22-27 September 2019
Trade Fairs and Congress Center (FYCMA)
Europe/Madrid timezone

Water quality characterisation and Health risk assessment of Maputland coastal plain, KwaZulu-Natal, South Africa

Not scheduled
15m
Trade Fairs and Congress Center (FYCMA)

Trade Fairs and Congress Center (FYCMA)

Av. de José Ortega y Gasset, 201 29006 Malaga, Spain
Oral Topic 8 - Groundwater quality and pollution processes Parallel

Speaker

Prof. Vetrimurugan Elumalai (University of Zululand)

Description

The living population in the Maputland coastal plain largely depends on the groundwater derived from the unconsolidated aquifers through the shallow household and agricultural wells. Along the entire Maputland coast, around 51 groundwater samples were collected from these active wells and were analysed for major ion and trace elements such as Al, As, Co, Cd, Cu, Fe, Mn, Pb and Zn. Various interpolation methods were applied in the study to understand the suitability of water quality for drinking & irrigation purposes and the evolution of water quality by geochemical characterization. The health risk assessment was also carried out. Rock-water interaction and Na/Ca ion exchange are the dominant processes responsible for the characteristics of the water quality in the study area. The results revealed that the water quality is suitable for irrigation purposes while for the drinking purpose, about 22 %, 2 %, and 7 % of the samples fall under the poor, very poor & unsuitable class respectively, with the spatial distribution seen towards the southern and western part. The health risk assessment interfered that the hazard quotient for ingestion, dermal & hazard index of Co and HQ dermal & hazard index of Cd, As and Mn pose serious to adverse risk to local people on exposure for a longer period while Infants are predicted more vulnerable to health risk than children and adults. The study suggests long term monitoring for health risk and crop yield to minimize the negative impact due to poor water quality.

Primary authors

Ms Philisiwe P Mthembu1 (University of Zululand) Prof. Vetrimurugan Elumalai (University of Zululand) Dr Mohanavelu Senthilkumar (2Central Ground Water Board)

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