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Author (up) Uddin, M.G.; Diganta, M.T.M.; Sajib, A.M.; Hasan, M.A.; Moniruzzaman, M.; Rahman, A.; Olbert, A.I. url  openurl
  Title Assessment of hydrogeochemistry in groundwater using water quality index model and indices approaches Type Journal Article
  Year 2023 Publication Heliyon Abbreviated Journal  
  Volume 9 Issue 9 Pages 19668  
  Keywords CCME index, Groundwater quality, Hydrogeochemistry, Irrigation indices, Nuclear power plant, Water quality index  
  Abstract Groundwater resources around the world required periodic monitoring in order to ensure the safe and sustainable utilization for humans by keeping the good status of water quality. However, this could be a daunting task for developing countries due to the insufficient data in spatiotemporal resolution. Therefore, this research work aimed to assess groundwater quality in terms of drinking and irrigation purposes at the adjacent part of the Rooppur Nuclear Power Plant (RNPP) in Bangladesh. For the purposes of achieving the aim of this study, nine groundwater samples were collected seasonally (dry and wet season) and seventeen hydro-geochemical indicators were analyzed, including Temperature (Temp.), pH, electrical conductivity (EC), total dissolved solids (TDS), total alkalinity (TA), total hardness (TH), total organic carbon (TOC), bicarbonate (HCO3−), chloride (Cl−), phosphate (PO43−), sulfate (SO42−), nitrite (NO2−), nitrate (NO3−), sodium (Na+), potassium (K+), calcium (Ca2+) and magnesium (Mg2+). The present study utilized the Canadian Council of Ministers of the Environment water quality index (CCME-WQI) model to assess water quality for drinking purposes. In addition, nine indices including EC, TDS, TH, sodium adsorption ratio (SAR), percent sodium (Na%), permeability index (PI), Kelley’s ratio (KR), magnesium hazard ratio (MHR), soluble sodium percentage (SSP), and Residual sodium carbonate (RSC) were used in this research for assessing the water quality for irrigation purposes. The computed mean CCME-WQI score found higher during the dry season (ranges 48 to 74) than the wet season (ranges 40 to 65). Moreover, CCME-WQI model ranked groundwater quality between the “poor” and “marginal” categories during the wet season implying unsuitable water for human consumption. Like CCME-WQI model, majority of the irrigation index also demonstrated suitable water for crop cultivation during dry season. The findings of this research indicate that it requires additional care to improve the monitoring programme for protecting groundwater quality in the RNPP area. Insightful information from this study might be useful as baseline for national strategic planners in order to protect groundwater resources during the any emergencies associated with RNPP.  
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  ISSN 2405-8440 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number THL @ christoph.kuells @ uddin_assessment_2023 Serial 167  
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Author (up) Udluft, P.; Dünkeloh, A.; Mederer, J.; Külls, C.; Schaller, J. openurl 
  Title Re-evaluation of the groundwater resources of Cyprus Type Report
  Year 2006 Publication Abbreviated Journal  
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  Corporate Author Thesis  
  Publisher Lefkosia Place of Publication Editor  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number THL @ christoph.kuells @ Udluft2006re Serial 66  
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Author (up) Udluft, P.; Külls, C. openurl 
  Title Mapping the availability and dynamics of groundwater recharge. Part 1: modelling techniques Type Conference Article
  Year 2000 Publication Proceedings of the Third Congress on Regional Geological Cartography and Information Systems Abbreviated Journal  
  Volume Issue Pages 337-340  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ Udluft2000mapping Serial 64  
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Author (up) Uhrie, J.L.; Drever, J.I.; Colberg, P.J.S.; Nesbitt, C.C. url  openurl
  Title In situ immobilization of heavy metals associated with uranium leach mines by bacterial sulfate reduction Type Journal Article
  Year 1996 Publication Hydrometallurgy Abbreviated Journal  
  Volume 43 Issue 1 Pages 231-239  
  Keywords  
  Abstract Laboratory experiments with mixed populations of sulfate-reducing bactreria were shown to mediate the removal of milligrams/liter concentrations of uranium, selenium, arsenic and vanadium from aqueous solution via reduction, precipitation and adsorption. Results of laboratory experiments with active sulfidogenic biomass suggest that injection of sulfate and a source of carbon could enhance anaerobic microbial activity in and around uranium leach mines leading to in situ immobilization contaminating metals.  
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  ISSN 0304-386x ISBN Medium  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ uhrie_situ_1996 Serial 197  
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Author (up) United Nations openurl 
  Title Stampriet Transboundary Aquifer System Assessment: governance of Groundwater resources in Transboundary Aquifers (GGRETA), phase 1: technical report Type Miscellaneous
  Year 1998 Publication Abbreviated Journal  
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  Notes Incl. bibl. Approved no  
  Call Number THL @ christoph.kuells @ Serial 286  
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Author (up) Uugulu, S.; Wanke, H. url  openurl
  Title Estimation of groundwater recharge in savannah aquifers along a precipitation gradient using chloride mass balance method and environmental isotopes, Namibia Type Journal Article
  Year 2020 Publication Physics and Chemistry of the Earth, Parts A/B/C Abbreviated Journal  
  Volume 116 Issue Pages 102844  
  Keywords Chloride mass balance, Groundwater recharge, Isotopic values, Precipitation gradient  
  Abstract The quantification of groundwater resources is essential especially in water scarce countries like Namibia. The chloride mass balance (CMB) method and isotopic composition were used in determining groundwater recharge along a precipitation gradient at three sites, namely: Tsumeb (600 mm/a precipitation); Waterberg (450 mm/a precipitation) and Kuzikus/Ebenhaezer (240 mm/a precipitation). Groundwater and rainwater were collected from year 2016–2017. Rainwater was collected monthly while groundwater was collected before, during and after rainy seasons. Rainwater isotopic values for δ18O and δ2H range from −10.70 to 6.10‰ and from −72.7 to 42.1‰ respectively. Groundwater isotopic values for δ18O range from −9.84 to −5.35‰ for Tsumeb; from −10.85 to −8.60‰ for Waterberg and from −8.24 to −1.56‰ for Kuzikus/Ebenhaezer, while that for δ2H range from −65.6 to −46.7‰ for Tsumeb; −69.4 to −61.2‰ for Waterberg and −54.2 to −22.7‰ for Kuzikus/Ebenhaezer. Rainwater scatters along the GMWL. Rainwater collected in January, February and March are more depleted in heavy isotopes than those in November, December, April and May. Waterberg groundwater plots on the GMWL which indicates absence of evaporation. Tsumeb groundwater plots on/close to the GMWL with an exception of groundwater from the karst Lake Otjikoto which is showing evaporation. Groundwater from Kuzikus/Ebenhaezer shows an evaporation effect, probably evaporation occurs during infiltration since it is observed in all sampling seasons. All groundwater from three sites plot in the same area with rainwater depleted in stable isotopic values, which could indicates that recharge only take place during January, February and March. CMB method revealed that Waterberg has the highest recharge rate ranging between 39.1 mm/a and 51.1 mm/a (8.7% – 11.4% of annual precipitation), Tsumeb with rates ranging from 21.1 mm/a to 48.5 mm/a (3.5% – 8.1% of annual precipitation), and lastly Kuzikus/Ebenhaezer from 3.2 mm/a to 17.5 mm/a (1.4% – 7.3% of annual precipitation). High recharge rates in Waterberg could be related to fast infiltration and absence of evaporation as indicated by the isotopic ratios. Differences in recharge rates cannot only be attributed to the precipitation gradient but also to the evaporation rates and the presence of preferential flow paths. Recharge rates estimated for these three sites can be used in managing the savannah aquifers especially at Kuzikus/Ebenhaezer where evaporation effect is observed that one can consider rain harvesting.  
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  ISSN 1474-7065 ISBN Medium  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ uugulu_estimation_2020 Serial 99  
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Author (up) Veerasamy, N.; Kasar, S.; Murugan, R.; Inoue, K.; Natarajan, T.; Ramola, R.C.; Fukushi, M.; Sahoo, S.K. url  openurl
  Title 234U/238U disequilibrium and 235U/238U ratios measured using MC-ICP-MS in natural high background radiation area soils to understand the fate of uranium Type Journal Article
  Year 2023 Publication Chemosphere Abbreviated Journal  
  Volume 323 Issue Pages 138217  
  Keywords HBRA, MC-ICP-MS, Monazites, U/U, Uranium  
  Abstract The Chhatrapur-Gopalpur coastal area in Odisha, India is a well-known natural high background radiation (HBRA) area due to the abundance of monazite (a thorium bearing radioactive mineral) in beach sands and soils. Recent studies on Chhatrapur-Gopalpur HBRA groundwater have reported high concentrations of uranium and its decay products. Therefore, the soils of the Chhatrapur-Gopalpur HBRA are reasonably suspected as the sources of these high uranium concentrations in groundwater. In this report, first the uranium concentrations in soil samples were measured using inductively coupled plasma mass spectrometry (ICP-MS) and they were found to range from 0.61 ± 0.01 to 38.59 ± 0.16 mg kg−1. Next, the 234U/238U and 235U/238U isotope ratios were measured to establish a baseline for the first time in Chhatrapur-Gopalpur HBRA soil. Multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) was used for measurement of these isotope ratios. The 235U/238U ratio was observed to be the normal terrestrial value. The 234U/238U activity ratio, was calculated to understand the secular equilibrium between 234U and 238U in soil and it varied from 0.959 to 1.070. To understand the dynamics of uranium in HBRA soil, physico-chemical characteristics of soil were correlated with uranium isotope ratios and this correlation of 234U/238U activity ratio indicated the leaching of 234U from Odisha HBRA soil.  
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  ISSN 0045-6535 ISBN Medium  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ veerasamy_234u238u_2023 Serial 149  
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Author (up) Voerkelius, S.; Külls, C.; Santiago, M.M.F.; Frischkorn, H.; dos Santos Semrau, L.A.; Heinrichs, G.; Gil, M.M.L. url  openurl
  Title Investigations on water management and water quality in Picos/PI and Tauá/CE Type Book Chapter
  Year 2003 Publication Global change and regional impacts Abbreviated Journal  
  Volume Issue Pages 173-184  
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  Publisher Springer, Berlin, Heidelberg Place of Publication Editor  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ Voerkelius2003investigations Serial 40  
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Author (up) Vogel, J.C.; Talma, A.S.; Heaton, T.H.E. url  openurl
  Title Gaseous nitrogen as evidence for denitrification in groundwater Type Journal Article
  Year 1981 Publication Journal of Hydrology Abbreviated Journal  
  Volume 50 Issue Pages 191-200  
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  Abstract By investigating the nitrate, oxygen, nitrogen and argon concentrations and 15N14N ratios in artesian groundwater with radiocarbon ages ranging up to 27,000 yr. a process of very slow denitrification in a confined aquifer is demonstrated. The calculated nitrogenisotope fractionation factor associated with this reaction is comparable to that reported for bacterial cultures in vitro and in vivo.  
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  ISSN 0022-1694 ISBN Medium  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ Vogel1981191 Serial 280  
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Author (up) Vogel, J.C.; Talma, A.S.; Heaton, T.H.E.; Kronfeld, J. url  openurl
  Title Evaluating the rate of migration of an uranium deposition front within the Uitenhage Aquifer Type Journal Article
  Year 1999 Publication Journal of Geochemical Exploration Abbreviated Journal  
  Volume 66 Issue 1 Pages 269-276  
  Keywords redox changes in aquifer, sandstone-type uranium deposit, South Africa, uranium series  
  Abstract The solubility of uranium in groundwater is very sensitive to changes in redox conditions. Many secondary (sandstone-type) uranium deposits have been formed when soluble U has precipitated after encountering reducing conditions in the subsurface. In the groundwater of the Uitenhage Aquifer (Cape Province, South Africa), 238U-series isotopes were used to assist in studying the history of the reducing barrier. Uranium isotopes were used to determine the present position of the barrier. Radium and radon were used to evaluate the path of migration that the front of the oxygen depletion zone has taken over the past 105 years. During this time the reducing barrier has moved, leaving in its wake a trail of U in various stages of secular equilibrium with its daughter 230Th. The 226Ra daughter of 230Th is not very mobile. Its growth upon the aquifer wall is reflected in the Rn content of the water. This in turn, due to the relatively great age of the water, indicates the extent of the 230Th ingrowth (from precipitated U) that took place before the barrier migrated.  
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  ISSN 0375-6742 ISBN Medium  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ vogel_evaluating_1999 Serial 126  
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