Extraction Mechanism for Copper(II) with 2-Hydroxy-4-<i>n</i>-octyloxybenzophenone Oxime

Baba, Yoshihiro; Iwakuma, Minako; Nagami, Hideto

doi:10.1021/ie0106736

Cited by 15 publications

(9 citation statements)

References 17 publications

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“…To remove heavy metal ions, various physical and chemical methods are used, which include, but are not limited to, adsorption, solvent extraction [21], ion exchange [22], precipitation [23], filtration [24,25], and photocatalytic degradation [26,27]. Adsorption processes with different cost effective porous adsorbents draw much attention due to their high removal capacity with selectivity, ease and simplicity of operation, and low generation of harmful byproducts [28].…”

Section: Introductionmentioning

confidence: 99%

Removal of Arsenic(III) from Aqueous Solution Using Metal Organic Framework-Graphene Oxide Nanocomposite

Chowdhury

Zhang

et al. 2018

Nanomaterials

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MIL-53(Al)-graphene oxide (GO) nanocomposites of different GO to MIL-53(Al) mass ratios (1% to 25% GO) were synthesized and tested for removal of arsenite (As(III)), which is a well-known groundwater contaminant. The properties of MIL-53(Al)-GO nanocomposites were characterized using X-ray Diffraction (XRD), Fourier Transform Infrared (FT-IR) Spectroscopy, Brunauer-Emmett-Teller (BET) surface area measurements, and Scanning Electron Microscopy (SEM). Batch experiments were performed on MIL-53(Al)-GO nanocomposites for As(III) adsorption in aqueous solutions to investigate adsorption kinetics and isotherm behavior under varying environmental conditions. The effects of solution pH (2 to 11), initial As(III) concentrations (10–110 mg/L), adsorbent dosage (0.2–3.0 g/L), and temperature (298–318 K) on As(III) adsorption were investigated. MIL-53(Al)-GO nanocomposites showed higher adsorption of As(III) than pristine MIL-53(Al) and GO individually. As (III) removal was optimized at a ratio of 3% GO in the MIL-53(Al)-GO nanocomposite, with an adsorption capacity of 65 mg/g. The adsorption kinetics and isotherms followed pseudo-second-order and Langmuir isotherm models, respectively. Overall, these results suggest that MIL-53(Al)-GO nanocomposite holds a significant promise for use in the remediation of As (III) from groundwater and other aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Removal of Arsenic(III) from Aqueous Solution Using Metal Organic Framework-Graphene Oxide Nanocomposite

Chowdhury

Zhang

et al. 2018

Nanomaterials

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“…The development of a microfluidic processing platforms offers (i) the use of low sample volumes, eliminating the need for excessive dilution; (ii) allows rapid interface stabilization; (iii) produces much smaller amounts of organic solvent waste; and (iv) enhances the extraction efficiency of radio metal due to the large interfacial area and small diffusional lengths attained in microfluidic systems. Here, we demonstrate the application of SIFEL-based microfluidic platform to extract radioactive copper (Cu-64) from an aqueous solution into a toluene solution of 2-Hydroxy-4-n-octyloxybenzophenone Oxime (HOBO), which serves as a chelating agent that selectively binds to Cu-64 metal [78]. …”

Section: Resultsmentioning

confidence: 99%

Thiolene and SIFEL-based microfluidic platforms for liquid–liquid extraction

Goyal

Desai

Lewis

et al. 2014

Sensors and Actuators B: Chemical

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Microfluidic platforms provide several advantages for liquid-liquid extraction (LLE) processes over conventional methods, for example with respect to lower consumption of solvents and enhanced extraction efficiencies due to the inherent shorter diffusional distances. Here, we report the development of polymer-based parallel-flow microfluidic platforms for LLE. To date, parallel-flow microfluidic platforms have predominantly been made out of silicon or glass due to their compatibility with most organic solvents used for LLE. Fabrication of silicon and glass-based LLE platforms typically requires extensive use of photolithography, plasma or laser-based etching, high temperature (anodic) bonding, and/or wet etching with KOH or HF solutions. In contrast, polymeric microfluidic platforms can be fabricated using less involved processes, typically photolithography in combination with replica molding, hot embossing, and/or bonding at much lower temperatures. Here we report the fabrication and testing of microfluidic LLE platforms comprised of thiolene or a perfluoropolyether-based material, SIFEL, where the choice of materials was mainly guided by the need for solvent compatibility and fabrication amenability. Suitable designs for polymer-based LLE platforms that maximize extraction efficiencies within the constraints of the fabrication methods and feasible operational conditions were obtained using analytical modeling. To optimize the performance of the polymer-based LLE platforms, we systematically studied the effect of surface functionalization and of microstructures on the stability of the liquid-liquid interface and on the ability to separate the phases. As demonstrative examples, we report (i) a thiolene-based platform to determine the lipophilicity of caffeine, and (ii) a SIFEL-based platform to extract radioactive copper from an acidic aqueous solution.

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“…The mass balance for RN under the experimental conditions in this study is represented by the following equation: (12) From Eqs. (9)- (12), the distribution ratio is shown as follows: (13) where …”

Section: Fig6 Effect Of the Hydrogen Ion Concentration On The Distrimentioning

confidence: 99%

Synthesis of <i>N</i>-2-Ethylhexylurea and Its Selective Extraction Equilibria of Palladium(II) and Gold(III)

Baba

Kanai

Kanemaru

et al. 2010

SERDJ

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N-2-Ethylhexylurea (EHU) was synthesized to develop a selective extractant for precious metals over base metals and to separate individual precious metals.The extraction selectivity for precious metals from hydrochloric acid was investigated using EHU in chloroform at 303 K. EHU exhibited a high selectivity for gold(III) and palladium(II) over base metals such as copper(II), mercury(II), nickel(II), cadmium(II), zinc(II), cobalt(II) and iron(III).Furthermore, gold(III) was extracted selectively over palladium(II) at high hydrochloric acid concentrations. In order to understand the high selectivity, the extraction equilibria of palladium(II) and gold(III) were quantitatively studied by examining the concentration dependence of chloride and hydrogen ions on the extraction equilibria. Stripping of palladium(II) and gold(III) were performed by a single contact batch method using 1 mol dm -3 aqueous thiourea solution or 1 mol dm -3 aqueous thiourea solution containing 1 mol dm -3 hydrochloric acid.

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Extraction Mechanism for Copper(II) with 2-Hydroxy-4-n-octyloxybenzophenone Oxime

Cited by 15 publications

References 17 publications

Removal of Arsenic(III) from Aqueous Solution Using Metal Organic Framework-Graphene Oxide Nanocomposite

Removal of Arsenic(III) from Aqueous Solution Using Metal Organic Framework-Graphene Oxide Nanocomposite

Thiolene and SIFEL-based microfluidic platforms for liquid–liquid extraction

Synthesis of <i>N</i>-2-Ethylhexylurea and Its Selective Extraction Equilibria of Palladium(II) and Gold(III)

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