| |
Records |
Links |
|
Author |
Adar, E.M.; Külls, C. |
|
| |
Title |
MCM sf–Mixing-cell model for a steady flow MIG–Mixing-cell input generator: A short manual for installation and operation of MCM sf using the MIG–mixing-cell input generator |
Type |
Report |
| |
Year |
2002 |
Publication |
|
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
|
Pages |
|
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference  |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
THL @ christoph.kuells @ adar2002mcm |
Serial |
67 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Paradis, C.J.; Hoss, K.N.; Meurer, C.E.; Hatami, J.L.; Dangelmayr, M.A.; Tigar, A.D.; Johnson, R.H. |
|
| |
Title |
Elucidating mobilization mechanisms of uranium during recharge of river water to contaminated groundwater |
Type |
Journal Article |
| |
Year |
2022 |
Publication |
Journal of Contaminant Hydrology |
Abbreviated Journal |
|
|
| |
Volume |
251 |
Issue |
|
Pages |
104076 |
|
| |
Keywords |
Desorption, Dissolution, Groundwater, Surface water, Tracer, Uranium |
|
| |
Abstract |
The recharge of stream water below the baseflow water table can mobilize groundwater contaminants, particularly redox-sensitive and sorptive metals such as uranium. However, in-situ tracer experiments that simulate the recharge of stream water to uranium-contaminated groundwater are lacking, thus limiting the understanding of the potential mechanisms that control the mobility of uranium at the field scale. In this study, a field tracer test was conducted by injecting 100 gal (379 l) of oxic river water into a nearby suboxic and uranium-contaminated aquifer. The traced river water was monitored for 18 days in the single injection well and in the twelve surrounding observation wells. Mobilization of uranium from the solid to the aqueous phase was not observed during the tracer test despite its pre-test presence being confirmed on the aquifer sediments from lab-based acid leaching. However, strong evidence of oxidative immobilization of iron and manganese was observed during the tracer test and suggested that immobile uranium was likely in its oxidized state as U(VI) on the aquifer sediments; these observations ruled out oxidation of U(IV) to U(VI) as a potential mobilization mechanism. Therefore, desorption of U(VI) appeared to be the predominant potential mobilization mechanism, yet it was clearly not solely dependent on concentration as evident when considering that uranium-poor river water (\textless0.015 mg/L) was recharged to uranium-rich groundwater (≈1 mg/L). It was possible that uranium desorption was limited by the relatively higher pH and lower alkalinity of the river water as compared to the groundwater; both factors favor immobilization. However, it was likely that the immobile uranium was associated with a mineral phase, as opposed to a sorbed phase, thus desorption may not have been possible. The results of this field tracer study successfully ruled out two common mobilization mechanisms of uranium: (1) oxidative dissolution and (2) concentration-dependent desorption and ruled in the importance of advection, dispersion, and the mineral phase of uranium. |
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
0169-7722 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
THL @ christoph.kuells @ paradis_elucidating_2022 |
Serial |
135 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
N, D.; Panda, B.; S, C.; V, P.M.; Singh, D.K.; L, R.A.; Sahoo, S.K. |
|
| |
Title |
Spatio-temporal variations of Uranium in groundwater: Implication to the environment and human health |
Type |
Journal Article |
| |
Year |
2021 |
Publication |
Science of The Total Environment |
Abbreviated Journal |
|
|
| |
Volume |
775 |
Issue |
|
Pages |
145787 |
|
| |
Keywords |
Groundwater, Health risk, Speciation, Stable isotopes, Statistics, Uranium |
|
| |
Abstract |
Groundwater overexploitation has resulted in huge scarcity and increase in the demand for water and food security in India. Groundwater in India has been observed to have experienced various water quality issues like arsenic, fluoride, and Uranium (U) contamination, leading to risk in human health. Markedly, the health risk of higher U in drinking water, as well as its chemical toxicity in groundwater have adverse effects on human. This study has reported occurrence of U as an emerging and widespread phenomenon in South Indian groundwater. Data on U in groundwater were generated from 284 samples along the Cretaceous Tertiary boundary within 4 seasons viz. pre-monsoon (PRM), southwest monsoon (SWM), northeast monsoon (NEM), and post-monsoon (POM). High U concentrations (74 μgL−1) showed to be above the World Health Organization’s provisional guideline value of 30 μgL−1. The geochemical, stable isotope and geophysical studies suggested that U in groundwater could vary with respect to season and was noted to be highest during NEM. The bicarbonate (HCO3) released by weathering process during monsoon could affect the saturation index (SI)Calcite and carbonate species of U. However, the primary source of U was found to be due to geogenic factors, like weathering, dissolution, and groundwater level fluctuation, and that, U mobilization could be enhanced due to anthropogenic activities. The findings further indicated that groundwater in the study area has reached the alarming stage of chemical toxicity. Hence, it is urgent and imperative that workable management strategies for sustainable drinking water source be developed and preventive measures be undertaken, relative to these water quality concerns to mitigate their disconcerting effect on human health. |
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
0048-9697 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
THL @ christoph.kuells @ n_spatio-temporal_2021 |
Serial |
146 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Doulgeris, C.; Tziritis, E.; Pisinaras, V.; Panagopoulos, A.; Külls, C. |
|
| |
Title |
Prediction of seawater intrusion to coastal aquifers based on non-dimensional diagrams |
Type |
Conference Article |
| |
Year |
2020 |
Publication |
EGU Geophysical Abstracts |
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
|
Pages |
4073 |
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
THL @ christoph.kuells @ Doulgeris2020prediction |
Serial |
41 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Leibundgut, C.; Maloszewski, P.; Külls, C. |
|
| |
Title |
Tracers in Hydrology |
Type |
Book Whole |
| |
Year |
2009 |
Publication |
|
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
1. Ed. |
Pages |
|
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
John Wiley & Sons, Ltd |
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
THL @ christoph.kuells @ Leibundgut2009tracers |
Serial |
37 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Külls, C. |
|
| |
Title |
Groundwater of the North-Western Kalahari, Namibia: estimation of recharge and quantification of the flow system |
Type |
Book Whole |
| |
Year |
2001 |
Publication |
Hydrogeologie und Umwelt |
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
|
Pages |
|
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
Doctoral thesis |
|
| |
Publisher |
Hydrogeologie und Umwelt |
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
THL @ christoph.kuells @ Kuells2003groundwater |
Serial |
38 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Döll, P.; Krol, M.; Fuhr, D.; Gaiser, T.; Herfort, J.; Höynck, S.; Jaeger, A.; Külls, C.; Mendiondo, E.M.; Printz, A.; others |
|
| |
Title |
Integrated scenarios of regional development in Ceará and Piauí |
Type |
Book Chapter |
| |
Year |
2003 |
Publication |
Global Change and Regional Impacts |
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
|
Pages |
19-41 |
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
Springer, Berlin, Heidelberg |
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
THL @ christoph.kuells @ Doll2003integrated |
Serial |
39 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Voerkelius, S.; Külls, C.; Santiago, M.M.F.; Frischkorn, H.; dos Santos Semrau, L.A.; Heinrichs, G.; Gil, M.M.L. |
|
| |
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 |
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
Springer, Berlin, Heidelberg |
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
THL @ christoph.kuells @ Voerkelius2003investigations |
Serial |
40 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Külls, C.; Leibundgut, C.; Schwarz, U.; Schick, A.P. |
|
| |
Title |
Channel infiltration study using dye tracers |
Type |
Journal Article |
| |
Year |
1995 |
Publication |
IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences |
Abbreviated Journal |
|
|
| |
Volume |
232 |
Issue |
|
Pages |
429-436 |
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
Wallingford [Oxfordshire]: IAHS, 1981- |
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
THL @ christoph.kuells @ Kuells1995channel |
Serial |
36 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Demuth, S.; Külls, C. |
|
| |
Title |
Probability analysis and regional aspects of droughts in southern Germany |
Type |
Journal Article |
| |
Year |
1997 |
Publication |
Sustainability of Water Resources under Increasing Uncertainty |
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
240 |
Pages |
97 |
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
Iahs |
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
THL @ christoph.kuells @ Demuth1997probability |
Serial |
35 |
|
| Permanent link to this record |
