Akinsola Francis AWOPETU, Joseph Adewuyi ADEYEMİ, Olukayode Chris ADEDİRE, Chris Olukayode ADEDİRE

Chemical Safety of Unpolished Nigerian Rice

Levels of arsenic (As), lead (Pb), cadmium (Cd), calcium (Ca), chromium (Cr), potassium (K), sodium (Na), and zinc (Zn) in locally cultivated rice consumed in Ondo and Ekiti States of Nigeria were investigated. The rice samples were obtained from six different rice-producing towns; Akure, Ondo, Ado, Igbemo, Ikole and Erinjiyan. The estimated dietary intake (EDI) of these elements were determined and compared with the provisional tolerable daily intake (PTDI) and dietary reference intake (DRI) values for toxic and essential elements respectively. The measured mean levels of Pb, As, Cr, Cd, Zn, Na, Ca and K were 0.047 ± 0.007, 0.041 ± 0.004, 0.570 ± 0.032, 0.026 ± 0.003, 7.856 ± 0.659, 42.15 ± 0.191, 337.11 ± 0.315, and 2650.09 ± 0.337 µg/g respectively while the average EDI were 00.101 ± 0.042 µg/day, 0.088 ± 0.14µg/day, 1.234 ± 0.045 µg/day, 0.057 ± 0.002 µg/day, 0.017 ± 0.071 mg/day, 0.091 ± 0.013 mg/day, 0.73 ± 0.018 mg/day and 5.742 ± 0.337 mg/day respectively. The EDIs were not significantly higher than the reference values for the elements except Cr. Also the rice samples were not rich enough in sodium, calcium and potassium compared to the dietary reference intakes for these elements. It is recommended that rice diets should be supplemented with other food items such as meat, fruits and vegetables.

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Adedire CO, Adeyemi JA, Paulelli AC, Martins-Junior AC, Ileke KD, Segura FR, de Oliveira-Souza VC, Batista BL, Barbosa Jr F. 2015. Toxic and essential elements in Nigerian rice and estimation of dietary intake through rice consumption. Food Additives and Contaminants Part B, 4: 271-276.

Ajijola S, Usman JM, Egbetokun OA, Akoun J, Osalusi CS. 2012. Appraisal of rice production in Nigeria: A case study of north central states of Nigeria. Journal of Stored Product and Postharvest Research, 3: 133 – 136.

AOAC. 2003. Official methods of analysis of the association of official’s analytical chemists, 17th edn. Association of Official Analytical Chemists, Arlington, Virginia.

APHA, WCPF. 1998. Standard methods for examination of water and wastewater. 20th Edition. America Public Health Association, American Water Works and Water Control Pollution Federation, Washington DC, USA: 128.

Arsian S, Arikan A. 2013. Accumulation of heavy metals in bee products effects of distance from highway. Turkish Journal of Agriculture - Food Science and Technology, 1: 90-93.

Balkhair KS, Ashraf MA. 2016. Field accumulation risks of heavy metals in soil and vegetable crop irrigated with sewage water in western region of Saudi Arabia. Saudi Journal of Biological Sciences, 23: S32-S44.

Bamidele FS, Abayomi OO, Esther OA. 2010. Economic analysis of rice consumption patterns in Nigeria. Journal of Agricultural Science and Technology, 12: 1-11.

Batista BL, Nacano LR. Freitas R, Oliveira-Souza VC, Barbosa Jr F. 2012. Determination of essential (Ca, Fe, I, K, Mo) and toxic elements (Hg, Pb) in Brazilian rice grains and estimation of reference daily intake. Food and Nutrition Science, 3: 129-134.

Batista BL, Oliveira-Souza VC, Silva FG, Barbosa Jr F. 2010. Survey of 13 trace elements of toxic and nutritional significance in rice from Brazil and exposure assessment. Food Additives and Contaminants Part B, 3: 253-262.

Batista BL, Souza, JMO de Souza SS, Barbosa Jr F. 2011. Speciation of arsenic in rice and estimation of daily intake of different arsenic species by Brazilians through rice consumption. Journal of Hazardous Materials, 191: 342-348.

Dayan AD, Paine AJ. 2001. Mechanisms of chromium toxicity, carcinogenicity and allergenicity: Review of the literature from 1985 to 2000. Human and Experimental Toxicology, 20: 439– 451.

European Food Safety Authority. 2010. Scientific opinion on lead in food: EFSA panel on contaminants in the food chains. EFSA Journal, 8: 1570, 147 p.

Enterline PE, Day M, Marsh RG. 1995. Cancers related to exposure to arsenic at a copper smelter. Occupational and Environmental Medicine, 52: 28-32.

Food and Agricultural Organization (FAO). 2000. Agriculture towards 2015/30. Technical Interim Report. April, 2000. Rome.

Fu J, Zhou Q, Liu J, Liu W, Wang T, Zhang Q, Jiang G. 2008. High levels of heavy metals in rice (Oryza sativa L.) from typical Ewaste recycling area in southwest China and its potential risk to human health. Chemosphere, 71: 1269-1275.

Geleijnse JM, Kok FJ, Grobbee DE. 2004. Impact of dietary and lifestyle factors on the prevalence of hypertension in Western populations. European Journal of Public Health, 14: 235–239.

Hambidge KM, Krebs NF. 2007. Zinc deficiency: a special challenge. Journal of Nutrition, 137: 1101–1105.

Huang R, Gao S, Wang W, Staunton S, Wang G. 2006. Soil arsenic availability and the transfer of soil arsenic to crops in suburban areas in Fujian Province, southeast China. Science of the Total Environment, 368: 531-541.

Iloeje NP. 2001. A New Geography of Nigeria. Longman Nigeria Ltd, pp 200.

Institute of Medicine. 2004. Dietary reference intakes (DRIs): Recommended intakes for individuals (PDF), Food and Nutrition Board, National Academies, Washington (DC, USA). Retrieved 2009-06-09.

Jung MC, Yun S, Lee J, Lee J. 2005. Baseline study on essential and trace elements in polished rice from South Korea. Environmental Geochemistry and Health, 27: 455-464.

Khush GS. 1997. Origin, dispersal, cultivation and variation of rice. Plant Molecular Biology, 35: 25–34.

Kurnaz A, Mutlu E, Aydın Uncumusaoğlu, A. 2016. Determination of Water Quality Parameters and Heavy Metal Content in Surface Water of Çiğdem Pond ( Kastamonu / Turkey). Turkish Journal of Agriculture - Food Science and Technology, 4 (10): 907- 913.

Linus S, Wingo CS. 2014. Disorders of potassium metabolism. In: Freehally J, Johnson RJ, Floege J. (eds). Comprehensive clinical nephrology, 5th ed, Saunders, St. Louis: pp 118.

Malnic G, Giebisch G, Muto S, Wang W, Bailey MA, Satlin LM. 2013. Regulation of K+ excretion. In: Alpern RJ, Caplan MJ, Moe OW (eds). The kidney: physiology and pathophysiology, 5th ed, Academic Press, London, pp. 1659-1716.

Mertz W. 1969. Chromium occurrence and function in biological systems. Physiological Review, 49: 163-239.

Mudgal V, Maadan N, Mudgal A, Singh RB. 2010. Effect of toxic metals on human health. Open Nutraceuticals Journal, 3: 94-99.

Ossai EK, Iwegbue CM, Ajogungbe EA, Tesi GO. 2015. Polycyclic aromatic hydrocarbon and metal concentration in imported canned maize. Turkish Journal of Agriculture - Food Science and Technology, 3: 53-58.

Poletti J, Pozebon D, Fraga MVB, Dressler VL, Moraes DP. 2014. Toxic and micronutrient elements in organic, brown and polished rice in Brazil. Food Additives and Contaminants Part B, 7: 63-69.

Rastogi SK. 2008. Renal effects of environmental and occupational lead exposure. Indian Journal of Occupational and Environmental Medicine, 12: 103-106.

Satpathy D, Reddy MV, Dhal SP. 2014. Risk assessment of heavy metals contamination in paddy soil, plants, and grains (Oryza sativa L.) at the east coast of India. BioMed Research International, 2014: 545473.

The Africa Rice Center. 2005. Rice trends in Sub-Saharan Africa. [cited 2015 Jul 27]. Available from: http://www.warda.cgiar.org/publications/Rice%20Trends.pdf

Vavas-Acien A, Guallar E, Silbergeld EK, Rothenberg SJ. 2007. Lead exposure and cardiovascular disease - A systematic review. Environmental Health Perspectives, 115: 472-482.

Visveswaran K. 2009. Essentials of Nephrology, 2nd ed, BI Publications.

Williams PN, Price AH, Raab A, Hossain SA, Feldmann J, Meharg AA. 2005. Variation in arsenic speciation and concentration in paddy rice related to dietary exposure. Environmental Science Technology, 39: 5531–5540.

Yilmaz A, Yildiz S, Celik A, Cevik U. 2016. Determination of heavy metal and radioactivity in Agaricus campestris mushroom collected from Kahramanmaras and Erzurum proviencies. Turkish Journal of Agriculture- Food Science and Technology, 4: 208-215.

Yoon KP. 2003. Construction and characterization of multiple heavy metal-resistant phenol-degrading pseudomonads strains. Journal of Microbiology and Biotechnology, 13: 1001-1007.