Occurrence of Emerging Micropollutants in Water Systems in Gauteng, Mpumalanga, and North West Provinces, South AfricaReportar como inadecuado


Occurrence of Emerging Micropollutants in Water Systems in Gauteng, Mpumalanga, and North West Provinces, South Africa


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Nanotechnology and Water Sustainability Research Unit, College of Science Engineering and Technology, University of South Africa, P.O. Box 392, UNISA 003, Florida, Roodepoort 1709, Johannesburg, South Africa





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Academic Editor: Emmanuelle Vulliet

Abstract The ubiquitous occurrence of emerging micropollutants EMPs in water is an issue of growing environmental-health concern worldwide. However, there remains a paucity of data regarding their levels and occurrence in water. This study determined the occurrence of EMPs namely: carbamazepine CBZ, galaxolide HHCB, caffeine CAF, tonalide AHTN, 4-nonylphenol NP, and bisphenol A BPA in water from Gauteng, Mpumalanga, and North West provinces, South Africa using comprehensive two-dimensional gas chromatography coupled to high resolution time-of-flight mass spectrometry GCxGC-HRTOFMS. Kruskal-Wallis test and ANOVA were performed to determine temporal variations in occurrence of the EMPs. Principal component analysis PCA and Surfer Golden Graphics software for surface mapping were used to determine spatial variations in levels and occurrence of the EMPs. The mean levels ranged from 11.22 ± 18.8 ng-L for CAF to 158.49 ± 662 ng-L for HHCB. There was no evidence of statistically significant temporal variations in occurrence of EMPs in water. Nevertheless, their levels and occurrence vary spatially and are a function of two principal components PCs, PC1 and PC2 which controlled 89.99% of the variance. BPA was the most widely distributed EMP, which was present in 62% of the water samples. The detected EMPs pose ecotoxicological risks in water samples, especially those from Mpumalanga province. View Full-Text

Keywords: drinking water; emerging micropollutants; GCxGC-HRTOFMS; spatial variations; wastewater drinking water; emerging micropollutants; GCxGC-HRTOFMS; spatial variations; wastewater





Autor: Elijah M. M. Wanda, Hlengilizwe Nyoni, Bhekie B. Mamba and Titus A. M. Msagati *

Fuente: http://mdpi.com/



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