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Heavy Metal Contamination of Soil in Preschool Facilities around Industrial Operations, Kuils River, Cape Town (South Africa)

Author

Listed:
  • Busisiwe Shezi

    (Environment and Health Research Unit, South African Medical Research Council, Johannesburg 2094, South Africa
    Department of Environmental Health, Faculty of Health Sciences, University of Johannesburg, Johannesburg 2094, South Africa)

  • Renée Anne Street

    (Department of Environmental Health, Faculty of Health Sciences, University of Johannesburg, Johannesburg 2094, South Africa
    Environment and Health Research Unit, South African Medical Research Council, Durban 4001, South Africa)

  • Candice Webster

    (Environment and Health Research Unit, South African Medical Research Council, Johannesburg 2094, South Africa)

  • Zamantimande Kunene

    (Environment and Health Research Unit, South African Medical Research Council, Johannesburg 2094, South Africa)

  • Angela Mathee

    (Environment and Health Research Unit, South African Medical Research Council, Johannesburg 2094, South Africa
    Department of Environmental Health, Faculty of Health Sciences, University of Johannesburg, Johannesburg 2094, South Africa
    Department of Environmental Health, School of Behavioural and Lifestyle Sciences, Faculty of Health Sciences, Nelson Mandela University, Port Elizabeth 6019, South Africa)

Abstract

The contamination of soil by heavy metals is a potential health risk, especially among susceptible populations. The aim of this study was to measure the levels of heavy metals, identify the contamination levels and possible sources of heavy metals, and evaluate the health risk caused by heavy metals to the children living in Kuils River. Composite samples of soil were collected at 34 preschools. A portable X-ray fluorescence spectrometer was used to measure the levels of metals. Contamination levels were evaluated using a geoaccumulation index (Igeo), enrichment factor (EF), contamination factor (CF) and pollution load index (PLI). The spatial distribution of the Igeo contamination levels was assessed using ArcGIS. Sources of heavy metals and the correlation among metals were assessed using factor analysis and Pearson correlation, respectively. The measured concentrations of metals were used to estimate the health risk for children. The average levels of the metals were 16, 4469, 137, 30, 176, 1547 and 232 mg/kg for arsenic (As), iron (Fe), manganese (Mn), lead (Pb), strontium (Sr), titanium (Ti) and zinc (Zn), respectively. According to Igeo, EF, CF and PLI contamination exist in the study area. The health index (HI) for non-carcinogenic effects showed the ingestion route as the main contributor to the total risk, with the accumulative carcinogenic risk exceeding the maximum acceptable level. To protect the affected communities, and children in particular, this study provides evidence of the need for action, including the institution of mandatory buffer zones between pollutant-generating activities and human settlements.

Suggested Citation

  • Busisiwe Shezi & Renée Anne Street & Candice Webster & Zamantimande Kunene & Angela Mathee, 2022. "Heavy Metal Contamination of Soil in Preschool Facilities around Industrial Operations, Kuils River, Cape Town (South Africa)," IJERPH, MDPI, vol. 19(7), pages 1-14, April.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:7:p:4380-:d:787678
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    References listed on IDEAS

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    1. Caspah Kamunda & Manny Mathuthu & Morgan Madhuku, 2016. "Health Risk Assessment of Heavy Metals in Soils from Witwatersrand Gold Mining Basin, South Africa," IJERPH, MDPI, vol. 13(7), pages 1-11, June.
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