Surface metal contamination on tool components - A case study for evaluating acid extraction ICP-MS measurement process

2014 ◽  
Author(s):  
Shi Liu ◽  
Bin Liu
Keyword(s):  
Metal Contamination ◽  
Measurement Process ◽  
Acid Extraction ◽  
Icp Ms ◽  
Surface Metal

Tuning Transition Metal Carbides Activity by Surface Metal Alloying: Case Study on CO2 Capture and Activation

2018 ◽  
Author(s):  
Marti Lopez ◽  
Luke Broderick ◽  
John J Carey ◽  
Francesc Vines ◽  
Michael Nolan ◽  
...  
Keyword(s):  
Transition Metal ◽  
Co2 Capture ◽  
Density Functional ◽  
Deep Understanding ◽  
Metal Carbides ◽  
Transition Metal Carbides ◽  
Adsorption Sites ◽  
Surface Metal ◽  
A Minor

<div>CO2 is one of the main actors in the greenhouse effect and its removal from the atmosphere is becoming an urgent need. Thus, CO2 capture and storage (CCS) and CO2 capture and usage (CCU) technologies are intensively investigated as technologies to decrease the concentration</div><div>of atmospheric CO2. Both CCS and CCU require appropriate materials to adsorb/release and adsorb/activate CO2, respectively. Recently, it has been theoretically and experimentally shown that transition metal carbides (TMC) are able to capture, store, and activate CO2. To further improve the adsorption capacity of these materials, a deep understanding of the atomic level processes involved is essential. In the present work, we theoretically investigate the possible effects of surface metal doping of these TMCs by taking TiC as a textbook case and Cr, Hf, Mo, Nb, Ta, V, W, and Zr as dopants. Using periodic slab models with large</div><div>supercells and state-of-the-art density functional theory based calculations we show that CO2 adsorption is enhanced by doping with metals down a group but worsened along the d series. Adsorption sites, dispersion and coverage appear to play a minor, secondary constant effect. The dopant-induced adsorption enhancement is highly biased by the charge rearrangement at the surface. In all cases, CO2 activation is found but doping can shift the desorption temperature by up to 135 K.</div>

Environmental risks posed by heavy metal contamination from mine waste: Case study from northwest Iran

2018 ◽  
Vol 24 (6) ◽  
pp. 1532-1549
Author(s):  
S. Maryam Hosseini ◽  
Mana Kamranjam ◽  
Roger Brewer ◽  
Maryam Rezazadeh ◽  
Mahlagha Ghorbanli
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Mine Waste ◽  
Environmental Risks ◽  
Northwest Iran

Application of LA-ICP-MS trace-element analysis for precious metal deportment: a case study of the Kevitsa mine, Finland

2017 ◽  
Vol 29 (4) ◽  
pp. 635-644 ◽  
Author(s):  
Louis J Cabri ◽  
Michelle Kelvin ◽  
Zhaoping Yang ◽  
Simon E Jackson ◽  
Okan Altun
Keyword(s):  
Trace Element ◽  
Precious Metal ◽  
Trace Element Analysis ◽  
Element Analysis ◽  
Icp Ms
Sign in / Sign up

Export Citation Format

Share Document