|   | 
Details
   web
Records
Author Külls, C.; Jobin, J.; Weiler, M.
Title Environmental analytics for water carbon management: enable WCM: Schlussbericht Type Report
Year 2015 Publication Abbreviated Journal
Volume Issue Pages
Keywords
Abstract
Address
Corporate Author Thesis
Publisher Albert Ludwigs Universität, Professur für Hydrologie 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 (up) Approved no
Call Number THL @ christoph.kuells @ Kuells2015environmental Serial 65
Permanent link to this record
 

 
Author Kharaka, Y.; Harmon, R.; Darling, G.
Title W. Mike Edmunds (1941–2015) Type Journal Article
Year 2015 Publication Applied Geochemistry Abbreviated Journal
Volume 59 Issue Pages 225-226
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 0883-2927 ISBN Medium
Area Expedition Conference
Notes (up) Approved no
Call Number THL @ christoph.kuells @ kharaka_w_2015 Serial 103
Permanent link to this record
 

 
Author Silva, M.L. da; Bonotto, D.M.
Title Uranium isotopes in groundwater occurring at Amazonas State, Brazil Type Journal Article
Year 2015 Publication Applied Radiation and Isotopes Abbreviated Journal
Volume 97 Issue Pages 24-33
Keywords Amazon area, Dissolved uranium, Groundwater, Tube wells, U/U activity ratio
Abstract This paper reports the behavior of the dissolved U-isotopes 238U and 234U in groundwater providing from 15 cities in Amazonas State, Brazil. The isotope dilution technique accompanied by alpha spectrometry were utilized for acquiring the U content and 234U/238U activity ratio (AR) data, 0.01–1.4µgL−1 and 1.0–3.5, respectively. These results suggest that the water is circulating in a reducing environment and leaching strata containing minerals with low uranium concentration. A tendency to increasing ARs values following the groundwater flow direction is identified in Manaus city. The AR also increases according to the SW–NE directions: Uarini→Tefé; Manacapuru→Manaus; Presidente Figueiredo→São Sebastião do Uatumã; and Boa Vista do Ramos→Parintins. Such trends are possibly related to several factors, among them the increasing acid character of the waters. The waters analyzed are used for human consumption and the highest dissolved U content is much lower than the maximum established by the World Health Organization. Therefore, in view of this radiological parameter they can be used for drinking purposes.
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 0969-8043 ISBN Medium
Area Expedition Conference
Notes (up) Approved no
Call Number THL @ christoph.kuells @ silva_uranium_2015 Serial 140
Permanent link to this record
 

 
Author Liesch, T.; Hinrichsen, S.; Goldscheider, N.
Title Uranium in groundwater — Fertilizers versus geogenic sources Type Journal Article
Year 2015 Publication Science of The Total Environment Abbreviated Journal
Volume 536 Issue Pages 981-995
Keywords Drinking water, Fertilizer, Geogenic background, Groundwater, Uranium
Abstract Due to its radiological and toxicological properties even at low concentration levels, uranium is increasingly recognized as relevant contaminant in drinking water from aquifers. Uranium originates from different sources, including natural or geogenic, mining and industrial activities, and fertilizers in agriculture. The goal of this study was to obtain insights into the origin of uranium in groundwater while differentiating between geogenic sources and fertilizers. A literature review concerning the sources and geochemical processes affecting the occurrence and distribution of uranium in the lithosphere, pedosphere and hydrosphere provided the background for the evaluation of data on uranium in groundwater at regional scale. The state of Baden-Württemberg, Germany, was selected for this study, because of its hydrogeological and land-use diversity, and for reasons of data availability. Uranium and other parameters from N=1935 groundwater monitoring sites were analyzed statistically and geospatially. Results show that (i) 1.6% of all water samples exceed the German legal limit for drinking water (10μg/L); (ii) The range and spatial distribution of uranium and occasional peak values seem to be related to geogenic sources; (iii) There is a clear relation between agricultural land-use and low-level uranium concentrations, indicating that fertilizers generate a measurable but low background of uranium in groundwater.
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 (up) Approved no
Call Number THL @ christoph.kuells @ liesch_uranium_2015 Serial 145
Permanent link to this record
 

 
Author Lach, P.; Cathelineau, M.; Brouand, M.; Fiet, N.
Title In-situ Isotopic and Chemical Study of Pyrite from Chu-Sarysu (Kazakhstan) Roll-front Uranium Deposit Type Journal Article
Year 2015 Publication Procedia Earth and Planetary Science Abbreviated Journal
Volume 13 Issue Pages 207-210
Keywords LA-ICP-MS, pyrite, roll-front, SIMS, sulfur isotopy, traces elements, uranium
Abstract Pyrite is common in roll-front type uranium deposit in Chu-sarysu basin, Kazakhstan. Combined in-situ microstructural, isotopic and chemical analysis of pyrite indicates variation in precipitation conditions and in fluid composition. Broad-scale δ34S heterogeneity indicates a complex multi-facet evolution. First generation authigenic framboïdal aggregates are biogenic as demonstrated by the lowest δ34S values of -48‰ to -28‰. The latest generation pyrites are probably hydrothermal with greater δ34S variation (-30‰ to +12‰). This hydrothermal pyrite commonly displays variable enrichment of several trace elements especially As, Co and Ni. Strong variation in δ34S values and variable trace element enrichment is interpreted in terms of continuous variations in fluid composition.
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 1878-5220 ISBN Medium
Area Expedition Conference
Notes (up) Approved no
Call Number THL @ christoph.kuells @ lach_-situ_2015 Serial 182
Permanent link to this record