels of heavy metals in vegetable (Amaranth caudatus) grown in dumpsites within Lagos metropolis, Nigeria. The Pacific Journal of Science and Technology (PJST), 11, 616-621.
[20] Haloi, A., Clarice, R., Thabah, D., Limbul, K., Paul, S., Dkhar and Chakraborty, R. (2010) Assessment of certain essential elements in some common edibles from Dadara and Agyathuri villages of Kamrup District of Assam. Journal of Human Ecology, 31, 79-85.
[21] Singh, A., Sharma, R.K., Agrawal, M. and Marshall, F.M. (2010) Risk assessment of heavy metal toxicity through contaminated vegetables from waste water irrigated area of Varanasi, India. Tropical Ecology, 51, 375-387.
[22] Itana, F. (2002) Metals in leafy vegetables grown in Adi-das Ababa. Ethiopia. Journal of Health and Development, 16, 295-302.

  
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