Abstract
Water convolvulus (Ipomoea aquatica and Ipomoea reptans) or their Malay name “kangkung” is tropical, semiaquatic, and fast-growing vegetables belonging to the morning glory family. They are among the green leafy vegetables widely consumed by Malaysian population. However, excessive use of fertilizer and pesticides in “kangkung” cultivation and contaminated source of irrigation may cause harm to the human health. Samples of Ipomea were collected from local wet market and supermarket, and digested and analyzed by Atomic Absorption Spectrophotometer (AAS). There were significant differences of heavy metal concentration for zinc, copper, manganese, and nickel in both species. The average concentration of Fe, Mn, Zn, Cu, and Ni in I. aquatica was found to be 270.20, 91.14, 32.95, 3.99, and 1.79 mg/kg, respectively, while Fe, Mn, Zn, Cu, and Ni in I. reptans was 275.97, 212.63, 87.33, 18.56, and 3.14 mg/kg, respectively. The daily intake of aforementioned heavy metals was within the safe limit values under Malaysia Food Regulations 1985 and World Health Organization’s provisional tolerable daily intake. Subsequently, the Health Risk Index (HRI) for daily intake of Fe, Zn, Cu, and Ni was less than 1 except for Mn (HRI > 1) indicating possible health effect upon consumption. The use of fertilizers and pesticides should be monitored, and regular sampling of the vegetables is recommended to minimize the heavy metal uptake by water convolvulus, thus reducing human exposure.
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References
Chauhan, G., & Chauhan, P. U. K. (2014). Human health risk assessment of heavy metals via dietary intake of vegetables grown in wastewater irrigated area of Rewa, India. International Journal of Scientific and Research Publications, 4(9), 1–9.
Gupta, S., Jena, V., Jena, S., Davi, N., Matic, N., Radojevi, D., et al. (2013). Assessment of heavy metal contents of green leafy vegetables. Croatian Journal of Food Science and Technology, 5(2), 53–60.
Ismail, B. S., Farihah, K., & Khairiah, J. (2005). Bioaccumulation of heavy metals in vegetables from selected agricultural areas. Bulletin of Environmental Contamination and Toxicology, 74(2), 320–327.
Kananke, T., Wansapala, J., & Gunaratne, A. (2014). Heavy metal contamination in green leafy vegetables collected from selected market sites of Piliyandala area, Colombo District, Sri Lanka. American Journal of Food Science and Technology, 2(5), 139–144.
Khairiah, J., Saad, B. S., Habibah, J., Salem, N., Semail, A., & Ismail, B. S. (2014). Heavy metal content in soils and vegetables grown in an Inland Valley of Terengganu and a River Delta of Kelantan, Malaysia. Research Journal of Environmental and Earth Sciences, 6(6), 307–312.
Li, Y., Wang, H., Wang, H., Yin, F., Yang, X., & Hu, Y. (2014). Heavy metal pollution in vegetables grown in the vicinity of a multi-metal mining area in Gejiu, China: total concentrations, speciation analysis, and health risk. Environmental Science and Pollution Research, 21, 12569–12582.
Likuku, A. S., & Obuseng, G. (2015). Health risk assessment of heavy metals via dietary intake of vegetables irrigated with treated wastewater around Gaborone, Botswana. In International Conference on Plant, Marine and Environmental Sciences (PMES-2015). Kuala Lumpur, Malaysia.
Maimon, A., Khairiah, J., Ahmad Mahir, R., Aminah, A., & Ismail, B. S. (2009). Comparative accumulation of heavy metals in selected vegetables, their availability and correlation in lithogenic and nonlithogenic fractions of soils from some agricultural areas in Malaysia. Advances in Environmental Biology, 3(3), 314–321.
Mapanda, F., Mangwayana, E. N., Nyamangara, J., & Giller, K. E. (2005). The effects of long-term irrigation using water on heavy metal contents of soils under vegetables. Agriculture, Ecosystem and Environment, 107, 151–156.
Marcussen, H., Joergensen, K., Hoilm, P. E., Brocc, D., Simmons, R. W., & Dalsgaard, A. (2008). Element contents and food safety of water spinach (Ipomoea aquatica Forssk.) cultivated with wastewater in Hanoi, Vietnam. Environmental Monitoring and Assessment, 139, 77–91.
Rai, U. N., & Sinha, S. (2001). Distribution of metals in aquatic edible plants: Trapa Natans (Roxb.) Makino and Ipomoea aquatica Forsk. Environmental Monitoring and Assessment, 70, 241–252.
Singh, S., & Kumar, M. (2006). Heavy metal load of soil, water and vegetables. Environmental Monitoring and Assessment, 120, 79–91.
Suruchi, & Pankaj, K. (2011). Assessment of heavy metal contamination in different vegetables grown in and around urban areas. Research Journal of Environmental Toxicology, 5(3), 162–179.
US Cancer Institute. (2008). Usual dietary intakes: NHANES food frequency questionnaire. Retrieved from https://epi.grants.cancer.gov/diet/usualintakes/ffq.html.
Zarcinas, B. A., Fauziah, I., Mclaughlin, M. J., & Cozens, G. (2004). Heavy metals in soils and crops in Southeast Asia. 1. Peninsular Malaysia. Environmental Geochemistry and Health, 26, 343–357.
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Saidin, S.N.R., Shafie, F.A., Yatim, S.R.M., Ismail, R. (2018). Heavy Metals Concentration in Water Convolvulus (Ipomoea aquatica and Ipomoea reptans) and Potential Health Risk. In: Saian, R., Abbas, M. (eds) Proceedings of the Second International Conference on the Future of ASEAN (ICoFA) 2017 – Volume 2. Springer, Singapore. https://doi.org/10.1007/978-981-10-8471-3_82
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DOI: https://doi.org/10.1007/978-981-10-8471-3_82
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