Separation of cesium and strontium radionuclides by a highly dispersed silica being obtained by nitric acid treatment of serpentinite

2018 ◽  
Author(s):  
V. S. Semenishchev ◽  
E. G. Pecherskikh ◽  
A. N. Gabdullin
Keyword(s):  
Nitric Acid ◽  
Acid Treatment ◽  
Highly Dispersed Silica ◽  
Highly Dispersed ◽  
Strontium Radionuclides

A Study of Surface Modification on Adsorption Behaviors of Nanoporous Carbon

2007 ◽  
Vol 119 ◽  
pp. 211-214 ◽  
Author(s):  
Byeoung Ku Kim ◽  
Young Seak Lee ◽  
Seung Kon Ryu ◽  
Byung Joo Kim ◽  
Soo Jin Park
Keyword(s):  
Nitric Acid ◽  
Functional Groups ◽  
Carbon Fibers ◽  
Acid Treatment ◽  
Surface Acidity ◽  
Activated Carbon Fibers ◽  
Adsorption Behaviors ◽  
Toxic Gases ◽  
Adsorption Amount ◽  
Polar Functional Groups

In this work, to introduce polar functional groups on carbon surfaces, activated carbon fibers (ACFs) were treated by nitric acid in order to enhance the adsorption capacity of propylamine which was one of toxic gases in cigarette smoke. It was found that the polar functional groups were predominantly increased up to 2.0 M of nitric acid, resulting in the increase of total surface acidity. It was found that the adsorption amount of propylamine of the modified ACFs was increased around 17% after a nitric acid treatment. From the XPS results, it was observed that propylamine was reacted with strong or weak polar (acidic) groups, such as COOH, -COO or OH existed on the ACF surfaces.

Improvement in electrochemical capacitance of activated carbon from scrap tires by nitric acid treatment

2014 ◽  
Vol 8 (4) ◽  
pp. 391-398 ◽  
Author(s):  
Yan Han ◽  
Ping-Ping Zhao ◽  
Xiao-Ting Dong ◽  
Cui Zhang ◽  
Shuang-Xi Liu
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Acid Treatment ◽  
Electrochemical Capacitance ◽  
Scrap Tires

scholarly journals PREPARATION AND CHARACTERIZATION OF SILICA/PMMA COMPOSITES WITH HIGHLY DISPERSED SILICA—�?�DISPERSIBILITY

2012 ◽  
Vol 012 (5) ◽  
pp. 528-533
Author(s):  
Dong-ming Qi ◽  
Rui Zhang ◽  
Jie Xu ◽  
Xing-cong Shen ◽  
Ming-hua Wu
Keyword(s):  
Highly Dispersed Silica ◽  
Highly Dispersed

Infrared characteristic bands of highly dispersed silica

1964 ◽  
Vol 195 (1) ◽  
pp. 12-16 ◽  
Author(s):  
Tsutomu Takamura ◽  
Hiromi Yoshida ◽  
Kiyokatsu Inazuka
Keyword(s):  
Highly Dispersed Silica ◽  
Highly Dispersed

The effect of nitric acid (HNO3) treatment on the electrical conductivity and stability of poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) thin films

2017 ◽  
Vol 37 (2) ◽  
pp. 163-168 ◽  
Author(s):  
Suhana Mohd Said ◽  
Shahriar Mufid Rahman ◽  
Bui Duc Long ◽  
Subramanian Balamurugan ◽  
Norhayati Soin ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Nitric Acid ◽  
Acid Treatment ◽  
Base Material ◽  
Operating Conditions ◽  
Organic Polymer ◽  
Visible Range ◽  
Infrared Analysis ◽  
Conductivity Enhancement ◽  
Improved Stability

Abstract In this work, the posttreatment of an organic polymer is performed using an inorganic acid, nitric acid (HNO3). We picked poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the base material and improved its electrical conductivity by acid treatment with different concentrations of HNO3. The acid treatment was able to achieve the optimum electrical conductivity of 197 S/cm, which is 115.5 times higher than the base material when treated with an aqueous solution containing 65% of HNO3. Moreover, the films showed higher transparency in the visible range while conducting Fourier transform infrared analysis. In addition, the treated films showed improved stability against outdoor operating conditions in terms of sheet resistance compared with untreated PEDOT:PSS films. We tried to develop a hypothesis to describe the reason behind the electrical conductivity enhancement by studying the thicknesses of all the samples at different acid concentration levels. The results from atomic force microscopy, the Hall effect, and the trend of film thickness suggest that the conformational change, the removal of excess PSS from the polymer, and the increase in carrier concentration are the reasons behind the improvement in electrical conductivity.

Influence of Nitric Acid Treatment in Different Media on X-ray Structural Parameters of Coal

2008 ◽  
Vol 22 (6) ◽  
pp. 4087-4091 ◽  
Author(s):  
Sudip Maity ◽  
Ashim Choudhury
Keyword(s):  
Nitric Acid ◽  
Acid Treatment ◽  
Structural Parameters ◽  
X Ray
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