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Assessing the influence of human activities on river health: a case for two South African rivers with differing pollutant sources

  • Shaeen Chetty
  • Letitia PillayEmail author
Article
  • 174 Downloads

Abstract

The impact of agricultural and anthropogenic activities can play a significant role in heavy metal precipitation and transport in water. Human activities along two rivers: the Palmiet and Sezela Rivers in KwaZulu-Natal, South Africa, have been classified and metal contamination (Cr, Cu, Pb and Zn) and mobility assessed using a range of factors including contamination and enrichment factors, pollution load indices and water quality parameters. The overall assessment of the Palmiet River, which is characterised by industrial zone (predominantly metal works), followed by residential areas and informal settlements shows significantly elevated metal concentrations with high mobility and bioavailability. In contrast, the Sezela River, characterised by agricultural activities and informal settlements, shows total metal concentrations that pose a limited-to-no threat to human health and very limited metal mobility. The overall environmental assessment indicates that both rivers show deterioration; the Palmiet River has been severely impacted by the type of industrial activity, whereas the Sezela River has been more impacted by agricultural activity. This study highlights the role of different anthropogenic activities on river health and the potential health implications with the associated metal mobility.

Keywords

Heavy metals Bioavailability Pollution load indices Enrichment factors Pollution 

Notes

Acknowledgements

We are grateful for the constructive feedback received from the two anonymous reviewers whose suggestions and comments have greatly improved our manuscript.

Supplementary material

10661_2019_7308_MOESM1_ESM.docx (31 kb)
ESM 1 (DOCX 30 kb)

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Molecular Sciences Institute, School of ChemistryUniversity of the WitwatersrandJohannesburgSouth Africa

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