Results 61 to 70 of about 1,793,957 (199)

Polarographic Determination of Uranium by Extraction Separation

Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan, 1971
Uranyl tribenzoate, formed in benzoate-benzoic acid media, was extracted into chloroform in combination with quaternary ammonium salts (DMBPAC, TEBAC and TEPAC) at pH 2.5-5.5 in the ratio of 1:1. The plot of logD against pH indicated third power dependence of pH. Similar plots of logD vs. log[B-] also showed a slope of 3.
SHINAGAWA, Mutsuaki, KATSURA, Kosho
openaire   +2 more sources

Overcoming Chemical Dissociation Processes: Electrochemical Modulation of High‐Affinity Binding Sites for Rapid Uranium Extraction from Seawater

Advanced Functional Materials
Currently reported adsorption (hydroxyl or amidoxime) groups must dissociate hydrogen ions to form ─O− units for the coordination with uranyl ions. However, this process suffers a high energy barrier for bond dissociation, leading to the sluggish uptake ...
Cheng Zhang, Zeyu Wang, Rongchen Ma, Jiarui Cao, Xianghui Ruan, Doudou Cao, Yingbo Song, Shusen Chen, Yan Song, Fengju Wang, Ye Yuan, Yajie Yang, Guangshan Zhu   +12 more
semanticscholar   +1 more source

The solvent extraction and stripping process using Alamine 336 with a case study of uranium

Scientific Reports
In this research, a comprehensive study of the solvent extraction of uranium (VI) from acidic sulfate solutions using Alamine 336 diluted in kerosene was scrutinized.
Fazel Zahakifar, Fereshte Khanramaki, Davood Ghoddocy Nejad, Valiyollah Ghazanfari, Ali Yadollahi   +4 more
doaj   +1 more source

Decontamination of Uranium-Contaminated Soil Sand Using Supercritical CO2 with a TBP–HNO3 Complex

Metals, 2015
An environmentally friendly decontamination process for uranium-contaminated soil sand is proposed. The process uses supercritical CO2 as the cleaning solvent and a TBP–HNO3 complex as the reagent.
Kwangheon Park, Wonyoung Jung, Jihye Park   +2 more
doaj   +1 more source

Extraction of uranium from phosphoric acid by solvent approaches using D2EHPA and TOPO: Experimental design with environmental implications [PDF]

E3S Web of Conferences
With the current nation's great demand for nuclear power, the importance to recover uranium from phosphoric acid has become relevant, Solvent extraction is one of the most effective uranium recovery methods.
Ajabli Asmae, El Ahmadi Zakia, Berkalou Kaoutar, Ghazi Mohamed   +3 more
doaj   +1 more source

A synergistic coordination-reduction interface for electrochemical reductive extraction of uranium with low impurities from seawater

Nature Communications
Electrochemical extraction of uranium from seawater is a promising strategy for the sustainable supply of nuclear fuel, whereas the current progress suffers from the co-deposition of impurities.
Hongliang Guo, Enmin Hu, Yihao Wang, Zhenhong Ou, Bichun Huang, Jia Lei, Huanhuan Liu, Rong He, Wenkun Zhu   +8 more
semanticscholar   +1 more source

Ion exchange investigation for recovery of uranium from acidic pregnant leach solutions

Nukleonika, 2017
The article describes studies on the separation of uranium from acid pregnant leach solutions obtained from Polish uranium ores: dictyonema shales and sandstone rocks.
Danko Bożena, Dybczyński Rajmund S., Samczyński Zbigniew, Gajda Dorota, Herdzik-Koniecko Irena, Zakrzewska-Kołtuniewicz Grażyna, Chajduk Ewelina, Kulisa Krzysztof   +7 more
doaj   +1 more source

Research of uranium content in the composition of phosphorites of the Aznek mines [PDF]

E3S Web of Conferences
Today, practical work is being carried out in the world on processing minerals to obtain valuable components. Leading scientists from all over the world are engaged in scientific research on the extraction and production of radioactive elements, such as ...
Khurramov Navruzbek, Nurmurodov Tulkin, Rakhimova Gulrukh, Nuriddinova Ziyoda, Sharafutdinov Ulugbek   +4 more
doaj   +1 more source

Sustainability of uranium extraction – a discussion

Nuclear power has been declared a green technology within the scope of the EU taxonomy. However, this decision did not take into account the mining of uranium and the final disposal of uranium products.  The different methods for mining uranium and their effects on the environment are discussed in this paper.
Engelbrecht, Hubert, Priester, Michael, Rechlin, Aissa   +2 more
openaire   +1 more source

Dictyonema black shale and Triassic sandstones as potential sources of uranium

Nukleonika, 2015
The main objective of the present study was an assessment of the possibility of uranium recovery from domestic resources in Poland. In the first stage uranium was leached from the ground uranium ore by using acidic (sulfuric acid or hydrochloric acid) or
Kiegiel Katarzyna, Zakrzewska-Kołtuniewicz Grażyna, Gajda Dorota, Miśkiewicz Agnieszka, Abramowska Anna, Biełuszka Paweł, Danko Bożena, Chajduk Ewelina, Wołkowicz Stanisław   +8 more
doaj   +1 more source