Results 111 to 120 of about 17,959 (285)

In situ study of metal leaching from Pd/Al2O3 induced by K2CO3 [PDF]

, 2019
In situ time- and spatially-resolved Quick Extended X-ray Absorption Fine Structure Spectroscopy (QEXAFS) was deployed to study the leaching of Pd from a heterogeneous catalyst caused by K2CO3 temporally and ...
Mulligan, Christopher, Alxneit, Ivo, Thompson, Paul, Hii, King Kuok, Ferri, Davide, Newton, Mark, Emerich, Hermann   +6 more
core   +1 more source

Bioinspired Interfacial Hydration Engineering via Metal–Organic Frameworks for Efficient Nitrate‐To‐Ammonia Conversion in Neutral Media

Advanced Science, EarlyView.
Inspired by Nitrite reductase, a metal–organic framework overlayer is introduced to regulate the interfacial hydration microenvironment on Cu electrodes, enriching hydrated K+ species that act as efficient proton donors. This strategy enables nitrate‐to‐ammonia conversion with near‐unity selectivity at industrial‐level current densities in neutral ...
Yuyin Mao, Minghui Zhang, Xiangdong Xue, Chengyu Guo, Jian Liu   +4 more
wiley   +1 more source

Orthogonal Design of Competing Deprotonation Process in Cation‐Mediated Ni(OH)2 for Achieving Industrial Level Biomass Electrooxidation

Advanced Science, EarlyView.
A Cu‐mediated Ni(OH)2 catalyst with orthogonal activity by precise valence engineering simultaneously accelerates rate‐determining aldehyde C─H activation in HMF oxidation and impedes O─H deprotonation in competing OER. This multi‐functional synergistic catalysis enables FDCA production at industrial‐level current densities without sacrificing FEFDCA ...
Junge Yang, Zhengjie Chen, Lili Zhang, Tao Zhang, Shida Bao, Jing Peng, Hui Pan, Hui‐Ming Cheng   +7 more
wiley   +1 more source

In-Situ and Laboratory Investigation on Leaching and Effects of Early Curing of Shotcrete

, 2019
During the construction of a rock tunnel in Stockholm, several sections with leaching shotcrete (sprayed concrete) were found one year after the spraying was completed. An investigation was therefore conducted, and its results are presented in this paper.
Sjölander, Andreas, Ansell, Anders, Sjölander, Andreas,, Ansell, Anders,   +3 more
core   +1 more source

Cobalt Single‐Atom Catalysts for Ultrafast Sulfamethoxazole Degradation: Unveiling the Chloride‐Ion‐Enhanced Formation of Co(IV)=O

Advanced Science, EarlyView.
An atomically dispersed Co–N4 single‐atom catalyst rapidly activates peroxymonosulfate to remove the antibiotic sulfamethoxazole from water. Common ions have little impact, but chloride dramatically speeds degradation by promoting a high‐valent Co(IV) = O oxidant via in situ HOCl–catalyst electron transfer.
Anting Ding, Jing Lu, Yafei Fan, Chenyu Zeng, Yuhang Lin, Yufei Shi, Zulin Zhang   +6 more
wiley   +1 more source

Transport kinetics of Pollutants in In-Situ Leaching of Ionic Type Rare-Earth Ore

, 2012
Taking Ganzhou city longnan zudong in-situ leaching of ionic rare earth ore soil as the research object, (NH4) 2SO4 as the leaching agent,we forecast and analyze leaching residues pollutants’diffusion rule over time in the soil layer.
tao, Tao, yichun, Zhu, Xiujuan, Feng
core   +1 more source

Hydrothermal Humification of Biomass for Circular Carbon Management in Sustainable Agro‐Ecosystems

Advanced Science, EarlyView.
This article provides a comprehensive overview of biomass hydrothermal humification for building sustainable agro‐ecosystems. It examines the chemical transformation mechanisms and the functional benefits of the produced humic acids in soil remediation.
Ziyun Liu, Zonglu Yao, Yuanhui Zhang, Huiyan Zhang, Lixin Zhao   +4 more
wiley   +1 more source

Retención de pesticidas por suelos modificados "in situ" y "ex situ" con un surfactante catiónico

, 2005
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 is carried out. Leaching of these compounds was studied in
Sánchez Martín, María Jesús, Rodríguez Cruz, María Sonia [0000-0001-6748-3391], Andrades Rodríguez, María Soledad, Sánchez Martín, María Jesús [0000-0002-8304-1232], Andrades Rodríguez, María Soledad [0000-0003-4136-8656], Rodríguez Cruz, María Sonia, Sánchez Camazano, María   +6 more
core  

Spike‐Embedded Nanocatalysts via Metal‐Directed Carbonization for Highly Efficient and Robust Semi‐Hydrogenation

Advanced Science, EarlyView.
A metal‐directed carbonization strategy transforms hierarchical organic microspheres into spiky carbon catalysts with Pd nanoparticles embedded at the tips. This approach resolves the activity‐stability trade‐off, achieving exceptional poison resistance in semi‐hydrogenations, offering a versatile, scalable platform for designing high‐performance ...
Yintao Li, Yang Sun, Minghang Li, Wenxuan Zhang, Zhengtao Li, Yihao Ni, Yao Zhang, Yong Wang, Samuel S. Veroneau, Pengfei Ji   +9 more
wiley   +1 more source

In situ acid leaching of copper tailings deposits

, 2001
The results of a field-scale study involving in situ leaching of copper ore tailings using sulphuric acid as the leaching agent, injection wells to introduce the leaching solution and extraction wells to recover the copper-enriched pregnant leaching ...
Rengifo, P, Suazo, A, Vauclin, M, Shackelford, CD, Muñoz, JF   +4 more
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