scholarly journals Solvent Extraction of Transition Metal Ions by an in situ Extractant Formation Method. Diethyldithiocarbamate-Forming System.

1997 ◽  
Vol 13 (2) ◽  
pp. 225-230 ◽  
Author(s):  
Kaoru FUJINAGA ◽  
Yasushi SEIKE ◽  
Minoru OKUMURA
Keyword(s):  
Solvent Extraction ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Formation Method

scholarly journals The migration mechanism of transition metal ions in LiNi0.5Mn1.5O4

2015 ◽  
Vol 3 (24) ◽  
pp. 13031-13038 ◽  
Author(s):  
Gui-Liang Xu ◽  
Yan Qin ◽  
Yang Ren ◽  
Lu Cai ◽  
Ke An ◽  
...  
Keyword(s):  
Transition Metal ◽  
Neutron Diffraction ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Migration Mechanism

In situ high-energy X-ray diffraction and neutron diffraction were deployed to trace the migration of transition metal ions in LiNi0.5Mn1.5O4.

Highly Selective Solvent Extraction of Copper(II) from Transition Metal Ions with DibutylN,N′-Bis(8-quinolyl)malonamide

1989 ◽  
Vol 18 (11) ◽  
pp. 2073-2076 ◽  
Author(s):  
Kazuhisa Hiratani ◽  
Kazuhiro Taguchi ◽  
Kozaburo Ohhashi ◽  
Hiroshi Nakayama
Keyword(s):  
Solvent Extraction ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Selective Solvent ◽  
Selective Solvent Extraction

In Situ Remediation of Groundwater Contaminated by Heavy- and Transition-Metal Ions by Selective Ion-Exchange Methods

2002 ◽  
Vol 36 (8) ◽  
pp. 1851-1855 ◽  
Author(s):  
Mark Y. Vilensky ◽  
Brian Berkowitz ◽  
Abraham Warshawsky
Keyword(s):  
Ion Exchange ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
In Situ Remediation

Kraft pulp bleaching using dimethyldioxirane: stability of the oxidants

1996 ◽  
Vol 74 (2) ◽  
pp. 232-237 ◽  
Author(s):  
J. Bouchard ◽  
C. Maine ◽  
R.M. Berry ◽  
D.S. Argyropoulos
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Kraft Pulp ◽  
Transition Metal Ions ◽  
Pulp Bleaching ◽  
Simultaneous Generation ◽  
Kraft Pulp Bleaching ◽  
Alkaline Conditions

Dimethyldioxirane (DMD) is a cyclic peroxide made by oxidizing acetone with peroxymonosulfate (PMS) in water buffered at pH 7.5 using sodium bicarbonate. It has been shown that DMD generation can be achieved in situ within a pulp suspension allowing very selective TCF bleaching of kraft pulp. This process involves simultaneous generation of DMD, reaction of PMS and DMD with residual lignin, and spontaneous decomposition of both oxidants. The first part of this work is a kinetics study of the decomposition of PMS and DMD as a function of pH under conditions similar to those for in situ bleaching. The effect of chelation as well as the effect of transition metal ions on decomposition rate was also investigated. DMD is very sensitive to pH and its half-life is very short under alkaline conditions. The presence of any transition metal ion that can be involved in a one-electron transfer is detrimental to DMD stability. However, fast reaction of DMD with pulp almost counteracts the effect of metal ions. Key words: bleaching, peroxymonosulphate, dimethyldioxirane, metal ions, kinetics, decomposition, kraft pulp.

Synergistic activation of peroxymonosulfate via in situ growth FeCo2O4 nanoparticles on natural rectorite: Role of transition metal ions and hydroxyl groups

Chemosphere ◽  
2021 ◽  
Vol 263 ◽  
pp. 127965
Author(s):  
Zhiming Sun ◽  
Xiaorui Liu ◽  
Xiongbo Dong ◽  
Xiangwei Zhang ◽  
Ye Tan ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Hydroxyl Groups ◽  
In Situ Growth ◽  
Synergistic Activation
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