| Records |
| Author |
Uhrie, J.L.; Drever, J.I.; Colberg, P.J.S.; Nesbitt, C.C. |
| 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 |
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| Volume |
43 |
Issue |
1 |
Pages  |
231-239 |
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| 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 |
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no |
| Call Number |
THL @ christoph.kuells @ uhrie_situ_1996 |
Serial |
197 |
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| Author |
Rubin, R. |
| Title |
Water conservation methods in Israel’s Negev desert in late antiquity |
Type |
Journal Article |
| Year |
1988 |
Publication |
Journal of Historical Geography |
Abbreviated Journal |
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| Volume |
14 |
Issue |
3 |
Pages |
229-244 |
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| Abstract |
Settlement in Israel’s Negev desert historically has been dependent on water conservation techniques. Fieldwork carried out on settlement sites constructed during the Byzantine period, when agriculture and trade flourished, revealed a variety of water installations some of which are in use today. Perennial springs in the Negev are generally small and difficult of access. Cisterns were the most common conservation devices and came in both large, enclosed and single, open forms. Cisterns were common particularly in the towns, where they were usually built as part of house foundations. Dams were discovered at several sites but proved to be inefficient and easily abandoned because of evaporation and siltation problems. Public reservoirs were part of the structure of the largest towns and were open and among the larges structures uncovered at settlement sites. Wells were distributed widely throughout the desert and were part of the only conservation system that did not depend directly on surface rainfall. A qanat system was located in the eastern Negev dating from the late settlement period before the area was abandoned at the turn of the eighth century. These various water systems raise questions about their builders and their origins, and suggests that builders originating in more humid Mediterranean environments tended to produce less adaptable installations than builders derived from the south or the east. |
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| ISSN |
0305-7488 |
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no |
| Call Number |
THL @ christoph.kuells @ Rubin1988229 |
Serial |
262 |
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| Author |
Kharaka, Y.; Harmon, R.; Darling, G. |
| Title |
W. Mike Edmunds (1941–2015) |
Type |
Journal Article |
| Year |
2015 |
Publication |
Applied Geochemistry |
Abbreviated Journal |
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| Volume |
59 |
Issue |
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Pages |
225-226 |
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| ISSN |
0883-2927 |
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no |
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THL @ christoph.kuells @ kharaka_w_2015 |
Serial |
103 |
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| Author |
Hdeib, R.; Aouad, M. |
| Title |
Rainwater harvesting systems: An urban flood risk mitigation measure in arid areas |
Type |
Journal Article |
| Year |
2023 |
Publication |
Water Science and Engineering |
Abbreviated Journal |
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| Volume |
16 |
Issue |
3 |
Pages |
219-225 |
| Keywords |
Rainwater harvesting, Urban floods, Flood map, Hydrodynamic model, Built environment, Arid areas |
| Abstract |
Rainwater harvesting (RWH) systems have been developed to compensate for shortage in the water supply worldwide. Such systems are not very common in arid areas, particularly in the Gulf Region, due to the scarcity of rainfall and their reduced efficiency in covering water demand and reducing water consumption rates. In spite of this, RWH systems have the potential to reduce urban flood risks, particularly in densely populated areas. This study aimed to assess the potential use of RWH systems as urban flood mitigation measures in arid areas. Their utility in the retention of stormwater runoff and the reduction of water depth and extent were evaluated. The study was conducted in a residential area in Bahrain that experienced waterlogging after heavy rainfall events. The water demand patterns of housing units were analyzed, and the daily water balance for RWH tanks was evaluated. The effect of the implementation of RWH systems on the flood volume was evaluated with a two-dimensional hydrodynamic model. Flood simulations were conducted in several rainfall scenarios with different probabilities of occurrence. The results showed significant reductions in the flood depth and flood extent, but these effects were highly dependent on the rainfall intensity of the event. RWH systems are effective flood mitigation measures, particularly in urban arid regions short of proper stormwater control infrastructure, and they enhance the resilience of the built environment to urban floods. |
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1674-2370 |
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no |
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THL @ christoph.kuells @ Hdeib2023219 |
Serial |
242 |
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| Author |
Yabusaki, S.B.; Fang, Y.; Long, P.E.; Resch, C.T.; Peacock, A.D.; Komlos, J.; Jaffe, P.R.; Morrison, S.J.; Dayvault, R.D.; White, D.C.; Anderson, R.T. |
| Title |
Uranium removal from groundwater via in situ biostimulation: Field-scale modeling of transport and biological processes |
Type |
Journal Article |
| Year |
2007 |
Publication |
Journal of Contaminant Hydrology |
Abbreviated Journal |
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| Volume |
93 |
Issue |
1 |
Pages |
216-235 |
| Keywords |
Bioremediation, Biostimulation, Field experiment, Iron, Reactive transport, Sulfate, Uranium |
| Abstract |
During 2002 and 2003, bioremediation experiments in the unconfined aquifer of the Old Rifle UMTRA field site in western Colorado provided evidence for the immobilization of hexavalent uranium in groundwater by iron-reducing Geobacter sp. stimulated by acetate amendment. As the bioavailable Fe(III) terminal electron acceptor was depleted in the zone just downgradient of the acetate injection gallery, sulfate-reducing organisms came to dominate the microbial community. In the present study, we use multicomponent reactive transport modeling to analyze data from the 2002 field experiment to identify the dominant transport and biological processes controlling uranium mobility during biostimulation, and determine field-scale parameters for these modeled processes. The coupled process simulation approach was able to establish a quantitative characterization of the principal flow, transport, and reaction processes based on the 2002 field experiment, that could be applied without modification to describe the 2003 field experiment. Insights gained from this analysis include field-scale estimates of the bioavailable Fe(III) mineral threshold for the onset of sulfate reduction, and rates for the Fe(III), U(VI), and sulfate terminal electron accepting processes. |
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| ISSN |
0169-7722 |
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no |
| Call Number |
THL @ christoph.kuells @ yabusaki_uranium_2007 |
Serial |
156 |
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