Removal of Cu ions in wastewater through a combined foam separation–cell adsorption approach

2021 ◽  
Author(s):  
Hongya Hou ◽  
SiYu Li ◽  
ZhiChao Meng ◽  
Zhiqiang Li ◽  
Osama M. Darwesh ◽  
...  
Keyword(s):  
Foam Separation ◽  
Cell Adsorption ◽  
Separation Cell ◽  
Cu Ions

Nitrite enhanced copper-based Fenton reactions for biofilm removal

2021 ◽  
Author(s):  
Li Wang ◽  
Rui Peng ◽  
Xue Liu ◽  
Chendi Heng ◽  
Yanni Miao ◽  
...  
Keyword(s):  
Fenton Chemistry ◽  
Biofilm Removal ◽  
Removal Technology ◽  
Cu Ions

Unwanted biofilms present challenges for many industries. Herein an innovative biofilm removal technology was developed based on nitrite-accelerated Fenton chemistry, where both dissolved Cu ions and nano-CuO surfaces efficiently generate...

scholarly journals The Properties of Cu Ions in Zeolites CuY Studied by IR Spectroscopy

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4686
Author(s):  
Jerzy Podobiński ◽  
Mariusz Gackowski ◽  
Grzegorz Mordarski ◽  
Katarzyna Samson ◽  
Michał Śliwa ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Positive Charge ◽  
Co Adsorption ◽  
The Other ◽  
Probe Molecules ◽  
Adsorption And Desorption ◽  
Other Hand ◽  
Close Proximity ◽  
No And Co Adsorption ◽  
Cu Ions

The properties of both Cu2+ and Cu+ ions in zeolite CuY were followed with NO and CO as probe molecules. Cu2+ was found to be located in SII, SII*, and SIII sites, whereas Cu+ was found in SII and SII* sites. The fine analysis of the spectra of Cu2+-NO and Cu+-CO adducts suggests that both in SII and in SII* sites two kinds of Cu cations exist. They differ in the positive charge, which may be related to the varying numbers of AlO4− in close proximity. The experiments of NO and CO adsorption and desorption evidenced that both Cu2+ and Cu+ sites of highest positive charge bind probe molecules most strongly but activate them to a lesser extent than the Cu sites of lowest positive charge. The experiments of reduction with hydrogen evidenced that the Cu ions of higher positive charge are first reduced by hydrogen. On the other hand, Cu sites of the lowest positive charge are first oxidized by oxygen. The experiments with CuNaY zeolites of various Cu contents suggest that the first introduced Cu (at low Cu contents) created Cu+, which was the most neutralized by framework oxygens. Such Cu cations are the most stabilized by framework oxygens.

scholarly journals An Investigation on Design and Characterization of a Highly Selective LED Optical Sensor for Copper Ions in Aqueous Solutions

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1099
Author(s):  
Sheng-Chun Hung ◽  
Chih-Cheng Lu ◽  
Yu-Ting Wu
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Copper Ions ◽  
Incident Light ◽  
Copper Ion ◽  
Intensity Change ◽  
Optical Absorbance ◽  
Sensing System ◽  
Optic Sensor ◽  
Cu Ions

The optical characteristics of copper ion detection, such as the photometric absorbance of specific wavelengths, exhibit significant intensity change upon incident light into the aqueous solutions with different concentrations of metal ions due to the electron transition in the orbit. In this study, we developed a low-cost, small-size and fast-response photoelectric sensing prototype as an optic sensor for copper (Cu) ions detection by utilizing the principle of optical absorption. We quantified the change of optical absorbance from infra-red (IR) light emitting diodes (LEDs) upon different concentrations of copper ions and the transmitted optical signals were transferred to the corresponding output voltage through a phototransistor and circuit integrated in the photoelectric sensing system. The optic sensor for copper (Cu) ions demonstrated not only excellent specificity with other metal ions such as cadmium (Cd), nickel (Ni), iron (Fe) and chloride (Cl) ions in the same aqueous solution but also satisfactory linearity and reproducibility. The sensitivity of the preliminary sensing system for copper ions was 29 mV/ppm from 0 to 1000 ppm. In addition, significant ion-selective characteristics and anti-interference capability were also observed in the experiments by the proposed approach.

Ferromagnetic modification of GaN film by Cu+ ions implantation

2010 ◽  
Vol 268 (2) ◽  
pp. 123-126 ◽  
Author(s):  
B. Zhang ◽  
C.C. Chen ◽  
C. Yang ◽  
J.Z. Wang ◽  
L.Q. Shi ◽  
...  
Keyword(s):  
Ions Implantation ◽  
Cu Ions ◽  
Gan Film

Valency and solubility limit of Cu ions in cubic and hexagonal phases of ZnS:Cu:Mn:Dy(Cl) phosphors

1991 ◽  
Vol 41 (10) ◽  
pp. 951-957
Author(s):  
P. R. Bote ◽  
P. K. Patil ◽  
J. K. Nandagave ◽  
R. D. Lawangar-Pawar
Keyword(s):  
Solubility Limit ◽  
Cu Ions

scholarly journals Corrosion resistance study of grey cast iron implanted with C, N, Cr and Cu ions

2017 ◽  
Vol 87 ◽  
pp. 092030 ◽  
Author(s):  
O Yu Usanova ◽  
L A Maryushin ◽  
A Yu Kazantsev ◽  
A I Dyukova
Keyword(s):  
Corrosion Resistance ◽  
Cast Iron ◽  
Grey Cast Iron ◽  
Grey Cast ◽  
Cu Ions

Permeability of Plant Young Root Endodermis to Cu Ions and Cu-Citrate Complexes in Corn and Soybean

2015 ◽  
Vol 17 (9) ◽  
pp. 822-834 ◽  
Author(s):  
Yanzhao Fu ◽  
Wenrui Lei ◽  
Zhenguo Shen ◽  
Chunling Luo
Keyword(s):  
Young Root ◽  
Cu Ions ◽  
Root Endodermis

scholarly journals QUALITATIVE DIFFERENCES IN THE ANTIGENIC COMPOSITION OF INFLUENZA A VIRUS STRAINS

1944 ◽  
Vol 79 (6) ◽  
pp. 633-647 ◽  
Author(s):  
William F. Friedewald
Keyword(s):  
Influenza A Virus ◽  
Influenza A ◽  
Serum Antibody ◽  
Allantoic Fluid ◽  
Influenza B Virus ◽  
Influenza B ◽  
Red Cell ◽  
Homologous Virus ◽  
Cell Adsorption ◽  
Virus Strains

A study of the PR8, Christie, Talmey, W.S., and swine strains of influenza A virus by means of antibody absorption tests revealed the following findings: 1. Serum antibody could be specifically absorbed with allantoic fluid containing influenza virus or, more effectively, with concentrated suspensions of virus obtained from allantoic fluid by high-speed centrifugation or by the red cell adsorption and elution technique. Normal allantoic fluid, or the centrifugalized sediment therefrom, failed to absorb antibodies. Influenza B virus (Lee) caused no detectable absorption of antibody from antisera directed against influenza A virus strains, but it specifically absorbed antibody from Lee antisera. 2. The neutralizing, agglutination-inhibiting, and complement-fixing anti-bodies in ferret antisera were completely absorbed only by the homologous virus strain, even though 2 absorptions were carried out with large amounts of heterologous virus strains. 3. PR8 virus appeared to have the broadest range of specific antigenic components for it completely absorbed the heterologous antibodies in Christie and W.S. antisera and left only those antibodies which reacted with the respective homologous strains. The other virus strains (Christie, Talmey, W.S., swine) were more specific in the absorption of heterologous antibodies and completely removed only those antibodies which reacted with the absorbing virus. 4. The absorption tests revealed a higher degree of specificity and individuality of the virus strains than the various cross reactions previously reported. The strain specificity of PR8 virus was equally manifest in absorption tests with ferret sera and with human sera following vaccination. 5. The amount of homologous antibody remaining in a PR8 ferret serum after absorption with PR8 virus, obtained by the red cell adsorption and elution method, varied inversely as the concentration of virus used for absorption. A given concentration of virus, however, absorbed a greater percentage of neutralizing antibodies than either agglutination-inhibiting or complement-fixing antibodies.

scholarly journals Copper–CNT interfacing with Cu-doped polydopamine in CNT carpet: copper nucleation and resistance decrease upon soft annealing

RSC Advances ◽  
2021 ◽  
Vol 11 (20) ◽  
pp. 11900-11909
Author(s):  
Antoine Duhain ◽  
Jérôme Guillot ◽  
Guillaume Lamblin ◽  
Damien Lenoble
Keyword(s):  
Sheet Resistance ◽  
Resistance Decrease ◽  
Cu Ions ◽  
Copper Nucleation

The annealing of carpets of CNT coated with Cu-doped polydopamine lowers the carpets sheet resistance and induces the reduction of Cu ions into metallic Cu particles nucleating at the CNT surface.

Sign in / Sign up

Export Citation Format

Share Document