Results 41 to 50 of about 86,385 (292)

Study on Calculation Method for Ore-controlling Volume of Flow Field for In-situ Leaching of Uranium

Yuanzineng kexue jishu
The effective hydrodynamic field and ore-controlling volume of the flow field for in-situ leaching of uranium are key parameters proposed in recent years to characterize the seepage and leaching features of underground water systems in-situ leaching of ...
LI Qinci1, 2, QUE Weimin1, 2, XIE Tingting1, 2, LI Zhaokun1, 2, WANG Sichen1, 2, ZOU Yuhan1, ZHAO Longhao1, 2, DU Zhiming1, 2, YANG Yihan3, ZHANG Chong1, 2
doaj   +1 more source

Mesoscopic Process Simulation of In Situ Leaching of Ionic Rare Earth Based on NMRI Technology

Adsorption Science & Technology, 2023
In order to simulate and calculate the leaching process of ionic rare earths more realistically, a digital model of ionic rare earths with real size, shape, seepage channel, and pore ratio and distribution at the mesoscopic scale was constructed based on
Fuyu Wu, Dan Wang, Yunzhang Rao, Meidao Zhang, Liang Shi, Min Han, Wei Xu   +6 more
doaj   +1 more source

Use of leaching tests to characterize landfill leachate in the long term period. Apllication in risk analysis [PDF]

, 2013
In this experimental work leaching tests on waste coming from two old uncontrolled landfill, simulating aerobic and anaerobic landfill operations. The results allowed a comparison between the two operating conditions, confirming the positive effects of ...
Polato, Francesca
core  

Support‐Controlled Reaction Pathways via Dynamic Sulfur‐Mediated Interfaces for Selective Urea Electrolysis

Advanced Functional Materials, EarlyView.
Sulfur‐doped graphitized carbon nanofibers act as adaptive catalyst–support platforms, enabling dynamic sulfur‐mediated reconstruction and strong metal–support interactions. This unique behavior enhances catalyst stability and controls reaction pathways, achieving highly selective urea oxidation (∼92% N2) coupled with efficient hydrogen evolution ...
Melanie Guillén‐Soler, Lucía Vizcaíno‐Anaya, Ahmad Tayyebi, José Manuel Vila‐Fungueiriño, María del Carmen Giménez‐López   +4 more
wiley   +1 more source

Evaluation of the impact of various agricultural practices on nitrate leaching under the root zone of potato and sugar beet using the STICS soil–crop model [PDF]

, 2008
The quaternary aquifer of Vitoria-Gasteiz (Basque Country, Northern Spain) is characterised by a shallow water table mainly fed by drainage water, and thus constitutes a vulnerable zone in regards to nitrate pollution. Field studies were performed with a
Antigüedad, Iñaki, Sanchez-Perez, Jose-Miguel, Justes, Eric, Sánchez-Pérez, J.M., Martinez, Miren, Jégo, Guillaume, Launay, Marie, Justes, Eric,, Sanchez-Pérez, José Miguel, Justes, Eric, E.   +9 more
core   +1 more source

Sustainable Electrochemical Synthesis of High‐Quality MXenes: Mechanistic Insights, Applications, Challenges, and Technological Prospects

Advanced Functional Materials, EarlyView.
Electrochemical etching provides an eco‐friendly alternative to hazardous HF methods for MXene production. This approach facilitates the selective isolation of the A‐layer from MAX phases with tunable surface terminations. Controlling voltage, electrolytes, temperature, and duration enables the optimal structural integrity. Nevertheless, existing scale
Jagdeep Singh, Madhusudhana M Devadiga, Santosh K. Tiwari, AS Dhaliwal, Gurpreet Singh Selopal   +4 more
wiley   +1 more source

Retention of pesticides in soil columns modified "in situ" and "ex situ" with a cationic surfactant [PDF]

, 2007
A study of the effect of a clayey soil modified in situ and ex situ with the cationic surfactant octadecyltrimethylammonium bromide (ODTMA), on the retention of linuron, atrazine and metalaxyl was carried out.
Sánchez-Martín, M.J. [0000-0002-8304-1232], Sánchez-Camazano, M., Rodríguez-Cruz, M.S. [0000-0001-6748-3391], Andrades, M.S. [0000-0003-4136-8656]   +3 more
core   +1 more source

Electrolyte‐Induced Cu+ Preservation Results in a Selectivity Switch of Electrocatalytic CO2 Reduction at a Copper‐Organic Framework as Electrocatalyst

Advanced Functional Materials, EarlyView.
The active role of KCl as a neutral electrolyte enables switching the selectivity on a Cu organic framework from C1 to C2+ products during electrocatalytic CO2 reduction. ABSTRACT We introduce a copper‐nicotinate (Cu‐NA) framework as a halogenide‐stabilized Cu+/Cu0 pre‐catalyst for electrocatalytic CO2 reduction with high C2+ selectivity in a “neutral”
Anirudha Shekhawat, Muhammad Adib Abdillah Mahbub, Lejing Li, Bashir Eid, Ridha Zerdoumi, Sabine Seisel, Carla Santana Santos, Nini Zhang, Thomas Quast, Xin Wang, Wolfgang Schuhmann, Debanjan Das   +11 more
wiley   +1 more source

Investigation of the Impact of Leaching Agent Concentration and pH on the Stability of Agglomeration of Ion-Absorbed Rare Earth Deposits

Geofluids, 2023
Ion-absorbed rare earth deposits react with the leaching agent during the in situ leaching process through ion exchange and hydration, which change the stability of ore agglomerates and even result in mining slopes or landslides.
Zhongquan Gao, Yunzhang Rao, Liang Shi, Xiaoming Zhang, Run Xiang   +4 more
doaj   +1 more source

Identification of Water-rock Reaction Mechanism for Uranium In-situ Recovery Desalination Process Based on Inversion Modelling

Yuanzineng kexue jishu, 2023
For the in-situ recovery (ISR) mining of sandstone-type uranium deposits with the high total dissolved solids (TDS), the desalination process of injecting fresh water was required.
WANG Bing1,2;LUO Yue1,3,*;QIAN Jiazhong2;GAO Bai1;LIU Jinhui1,3;LI Xun1;ZHANG Yanhong1,3;CHEN Qianqian1;LI Liyao3
doaj   +1 more source