scholarly journals Oxidized coal as a sorbent for softening water

Surface ◽  
2021 ◽  
Vol 13(28) ◽  
pp. 188-196
Author(s):  
I. I. Voitko ◽  
◽  
V.A. Denisovich ◽  
T. V. Kibalnik ◽  
O. A. Sopruk ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Mass Loss ◽  
Oxidation State ◽  
Active Carbon ◽  
Water Softening ◽  
Specific Solution ◽  
Volumetric Capacity ◽  
Oxidized Coal ◽  
Sorption Volume ◽  
Solution Acidity

Sorption tests carried out oxidized nitric acid active carbon in H+- and Na+- form in relation to cations Mg2+ and Ca2+ and mixture thereof. Values obtained statistical volumetric capacity samples and mass loss them during processing nitric acid, that is oxidation state. Discovered correlation between these data and relevant sorption volume samples. Demonstrated a possible water softening oxidized coal subject to specific solution acidity.

Adsorption of sulfur dioxide by active carbon treated by nitric acid: II. Effect of preheating on the adsorption properties

Carbon ◽  
1997 ◽  
Vol 35 (10-11) ◽  
pp. 1645-1648 ◽  
Author(s):  
A. Lisovskii ◽  
G.E. Shter ◽  
R. Semiat ◽  
C. Aharoni
Keyword(s):  
Nitric Acid ◽  
Sulfur Dioxide ◽  
Active Carbon ◽  
Adsorption Properties

Platin in seiner ungewöhnlichen Oxidationsstufe + III: Diplatin(III)-Komplexe der Modellnukleobase 1-Methyluracil / Platinum in its Unusual Oxidation State + III: Diplatinum(III) Complexes with the Model Nucleobase 1-Methyluracil

1983 ◽  
Vol 38 (11) ◽  
pp. 1441-1445 ◽  
Author(s):  
Bernhard Lippert ◽  
Helmut Schöllhorn ◽  
Ulf Thewalt
Keyword(s):  
Crystal Structure ◽  
Nitric Acid ◽  
Ir Spectra ◽  
Oxidation State ◽  
Structural Similarity ◽  
Single Bond ◽  
Triclinic Space Group ◽  
H Nmr ◽  
Axial Ligands ◽  
Cell Dimensions

Oxidation of the head-tail dimer cis-[(NH3)2Pt(1-MeU)]2(NO3)2 (1-MeU = 1-methyl - uracilato anion, C5H5N2O2) with a mixture of nitrous and nitric acid yields three crystalline species, [(NO2)(NH3)2Pt(C5H5N2O2)2Pt(]SrH3)2(NO2)](NO3)2 · 3 H2O (1), [(H2O)(NH3)2Pt(C5H5N2O2)2Pt(]SrH3)2(NO2)](NO3)2 · 5 H2O (2) and [(NO3)(NH3)2Pt(C5H5N2O2)2Pt(]SrH3)2(NO3)](NO3)2 · 4.5 H2O (3). The crystal structure of 2 has been determined. 2 crystallizes in the triclinic space group P1̄ with cell dimensions a= 11.959(4), b= 11.560(3), c= 11.261(2) Å, α = 89.16(2), β= 104.36(2), γ = 99.61(2)° and Z = 2. The structure was refined to R = 0.056, Rw = 0.061 on 4311 reflections. The Pt-Pt distance within the dinuclear cation of 2 is 2.574(1) Å and cor­responds to a Pt-Pt single bond. The axial ligands are N̲O2 (Ptl) and O̲H2 (Pt2), the equatorial ligands two NH3 groups, N 3 and O4 of 1-MeU for both Pt atoms. The oxidation state of Pt in 2 is +III. 1H NMR and IR spectra of 1, 2, and 3 reveal a close structural similarity of the three compounds.

scholarly journals Study of the process of obtaining liquid complex fertilizers

2020 ◽  
pp. 182-184
Author(s):  
Davron Isabaev ◽  
Miyasar Jumanova
Keyword(s):  
Nitric Acid ◽  
Potassium Chloride ◽  
Ammonium Nitrate ◽  
Acid Decomposition ◽  
Technological Parameters ◽  
Fertilizer Plant ◽  
Potash Fertilizer ◽  
Oxidized Coal

It is shown that possible in principle to obtain new effective forms of liquid complex fertilizers based on the products of nitric acid decomposition of phosphorite flour, ammonium nitrate, potassium chloride of the UE of the Dekhkanabad potash fertilizer plant and ammonium humate from the oxidized coal of the Angren deposit. On the basis of the conducted research, the optimal technological parameters and conditions for obtaining new forms of complex fertilizers were established.

scholarly journals Influence of moisture content on NO2 sorption ability of cedar wood

2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Miyuki Nakagawa ◽  
Shuichi Kawai ◽  
Kozo Kanayama ◽  
Kenji Umemura
Keyword(s):  
Nitric Acid ◽  
Moisture Content ◽  
Cryptomeria Japonica ◽  
Initial Period ◽  
Nitric Acid Concentration ◽  
Adsorbed Water ◽  
Bonding Condition ◽  
Sorption Ability ◽  
Sorption Volume

AbstractThis study examined the influence of moisture content (MC) on NO2 sorption ability of cedar (Cryptomeria japonica) wood using the specimens with different MCs. Four MC conditions were applied, namely 0%, 8.6%, 12.7% and 16.5%, based on the differences of bonding condition of water molecule in the wood substances. As a result, the NO2 sorption volume increased drastically due to the presence of water, and as the MC increased, the NO2 sorption volume increased slightly. The NO generation volume and nitric acid concentration in the specimens were evaluated after an aeration test, and it was strongly indicated that the NO2 reacted with water in the specimen, and that the NO generation volume increased as the content of multilayer adsorbed water increased. The nitric acid seemed to be formed by the reaction between NO2 and water, and it was then held in the specimen. Based on the NO2 sorption volume calculated using the NO generation volume, it was shown that the NO2 sorption after 12-h aeration was caused mainly by the reaction between NO2 and water. Furthermore, the presence of both water and extractives contributed to the NO2 sorption in the initial period, and the presence of water contributed greatly to the NO2 sorption over the long term.

The effect of active carbon on the reduction of concentrated nitric acid by HCOOH

2006 ◽  
Vol 293 (1) ◽  
pp. 43-51 ◽  
Author(s):  
Akane Miyazaki ◽  
Kazumasa Shibazaki ◽  
Ioan Balint
Keyword(s):  
Nitric Acid ◽  
Active Carbon
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