Influence of sulfhydryl collectors on formation of copper-ion-bearing precipitates in aqueous solutions

2009 ◽  
Vol 45 (1) ◽  
pp. 75-79 ◽  
Author(s):  
V. A. Ignatkina ◽  
V. D. Samygin ◽  
V. A. Bocharov
Keyword(s):  
Aqueous Solutions ◽  
Copper Ion ◽  
Sulfhydryl Collectors

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.

Stabilization of organometallic halide perovskite nanocrystals in aqueous solutions and their applications in copper ion detection

2018 ◽  
Vol 54 (45) ◽  
pp. 5784-5787 ◽  
Author(s):  
Chunqing Ma ◽  
Ming-Fai Lo ◽  
Chun-Sing Lee
Keyword(s):  
Aqueous Solutions ◽  
Copper Ion ◽  
Two Dimensional ◽  
Ion Detection ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite

Stabilization of two-dimensional PEA2PbI4 perovskite nanocrystals in water is achieved by controlling the PEA+ concentration.

Two Different States of Copper Ions in Zeolites

2014 ◽  
Vol 880 ◽  
pp. 151-154 ◽  
Author(s):  
Andrey Efimov ◽  
Alexey Pestryakov ◽  
Miguel Ángel Hernández Espinosa ◽  
Fernando Chávez Rivas ◽  
Vitalii Petranovskii
Keyword(s):  
Aqueous Solutions ◽  
Copper Ions ◽  
Copper Ion ◽  
Zeolite X ◽  
Copper Salts ◽  
Coordination Polyhedra ◽  
Oxygen Coordination ◽  
Different Temperatures ◽  
Copper Cations ◽  
Isolated Species

This work is devoted to the study of copper ion positions in zeolite matrices. Copper cations were exchanged in mordenite and zeolite X from aqueous solutions of different copper salts varying their concentrations. Electronic state of copper in ion-exchanged samples exchanged and dried at different temperatures was evaluated by XPS spectroscopy. Depending on conditions of exchange treatment copper was found to be distributed between two different accessible sites in zeolites. These copper ions are stabilized as isolated species with well-defined oxygen coordination polyhedra.

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.

scholarly journals Adsorption of copper ion from aqueous solutions by well-crystalized nanosized hydroxyapatite

2020 ◽  
Vol 6 (12) ◽  
pp. 125545 ◽  
Author(s):  
Kubra Ulucan-Altuntas ◽  
Halil Ibrahim Uzun ◽  
Cem Bulent Ustundag ◽  
Eyup Debik
Keyword(s):  
Aqueous Solutions ◽  
Copper Ion ◽  
Nanosized Hydroxyapatite

The removal and recovery of copper (II) ions from wastewater by magnetite immobilized cells of Pseudomonas putida 5-X

1998 ◽  
Vol 38 (4-5) ◽  
pp. 315-322 ◽  
Author(s):  
H. Chua ◽  
P. K. Wong ◽  
P. H. F. Yu ◽  
X. Z. Li
Keyword(s):  
Aqueous Solutions ◽  
Pseudomonas Putida ◽  
Immobilized Cells ◽  
Copper Ion ◽  
Copper Removal ◽  
Recovery Rates ◽  
Biosorption Capacity ◽  
Batch Type ◽  
Removal And Recovery

Magnetite-immobilized cells of Pseudomonas putida 5-X can be used as biosorbent in copper removal from aqueous solutions. Dilute HCl pretreated magnetite-immobilized cells of Pseudomonas putida 5-X were used in this study for the treatment of wastewater streams containing copper (II) concentrations as high as 100 mg/L. The biosorbent removal and recovery operations were carried out using a series of three batch type biosorption reactors. It was observed that the dilute HCl pretreated magnetite-immobilized cells of Pseudomonas putida 5-X had higher biosorption capacity than that observed on the fresh cells of magnetite-immobilized cells of Pseudomonas putida 5-X. The removal and recovery rates of biosorbent were 96% and 95%, respectively. The process was reversible. The concentrations of copper ion (II) in the recovery solution could be as high as 1.4 g/L and could be successfully recovered using 0.6 N HCl.

scholarly journals Removal of copper from copper-contaminated river water and aqueous solutions using Methylobacterium extorquens modified Erzurum clayey soil

2016 ◽  
Vol 42 (4) ◽  
pp. 58-69 ◽  
Author(s):  
Neslihan Celebi ◽  
Hayrunnisa Nadaroglu ◽  
Ekrem Kalkan ◽  
Recep Kotan
Keyword(s):  
Aqueous Solutions ◽  
River Water ◽  
Clay Soil ◽  
Clayey Soil ◽  
Copper Ions ◽  
Copper Ion ◽  
Methylobacterium Extorquens ◽  
Copper Adsorption ◽  
Modified Clay ◽  
Freundlich Isotherms

Abstract The objective of this study was to investigate the possibility of using natural and bacteria-modified Erzurum clayey soil with Methylobacterium extorquens as an alternative to high cost commercial adsorbent materials for the removal of copper from aqueous solution. The copper concentrations in the samples of the polluted river water and CuCl2 solutions treated by the natural and bacteria-modified Erzurum clayey soil (ECS) have been determined by spectrophotometric method. Firstly, the surface of ECS was modified with M. extorquens and surface functionality was increased. Then, the adsorption of Cu (II) from solution phases was studied with respect to varying metal concentration, pH, and temperature and agitation time. The maximum adsorption of Cu (II) for natural and bacteria-modified Erzurum clayey soil was observed at pH: 5.0. At different copper concentrations, copper adsorption analysis was performed on 1 g using clay soil or modified clay soil. Maximum adsorption of Cu (II) was obtained as 45.7 and 48.1 mg g-1 at initial concentration (50 mg/50 mL) and optimal conditions by natural and bacteria-modified clay soil, respectively. The copper concentration was decreased in the substantial amount of the leachates solutions of natural and bacteria-modified clay soil. Langmuir and Freundlich isotherms were used to describe the adsorption behavior of Cu (II) ions. The results showed that modified clay soil had a high level of adsorption capacity for copper ion. The various thermodynamic parameters such as ΔG°, ΔH° and ΔS° were analyzed to observe the nature of adsorption. The structural properties of the natural and bacteria-modified-ECS have been characterized by SEM, FTIR and XRD techniques. Consequently, it was concluded that the bacteria-modified clay soil could be successfully used for the removal of the copper ions from the aqueous solutions.

Sign in / Sign up

Export Citation Format

Share Document