Kathrin Hölzer

Kathrin Hölzer
Stadtentwässerung und Umweltanalytik Nürnberg

Dr. rer. nat.

About

17
Publications
4,255
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577
Citations
Citations since 2017
1 Research Item
468 Citations
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2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080

Publications

Publications (17)
Article
Micropollutants are frequently detected in groundwater. Thus, the question arises whether they are eliminated by natural attenuation so that pesticide degradation would be observed with increasing residence time in groundwater. Conventional analytical approaches rely on parent compound/metabolite ratios. These are difficult to interpret if metaboli...
Article
Full-text available
Unconventional natural gas development (UNGD) generates large volumes of wastewater, the detailed composition of which must be known for adequate risk assessment and treatment. In particular, transformation products of geogenic compounds and disclosed additives have not been described. This study investigated six Fayetteville Shale wastewater sampl...
Article
Much interest is directed at the chemical structure of hydraulic fracturing (HF) additives in unconventional gas exploitation. To bridge the gap between existing alphabetical disclosures by function / CAS number and emerging scientific contributions on fate and toxicity, we review the structural properties which motivate HF applications, and which...
Thesis
In den letzten Jahren fand insbesondere in den USA eine rasante Ausweitung der unkonventionellen Erdgasförderung, zumeist von Schiefergas, statt. Zusammen mit der exponentiell steigenden Fördermenge erhöhten sich sowohl Unfälle z.B. in Form von Leckagen als auch die Menge des anfallenden Abwassers, welches mit organischen Schadstoffen kontaminiert...
Article
Full-text available
Significance Organic compounds found in drinking water aquifers above the Marcellus Shale and other shale plays could reflect natural geologic transport processes or contamination from anthropogenic activities, including enhanced natural gas production. Using analyses of organic compounds coupled with inorganic geochemical fingerprinting, estimates...
Article
Volumes of natural gas extraction-derived wastewaters have increased sharply over the past decade, but the ultimate fate of those waste streams is poorly characterized. Here, we sought to (a) quantify natural gas residual fluid sources and endpoints to bound the scope of potential waste stream impacts and (b) describe the organic pollutants dischar...
Article
Unconventional natural gas development via horizontal drilling and hydraulic fracturing has greatly increased the supply of natural gas in the United States. However, the practice presents concerns about the possibility for impacts on shallow groundwater aquifers. The Deep River Triassic Basin in central North Carolina is likely to contain natural...
Article
Encouraged by new regulatory requirements for pesticide registration and authorization, the transport and environmental fate of these compounds in the different environmental compartments has been studied extensively. Degradation rates vary widely depending on hydraulic and chemical characteristics, with the strongest degradation usually occuring i...
Article
Environmental degradation of organic micropollutants is difficult to monitor due to their diffuse and ubiquitous input. Current approaches—concentration measurements over time, or daughter-to-parent compound ratios—may fall short, because they do not consider dilution, compound-specific sorption characteristics or alternative degradation pathways....
Article
Oberflächennahe Geothermie ist eine sich rasant entwickelnde Technologie, deren Einfluss auf die Ökologie unterirdischer aquatischer Lebensräume bisher nicht ausreichend untersucht wurde. Dabei sind biologische Prozesse maßgeblich von der Temperatur beeinflusst. In Feld- und Laboruntersuchungen, die Temperaturveränderungen von 2 bis 45 °C umfassten...
Article
Today, the use of geothermal energy is strongly promoted as an alternative and sustainable source of energy. However, regarding the authorization, regulation and monitoring of such facilities with respect to possible environmental impacts, a severe lack of knowledge has been identified. Aquifers are not only abiotic reservoirs of water and sediment...

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