Licha, Tobias

[["dc.bibliographiccitation.firstpage","289"],["dc.bibliographiccitation.journal","The Science of The Total Environment"],["dc.bibliographiccitation.lastpage","298"],["dc.bibliographiccitation.volume","454"],["dc.contributor.author","Hillebrand, Olav"],["dc.contributor.author","Musallam, Shadha"],["dc.contributor.author","Scherer, Laura"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Licha, Tobias"],["dc.date.accessioned","2018-11-07T09:24:13Z"],["dc.date.available","2018-11-07T09:24:13Z"],["dc.date.issued","2013"],["dc.description.abstract","Water sample storage and stabilisation may affect data quality, if samples are managed improperly. In this study three stabilising strategies are evaluated for 46 relevant organic micro-pollutants: addition of the biocides (i) copper sulphate and (ii) sodium azide to water samples directly after sampling with subsequent sample storage as liquid phase and (iii) direct solid phase extraction (SPE), stabilising the samples by reducing the activity of water. River water and treated effluent were chosen as commonly investigated matrices with a high potential of biotransformation activity. Analyses were carried out for sample storage temperatures of 4 and 28 degrees C for water samples stored as liquid phase and for sample storage temperatures of 4, 20 and 40 degrees C for SPE cartridges. Cooling of water samples alone was not sufficient for longer storage times (>24 h). While copper sulphate caused detrimental interferences with nitrogen containing heterocyclic compounds, sodium azide proved to be a suitable stabilising agent. The best results could be obtained for SPE cartridges stored cool. Recommendations for samples preservation are provided. (C), 2013 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.scitotenv.2013.03.028"],["dc.identifier.isi","000319180000031"],["dc.identifier.pmid","23562683"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29770"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0048-9697"],["dc.title","The challenge of sample-stabilisation in the era of multi-residue analytical methods: A practical guideline for the stabilisation of 46 organic micropollutants in aqueous samples"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","240"],["dc.bibliographiccitation.journal","The Science of The Total Environment"],["dc.bibliographiccitation.lastpage","250"],["dc.bibliographiccitation.volume","512"],["dc.contributor.author","Valhondo, Cristina"],["dc.contributor.author","Carrera, Jesus"],["dc.contributor.author","Ayora, Carlos"],["dc.contributor.author","Tubau, Isabel"],["dc.contributor.author","Martinez-Landa, Lurdes"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Licha, Tobias"],["dc.date.accessioned","2018-11-07T09:58:31Z"],["dc.date.available","2018-11-07T09:58:31Z"],["dc.date.issued","2015"],["dc.description.abstract","A permeable reactive layer was installed at the floor of an infiltration basin. The reactive layer comprised 1) vegetable compost to provide a sorption surface for neutral organic compounds and to release easily degradable organic matter, thus generating a sequence of redox states, and 2) minor amounts of clay and iron oxide to increase sorption of cationic and anionic species, respectively. Field application of this design was successful in generating denitrification, and manganese-, and iron-reducing conditions beneath the basin. This, together with the increase in types of sorption sites, may explain the improved removal, of three of the four selected pharmaceuticals compared with their behavior prior to installation of the layer. After installation of the reactive layer, atenolol concentrations were below the detection limits in the vadose zone. Moreover, concentrations of gemfibrozil and cetirizine were reduced to 20% and 40% of their initial concentrations, respectively, after 200 h of residence time. In contrast, prior to installation of the reactive layer, the concentrations of these three pharmaceuticals in both the vadose zone and the aquifer were more than 60% of the initial concentration. Carbamazepine exhibited recalcitrant behavior both prior to and after the reactive barrier installation. (C) 2015 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.scitotenv.2015.01.030"],["dc.identifier.isi","000351248500026"],["dc.identifier.pmid","25625636"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37377"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1879-1026"],["dc.relation.issn","0048-9697"],["dc.title","Characterizing redox conditions and monitoring attenuation of selected pharmaceuticals during artificial recharge through a reactive layer"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","251"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Grundwasser"],["dc.bibliographiccitation.lastpage","262"],["dc.bibliographiccitation.volume","19"],["dc.contributor.author","Reh, Roland"],["dc.contributor.author","Hillebrand, Olav"],["dc.contributor.author","Geyer, Tobias"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Sauter, Martin"],["dc.date.accessioned","2018-11-07T09:32:14Z"],["dc.date.available","2018-11-07T09:32:14Z"],["dc.date.issued","2014"],["dc.description.abstract","In the presented work the occurrence of organic micro-pollutants is discussed for two karst areas with different geological characteristics and land-use patterns. Within an urban moderately karstified catchment with a large number of local input sources (e.g. contaminated sites, sewer leakages), a greater variety of micro-pollutants is found compared to a rural area. Mostly the concentrations of these compounds decrease below quantification limits before emerging at the spring and can therefore only be detected by a comprehensive network of sampling points. Springs show the presence of micro-pollutants, either recently applied in large amounts or characterized by high persistence. At the outlet of a highly karstified and consequently highly permeable aquifer readily biodegradable compounds are detected. Due to high groundwater flow velocities investigations of micro-pollutants require a highly resolved monitoring. Therefore, beside substance properties, also hydrogeological characteristics affect the spectrum of detectable micro-pollutants."],["dc.identifier.doi","10.1007/s00767-014-0264-6"],["dc.identifier.isi","000345078800003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31709"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","Heidelberg"],["dc.relation.issn","1432-1165"],["dc.relation.issn","1430-483X"],["dc.title","Application of organic micro-pollutants for the characterisation of two karst systems"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","395"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Water Research"],["dc.bibliographiccitation.lastpage","402"],["dc.bibliographiccitation.volume","46"],["dc.contributor.author","Hillebrand, Olav"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Sauter, Martin"],["dc.contributor.author","Geyer, Tobias"],["dc.date.accessioned","2018-11-07T09:14:02Z"],["dc.date.available","2018-11-07T09:14:02Z"],["dc.date.issued","2012"],["dc.description.abstract","Contamination from untreated wastewater leakage and related bacterial contamination poses a threat to drinking water quality. However, a quantification of the magnitude of leakage is difficult. The objective of this work is to provide a highly sensitive methodology for the estimation of the mass of untreated wastewater entering karst aquifers with rapid recharge. For this purpose a balance approach is adapted. It is based on the mass flow of caffeine in spring water, the load of caffeine in untreated wastewater and the daily water consumption per person in a spring catchment area. Caffeine is a source-specific indicator for wastewater, consumed and discharged in quantities allowing detection in a karst spring. The methodology was applied to estimate the amount of leaking and infiltrating wastewater to a well investigated karst aquifer on a daily basis. The calculated mean volume of untreated wastewater entering the aquifer was found to be 2.2 +/- 0.5 m(3) d(-1) (undiluted wastewater). It corresponds to approximately 0.4% of the total amount of wastewater within the spring catchment. (C) 2011 Elsevier Ltd. All rights reserved."],["dc.description.sponsorship","German Federal Ministry of Education and Research [02WM1081, 02WRS1277A]"],["dc.identifier.doi","10.1016/j.watres.2011.11.003"],["dc.identifier.isi","000299609400014"],["dc.identifier.pmid","22104295"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27307"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0043-1354"],["dc.title","Caffeine as an indicator for the quantification of untreated wastewater in karst systems"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","5381"],["dc.bibliographiccitation.issue","16"],["dc.bibliographiccitation.journal","Water Research"],["dc.bibliographiccitation.lastpage","5388"],["dc.bibliographiccitation.volume","46"],["dc.contributor.author","Hillebrand, Olav"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Sauter, Martin"],["dc.contributor.author","Geyer, Tobias"],["dc.date.accessioned","2018-11-07T09:04:37Z"],["dc.date.available","2018-11-07T09:04:37Z"],["dc.date.issued","2012"],["dc.description.abstract","Little is known with respect to the attenuation capacity of karst aquifers. Even less is known about the risk posed by emerging micropollutants in these systems. In order to identify the attenuation potential of karst aquifers in-situ and to estimate the risk posed by micropollutants, a dualtracer test was conducted in this study in order to investigate differential transport in the subsurface: The reactive compound caffeine was used as a tracer to indicate the attenuation capacity within the aquifer in-situ. Due to the low limit of quantification, only small amounts of caffeine needed to be injected. To calibrate a model and to visualize the attenuation of caffeine a conservative reference tracer (uranine) is injected simultaneously. The methodology is tested in a well-characterised karst system in southwest Germany. The results indicate a significantly higher attenuation rate than was expected for karst aquifers. The attenuation is decribed as a first-order process. The corresponding half-life is 104 h. This low half-life suggests that a generally assumed low natural attenuation capacity of karst aquifers is unjustified. The observed mass loss of caffeine illustrates the potential of caffeine to be used as reactive tracer for indicating in-situ attenuation capacity within highly hydraulically conductive systems, such as karst aquifers. Due to the high attenuation rate of caffeine it does not pose a threat as a longtime contaminant. In combination with a conservative reference tracer an economical and environmentally benign method is presented in this manuscript for the in-situ determination of the attenuation capacity of highly conductive aquifer systems. (C) 2012 Elsevier Ltd. All rights reserved."],["dc.description.sponsorship","German Federal Ministry of Education and Research [02WRS1277A]"],["dc.identifier.doi","10.1016/j.watres.2012.07.032"],["dc.identifier.isi","000309095800046"],["dc.identifier.pmid","22877878"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/25147"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0043-1354"],["dc.title","Identification of the attenuation potential of a karst aquifer by an artificial dualtracer experiment with caffeine"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1272"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Chemosphere"],["dc.bibliographiccitation.lastpage","1277"],["dc.bibliographiccitation.volume","89"],["dc.contributor.author","Barbieri, Manuela"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Carrera, Jesus"],["dc.contributor.author","Ayora, Carlos"],["dc.contributor.author","Sanchez-Vila, Xavier"],["dc.date.accessioned","2018-11-07T09:04:07Z"],["dc.date.available","2018-11-07T09:04:07Z"],["dc.date.issued","2012"],["dc.description.abstract","The fate of the three environmentally relevant beta-blockers atenolol, metoprolol and propranolol has been studied in batch experiments involving aquifer material and nitrate reducing conditions. Results from the about 90d long tests indicate that abiotic processes, most likely sorption, jointly with biotransformation to atenololic acid were responsible for the 65% overall removal observed for atenolol. Zero order kinetics, typical of enzyme-limited reactions, controlled the transformation of this beta blocker to its corresponding carboxylic acid. The mass balance evidences that no mineralization of atenolol occurs in the biotic experiment and that atenololic acid is more stable than its parent compound under the studied conditions. This finding stresses the importance of considering atenololic acid as target compound in the environmental studies on the fate of atenolol. For metoprolol and propranolol the results from the experiment suggest a slower sorption to be the dominant removal process, which led to final decreases in concentrations of 25-30% and 40-45%, respectively. Overall, the removals observed in the experiments suggest that subsurface processes potentially constitute an alternative water treatment for the target beta-blockers, when compared to the removals reported for conventional wastewater treatment plants. (C) 2012 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.chemosphere.2012.05.019"],["dc.identifier.isi","000310112600002"],["dc.identifier.pmid","22682361"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/25041"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0045-6535"],["dc.title","Fate of beta-blockers in aquifer material under nitrate reducing conditions: Batch experiments"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4631"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Environmental Science and Pollution Research"],["dc.bibliographiccitation.lastpage","4643"],["dc.bibliographiccitation.volume","22"],["dc.contributor.author","Reh, Roland"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Geyer, Tobias"],["dc.contributor.author","Sauter, Martin"],["dc.date.accessioned","2018-11-07T10:00:15Z"],["dc.date.available","2018-11-07T10:00:15Z"],["dc.date.issued","2015"],["dc.description.abstract","This study presents chances and challenges associated with the application of organic micro-pollutants (OMPs) as indicators in karst system characterization. The methodology and options of possible indications were evaluated based on the interpretation of the spatial distribution of 54 compounds in groundwater in combination with a complex geological setting consisting of multiple aquifer horizons and tectonic faults. A high variety of OMPs are released mainly in an urban area leading to concentrations of several nanograms per liter up to micrograms per liter, which are detectable using a high-performance liquid chromatography with subsequent tandem mass spectrometry (HPLC-MS/MS) method. Since characteristic patterns of spatial distribution were repeatedly observed during a 2-year observation period, important criteria of the aforementioned indicator application are fulfilled. Triazoles, compounds with recent high emission rates, could be successfully applied for the identification of flow directions and the delineation of catchment areas. Concentrations and the number of OMPs are believed to be dependent on properties of covering rock layers. Therefore, OMPs can also be used as a validation tool for vulnerability mapping. Compounds, such as triazines, persistent in the system for more than two decades, demonstrate the interaction between different parts of the aquifer system and the hydraulic characteristics of a tectonic fault zone. Such indicator potentials complement those of artificial tracer tests. Point sources of OMPs and their impact on groundwater could be identified qualitatively. In combination with the interpretation of the geological setting, the distribution of OMPs provides essential information for the development of a conceptual hydrogeological model."],["dc.identifier.doi","10.1007/s11356-014-3676-z"],["dc.identifier.isi","000350572500054"],["dc.identifier.pmid","25323407"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37761"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","Heidelberg"],["dc.relation.issn","1614-7499"],["dc.relation.issn","0944-1344"],["dc.title","Evaluation and application of organic micro-pollutants (OMPs) as indicators in karst system characterization"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","438"],["dc.bibliographiccitation.journal","The Science of The Total Environment"],["dc.bibliographiccitation.lastpage","445"],["dc.bibliographiccitation.volume","443"],["dc.contributor.author","Reh, Roland"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Geyer, Tobias"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Sauter, Martin"],["dc.date.accessioned","2018-11-07T09:29:09Z"],["dc.date.available","2018-11-07T09:29:09Z"],["dc.date.issued","2013"],["dc.description.abstract","Fifty-four different organic micro-pollutants (OMPs) including pharmaceuticals, pesticides, corrosion inhibitors and other typical wastewater compounds such as caffeine are repeatedly analyzed in approximately fifty groundwater observation points in a complex faulted and fractured carbonate aquifer system consisting of three spring catchment areas. With the applied HPLC-MS/MS method, achieving method quantification limits (MQL) of 12-28 ng L-1, forty-four of the OMPs are detected in groundwater. Regarding the vertical distribution in the aquifer system the highest variety of OMPs occurs in the shallow aquifer. Most frequently detected compounds are atrazine together with the metabolites of several triazines, desethylatrazine (DEA) and desisopropylatrazine (DIA), the corrosion inhibitors 1H-benzotriazole and tolytriazoles and as pharmaceutical residues the anti-epileptic drug carbamazepine as well as the analgesic drug phenazone. Median OMP concentrations are in the range of 20-40 ng L-1 with occasionally and locally higher concentrations of up to 6000 ng L-1. Defined combinations of OMPs occur repeatedly in the same observation wells and allow to distinguish different input functions. The comparison of detection frequency with the number of prescribed doses gives information about the specific persistence of pharmaceuticals. The analgesic phenazone exhibits a peculiar high detection frequency, although it is recently not prescribed in significant amounts. The detection of the estrogen antagonist tamoxifen (6-17 ng L-1) in a groundwater flow system is reported for the first time. (C) 2012 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.scitotenv.2012.11.005"],["dc.identifier.isi","000315559900046"],["dc.identifier.pmid","23208277"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30949"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0048-9697"],["dc.title","Occurrence and spatial distribution of organic micro-pollutants in a complex hydrogeological karst system during low flow and high flow periods, results of a two-year study"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","6650"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","Water Research"],["dc.bibliographiccitation.lastpage","6659"],["dc.bibliographiccitation.volume","47"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Hillebrand, Olav"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Strathmann, Martin"],["dc.contributor.author","Schiperski, Ferry"],["dc.contributor.author","Zirlewagen, Johannes"],["dc.contributor.author","Licha, Tobias"],["dc.date.accessioned","2018-11-07T09:17:54Z"],["dc.date.available","2018-11-07T09:17:54Z"],["dc.date.issued","2013"],["dc.description.abstract","The substantial transformation of the angiotensin II receptor antagonist valsartan to the transformation product 2'-(2H-tetrazol-5-yl)-[1,1'-biphenyl]-4-carboxylic acid (referred to as valsartan acid) during the activated sludge process was demonstrated in the literature and confirmed in the here presented study. However, there was a severe lack of knowledge regarding the occurrence and fate of this compound in surface water and its behavior during drinking water treatment. In this work a comparative study on the occurrence and persistency of valsartan acid, three frequently used beta-blockers (metoprolol, atenolol, and sotalol), atenolol acid (one significant transformation product of atenolol and metoprolol), and the two widely distributed persistent anthropogenic wastewater indicators carbamazepine and acesulfame in raw sewage, treated wastewater, surface water, groundwater, and tap water is presented. Median concentrations of valsartan acid in the analyzed matrices were 101, 1,310, 69, <1.0, and 65 ng L-1, respectively. Treated effluents from wastewater treatment plants were confirmed as significant source. Regarding concentration levels of pharmaceutical residues in surface waters valsartan acid was found just as relevant as the analyzed beta-blockers and the anticonvulsant carbamazepine. Regarding its persistency in surface waters it was comparable to carbamazepine and acesulfame. Furthermore, removal of valsartan acid during bank filtration was poor, which demonstrated the relevance of this compound for drinking water suppliers. Regarding drinking water treatment (Muelheim Process) the compound was resistant to ozonation but effectively eliminated (>= 90%) by subsequent activated carbon filtration. However, without applying activated carbon filtration the compound may enter the drinking water distribution system as it was demonstrated for Berlin tap water. (C) 2013 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.watres.2013.08.034"],["dc.identifier.isi","000327911700023"],["dc.identifier.pmid","24070867"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28285"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0043-1354"],["dc.title","Occurrence and fate of the angiotensin II receptor antagonist transformation product valsartan acid in the water cycle - A comparative study with selected beta-blockers and the persistent anthropogenic wastewater indicators carbamazepine and acesulfame"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","360"],["dc.bibliographiccitation.journal","The Science of The Total Environment"],["dc.bibliographiccitation.lastpage","367"],["dc.bibliographiccitation.volume","532"],["dc.contributor.author","Schiperski, Ferry"],["dc.contributor.author","Zirlewagen, Johannes"],["dc.contributor.author","Hillebrand, Olaf"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Scheytt, Traugott J."],["dc.date.accessioned","2018-11-07T09:49:58Z"],["dc.date.available","2018-11-07T09:49:58Z"],["dc.date.issued","2015"],["dc.description.abstract","Karst aquifers are known to be highly vulnerable to contamination due to their particular hydraulic characteristics. A number of parameters (such as turbidity, dissolved organic matter concentration, particle size distribution) have been proposed as proxies that can be used to detect changes in water quality or contamination of karst springs. However, most of these are not very specific concerning the source of any contamination. Organic micropollutants (OMPs) such as artificial sweeteners or herbicides are possible source-specific indicators that can be used in karst catchment areas, but real time monitoring is not as yet possible for these compounds. We have investigated the possibility of combining the source-specific features of OMPs with real-time measurements of electrical conductivity (EC) and turbidity by means of ECturbidity hysteresis plots. These plots allow for identifying different hydro-sedimentary processes. Our investigations were carried out at the Gallusquelle karst spring in south-west Germany, during high flow conditions that occurred in 2013 after heavy precipitation. The herbicide atrazine, which derives from the aquifer matrix, was detectable in the spring water until resuspended particles appeared at the spring. The herbicide metazachlor, which is present in recharge from cropland, was found to be associated with periods of direct transfer of particles originating from the land surface. The artificial sweetener cyclamate was used as a wastewater indicator, but neither hysteresis plots of EC and turbidity nor any other real-time parameters were able to detect the presence of cyclamate following a wastewater spill. Since EC and turbidity are easily measurable parameters, the systematic relationships of ECturbidity hysteresis behavior to OMPs might assist in the sustainable management of raw water within karst catchments. (C) 2015 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","Federal Ministry of Education and Research (BMBF) [02WRS1277A/B]"],["dc.identifier.doi","10.1016/j.scitotenv.2015.06.007"],["dc.identifier.isi","000360286500036"],["dc.identifier.pmid","26081739"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/35611"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1879-1026"],["dc.relation.issn","0048-9697"],["dc.title","Relationship between organic micropollutants and hydro-sedimentary processes at a karst spring in south-west Germany"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]