Desorption Kinetics of Cadmium and Lead from Goethite

2002 ◽  
Vol 66 (3) ◽  
pp. 797 ◽  
Author(s):  
Leslie J. Glover ◽  
Matthew J. Eick ◽  
Patrick V. Brady
Keyword(s):  
Desorption Kinetics ◽  
Cadmium And Lead ◽  
Kinetics Of

Evaluation of DGT and DGT-PROFS modeling approach to estimate desorption kinetics of Cs in soils

2021 ◽  
Vol 235-236 ◽  
pp. 106646
Author(s):  
P. Ciffroy ◽  
L. Carasco ◽  
D. Orjollet ◽  
C. Simonucci ◽  
L. Février
Keyword(s):  
Desorption Kinetics ◽  
Modeling Approach ◽  
Kinetics Of

Desorption kinetics of heavy metals in the gleyic layer of permafrost-affected soils in Arctic region assessed by geochemical fractionation and DGT/DIFS

CATENA ◽  
2021 ◽  
Vol 206 ◽  
pp. 105539
Author(s):  
Xiaowen Ji ◽  
Yu Cheng ◽  
Evgeny Abakumov ◽  
Hao Zhang ◽  
Chao Han ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Arctic Region ◽  
Desorption Kinetics ◽  
Geochemical Fractionation ◽  
Kinetics Of

A molecular beam study of desorption kinetics of GeO from Ge(111) surfaces

1993 ◽  
Vol 283 (1-3) ◽  
pp. 64-69 ◽  
Author(s):  
Kouichi Sugiyama ◽  
Yoshiyuki Igari ◽  
Isao Kusunoki
Keyword(s):  
Molecular Beam ◽  
Desorption Kinetics ◽  
Kinetics Of

Two distinct mechanisms upon absorption of volatile organic compounds into siloxane polymers

Soft Matter ◽  
2018 ◽  
Vol 14 (12) ◽  
pp. 2206-2218 ◽  
Author(s):  
John E. Saunders ◽  
Hao Chen ◽  
Chris Brauer ◽  
McGregor Clayton ◽  
Hans-Peter Loock
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Desorption Kinetics ◽  
Volatile Organic ◽  
Siloxane Polymers ◽  
Kinetics Of

From measurements of the absorption and desorption kinetics of VOCs into polysiloxane materials evidence is found for two competing processes.

scholarly journals Improvement of Hydrogen Desorption Characteristics of MgH2 With Core-shell Ni@C Composites

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3113 ◽  
Author(s):  
Cuihua An ◽  
Qibo Deng
Keyword(s):  
Low Cost ◽  
Hydrogen Desorption ◽  
Core Shell ◽  
Desorption Kinetics ◽  
Hydrogen Storage Materials ◽  
High Hydrogen ◽  
Dehydrogenation Kinetics ◽  
Materials Research ◽  
High Theoretical Capacity ◽  
Kinetics Of

Magnesium hydride (MgH2) has become popular to study in hydrogen storage materials research due to its high theoretical capacity and low cost. However, the high hydrogen desorption temperature and enthalpy as well as the depressed kinetics, have severely blocked its actual utilizations. Hence, our work introduced Ni@C materials with a core-shell structure to synthesize MgH2-x wt.% Ni@C composites for improving the hydrogen desorption characteristics. The influences of the Ni@C addition on the hydrogen desorption performances and micro-structure of MgH2 have been well investigated. The addition of Ni@C can effectively improve the dehydrogenation kinetics. It is interesting found that: i) the hydrogen desorption kinetics of MgH2 were enhanced with the increased Ni@C additive amount; and ii) the dehydrogenation amount decreased with a rather larger Ni@C additive amount. The additive amount of 4 wt.% Ni@C has been chosen in this study for a balance of kinetics and amount. The MgH2-4 wt.% Ni@C composites release 5.9 wt.% of hydrogen in 5 min and 6.6 wt.% of hydrogen in 20 min. It reflects that the enhanced hydrogen desorption is much faster than the pure MgH2 materials (0.3 wt.% hydrogen in 20 min). More significantly, the activation energy (EA) of the MgH2-4 wt.% Ni@C composites is 112 kJ mol−1, implying excellent dehydrogenation kinetics.

Desorption Kinetics of Yttrium, Lanthanum, and Cerium from Soils

2002 ◽  
Vol 66 (4) ◽  
pp. 1198-1206 ◽  
Author(s):  
Bei Wen ◽  
Xiao-quan Shan ◽  
Jin-ming Lin ◽  
Gui-gang Tang ◽  
Nai-bin Bai ◽  
...  
Keyword(s):  
Desorption Kinetics ◽  
Kinetics Of
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