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1.
Contaminant trends in urban groundwater: case study from Ljubljana (central Slovenia)
Janja Svetina, Joerg Prestor, Brigita Jamnik, Primož Auersperger, Mihael Brenčič, 2024, izvirni znanstveni članek

Povzetek: Urban areas can significantly alter the quality status of aquifers if appropriate strategies to prevent and detect groundwater contamination are not implemented in time. The prevention of groundwater contamination should be a priority due to its potential long-term impact on the environment and the high cost of remediation. For effective and sustainable groundwater management, it is crucial to proactively monitor a wide range of compounds to prevent their spread, progression and increasing concentrations. This study is one of the few to analyse the trends of various urban groundwater contaminants (nitrate, sulphate, hexavalent chromium, pesticides, PCE and TCE) from a groundwater management perspective. Characteristic trends are assessed using linear regression and the Mann–Kendall method, while significant changes in trends are determined using the Darken and Pettitt tests. The time span of the analysed trends covers the transition period before and after the implementation of the Water Framework Directive (2000/60/EC) and the Groundwater Directive (2000/60/EC). This study confirms the effectiveness of enforcement measures to protect groundwater quality, as evidenced by several statistically significant decreasing trends. On the other hand, this study emphasises the importance of intervention-targeted sampling campaigns and the reporting of raw analytical values according to the ISO 11843 series of standards. This approach is essential to detect upward trends in emerging contaminants at an early stage and prevent them from reaching levels that could negatively impact the economy or even jeopardise the safety of drinking water supplies.
Ključne besede: groundwater contamination, contaminant trends, groundwater management, urban aquifer, Ljubljansko polje
Objavljeno v DiRROS: 25.03.2024; Ogledov: 47; Prenosov: 14
.pdf Celotno besedilo (7,36 MB)

2.
Passive sampling with active carbon fibres in the determination of organic pollutants in groundwater
Primož Auersperger, Anja Koroša, Nina Mali, Brigita Jamnik, 2022, izvirni znanstveni članek

Povzetek: Legislation addressing the quality of groundwater and increasing concerns over public health calls for the development of analytical methods that can produce accurate and precise results at the ppt level. Passive sampling has been recognised as a helpful tool in identifying various organic pollutants in groundwater, even when their presence had not yet been identified through conventional groundwater quality monitoring. The article presents an analytical method involving a simple and cost-effective passive sampling device using Zorflex® activated carbon fibres (ACFs) for the qualitative monitoring of a broad range of organic pollutants in water in a single run. The applicability of the method developed was tested in three hydrogeological studies. In the first case, we present a non-targeted qualitative screening and a list of 892 different contaminants detected in the groundwater in Slovenia. In the second case, we discuss the presence and origin of organic compounds in the groundwater from a pilot area of the urban aquifer, Ljubljansko polje. The third case presents a comparison of results between passive and grab sampling. Passive sampling with ACFs confirmed the presence of a pollutant, even when it had not been previously detected through a quantitative method.
Ključne besede: GC-MS, organic pollutants, qualitative analysis, passive sampling, groundwater
Objavljeno v DiRROS: 03.03.2022; Ogledov: 660; Prenosov: 283
.pdf Celotno besedilo (3,83 MB)

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