Licha, Tobias

[["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Water Resources Research"],["dc.bibliographiccitation.volume","54"],["dc.contributor.author","Tatomir, A."],["dc.contributor.author","De Vriendt, K."],["dc.contributor.author","Zhou, D."],["dc.contributor.author","Gao, H."],["dc.contributor.author","Duschl, F."],["dc.contributor.author","Sun, F."],["dc.contributor.author","Licha, T."],["dc.contributor.author","Sauter, M."],["dc.date.accessioned","2020-12-10T18:09:24Z"],["dc.date.available","2020-12-10T18:09:24Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1029/2018WR022621"],["dc.identifier.eissn","1944-7973"],["dc.identifier.issn","0043-1397"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73640"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Kinetic Interface Sensitive Tracers: Experimental Validation in a Two‐Phase Flow Column Experiment. A Proof of Concept"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["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","75"],["dc.bibliographiccitation.journal","Science of The Total Environment"],["dc.bibliographiccitation.lastpage","89"],["dc.bibliographiccitation.volume","686"],["dc.contributor.author","Warner, Wiebke"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Nödler, Karsten"],["dc.date.accessioned","2020-12-10T15:21:14Z"],["dc.date.available","2020-12-10T15:21:14Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1016/j.scitotenv.2019.05.385"],["dc.identifier.issn","0048-9697"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72957"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Qualitative and quantitative use of micropollutants as source and process indicators. A review"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","37"],["dc.bibliographiccitation.journal","Geothermics"],["dc.bibliographiccitation.lastpage","44"],["dc.bibliographiccitation.volume","43"],["dc.contributor.author","Nottebohm, Martin"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Sauter, Martin"],["dc.date.accessioned","2018-11-07T09:08:39Z"],["dc.date.available","2018-11-07T09:08:39Z"],["dc.date.issued","2012"],["dc.description.abstract","This paper describes the first steps in the design of new custom-made tracers for the investigation of thermal characteristics in deep geothermal reservoirs. Based on ester hydrolysis, the influences of different substituents on the reaction kinetics are studied in detail using the analog phenol acetates under the influence of varying pH and temperatures. Furthermore, a 2-ethylbutyl-2-naphthol-6-sulfonic ester is tested in laboratory experiments for its applicability as a practical thermo-sensitive tracer, considering also the influences of brine and rock matrix. The reaction is shown to be strongly thermo-sensitive while the reaction kinetics can be varied by two orders of magnitude by altering the sterical hindrance groups. These changes in the reaction kinetics are found to be predictable by using the results of this work. It has been found that the half-life can be decreased by the factor of three, if the reacting group is sterically hindered from one side and by the factor of ten, if the reacting group is hindered from both sides. Also mesomeric and inductive effects of substituents on the aromatic ring have significant effects on reaction rates. The pH-dependency on the reaction speed could be quantified and it is shown that the reaction complete alkaline catalyzed. Therefore, this reaction fulfills the many considerations of a tracer-test, such as varying absolute temperature, test durations, and temperature gradients. (C) 2012 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.geothermics.2012.02.002"],["dc.identifier.isi","000306050800004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26081"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0375-6505"],["dc.title","Tracer design for tracking thermal fronts in geothermal reservoirs"],["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","57"],["dc.bibliographiccitation.journal","Electrochimica Acta"],["dc.bibliographiccitation.lastpage","65"],["dc.bibliographiccitation.volume","122"],["dc.contributor.author","Machata, Peter"],["dc.contributor.author","Rapta, Peter"],["dc.contributor.author","Lukes, Vladimir"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Beckert, Rainer"],["dc.contributor.author","Dunsch, Lothar"],["dc.date.accessioned","2018-11-07T09:42:37Z"],["dc.date.available","2018-11-07T09:42:37Z"],["dc.date.issued","2014"],["dc.description.abstract","A detailed spectroelectrochemical and theoretical study of thienyl derivatives based on pyrene, namely 1-(2-thienyl)-pyrene (1), 1,6-bis(2-thienyl)-pyrene (2), 1,4-bis(2-thienyl)-pyrene (3), 1,3,6-tris(2-thienyl)-pyrene (4) and 1,3,6,8-tetra(2-thienyl)-pyrene (5), and their oxidation products with focus on the formation of their corresponding cationic states are presented. Regioregular polymeric systems were prepared by means of electrochemical polymerization from monomers 2-4. The redox behavior of the corresponding polymers was studied by cyclic voltammetry and in situ EPR/UV-vis-NIR spectroelectrochemistry with the aim of obtaining details on the type of charge carriers within the polymer film. Quantum chemical calculations of the optimal geometries and optical transitions for the neutral and charged forms were performed in order to reveal the influence of electrochemical oxidation on the molecular structure of the monomers and corresponding dimers and/or polymers. (C) 2013 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.electacta.2013.08.045"],["dc.identifier.isi","000334007900009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33999"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1873-3859"],["dc.relation.issn","0013-4686"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.title","Regioregular electrochromic polymers based on thienyl derivatives of fluorescent pyrene monomers: Optical properties, spectroelectrochemistry and quantum chemical study"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","481"],["dc.bibliographiccitation.journal","Chemical Engineering Journal"],["dc.bibliographiccitation.lastpage","491"],["dc.bibliographiccitation.volume","259"],["dc.contributor.author","Phukan, Meghalim"],["dc.contributor.author","Noubactep, Chicgoua"],["dc.contributor.author","Licha, Tobias"],["dc.date.accessioned","2018-11-07T10:04:19Z"],["dc.date.available","2018-11-07T10:04:19Z"],["dc.date.issued","2015"],["dc.description.abstract","The effect of the ionic charge on the efficiency of Fe-0/sand systems for dye discoloration was investigated in column studies. Tested systems for each dye were: (i) pure sand (0% Fe-0), (ii) pure Fe-0 (100% Fe-0), and (iii) Fe-0/sand (50% Fe-0 - vol/vol). Tested dyes were methylene blue (MB - cationic), Orange II (anionic) and reactive red 120 (RR 120 - anionic). Used dye concentration was 31 mu M and used Fe-0 mass was 100g. Each system was characterized by the time-dependent changes of the pH value, the iron breakthrough, the dye breakthrough, and the hydraulic conductivity (permeability). The experiments lasted for 93 days during which a total of 26.12 L of the dye solution flowed through each column (809.7 mu M dye in total). No significance changes in pH value, Fe breakthrough and permeability could be documented. In pure sand systems (0% Fe-0) 15, 21 and 140 mu M of RR 120, Orange II and MB were discolored respectively. The discoloration efficiency in Fe-0-based systems was 75% for MB and more than 95% for RR120 and Orange II. Results confirmed quantitative adsorptive MB discoloration and negligible adsorption of anionic dyes onto negatively charged sand. Quantitative discoloration of anionic dyes (Orange II, RR 120) in Fe-0/sand systems was attributed to high affinities of both species to positively iron corrosion products. UV-vis spectra of effluent solutions revealed a quantitative chemical reaction of RR 120 in the Fe-0/H2O system. The yellow-colored reaction products were not active in the range 800-200 nm and their breakthroughs were quantitative over the whole experimental duration. Results confirmed the ion-selective nature of the Fe-0/H2O system and are regarded as a cornerstone for the design of next generation Fe-0-based filtration systems. (C) 2014 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","German Ministry for Environment (BMU) [0325417]"],["dc.identifier.doi","10.1016/j.cej.2014.08.013"],["dc.identifier.isi","000343952400051"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38670"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1873-3212"],["dc.relation.issn","1385-8947"],["dc.title","Characterizing the ion-selective nature of Fe-0-based filters using azo dyes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["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"]]