Urban vegetable farming: Anthropic level, bioavailability, and health implication associated with bioaccumulated trace metals in selected vegetables in Ilorin, Nigeria

Document Type : Original Research Paper

Authors

1 Environmental Biology Unit, Department of Plant Biology, University of Ilorin, Nigeria

2 Department of Chemistry, Akwa Ibom State University, P.M.B. 1167, Uyo, Akwa Ibom State, Nigeria

3 Department of Geography, Osun State University, Osogbo, Nigeria

4 School of Forensic and Applied Science, University of Central Lancashire, PR1 2HE, United Kingdom

Abstract

Urban horticulture is of growing importance in developing and developed countries around the world; however, contamination of urban horticultural products can exceed the precautionary values, posing significant human health risks due to dietary exposure to high levels of the pollutants. In this study, samples of rhizosphere soil and corresponding vegetables have been collected from an urban garden in Ilorin, Nigeria, to assess the contamination level of trace metals as well as the health risk, associated with dietary intake of contaminated vegetables, in adult sub-population. The range of Cu, Pb, and Cd in garden topsoil was 14.0-52.50, 33.00-121.40, and 1.00-4.50 mg/kg, respectively. The metals sources were both anthropogenic and lithogenous, though the long-term accumulation of trace metals in the soil led to significant soil-plant transfer as evident in the levels of metals in some of the vegetables. The estimated daily intakes (EDI) of Cu and Pb through vegetable consumption were far below the recommended tolerable daily intakes (TDI) and the hazard quotient (HQ) values were within the safe zone for the adult population. In contrast, the EDI of Cd for the vegetables was several folds greater than the TDI, thus greatly contributing to a high hazard index (HI>1.0), observed in all vegetables. Therefore, risk assessment of trace metal ingestion through consumption of the vegetables in the adult sub-population depicts serious health hazards with Cd, mainly contributing to vegetable contamination in the studied area.

Keywords

References

Abrahim, G.M.S. and Parker, R.J. (2008). Assessment of heavy metal enrichment factors and the degree of contamination in marine sediments from Tamaki Estuary, Auckland, New Zealand. Environmental Monitoring and Assessment, 136, 227-238.
Adamo, P., Iavazzo, P., Albanese, S., Agrelli, D., De Vivo, B. and Lima, A. (2014). Bioavailability and soil-to-plant transfer factors as indicators of potentially toxic element contamination in agricultural soils. Science of Total Environment, 500-501, 11-22.
Agbenin, J.O., Danko, M. and Welp, G. (2009). Soil and vegetable compositional relationships of eight potentially toxic metals in urban garden fields from northern Nigeria. Journal of the Science of Food and Agriculture,89, 49-54.
Ahaneku, I.E. and Animashaun, I.M. (2013). Determination of water quality index of river Asa, Ilorin, Nigeria. Advances in Applied Science Research, 4, 277-284.
Ajibade, L.T. and Ojelola, A.O. (2004). Effects of Automobile Mechanics Activities on Soils in Ilorin, Nigeria. Geo-Studies Forum An International Journal of Environmental and Policy Issues, 2, 18-27.
Alloway, B. J., 2004. Contamination of soils in domestic gardens and allotments: a brief review. Land Contamination and Reclamation 12, 179-187.
Awotoye, O.O., Dada, A.C. and Arawomo, G.A.O. (2011). Impact of palm oil processing effluent discharge on the quality of receiving soil and river in South Western Nigeria. Journal of Applied Sciences Research, 7, 111-118.
Aydinalp, C. and Marinova, S. (2003). Distribution and forms of heavy metals in some agricultural soils. Polish Journal of Environmental Studies, 12, 629-633.
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.
Biling, W., Zhengmiao, X., Jianjun, C., Juntao, J. and Qiufeng, S. (2008). Effects of field application of phosphate fertilizers on the availability and uptake of lead, zinc and cadmium by cabbage (Brassica chinensis L.) in a mining tailing contaminated soil. Journal of Environmental Sciences, 20, 1109-1117.
Bouyoucos, G.J. (1962). Hydrometer method improved for making particle size analysis of soil. Soil Agronomy Journal, 54, 464-466.
Bowen, H.J.M. (1979). Environmental chemistry of the elements. (London: Academic Press) 333pp.
Bray, R.H. and Kurtz, L.T. (1945). Determination of total organic and available forms of phosphorous in Soils. Soil Sci., 59, 39-45.
Bremner, J.M. (1965). Total Nitrogen. (In: C. A. Black (ed.), Methods of Soil Analysis).  Part 1. American Society of Agronomy, 9, 1149-1178.
Brown, S.L., Chaney, R.L., Lloyd, C.A., Angle, J.S. and Ryan, J.A. (1996). Relative Uptake of Cadmium by Garden Vegetables and Fruits Grown on Long-Term Biosolid-Amended Soils. Environmental Science and Technology, 30, 3508-3511.
Canadian Council of Ministers of the Environment (CCME) 2007. Canadian soil quality guidelines for the protection of environmental and human health: Summary tables. Updated September, 2007. In: Canadian environmental quality guidelines, 1999, Canadian Council of Ministers of the Environment, Winnipeg, pp 1-6.
Cao, H., Chen, J., Zhang, J., Zhang, H., Qiao, L. and Men, Y. (2010). Heavy metals in rice and garden vegetables and their potential health risks to inhabitants in the vicinity of an industrial zone in Jiangsu, China. Journal of Environmental Sciences, 22(11), 1792-1799.
 
Charlesworth, S., De Miguel, E., and Ordonez, A., 2010. A review of the distribution of particulate trace elements in urban terrestrial environments and its application to considerations of risk. Environmental Geochemistry and Health 33, 103-123.
 
Chen, Y., Wu, P., Shao, Y. and Ying, Y. (2014). Health risk assessment of heavy metals in vegetables grown around battery production area. Scientia Agricola, 71, 126-132.
Chiroma, T.M., Ebewele, R.O. and Hymore, F.K. (2014). Comparative assessment of heavy metal levels in soil, vegetables and urban grey waste water used for irrigation in Yola and Kano. International Refereed Journal of Engineering and Science, 3, 1-9.
Ciura, J., Poniedziałek, M., Sękara, A. and Jędrszczyk, E. (2005). The Possibility of Using Crops as Metal Phytoremediants. Polish Journal of Environmental Studies, 14, 17-22.
Cobb, P.G., Sands, K., Waters, M., Wixson, B.G. and Dorward-King, E. (2000). Accumulation of heavy metals by vegetables grown in mine wastes. Environmental Toxicology and Chemistry, 19, 600-607.
De Miguel, E., Iribarren, I., Chacon, E., Ordonez, A. and Charlesworth, S. (2007). Riskbased evaluation of the exposure of children to trace elements in playgrounds in Madrid (Spain). Chemosphere 66, 505-533.
Environment Agency (EA) (2009). Soil Guideline Values for cadmium in soil. Science Report SC050021.
FAO/WHO (2010). Summary report of the seventy-third meeting of JECFA. Joint FAO/WHO Expert Committee on Food Additives, Geneva.
FAO/WHO (2011). Food standards programme codex committee on contaminants in foods. Fifth Session. The Hague, The Netherlands, 21 - 25 March 2011. CF/5 INF/1.
Fasina, A.S., Omotoso, S.O., Shittu, O.S. and Adenikinju, A.P. (2007). Properties, classification and suitability evaluation of some selected cocoa soils of south-western Nigeria. American-Eurasian Journal of Agricultural & Environmental Sciences, 2, 312-317.
Godt, J., Scheidig, F., Grosse-Siestrup, C., Esche, V., Brandenburg, P., Reich, A. and Groneberg, D.A. (2006). The toxicity of cadmium and resulting hazards for human health. Review. Journal of Occupational Medicine and Toxicology, 1, 1-6.
Hart, A.D., Azubuike, C.U., Barimalaa, I.S. and Achinewhu, S.C. (2005). Vegetable consumption pattern of households in selected areas of the old Rivers state in Nigeria. African Journal of Food Agriculture and Nutritional Development, 5, 1-18.
Herman, F., Smidt, S., Huber, S., Englisch, S. and Knoflacher, M. (2000). Evaluation of Pollution-Related Stress Factors for Forest Ecosystems in Central Europe. Environmental Science and Pollution Research, 7, 1-12.
Hseu, Z.Y. (2004). Evaluating heavy metal contents in nine composts using four digestion methods. Bioresource Technology, 95, 53-59.
 
Ibrahim, K.O., Okunlola, I.A. and Abdurrahman, A. (2013). Trace metal indices in the characterization of hydrogeochemical condition of surface water along Asa River, Ilorn, Kwara State, Nigeria. International Journal of Geology, Earth and Environmental Science, 3, 29-35.
 
Ibrahim, I.R., Bako, A.I., Raheem, W.M. and Abdulyekeen, A.O. (2014). Appraisal of urbanization trends in Ilorin, Nigeria. Journal of Sustainable Development in Africa, 168, 1-15.
 
Ikeda, M., Zhang, Z.W., Shimbo, S., Watanabe, T., Nakatsuka, H., Moon, C.S., Matsuda-Inoguchi, N. and Higashikawa, K. (2000). Urban population exposure to lead and cadmium in east and south-east Asia. Science of the Total Environment, 249, 373-384.
Ite, A. E., Udousoro, I. I., and Ibok, U. J. (2014). Distribution of Some Atmospheric Heavy Metals in Lichen and Moss Samples Collected from Eket and Ibeno Local Government Areas of Akwa Ibom State, Nigeria. American Journal of Environmental Protection, 2(1), 22-31.
Jacob, J.O. and Kakulu, S.E. (2012). Assessment of heavy metal bioaccumulation in spinach, jute mallow and tomato in farms within Kaduna metropolis, Nigeria. American Journal of Chemistry, 2, 13-16.
Jarup, L. (2003). Hazards of heavy metal contamination. British Medical Bulletin, 68, 167-182
Jia, L., Wang, W., Li, Y. and Yang, L. (2010). Heavy metals in soil and crops of an intensively farmed area: A case study in Yucheng city, Shandong province, China. International Journal of Environmental Research and Public Health, 7, 395-412.
Jolly, Y.N., Islam, A. and Akbar, S. (2013). Transfer of metals from soil to vegetables and possible health risk assessment. SpringerPlus, 2, 1-8.
Karbassi, A.R., Monavari, S.M., Nabi-Bidhendi, G.R., Nouri, J. and Nematpour, K. (2008). Metal pollution assessment of sediment and water in the Shur River. Environmental Monitoring and Assessment, 147, 107-116.
Kachenko, A.G. and Singh, B. (2006). Heavy metals contamination in vegetable grown in urban and metal smelter contaminated sites in Australia. Water, Air and Soil Pollution, 169, 101-123.
Khan, S., Cao, Q., Zheng, Y.M., Huang, Y.Z. and Zhu, Y.G. (2008). Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China. Environmental Pollution, 152, 686-692.
Khan, S., Rehman, S., Khan, A.Z., Khan, M.A. and Shah, M.T. (2010). Soil and vegetables enrichment with heavy metals from geological sources in Gilgit, Northern Pakistan. Ecotoxicology and Environmental Safety, 73, 1820-1827.
Laboski, C.A.M., Peters, J.B. and Bundy, L.G. (2006). Nutrient application guidelines for field vegetable and fruit crops in Wisconsin. University of Wisconsin Extension Nutrient Application Guidelines A2809.
Lagriffoul, A., Mocquot, B., Mench, M. and Vangronsveld, J. (1998). Cadmium toxicity effects on growth, mineral and chlorophyll contents, and activities of stress related enzymes in young maize plants (Zea mays L.). Plant and Soil, 200, 241-250.
Liu, L., Chen, H., Cai, P., Liang, W. and Huang, Q. (2009). Immobilization and phytotoxicity of Cd in contaminated soil amended with chicken manure compost. Journal of Hazardous Materials, 163, 563-567.
Liu, W., Zhou, Q., Zhang, Y. and Wei, S. (2010). Lead accumulation in different Chinese cabbage cultivars and screening for pollution-safe cultivars. Journal of Environmental Management, 91, 781-788.
Luo, C., Liu, C., Wang, Y., Liu, X., Li, F., Zhang, G. and Li, X. (2011). Heavy metal contamination in soils and vegetables near an e-waste processing site, south China. Journal of Hazardous Materials, 186, 481-490.
Lokeshappa, B., Kandarp, S., Vivek, T. and Anil, K.D. (2012). Assessment of toxic metals in agricultural produce. Food and Public Health, 2, 24-29.
Mbada, C.E., Adedoyin, R.A. and Odejide, A.S. (2009). Relationship between socioeconomic status and body mass index among adult Nigerians. African Journal of Physiotherapy and Rehabilitation Sciences, 1, 1-6.
Muller, G. (1979). Schwermetalle in den Sedimenten des Rheins Veranderungenseit. Umschau, 79, 778-783.
 
Mutune, A.N., Makobe, M.A. and Abukutsa-Onyango, M.O.O. (2014). Heavy metal content of selected African leafy vegetables planted in urban and peri-urban Nairobi, Kenya. African Journal of Environmental Science and Technology, 8, 66-74.
National Population Commission (NPC) (2006). 2006 population and housing census of the Federal Republic of Nigeria. National and state population and housing tables, priority tables, vol 1
 
Ogbonna, I.L.P. and Ogbonna, P.C. (2011). Heavy metal content in soil and medicinal plants in high traffic urban area. Pakistan Journal of Nutrition, 10, 618-624.
Ogunkunle, C.O., Fatoba, P.O., Awotoye, O.O. and Olorunmaiye, K.S. (2013). Root-shoot partitioning of copper, chromium and zinc in Lycopersicon esculentum and Amaranthus hybridus grown in cement-polluted soil. Environmental and Experimental Biology, 11, 131-136.
Ogunkunle, C.O., Ziyath, A.M., Adewumi, F.E. and Fatoba, P.O. (2015). Bioaccumulation and associated dietary risks of Pb, Cd, and Zn in amaranth (Amaranthus cruentus) and jute mallow (Corchorus olitorius) grown on soil irrigated using polluted water from Asa River, Nigeria. Environmental Monitoring and Assessment, 187, 1-7.
Omotoso, T.I. (1973). Factors guiding the determination of phosphorus fertilizer requirements of cocoa growing soils in western Nigeria. In CRIN Memo, 19, 4.
Orisakwe, O.E., Uduka, J.K., Amadi, C.N., Dike, D.O. and Bede, O. (2012). Heavy metal health risk assessment for population via consumption of food crops and fruits in Owerri, South Eastern Nigeria. Chemistry Central Journal, 6, 1-7
Pakula, K. and Kalembasa, D. (2013). Copper fractionation from Cambisols and Luvisols using the BCR procedure. Polish Journal of Environmental Studies, 22, 809-817.
Pourrut, B., Shahid, M., Dumat, C., Winterton, P. and Pinelli, E. (2011). Lead uptake, toxicity, and detoxification in plants. Reviews of Environmental Contamination and Toxicology, 213, 113-136.
Romić, M., Matijević, L., Bakić, H. and Romić, D. (2014). Copper accumulation in vineyard soils: Distribution, fractionation and bioavailability assessment. Environmental Risk Assessment of Soil Contamination,28, 799-825.
Sękara, A., Poniedzialek, M., Ciura, J. and Jędrszczyk, E. (2005). Cadmium and lead accumulation and distribution in the organs of nine crops: Implications for phytoremediation. Polish Journal of Environmental Studies,14, 509-516.
Siebielec, G., Stuczynski, T. and Korzeniowska-Puculele, R. (2006). Metal bioavailability in long-term contaminated Tarnowskie Gory soils. Polish Journal of Environmental Studies, 15, 121-129.
Sinha, P., Dube, B., Srivastava, P. and Chatterjee, C. (2006). Alteration in uptake and translocation of essential nutrients in cabbage by excess lead. Chemosphere, 65, 651-656.
Sobukola, O.P., Adeniran, O.M., Odedairo, A.A. and Kajihausa, O.E. (2010). Heavy metal levels of some fruits and leafy vegetables from selected markets in Lagos, Nigeria. African Journal of Food Science, 4, 389-393.
Steenland, K. and Boffetta, P. (2000). Lead and cancer in humans: where are we now? American Journal of Industrial Medicine, 38,295-299.
Takáč, P., Szabová, T., Kozáková, L. and Benková, M. (2009). Heavy metals and their bioavailability from soils in the long-term polluted Central Spiš region of SR. Plant Soil and Environment, 55, 167-172.
Tan, W.N., Li, Z.A., Qiu, J., Zou, B., Li, N.Y., Zhuang, P. and Wang, G. (2011). Lime and phosphate could reduce cadmium uptake by five vegetables commonly grown in south China. Pedosphere, 21, 223-229.
Tessier, A., Campbell, P.G.C. and Basson, M. (1979). Sequential extraction procedure for
speciation of particulate trace metals. Annal., 5: 844-851.
Tyokumbur, E.T. and Okorie, T. (2011). Bioconcentration of trace metals in the tissues of two leafy vegetables widely consumed in south west Nigeria. Biological Trace Element Research, 140, 215-224.
USEPA (2007). United States, Environmental Protection Agency, Integrated Risk Information System. Washington DC, USA. 
Vega, F.A., Covelo, E.F., Andrade, M.L. and Marcet, P. (2004). Relationships between heavy metals content and soil properties in minesoils. Analytica Chimica Acta, 524, 141-150.
Zeng, F., Ali, S., Zhang, H., Ouyang, Y., Qiu, B., Wu, F. and Zhang, G. (2011). The influence of pH and organic matter content in paddy soil on heavy metal availability and their uptake by rice plants. Environmental Pollution, 159, 84-91.
Zhuang, W. and Gao, X. (2014). Integrated assessment of heavy metal pollution in the surface sediments of the Laizhou Bay and the coastal waters of the Zhangzi Island, China: comparison among typical marine sediment quality indices. PLoS One, 9, e94145 doi: 10.1371/journal.pone.0094145.
Pollution
Volume 3, Issue 2
April 2017
Pages 285-300

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