Main Article Content


Purpose of the study: Heavy metals in food (vegetables, etc.) are harmful to humans due to their non-biodegradable nature, long biological half-lives, and their potential to accumulate in different body parts. Prolonged consumption of such heavy metal contaminated vegetables through foodstuffs may lead to chronic accumulation of heavy metals in human beings' kidneys and liver, disrupting numerous biochemical processes, leading to cardiovascular, neural, kidney and bone diseases.

Method: The study on heavy metal concentrations in vegetables grown in the command areas of Varthur lake, Bangalore. The collected vegetable samples were analyzed using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) technique to assess the level of heavy metal in acid digested samples.

Main Findings: The study has shown a significant accumulation of heavy metals in vegetables that correlated well with its concentrations in soil and lake water. The prolonged irrigation of vegetables using contaminated lake water has led to soil contamination, which ultimately resulted in contamination of vegetables due to the uptake and accumulation of heavy metals in edible portions of vegetables.

Application of the Study: Urgent attention is needed to devise and implement appropriate means of regular monitoring of the toxic heavy metals from domestic sewage and industrial effluent and provide proper advice and support for the safe and productive use of wastewater for irrigation purposes to prevent excessive buildup of heavy metals in the food chain.


food chain heavy metals health vegetable wetlands

Article Details

Author Biographies

T V Ramchandra, Indian Institute of Science, Bangalore, Karnataka

Energy & Wetlands Research Group, Centre for Ecological Sciences, Centre for Sustainable Technologies (astra), Centre for infrastructure, Sustainable Transportation and Urban Planning, Indian Institute of Science, Bangalore, Karnataka, India,

N R Narayan, Energy & Wetlands Research Group, Centre for Ecological Sciences

Energy & Wetlands Research Group, Centre for Ecological Sciences

How to Cite
Ramchandra, T. V., & Narayan, N. R. (2021). HEAVY METALS IN THE FOOD CHAIN - CONSEQUENCES OF POLLUTING WATER BODIES . Green Chemistry & Technology Letters, 7(1), 07-17.


  1. Ackah M., Anim A. K., Gyamfi E. T., Zakaria N., Hanson J., Tulasi D., Enti-Brown S., Saah-Nyarko E., Bentil N. O., Osei J. (2014); Uptake of heavy metals by some edible vegetables irrigated using wastewater: a preliminary study in Accra, Ghana; Environ Monit Assess 186:621–634.
  2. Ahalya N., Ramachandra T. V. (2006); Phytoremediation: Processes and Mechanisms; J. Ecobiol.18 (1) 33-38.
  3. Ali H., Khan E., Sajad M. A. (2013); Phytoremediation of heavy metals—Concepts and applications; Chemosphere 91 869–881. DOI:
  4. APHA (American Public Health Association) (1999); Standard methods for the examination of water and wastewater. Washington DC: American Public Health Association.
  5. ATSDR (1999a); Toxicological profile for cadmium and nickel. Agency for toxic substances and disease registry, US department of health and human services, public health service. 205-93-0606.
  6. ATSDR (1999b); Toxicological Profile for Lead. Agency for Toxic Substances and Disease Registry, US Department of Health and Human Services, Public Health Service. 205-93-0606.
  7. Awasthi, S. K. (2000); Prevention of food adulteration act no 37 of 1954. Central and state rules as amended for 1999 (3rd ed.). New Delhi: Ashoka Law House.,%201954.pdf
  8. Baker D. E., Senef J. P. (1995); Copper. In: Alloway BJ (ed), Heavy metals in soils, pp.179-205. Blackie Academic and Professional, London. DOI:
  9. Brooks R. R. (1998); Plants that hyperaccumulate heavy metals. CAB International, Wallingford, 84.
  10. Cadmium exposure and humans. 8th International cadmium Conference, 10–13 November, 2011. Kunming, China. accessed 12 July, 2012.
  11. Campos V. M., Merino I., Casado R., Pacios L. F., Gómez L. (2008); Review, Phytoremediation of organic pollutants; Spanish Journal of Agricultural Research, 6 (Special issue), 38-47. DOI:
  12. Demirezen, D., Ahmet, A. (2006); Heavy metal levels in vegetables in Turkey are within safe limits for Cu, Zn, Ni and exceeded for Cd and Pb, J. Food Qual., 29:252-265. DOI:
  13. Dhir B. (2010); Use of aquatic plants in removing heavy metals from wastewater. Int. J. Environ. Eng. 2(1/2/3):185–201. DOI:
  14. Dhir B., (2013); Phytoremediation: Role of Aquatic Plants in Environmental Clean- Up; Springer India; India. DOI:
  15. Mahapatra D M, Chanakya H.N., Ramachandra. T.V, (2013); Treatment efficacy of algae-based sewage treatment plants, Environmental Monitoring and Assessment, pp. 1-20. DOI:
  16. European Union. (2002); Heavy metals in wastes—European Commission on Environment.
  17. FAO (1985); Water quality for agriculture; Irrigation and Drainage, Paper 29 Rev 1, FAO, Rome, p. 174.
  18. Farooq M., Anwar F., Rashid U. (2008); Appraisal of heavy metal contents in different vegetables grown in the vicinity of an industrial area, Pak. J. Bot., 40(5):2009-2016.
  19. Fox L. J., Struik P. C., Appleton B. L., Rule J. H. (2008); Nitrogen Phytoremediation by Water Hyacinth (Eichhornia crassipes (Mart.) Solms); Water Air Soil Pollut 194:199–207. DOI:
  20. Guertin, J., Jacobs, J. A., Avakian, C. P. (2004); Chromium (VI), Handbook (p. 800). Boca Raton: CRC Press. DOI:
  21. Gupta N., Khan D. K., Santra S. C. (2012); Heavy metal accumulation in vegetables grown in long-term wastewater-irrigated agricultural land of tropical India; Environ Monit Assess 184:6673–6682. DOI:
  22. Hopkins W. G., Norman P. A. Huner (2009); Introduction to plant physiology, 4th edition, John Wiley and Sons; page- 54. ISBN: 978-0-470-24766-2
  23. Jackson, A. P., Alloway, B. J. (1991); The transfer of cadmium from sewage-sludge amended soils into the edible components of food crops, Water, Air and Soil Pollution, 57-58(1):873-881. DOI:
  24. Jayadev, Puttaiah E. T. (2013); Assessment of heavy metals uptake in leafy vegetables grown on long term wastewater irrigated soil across Vrishabhavathi River, Bangalore, Karnataka, IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT) e-ISSN: 2319-2402, p- ISSN: 2319-2399. Volume 7, Issue 6, PP 52-55. DOI:
  25. Jumbe A. S., Nandini N. (2009); Impact assessment of heavy metals pollution of Varthur Lake, Bangalore; Journal of Applied and Natural Science 1(1): 53-61. DOI:
  26. Luo C., Liu C., Yan Wang, Xiang Liu, Fangbai Li, Gan Zhang, Xiangdong Li (2011); Heavy metal contamination in soils and vegetables near an e-waste processing site, south China; Journal of Hazardous Materials 186 481–490 DOI:
  27. Mahapatra, D.M., Chanakya, H.N., Ramachandra, T.V. (2011) Assessment of treatment capabilities of Varthur Lake, Bangalore, India, Int. J. Environmental Technology and Management, Vol. 14, Nos. 1/2/3/4, pp.84–102. DOI:
  28. Marschner H (1995); Mineral nutrition of higher plants; Academic, San Diego, p 889.
  29. Meagher R. (2000): Phytoremediation of toxic elemental and organic pollutants; Curr. Opin. Plant Bio 3(2) 153-162. DOI:
  30. Monu, A., Bala, K., Shweta, R., Anchal, R., Barinder, K., Neeraj, M. (2008); Heavy metal accumulation in vegetables irrigated with water from different sources. Environmental Monitoring and Assessment 186(1), DOI:
  31. Morgan, S. (2010); Food sources of chromium.
  32. Mitsch W. J., Gosselink J. G. (2000); Wetlands, 2nd Ed., Van Nostrand Reinhold, U. S. A. DOI:
  33. Naser H. M., N., Shil, C. N., Mahmud, U. M., Rashid, H. Hossain, K. M. (2009), “Lead, cadmium and nickel contents of vegetables grown in industrially polluted and non-polluted areas of Bangladesh”, Bangladesh J. Agri. Res., 34(4):545-554. DOI:
  34. Passatore L., Rossetti S., Asha A. Juwarkar, Angelo Massacci (2014); Phytoremediation and bioremediation of polychlorinated biphenyls (PCBs): State of knowledge and research perspectives; Journal of Hazardous Materials 278, 189–202. DOI:
  35. Pescod, M. B. (1992); Wastewater treatment and use in agriculture. FAO Irrigation and Drainage Paper 47. Rome: Food and Agriculture Organization of the United Nations.
  36. Ramachandra T V, Asulabha K S, Bharath H. Aithal, Bharath Settur, Durga Madhab Mahapatra, Gouri Kulkarni, Harish R. Bhat, Sincy Varghese, Sudarshan P. Bhat, Vinay S. (2014); Environment Monitoring in the Neighbourhood, ENVIS Technical Report 77, Environmental Information System, CES, Indian Institute of Science, Bangalore 560012.
  37. Ramachandra T. V., Alakananda B., Ali Rani, Khan M. A. (2011); Ecological and Socio-Economic Assessment of Varthur Wetland, Bengaluru (India); J Environ Science and Engg. Vol 53 No. 1, 101-108. PMID: 22324154
  38. Ramachandra T.V., Durga Madhab Mahapatra, Sudarshan P. Bhat, Asulabha K.S., Sincy Varghese, Bharath H. Aithal, (2014). Integrated Wetlands Ecosystem: Sustainable Model to Mitigate Water Crisis in Bangalore, ENVIS Technical Report 76, Environmental Information System, CES, Indian Institute of Science, Bangalore 560012.
  39. Ramesh H. L., Murthy V. N. Y. (2012); Assessment of Heavy Metal Contamination in Green Leafy Vegetables Grown in Bangalore Urban District of Karnataka, Advances in Life Science and Technology, ISSN 2224-7181 Vol 6.
  40. Rungwa S., Arpa G., Sakulas H., Harakuwe A., Tim D. (2013); Phytoremediation − An Eco-Friendly and Sustainable Method of Heavy Metal Removal from Closed Mine Environments in Papua New Guinea, Procedia Earth and Planetary Science 6 269 – 277. DOI:
  41. Sharma R. K., Agrawal M., Marshall F. M. (2009); Heavy metals in vegetables collected from production and market sites of a tropical urban area of India; Food and Chemical Toxicology 47 583–591. DOI:
  42. Sun Z., Chen J., Wang X., Lv C. (2016); Heavy metal accumulation in native plants at a metallurgy waste site in rural areas of Northern China; Ecological Engineering 86 60–68. DOI:
  43. 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. DOI:
  44. Taiz L., Zeiger E. (2003); Plant Physiology, 3rd edition; Sinauer Associates, Annals of Botany Company. DOI:
  45. Todd, G. C. (1996); Vegetables grown in mine wastes, Environmental Toxicology and Chemistry, 19(3), 600–607.
  46. Varalakshmi L. R., Ganeshamurthy A. N. (2010); Heavy metal contamination of water bodies, soils and vegetables in urban areas of Bangalore city of India; 19th World Congress of Soil Science, Soil Solutions for a Changing World.
  47. Wang J., Liu R., Ling M., Yu P., Tang A. (2010); Heavy Metals Contamination and its Sources in the Luoyuan Bay; Procedia Environmental Sciences 2 1188–1192. DOI:
  48. Wierzbica, M. (1995); How lead loses its toxicity to plants. Acta Societatis Botanicorum Poloniae, 64, 81–90. DOI:
  49. Ye W-L., Khan M. A., McGrath S. P., Zhao F. J. (2011); Phytoremediation of arsenic contaminated paddy soils with Pteris vittata markedly reduces arsenic uptake by rice; Environmental Pollution 159 3739-3743. DOI: