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Aim: The present study was aimed to determine the concentration of heavy metals (Pb, Cr, Mn, Cu and Cd) in waterleaf (Talinum triangulare), lettuce (Lectuca sativa) and spinach (Amaranthus hybridus) from three farmlands.
Study Design and Place of Study: The research was carried out at Kwadon in Yamaltu Deba local Government of Gombe State, Kwadon is located between latitude 10.270ºN and longitude 11.28ºE.
Methodology: The heavy metal concentration in the vegetables was determined by atomic absorption spectrophotometry.
Results: The result showed that the heavy metals concentration in the vegetables across the farms ranges from 2.0–34.4 mg/kg for Mn, 0.025 mg/kg for Cd, 1.7–23.7 mg/kg for Cr, 0.2–1.0% for Cu. The concentration of Mn and Cr are higher than the permissible limit of FAO/WHO in vegetables. To assess the health risk associated with the heavy metals concentration from these vegetables, daily intake of metal (DIM), health risk index (HRI), and target hazard quotient (THQ) were calculated. The daily intake of metals in vegetable species for Mn (0.17–2.81), Cd (2.1), Cu (0.02–0.08), Cr (0.1–2.0) are significantly higher than the recommended daily intake of metals and the upper tolerable daily levels.
Conclusion: This result reflects the risk associated with exposure for the period of life expectancy considered and the inhabitant, are highly exposed to the health risk associated with these metals.
Divrikli U, Horzum N, Soylak M, Elci L. Trace heavy metal contents of some spices and herbal plants from Western Anatolia, Turkey. International Journal of Food Science Technology. 2006;41: 712-716.
Opaluwa OD, Aremu MO, Ogbo LO, Magaji JI, Odiba IE, Ekpo EK. Assessment of heavy metal in water, fish and sediment from Uke Stream, Nasarawa State. Current World Enviornment. 2012;7(2):13-230.
Nwachukwu MA, Feng H, Allinor J. Assessment of heavy metal pollution in soil and their implications with in and around mechanic villages. International Journal of Environmental Science and Technology. 2010;7(2):347–358.
Onibokun AG, Kumuyi AJ. Urban poverty in Nigeria: Towards sustainable strategies for its alleviations centre for African settlement studies and development Ibandan, Nigeria. CASSAD Monography Series; 1996.
Adewole MB, Uchegbu LU. Properties of soils and plants uptake within the vicinity of selected automobile workshops in Ile-Ife, South Western Nigeria. Ethiopian Journal of Environmental Studies and Management. 2010;3(3):23-28.
Ebong GA, Akpan MM, Mkpenie VN. Heavy metal contents of municipal and rural dumpsite soils and rate of accumulation by Carica papaya and Talinum triangulare in Uyo, Nigeria. E-Journal of Chemistry. 2008;5:281-290.
Gokulakrishnan K, Balamurugan K. Advanced technology like reverse osmosis in tannery effluent treatment to enhance the reusing stages of tanning process. International Journal of Applied Environmental Studies. 2010;5(2):146-158.
Gowd SS, Reddy MRM, Govil PK. Assessment of heavy metal contamination in soil at Jajmau (Kanpur) and Unnao Industrial areas of the Ganga plain, Uttar Pradesh, India. Journal of Hazardous Materials. 2010;174:113-121.
Cobb GP, Sands K, Waters M, Wixson BG, Dorwardking E. Accumulation of heavy metals by vegetables grown in mine waste. Environmental Toxicology and Chemistry. 2000;19(3):600-607.
Benson NU, Ebong GA. Heavy metals in vegetables commonly grown in a tropical garden ultisol. Journal of Sustainable Tropical Agricultural Research. 2005;16: 77- 80.
Bonglaisin JN, Mbofung CMF, lantum DN. Intake of lead, cadmium and mercury in kaolin eating: A quality assessment. Journal of Medical Sciences. 2011;11: 267-271.
FAO, WHO. Joint FAO/WHO expert committee on food addition 1999: summary conclusion. Proceedings of the 53rd; 1999.
Adeniyi AA. Determination of cadmium. Copper, iron, lead, managanese and zinc in water leaf (talinum taringulare) in dumpsites. Environment International. 1996;22:259–262.
Oluwole PC, Adeyemo OE, Dowu EE, Ogabela WK. Copper and zinc contents of Nigeria foods and estimates of the adult dietary intake. Food Chemistry. 2003;72: 89–95.
Sharma RK, Agrawal FM, Marshall LW. Heavy metal contamination of soil and vegetabales in suburban areas of Varanasi, India. Ecotoxicology and Environmental Safety. 2008;66:258-266.
EU. Commission regulation (EC) No. 1881/2006 of 19 December 2006 setting maximum levels for certain contaminants in foodstuffs. Official Journal of European Union L364/5; 2006.
Wong KM, Ally WM, Jerry KK. Heavy metal contamination of vegetables and soils Irrigated with sewage water in Yola, Nigerian. Journals of Engineering Research and Development. 1996;2(3): 60–68.
Tsafe AI, Hassan LG, Sahabi DM, Bala BM. Evaluation of heavy metals uptake and risk assessment of vegetables grown in Yargadama of northern Nigeria. Journal of Basic and Applied Scientific Research. 2012;2(7):6708–6714.