The concentration and health risk of potentially toxic elements in black and green tea—both bagged and loose-leaf

Main Article Content

Ali Heshmati
Freshteh Mehri
Javad Karami-Momtaz
Amin Mousavi Khaneghah

Keywords

PTEs, Iran, green tea, risk assessment, black tea

Abstract

The concentration of potentially toxic elements (PTEs), including lead (Pb), cadmium (Cd), arsenic (As), zinc (Zn), and copper (Cu), among 160 samples of black and green tea—both bagged and loose-leaf—in Iran was determined using a graphite furnace atomic absorption spectrophotometer (GF-AAS). Besides, the transfer rate of PTEs from made tea into tea infusion was investigated, and the related health risk for consumers was assessed. According to the results, the content of the PTEs is dependent on the type of tea (black or green), the place of cultivation (Iran or India), and the supplied form (both bagged and loose-leaf). The concentration of Pb, Cd, and As in green tea was significantly lower than black tea (P-value < 0.05). On the other hand, the contents of Zn and Cu in green tea were higher than the corresponding values for black tea. The mean concentration of Pb, As, and Zn in bagged tea samples was significantly higher than those of loose-leaf tea, while the Cd and As levels in Iranian tea samples were significantly lower than the Indian samples. Generally speaking, the mean concentration of Pb, Cd, As, Zn, and Cu were 0.59 ± 0.12, 0.12 ± 0.06, 0.16 ± 0.12, 14.23 ± 4.90, and 11.10 ± 2.49 mg kg−1, respectively. The mean transfer rates of Pb, Cd, As, Zn, and Cu were 7.78, 6.29, 9.27, 12.91, and 13.08%, respectively. The estimated daily intake (EDI) and noncarcinogenic quotient (target hazard quotient [THQ]) due to the ingestion of PTEs besides the carcinogenic risk of As and Cd were considered as acceptable.

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References

Abass, A., Awoyale, W. and Alamu, E., 2019. Assessment of the chemical and trace metal composition of dried cassava products from Nigeria. Quality Assurance and Safety of Crops & Foods 11: 43–52. 10.3920/QAS2018.1273

Amiri, S., Akhavan, H., Zare, N. and Radi, M., 2018. Effect of gelatin-based edible coatings incorporated with aloe vera and green tea extracts on the shelf-life of fresh-cut apple. 9764650. Italian Journal of Food Science 30. 10.14674/1120-1770-IJFS699

Antoine, J.M., Fung, L.A.H. and Grant, C.N., 2017. Assessment of the potential health risks associated with the aluminium, arsenic, cadmium and lead content in selected fruits and vegetables grown in Jamaica. Toxicology Reports 4: 181–187. 10.1016/j.toxrep.2017.03.006

Árvay, J., Hauptvogl, M., Tomáš, J. and Harangozo, L., 2015. Determination of mercury, cadmium and lead contents in different tea and teas infusions (Camellia sinensis, L.). Potravinarstvo 9: 398–402. 10.5219/510

Ashraf, W. and Mian, A.A., 2008. Levels of selected heavy metals in black tea varieties consumed in Saudi Arabia. Bulletin of Environmental Contamination and Toxicology 81: 101–104. 10.1007/s00128-008-9402-0

Atasoy, A.D., Yesilnacar, M.I. and Atasoy, A.F., 2019. Essential element contents of Turkish black tea, non-alcoholic beverages. Elsevier, Woodhead Publishing, pp. 63–72.

Barone, G., Giacominelli-Stuffler, R. and Storelli, M.M., 2016. Evaluation of trace metal and polychlorinated biphenyl levels in tea brands of different origin commercialized in Italy. Food and Chemical Toxicology 87: 113–119. 10.1016/j.fct.2015.12.008

Benjakul, S., Pisuchpen, S., O’Brien, N. and Karnjanapratum, S., 2018. Effect of antioxidants and packing conditions on storage stability of cereal bar fortified with hydrolyzed collagen from seabass skin. Italian Journal of Food Science 31: 347–366. 10.14674/IJFS-1211

Brzezicha-Cirocka, J., Grembecka, M. and Szefer, P., 2016. Monitoring of essential and heavy metals in green tea from different geographical origins. Environmental Monitoring and Assessment 188: 183. 10.1007/s10661-016-5157-y

Byber, K., Lison, D., Verougstraete, V., Dressel, H. and Hotz, P., 2016. Cadmium or cadmium compounds and chronic kidney disease in workers and the general population: a systematic review. Critical Reviews in Toxicology 46: 191–240. 10.3109/10408444.2015.1076375

Chang, K., 2015. World tea production and trade: current and future development. Food and Agriculture Organization Of The United Nations, Rome.

Chen, Z., Cai, Y., Solo-Gabriele, H., Snyder, G.H. and Cisar, J.L., 2006. Interactions of arsenic and the dissolved substances derived from turf soils. Environmental Science & Technology 40: 4659–4665. 10.1021/es060619m

Dambiec, M., Polechońska, L. and Klink, A., 2013. Levels of essential and non-essential elements in black teas commercialized in Poland and their transfer to tea infusion. Journal of Food Composition and Analysis 31: 62–66. 10.1016/j.jfca.2013.03.006

de Oliveira, L.M., Das, S., da Silva, E.B., Gao, P., Gress, J., Liu, Y. and Ma, L.Q., 2018. Metal concentrations in traditional and herbal teas and their potential risks to human health. Science of the Total Environment 633: 649–657. 10.1016/j.scitotenv.2018.03.215

Falahi, E. and Hedaiati, R., 2013. Heavy metal content of black teas consumed in Iran. Food Additives & Contaminants: Part B 6: 123–126. 10.1080/19393210.2013.764550

Fernández-Cáceres, P.L., Martín, M.J., Pablos, F. and González, A.G., 2001. Differentiation of tea (Camellia sinensis) varieties and their geographical origin according to their metal content. Journal of Agricultural and Food Chemistry 49: 4775–4779. 10.1021/jf0106143

Goldhaber, S.B., 2003. Trace element risk assessment: essentiality vs. toxicity. Regulatory Toxicology and Pharmacology 38: 232–242. 10.1016/S0273-2300(02)00020-X

Gruszecka-Kosowska, A. and Mazur-Kajta, K., 2016. Potential health risk of selected metals for Polish consumers of oolong tea from the Fujian Province, China. Human and Ecological Risk Assessment: An International Journal 22: 1147–1165. 10.1080/10807039.2016.1146572

Gu, Y.G., Li, Q.S., Fang, J.H., He, B.Y., Fu, H.B. and Tong, Z.J., 2014. Identification of heavy metal sources in the reclaimed farmland soils of the pearl river estuary in China using a multivariate geostatistical approach. Ecotoxicology and Environmental Safety 105: 7–12. 10.1016/j.ecoenv.2014.04.003

Han, L. and Li, R., 2002. Determination of minerals and trace elements in various tea by ICP-AES. Guang pu 22: 304–306.

Han, W.-Y., Shi, Y.-Z., Ma, L.-F. and Ruan, J.-Y., 2005. Arsenic, cadmium, chromium, cobalt, and copper in different types of Chinese tea. Bulletin of Environmental Contamination and Toxicology 75: 272–277. 10.1007/s00128-005-0748-2

Han, W.-Y., Zhao, F.-J., Shi, Y.-Z., Ma, L.-F. and Ruan, J.-Y., 2006. Scale and causes of lead contamination in Chinese tea. Environmental Pollution 139: 125–132. 10.1016/j.envpol.2005.04.025

Heshmati, A., Karami-Momtaz, J., Nili-Ahmadabadi, A. and Ghadimi, S., 2017. Dietary exposure to toxic and essential trace elements by consumption of wild and farmed carp (Cyprinus carpio) and Caspian kutum (Rutilus frisii kutum) in Iran. Chemosphere 173: 207–215. 10.1016/j.chemosphere.2017.01.009

Heshmati, A., Mehri, F., Karami-Momtaz, J. and Mousavi Khaneghah, A., 2020. Concentration and risk assessment of potentially toxic elements, lead and cadmium, in vegetables and cereals consumed in Western Iran. Journal of Food Protection 83: 101–107. 10.4315/0362-028x.jfp-19-312

Heshmati, A., Sadati, R., Ghavami, M. and Mousavi Khaneghah, A., 2019. The concentration of potentially toxic elements (PTEs) in muscle tissue of farmed Iranian rainbow trout (Oncorhynchus mykiss), feed, and water samples collected from the west of Iran: a risk assessment study. Environmental Science and Pollution Research 26: 34584–34593. 10.1007/s11356-019-06593-x

Heshmati, A. and Salaramoli, J., 2015. Distribution pattern of cadmium in liver and kidney of broiler chicken: an experimental study. Journal of Food Quality and Hazards Control 2: 15–19.

Hong, Y.-S., Song, K.-H. and Chung, J.-Y., 2014. Health effects of chronic arsenic exposure. Journal of Preventive Medicine and Public Health 47: 245. 10.3961/jpmph.14.035

Hosseni, S., Shakerian, A. and Moghimi, A., 2013. Cadmium and lead content in several brands of black tea (Camellia sinensis) in Iran. Journal of Food Biosciences and Technology 3: 67–72.

Hu, W., Chen, Y., Huang, B. and Niedermann, S., 2014. Health risk assessment of heavy metals in soils and vegetables from a typical greenhouse vegetable production system in China. Human and Ecological Risk Assessment: An International Journal 20: 1264–1280. 10.1080/10807039.2013.831267

Hussain, N., Ishak, I., Harith, N.M. and Kuan, G.L.P., 2019. Comparison of bioactive compounds and sensory evaluation on edible flowers tea infusion. Italian Journal of Food Science 31: 264-273. 10.14674/IJFS-1071

IARC, 2011. Agents classified by the IARC monographs. In: Julia Smedley, Finlay Dick, and Steven Sadhra (Eds) Oxford handbook of occupational health. OUP Oxford, Oxford, UK.

INSO, 2014a. Black tea – specifications and test methods. 3rd revision. No. 623. Iranian National Standardization Organization, Karaj, Iran.

INSO, 2014b. Green tea—specifications and test methods. 1st revision. No. 10768. Iranian National Standardization Organization, Kraj. Iran.

JECFA 1993 Joint FAO/WHO Expert Committee on Food Additives. Evaluation of certain food additives and contaminants: 41st report of the Joint FAO/WHO Expert Committee on Food Additives. World Health Organization, Geneva. Technical Reports Series No. 837.

Jin, C.W., Du, S.T., Zhang, K. and Lin, X.Y., 2008. Factors determining copper concentration in tea leaves produced at Yuyao County, China. Food and Chemical Toxicology 46: 2054–2061. 10.1016/j.fct.2008.01.046

Karak, T. and Bhagat, R., 2010. Trace elements in tea leaves, made tea and tea infusion: a review. Food Research International 43: 2234–2252. 10.1016/j.foodres.2010.08.010

Karak, T., Paul, R., Sonar, I., Nath, J., Boruah, R. and Dutta, A., 2016. Nickel dynamics influenced by municipal solid waste compost application in tea (Camellia sinensis L.): a cup that cheers. International Journal of Environmental Science and Technology 13: 663–678. 10.1007/s13762-015-0900-4

Karimi, G., Hasanzadeh, M., Nili, A., Khashayarmanesh, Z., Samiei, Z., Nazari, F. and Teimuri, M., 2008. Concentrations and health risk of heavy metals in tea samples marketed in Iran. Pharmacology 3: 164–174.

Khan, N. and Mukhtar, H., 2019. Tea polyphenols in promotion of human health. Nutrients 11: 39. 10.3390/nu11010039

Li, L., Fu, Q.L., Achal, V. and Liu, Y., 2015. A comparison of the potential health risk of aluminum and heavy metals in tea leaves and tea infusion of commercially available green tea in Jiangxi, China. Environmental Monitoring and Assessment 187: 1–12. 10.1007/s10661-015-4445-2

Lin, D., Zhu, L. and Luo, L., 2006. Factors affecting transfer of polycyclic aromatic hydrocarbons from made tea to tea infusion. Journal of Agricultural and Food Chemistry 54: 4350–4354. 10.1021/jf060189j

Lisia, M., Priscila, D., Jaylei, M.G. and Silvana, C.J., 2019. Determination of arsenic, cadmium and lead concentration in teas, commercialized in Rio De Janeiro, Brazil, and their transfer to tea infusion. Journal of Mathematics 2015: 179–186.

Martín-Domingo, M.C., Pla, A., Hernández, A., Olmedo, P., Navas-Acien, A., Lozano-Paniagua, D. and Gil, F., 2017. Determination of metalloid, metallic and mineral elements in herbal teas. Risk assessment for the consumers. Journal of Food Composition and Analysis 60: 81–89. 10.1016/j.jfca.2017.03.009

Matsuura, H., Hokura, A., Katsuki, F., Itoh, A. and Haraguchi, H., 2001. Multielement determination and speciation of major-to-trace elements in black tea leaves by ICP-AES and ICP-MS with the aid of size exclusion chromatography. Analytical Sciences 17: 391–398. 10.2116/analsci.17.391

Milani, R.F., Morgano, M.A. and Cadore, S., 2016. Trace elements in Camellia sinensis marketed in southeastern Brazil: extraction from tea leaves to beverages and dietary exposure. LWT-Food Science and Technology 68: 491–498. 10.1016/j.lwt.2015.12.041

Moreda-Pineiro, A., Fisher, A. and Hill, S.J., 2003. The classification of tea according to region of origin using pattern recognition techniques and trace metal data. Journal of Food Composition and Analysis 16: 195–211. 10.1016/S0889-1575(02)00163-1

Narin, I., Colak, H., Turkoglu, O., Soylak, M. and Dogan, M., 2004. Heavy metals in black tea samples produced in Turkey. Bulletin of Environmental Contamination and Toxicology 72: 844–849. 10.1007/s00128-004-0321-4

Nejatolahi, M., Mortazavi, S. and Ildoromi, A., 2014. Levels of Cu, Zn, Pb, and Cd in the leaves of the tea plant (Camellia sinensis) and in the soil of Gilan and Mazandaran farms of Iran. Journal of Food Measurement and Characterization 8: 277–282. 10.1007/s11694-014-9186-3

Nkansah, M.A., Opoku, F. and Ackumey, A.A., 2016. Risk assessment of mineral and heavy metal content of selected tea products from the Ghanaian market. Environmental Monitoring and Assessment 188: 332. 10.1007/s10661-016-5343-y

Nookabkaew, S., Rangkadilok, N. and Satayavivad, J., 2006. Determination of trace elements in herbal tea products and their infusions consumed in Thailand. Journal of Agricultural and Food Chemistry 54: 6939–6944. 10.1021/jf060571w

Plum, L.M., Rink, L. and Haase, H., 2010. The essential toxin: impact of zinc on human health. International Journal of Environmental Research and Public Health 7: 1342–1365. 10.3390/ijerph7041342

Podwika, W., Kleszcz, K., Krośniak, M. and Zagrodzki, P., 2018. Copper, manganese, zinc, and cadmium in tea leaves of different types and origin. Biological Trace Element Research 183: 389–395. 10.1007/s12011-017-1140-x

Polechońska, L., Dambiec, M., Klink, A. and Rudecki, A., 2015. Concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in Poland. Journal of Food and Drug Analysis 23: 486–492. 10.1016/j.jfda.2014.08.003

Popović, S., Pantelić, A., Milovanović, Ž., Milinkov, J. and Vidović, M., 2017. Analysis of tea for metals by flame and graphite furnace atomic absorption spectrometry with multivariate analysis. Analytical Letters 50: 2619–2633. 10.1080/00032719.2017.1307849

Pourramezani, F., Akrami Mohajeri, F., Salmani, M.H., Dehghani Tafti, A. and Khalili Sadrabad, E., 2019. Evaluation of heavy metal concentration in imported black tea in Iran and consumer risk assessments. Food Science & Nutrition 7: 4021–4026. 10.1002/fsn3.1267

Prasanth, M.I., Sivamaruthi, B.S., Chaiyasut, C. and Tencomnao, T., 2019. A review of the role of green tea (Camellia sinensis) in antiphotoaging, stress resistance, neuroprotection, and autophagy. Nutrients 11: 474. 10.3390/nu11020474

Qin, D., Jiang, H., Bai, S., Tang, S. and Mou, Z., 2015. Determination of 28 trace elements in three farmed cyprinid fish species from Northeast China. Food Control 50: 1–8. 10.1016/j.foodcont.2014.08.016

Saha, N. and Zaman, M., 2013. Evaluation of possible health risks of heavy metals by consumption of foodstuffs available in the central market of Rajshahi City, Bangladesh. Environmental Monitoring and Assessment 185: 3867–3878. 10.1007/s10661-012-2835-2

Saini, S. and Dhania, G., 2020. Cadmium as an environmental pollutant: ecotoxicological effects, health hazards, and bioremediation approaches for its detoxification from contaminated sites, bioremediation of industrial waste for environmental safety. Springer, Singapore, pp. 357–387.

Salahinejad, M. and Aflaki, F., 2010. Toxic and essential mineral elements content of black tea leaves and their tea infusions consumed in Iran. Biological Trace Element Research 134: 109–117. 10.1007/s12011-009-8449-z

Salgueiro, M.J., Zubillaga, M., Lysionek, A., Sarabia, M.I., Caro, R., De Paoli, T., Hager, A., Weill, R. and Boccio, J., 2000. Zinc as an essential micronutrient: a review. Nutrition Research 20: 737–755. 10.1016/S0271-5317(00)00163-9

Saud, S. and Oud, A., 2003. Heavy metal contents in tea and herb leaves. Pakistan Journal of Biological Science 6: 208–202. 10.3923/pjbs.2003.208.212

Schwalfenberg, G., Genuis, S.J. and Rodushkin, I., 2013. The benefits and risks of consuming brewed tea: beware of toxic element contamination. Journal of Toxicology. 370460. 10.1155/2013/370460

Shekoohiyan, S., Ghoochani, M., Mohagheghian, A., Mahvi, A.H., Yunesian, M. and Nazmara, S., 2012. Determination of lead, cadmium and arsenic in infusion tea cultivated in north of Iran. Iranian Journal of Environmental Health Science & Engineering 9: 37. 10.1186/1735-2746-9-37

Shi, Y., Jin, L. and Zhu, Y., 2007. The contents status quo and the accumulation characteristic of heavy metal in tea. China Tea 6: 17–19.

Sofuoglu, S.C. and Kavcar, P., 2008. An exposure and risk assessment for fluoride and trace metals in black tea. Journal of Hazardous Materials 158: 392–400. 10.1016/j.jhazmat.2008.01.086

Soliman, N., 2016. Metals contents in black tea and evaluation of potential human health risks to consumers. Health Economics & Outcome Research: Open Access 2: 1–4. 10.4172/2471-268X.1000109

Srividhya, B., Subramanian, R. and Raj, V., 2011. Determination of lead, manganese, copper, zinc, cadmium, nickel and chromium in tea leaves. International Journal of Pharmacy and Pharmaceutical Sciences 13: 257–258.

Street, R., Szakova, J., Drabek, O. and Mladkova, L., 2006. The status of micronutrients (Cu, Fe, Mn, Zn) in tea and tea infusions in selected samples imported to the Czech Republic. Czech Journal of Food Sciences 24: 62. 10.17221/3301-CJFS

Sun, L., Xu, H., Ye, J. and Gaikwad, N.W., 2019. Comparative effect of black, green, oolong, and white tea intake on weight gain and bile acid metabolism. Nutrition 65: 208–215. 10.1016/j.nut.2019.02.006

Szymczycha-Madeja, A., Welna, M. and Pohl, P., 2012. Elemental analysis of teas and their infusions by spectrometric methods. TrAC Trends in Analytical Chemistry 35: 165–181. 10.1016/j.trac.2011.12.005

Tokalıoğlu, Ş. and Kartal, Ş., 2004. Bioavailability of soil-extractable metals to tea plant by BCR sequential extraction procedure. Instrumentation Science & Technology 32: 387–400. 10.1081/CI-120037671

Tsushida T, Takeo T. 1977. Zinc, copper, lead and cadmium contents in green tea. Journal of the Science of Food and Agriculture 28: 255-258.

USEPA, 2001. Risk assessment guidance for superfund: volume III part A, process for conducting probabilistic risk assessment. US Environmental Protection Agency, Washington, DC.

USEPA, 2017. Integrated Risk Information System (IRIS). Available at: https://www.epa.gov/iris.

WHO, 2011. Guidelines for drinking-water quality. World Health Organization.

Xu, X.-Y., Zhao, C.-N., Cao, S.-Y., Tang, G.-Y., Gan, R.-Y. and Li, H.-B., 2020. Effects and mechanisms of tea for the prevention and management of cancers: an updated review. Critical Reviews in Food Science and Nutrition 60: 1693–1705. 10.1080/10408398.2019.1588223

Yousefi, N., Jahangard, A. and Mahmoudian, M.H., 2017. Heavy metal concentration in black tea in Iran. Archives of Hygiene Sciences 6: 128–135. 10.29252/ArchHygSci.6.2.128

Zeng, F., Wei, W., Li, M., Huang, R., Yang, F. and Duan, Y., 2015. Heavy metal contamination in rice-producing soils of Hunan province, China and potential health risks. International Journal of Environmental Research and Public Health 12: 15584–15593. 10.3390/ijerph121215005

Zhang, J., Yang, R., Chen, R., Peng, Y., Wen, X. and Gao, L., 2018a. Accumulation of heavy metals in tea leaves and potential health risk assessment: a case study from Puan county, Guizhou province, China. International Journal of Environmental Research and Public Health 15: 133. 10.3390/ijerph15010133

Zhang, L., Zhang, J., Chen, L., Liu, T., Ma, G. and Liu, X., 2018b. Influence of manufacturing process on the contents of iron, copper, chromium, nickel and manganese elements in crush, tear and curl black tea, their transfer rates and health risk assessment. Food Control 89: 241–249. 10.1016/j.foodcont.2018.01.030

Zhelev, I., Barman, T., Barooah, A.K., Goswami, B.C., Sharma, N., Panja, S., Khare, P. and Karak, T., 2020. Contents of chromium and arsenic in tea (Camellia sinensis L.): extent of transfer into tea infusion and health consequence. Biological Trace Element Research. 196, 318–329. 10.1007/s12011-019-01889-y

Zhong, W-S., Ren, T., Zhao L-J. 2016. Determination of Pb (Lead), Cd (Cadmium), Cr (Chromium), Cu (Copper), and Ni (Nickel) in Chinese tea with high-resolution continuum source graphite furnace atomic absorption spectrometry. Journal of Food and Drug Analysis. 24: 46-55. 10.1016/j.jfda.2015.04.010