MODELING OF COPPER ION REMOVAL FROM AQUEOUS SOLUTIONS USING MODIFIED SILICA BEADS

2000 ◽  
Vol 181 (1) ◽  
pp. 37-55 ◽  
Author(s):  
HYUNJOO LEE ◽  
JONGSUNG KIM ◽  
JONGHEOP YI
Keyword(s):  
Aqueous Solutions ◽  
Copper Ion ◽  
Modified Silica ◽  
Ion Removal ◽  
Silica Beads

scholarly journals Mxene/alginate composites for lead and copper ion removal from aqueous solutions

RSC Advances ◽  
2019 ◽  
Vol 9 (50) ◽  
pp. 29015-29022 ◽  
Author(s):  
Yanjie Dong ◽  
Dashen Sang ◽  
Chengdong He ◽  
Xinfeng Sheng ◽  
Longwen Lei
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
High Efficiency ◽  
Copper Ion ◽  
High Adsorption ◽  
Ion Removal ◽  
High Adsorption Capacity

Studies on Mxene/alginate composite adsorption have opened up a new avenue for designing adsorbents possessing high adsorption capacity and high efficiency.

A novel immobilized trypsin on hydrophilic polymer modified silica beads for proteome characterization

2013 ◽  
Vol 31 (5) ◽  
pp. 423
Author(s):  
Chao FAN ◽  
Zifeng SONG ◽  
Weijie QIN ◽  
Yun CAI ◽  
Xiaohong QIAN
Keyword(s):  
Hydrophilic Polymer ◽  
Modified Silica ◽  
Immobilized Trypsin ◽  
Silica Beads

Temperature-modulated cell-separation column using temperature-responsive cationic copolymer hydrogel-modified silica beads

2019 ◽  
Vol 178 ◽  
pp. 253-262 ◽  
Author(s):  
Kenichi Nagase ◽  
Daimu Inanaga ◽  
Daiju Ichikawa ◽  
Aya Mizutani Akimoto ◽  
Yutaka Hattori ◽  
...  
Keyword(s):  
Cell Separation ◽  
Modified Silica ◽  
Copolymer Hydrogel ◽  
Temperature Responsive ◽  
Separation Column ◽  
Silica Beads

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.

scholarly journals Ein Wasserstoffisotopieeffekt im CuSO4 * 5H2O

1969 ◽  
Vol 24 (10) ◽  
pp. 1502-1511
Author(s):  
Karl Heinzinger
Keyword(s):  
Water Vapor ◽  
Aqueous Solutions ◽  
Separation Factor ◽  
Room Temperature ◽  
Copper Ion ◽  
Hydrogen Isotopes ◽  
Bulk Water ◽  
Water Molecules ◽  
Hydration Water ◽  
Sulfate Solutions

Abstract There are two kinds of water in CuSO4·5H2O differing by their binding in the crystal. The oxygen of four water molecules is bonded to the copper ion, that of the fifth molecule is hydrogen bonded. It is shown that the D/H ratios of these two kinds of water differ by 5.7%, the light isotope being enriched in the water molecules coordinated with the copper ion. The results show that there is no exchange of the hydrogen isotopes during the time needed for dehydration at room temperature which takes several days. The assumption has been confirmed that the water coordinated with the copper ion leaves the crystal first on dehydration at temperatures below 50 °C. Additional measurements of the separation factor for the hydrogen isotopes between water vapor and copper sulfate solutions allow conclusions on the fractionation of the hydrogen isotopes between bulk water and hydration water in aqueous solutions.

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