Impact of Heavy Metals on the Environment and Human Health: A Comparative Analysis of Two Mining Communities in Niger State, Nigeria.

Unregulated mining of precious metals has led to pollution in the environment and food chain, as well as outbreaks of poisoning in affected communities. However, there is limited evidence on the effect of heavy metals on the environment and health of communities in north-central Nigeria. This study investigated the comparative presence and concentration of some heavy metals, namely, arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), iron (Fe), mercury (Hg), nickel (Ni), lead (Pb) and zinc (Zn) in various samples collected from water sources, soils, staple food cultivars, and blood samples of inhabitants around Kataeregi and Kurebe mining communities in Niger State, Nigeria. The samples were collected using standard methods and digested using a tri-acid mixture and concentration of heavy metals was determined using Atomic Absorption Spectrometry (AAS). The analysis revealed the water and soil samples only showed exceeding levels in As, 0.017 mg/L; Hg, 0.014 mg/L; Pb, 0.004 mg/L; and As, 37.2 mg/kg, Cd, 6.7 mg/kg, and Hg, 1.1 mg/kg, respectively, in Kataeregi; and Cd, 0.023 mg/L; Hg, 0.012; and Hg, 0.315 mg/kg, respectively, in Kurebe. Heavy metal concentrations in staple food cultivars consumed at both mining sites were found to be within the permissible levels set by the WHO/FAO, except for As (1.72:1.82 mg/kg), Cd (0.41:0.09 mg/kg), Ni (0.41 mg/kg) and Hg (0.71 mg/kg) in cereals and vegetables from Kataeregi, and As (1.56 mg/kg), Hg (2.09 mg/kg), in legumes and Cd (0.43 mg/kg) in tubers from Kurebe. Also, significant elevations in the blood Pb, 11.2 µg/L; Hg, 11.1 µg/L; urea, 8.43 mmol/L and creatinine, 1.61 mg/dL and a decreased mean hemoglobin (Hb) concentration (67.1%, 9.8±2.3 g/dL, P<0.05) was observed in samples from Kataeregi. Attributing the compromised renal functioning and hematologic impairment to the accumulation of toxic heavy metals, as evident in the clinical manifestation of inhabitants in both mining sites. Alternative safe drinking water sources, continuously monitoring, sensitization and assessment on the potential health risks and profiles are highly advocated for in this community; additionally, nanobioremediation approaches are needed to clean up polluted farmlands and waters to reduce heavy metal contamination in the food chain and the associated health risks.

heavy metals; mining; outbreak; poisoning

1. Abdulkareem, J. H., Abdulkadir, A. & Abdu, N.(2015). Vertical distribution of lead (Pb) in farmlands around contaminated goldmine in Zamfara state, Northern Nigeria. African Journal of Agricultural Research,10(53), pp. 4975 4989. [Google Scholar] [Crossref]

2. Adewumi, A. J. (2020). Contamination, sources and risk assessments of metals in media from Anka artisanal gold mining area, Northwest Nigeria. Science of the Total Environment, 718, 137235. [Google Scholar] [Crossref]

3. Agency for Toxic Substances and Disease Registry (ATSDR) (2016). Priority List of Hazardous Substances. Retrieved from http://www.atsdr.cdc.gov/SPL/index.html [Google Scholar] [Crossref]

4. Akpanowo, M. A., Bello, N. A., Umaru, I., Iyakwari, S., Joshua, E., Yusuf, S., & Ekong, G. B. (2021). Assessment of radioactivity and heavy metals in water sources from Artisanal mining areas of Anka, Northwest Nigeria. Scientific African, 12, e00761. [Google Scholar] [Crossref]

5. Bello, O., Naidu, R., Rahman, M. M., Liu, Y. & Dong, Z. (2016). Lead concentration in the blood of the general population living near a lead–zinc mine site, Nigeria: Exposure pathways, Science of The Total Environment, 542, 908-914. https://doi.org/10.1016/j.scitotenv.2015.10.143 [Google Scholar] [Crossref]

6. Bhatia, R. K., & Sakhuja, D. (2020). Renewable energy products through bioremediation of wastewater. Sustainability, 12(18), 7501. [Google Scholar] [Crossref]

7. Bioavailability and bacterial degradation rates of dissolved organic matter in a temperate coastal area during an annual cycle, Marine Chemistry,113(3–4), 219-226. [Google Scholar] [Crossref]

8. Centers for Disease Control and Prevention (CDC). Fourth Report on Human Exposure to Environmental Chemicals, Updated Tables, (March 2021). Atlanta, GA: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention. https://www.cdc.gov/exposurereport/ [Google Scholar] [Crossref]

9. Chiroma, S. M., Baharuldin, M. T. H., Taib, M., Norma, C., Amom, Z., Jagadeesan, S., Ilham Adenan, M., Mahdi, O. & Moklas, M. A. M. (2019). Centella asiatica Protects d-Galactose/AlCl3 Mediated Alzheimer’s Disease-Like Rats via PP2A/GSK-3β Signaling Pathway in Their Hippocampus. International journal of molecular sciences, 20(8), p.1871. [Google Scholar] [Crossref]

10. Cornelis, R., Melaku, S., Vanhaecke, F., Dams, R., & Moens, L. (2005). Method development for the speciation of chromium in river and industrial wastewater using GFAAS. Microchimica Acta, 150, 225-231. DOI:10.5897/AJAR2015.10068 [Google Scholar] [Crossref]

11. Enyoh, C. E. & Isiuku, B. O. (2020). Determination and Human Health Risk Assessment of Heavy Metals in Foodbasin Soils in Owerri, Southeastern Nigeria. Chemistry Africa, 3, 1059-1071. https://doi.org/10.1007/s42250-020-00171-2 [Google Scholar] [Crossref]

12. Fashae, O. A., Jolaade, O., & Adeyemi, O. (2018). An Assessment of Digital Elevation Model for Geospatial Studies: A Case Study of Alawa Town, Niger State, Nigeria. Ife Research Publications in Geography, 15(1), 31-51. [Google Scholar] [Crossref]

13. Ghori, Z., Iftikhar, H., Bhatti, M. F., Nasar-um-Minullah, Sharma, I., Kazi, A. G., et al. (2016). “Phytoextraction: The use of plants to remove heavy metals from the soil,” in Plant metal interaction: Emerging remediation techniques: Elsevier, 385–409. [Google Scholar] [Crossref]

14. Jonathan, M. P., Chung, S.Y., Venkatramanan, S., & Park, N. (2014). Evaluation of physico-chemical parameters in water and total heavy metals in sediments at Nakdong River Basin, Korea. Environ Earth Sci., 75, 50. https://doi.org/10.1007/s12665-015-4836-2. [Google Scholar] [Crossref]

15. Kabir A. S., Mohammed S. H., Muazu A. A. & Aishatu M. K. (2017).Assessment of heavy metals contamination of soil and water around abandoned Pb-Zn mines in Yelu, Alkaleri Local Government Area of Bauchi State, Nigeria.International Research Journal of Public and Environmental Health Vol.4 (5),pp. 72-77. [Google Scholar] [Crossref]

16. Kaur, P., Kumar, V., Sharma, A., Sidhu, G. P. S., Bali, A. S., Bhardwaj, R., ... & Cerda, A. (2019). Pollution assessment of heavy metals in soils of India and ecological risk assessment: A state-of-the-art. Chemosphere, 216, 449-462. [Google Scholar] [Crossref]

17. Liang, B., Han, G., Liu, M., Yang, K., Li, X., & Liu, J. (2018). Distribution, sources, and water quality assessment of dissolved heavy metals in the Jiulongjiang River water, Southeast China. International journal of environmental research and public health, 15(12), 2752. [Google Scholar] [Crossref]

18. Latif, A., Bilal, M., Asghar, W., Azeem, M., Ahmad, M. I., Abbas, A., ... & Shahzad, T. (2018). Heavy metal accumulation in vegetables and assessment of their potential health risk. Journal of Environmental Analytical Chemistry, 5(234), 2380-2391. [Google Scholar] [Crossref]

19. Liman, M. G., Lawal, H., Tsafe, A. I., & Ahmad, J. A. (2021). Potential Heavy Metals Pollution in Soil of Some Selected Goldsmith Workshops in Gusau, Zamfara State. International Journal of Science for Global Sustainability, 7(1), 6-6. [Google Scholar] [Crossref]

20. Lønborg, C., Davidson, K., Xosé A. A, A. & Miller, E. J. (2009). Bioavailability and bacterial degradation rates of dissolved organic matter in a temperate coastal area during an annual cycle, Marine Chemistry, 113(3–4), 219-226, [Google Scholar] [Crossref]

21. Mafuyai, G, M., Eneji, I. S., Sha’Ato, R. & Nnamonu, L. A. (2019). Heavy metals in soil and vegetables irrigated with ex- tin mining ponds water in Barkin-Ladi Local Government Area Plateau State, Nigeria. Agriculture and Food Sciences Research, 6(2), pp. 211-220. [Google Scholar] [Crossref]

22. Mallo, S. J. (2012). The Socio-Economic Impact of Artisanal Mining in Kuru (Naraguta Sheet 168) Plateau State, North Central Nigeria. [Google Scholar] [Crossref]

23. Mombeshora, C., Osinbanjo, O., and Ajayi, S. O. (2013). Pollution studies on Nigerian rivers: the onset of lead pollution of surface waters in Ibadan. Environ. Int., 9, 81-84. [Google Scholar] [Crossref]

24. National Population Commission [NPC] (2006). Nigeria National Census: Population Distribution by Sex, State, LGAs and Senatorial District: 2006 Census Priority Tables (Vol. 3). http://www.population.gov.ng/index.php/publication/140-popn-distri-by-sex-state-jgas-and-senatorial-distr-2006 [Google Scholar] [Crossref]

25. Nigeria Meteorological Agency (NMA) Abuja Nigeria, Administrative Division City Population. Nigeria Climate Review Bulletin. Retrieved 28 November 2014. [Google Scholar] [Crossref]

26. Nimyel, S. H., & Namadi, M. M. (2020). Assessment of the level of heavy metal concentration in the street dust in some selected locations in zaria metropolis, kaduna state, nigeria. Fudma journal of sciences, 4(3), 93-98. [Google Scholar] [Crossref]

27. Noor, F. A. M., Elias, S. M., Aris, A. Z., Bakar, S. A., & Zulkifli, H. M. (2019). Determination of Arsenic and Lead Level in Blood of Adults from Coastal Community in Melaka, Malaysia. Malaysian Journal of Medicine & Health Sciences, 15. [Google Scholar] [Crossref]

28. O’Neill, J. D. & Telmer, K. (2017). Estimating Mercury Use and Documenting Practices in Artisanal and Small-scale Gold Mining (ASGM). Geneva, Switzerland: UN Environment. ISBN 978-0-9939459-8-4. [Google Scholar] [Crossref]

29. Obaje, N. G., Umar, M. U., Aweda, K. A. & Ozoji, T. M. (2018). Mining of Mineral Deposits and the Impacts on Livelihood in Niger State. Lapai Journal of Economics, 2(2),1-14. [Google Scholar] [Crossref]

30. Obasi PN, Akudinobi BEB (2019b) Heavy metals occurrence, assessment and distribution in water resources in the lead–zinc mining areas of Abakaliki, Southeastern Nigeria. Springer—Int J Environ Sci Technol. https://doi.org/10.1007/s13762-019-02489-y [Google Scholar] [Crossref]

31. Omanayin, Y. A., Ogunbajo, M. I ., Waziri, N. M., Ako, T. A1 ., Shuaibu, A. M. & Alaku, I. O (2016). Geochemical Investigation and Physical Impact Assessment of Artisanal Gold Mining, Kataeregi, North-Central Nigeria. International Journal of Science and Global Sustainability, 2(2), 21-35. [Google Scholar] [Crossref]

32. Orisakwe, O. E., Dagur, E. A., Mbagwu, H. C. & Udowelle, N. A.(2017). Lead levels in vegetables from artisanal mining sites of Dilimi River, Bukuru and BarkinLadi North Central Nigeria: Cancer and Non-Cancer Risk Assessment. Asian Pacific Journal of Cancer Prevention, 18:3, 621-627 [Google Scholar] [Crossref]

33. Omondi, G. Z. O., Nyamari, J., & Mugo, J. (2023). Mercury Levels in Groundwater near Artisanal Small-Scale Gold Mines in Migori County, Kenya. East African Journal of Environment and Natural Resources, 6(1), 421-431. [Google Scholar] [Crossref]

34. Prasad, S., Saluja, R., Joshi, V., & Garg, J. K. (2020). Heavy metal pollution in surface water of the Upper Ganga River, India: human health risk assessment. Environmental Monitoring and Assessment, 192(11), 742. [Google Scholar] [Crossref]

35. Sani, H. S., & Amanabo, M. (2021). Lead: A concise review of its toxicity, mechanism and health effect. GSC Biological and Pharmaceutical Sciences, 15(1), 055-062. [Google Scholar] [Crossref]

36. Tegegne, W. A. (2015). Assessment of some heavy metals concentration in selected cereals collected from local markets of Ambo City, Ethiopia. Journal of Cereals and Oilseeds, 6(2), 8-13. [Google Scholar] [Crossref]

37. Tilako1,B. H., Fred C. O., Bassey E.& Elvis N. S. (2019). Blood-Lead levels among Inhabitants of Enyigba Lead-Zinc Mining Community of Ebonyi State, Nigeria: Indications of Occupational and Environmental Health Hazards. Adv Clin Toxicol , 4(3): 000162. [Google Scholar] [Crossref]

38. Toyomaki, H., Yabe, J. Shouta M. M., Nakayama, Y., Yohannes, B., Kaampwe Muzandu, K., Mufune, T., Hokuto N., Yoshinori I., Takeshi K., Mitsuhiro N., Choongo, K., Ishizuka. M. (2021). Lead concentrations and isotope ratios in blood, breastmilk and feces: contribution of both lactation and soil/dust exposure to infants in a lead mining area, Kabwe, Zambia, Environmental Pollution, 286, 117456. [Google Scholar] [Crossref]

39. Wahl, A. M., Rakete, S., Moonga, G., Mambrey, V., Shoko, D., Moyo, D., ... & Bose-O’Reilly, S. (2022). Biomonitoring of arsenic, cadmium and lead in two artisanal and small-scale gold mining areas in Zimbabwe. Environmental Science and Pollution Research, 29, 4762-4768. [Google Scholar] [Crossref]

40. WHO/FAO. Joint FAO/WHO (2007). food standard programme codex alimentarius commission 13th session. Report of the Thirty Eight Session of the Codex Committee on Food. [Google Scholar] [Crossref]

41. World Health Organization (WHO) (2011). Guidelines for drinking water quality, 3rd edn. World Health Organization, Geneva. [Google Scholar] [Crossref]

42. World Health Organization (WHO) (2017). Mercury and Health. World Health Organization, Geneva. [Google Scholar] [Crossref]

43. Yahaya, S. M., Mahmud, A. & Abdu, N. (2022). Heavy Metals Source Apportionment and Human Health Risk Assessment of Contaminated Soils of Zamfara State, Nigeria. Agro Bali Agricultural Journal. 5, 199-218. 10.37637/ab.v5i2.897. [Google Scholar] [Crossref]

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