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A Review: Assessment of Trace Metals in Municipal Sewage and Sludge: A Case Study of Limpopo Province, South Africa

In: Sewage

Author

Listed:
  • Jabulani Gumbo
  • Kudakwashe Shamuyarira

Abstract

Trace metals including nanosilver in our aquatic environment are on the increase in part due to discharge from municipal sewage and indirectly from leaching from abandoned mine tailings and from sludge spread on farmland. The presence of the trace metals will likely impact negatively on the aquatic environment in excess of background levels. This review reports on the concentration of trace metals in municipal sewage in Limpopo province and the impact on fish and human health. Human health risks associated with the consumption of contaminated fish are discussed. The presence of silver is also highlighted and the remedial actions that are available in reducing the health risks including positive outcomes are discussed. The source of silver may be from the use of silver nanoproducts. There is a need for a paradigm shift of zero effluent discharge and start with harvesting of metals from the sewage effluent and sludge in order to protect the environment.

Suggested Citation

  • Jabulani Gumbo & Kudakwashe Shamuyarira, 2018. "A Review: Assessment of Trace Metals in Municipal Sewage and Sludge: A Case Study of Limpopo Province, South Africa," Chapters, in: Ivan X Zhu (ed.), Sewage, IntechOpen.
    • Handle: RePEc:ito:pchaps:133827
    DOI: 10.5772/intechopen.76565
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    File URL: https://www.intechopen.com/chapters/61236
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    More about this item

    Keywords

    trace metals; bioaccumulation; biomagnification; fish consumption; human health;
    All these keywords.

    JEL classification:

    • Q53 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Air Pollution; Water Pollution; Noise; Hazardous Waste; Solid Waste; Recycling

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