Solvent extraction of La(III) with 2-ethylhexyl phosphoric acid-2-ethylhexyl ester (EHEHPA) by membrane dispersion micro-extractor

Hou, Hailong; Wang, Yundong; Xu, Jianhong; Chen, Biaohua

doi:10.1016/s1002-0721(12)60413-x

Cited by 39 publications

(6 citation statements)

References 14 publications

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“…Liquid-liquid extraction, biological adsorption, as well as electric reduction have recently been developed and applied in this area to address the separation and recovery of REE from wastewater. [48][49][50] One of the most promising approach to improve recovery of REEs from wastewater is liquid-liquid extraction, whereby highly hydrophobic extractants are used to separate REE metal ions from an aqueous source via the association of REE with the extractants in the oil phase. Separation via solvent extraction, however, often requires multistage process to attain sufficient separation due to high mass transfer resistance and low specific surface area between the two liquid phases.…”

Section: Resultsmentioning

confidence: 99%

Large-Scale Production of Compound Bubbles Using Parallelized Microfluidics for Efficient Extraction of Metal Ions

et al. 2019

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Section: Resultsmentioning

confidence: 99%

Large-Scale Production of Compound Bubbles Using Parallelized Microfluidics for Efficient Extraction of Metal Ions

et al. 2019

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“…potential reserves (Survey, 2014;Ogata et al, 2015). Recently, the adsorption and recovery of REEs from aqueous solutions has become a significant issue owing to their significance (Voßenkaul et al, 2015;Alshameri et al, 2019), and many technologies are being developed to enrich REEs, including solvent extraction (Hou et al, 2013;Schirhagl, 2014), adsorption (Maranescu et al, 2019;Mondal et al, 2019;Yang et al, 2019), ion-exchange (Moldoveanu and Papangelakis, 2012;Page et al, 2019), and coprecipitation (Chatterjee et al, 2009). Among them, adsorption is considered one of the most promising methods for the removal of REEs due to its simple operation, easy separation, high efficiency, and reusability (Ogata et al, 2015;Wang et al, 2017a).…”

Section: Introductionmentioning

confidence: 99%

Preparation of Carboxymethyl Cellulose-g- Poly(acrylamide)/Attapulgite Porous Monolith With an Eco-Friendly Pickering-MIPE Template for Ce(III) and Gd(III) Adsorption

2020

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Due to their high specific surface and metal-binding functional groups in their crosslinked polymeric networks, monolithic materials incorporating a porous structure have been considered one of the most efficient kinds of adsorbents for rare earth element recovery. Herein, a facile and novel monolithic multi-porous carboxymethyl cellulose-g-poly(acrylamide)/attapulgite was synthesized by free radical polymerization via green vegetable oil-in-water Pickering medium internal phase emulsion (O/W Pickering-MIPEs), which was synergically stabilized by attapulgite and tween-20. The homogenizer rotation speed and time were investigated to form stable Pickering-MIPEs. The effects of different types of oil phase on the formation of Pickering-MIPEs were investigated with stability tests and rheological characterization. The structure and composition of the porous material when prepared with eight kinds of vegetable oil were characterized by FTIR and SEM. The results indicate that the obtained materials, which have abundant interconnected porosity, are comparable to those fabricated with Pickering-HIPE templates. The adsorption experiment demonstrated that the prepared materials have a fast capture rate and high adsorption capacities for Ce(III) and Gd(III), respectively. The saturation adsorption capacities for Ce(III) and Gd(III) are 205.48 and 216.73 mg/g, respectively, which can be reached within 30 min. Moreover, the monolithic materials exhibit excellent regeneration ability and reusability. This work provides a feasible and eco-friendly pathway for the construction of a multi-porous adsorbent for adsorption and separation applications.

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“…Also, it has caused an environmental hazard due to the large quantities of organic solvents required [6]. More importantly, the common extraction equipment, such as the mixer-settler, centrifugal extractor and extraction column, have many problems with respect to a long mixing time, low processing capacity, large factory area occupation, high energy consumption and so on [7,8]. Therefore, the next generation of processing devices will need to incorporate reductions in solvent use, and solve the abovementioned issues in the conventional extraction equipment.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, microreactors, which are composed of microchannels fabricated on a microchip platform, have attracted much attention in the fields of analytical chemistry, extraction, and synthesis of chemicals [8][9][10]. Such microreactors, with regards to extracting metal ions, have advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

“…Ciceri et al [22,23] used a microfluidic device to determine the extraction kinetics of Co(II) with DEHPA (di-(2-ethylhexyl) phosphoric acid) extractant, and study the kinetic rate constants using the finite volume numerical simulations. The extraction and separation of rare earths using a microchannel have been conducted using parallel streams of immiscible liquid-liquid phases, as reported by Kubota et al [24], Nishihama et al [25] and Hou et al [8]. Thus it can be seen that microfluidic solvent extraction is a promising option for the hydrometallurgical extraction of metal ions.…”

Section: Introductionmentioning

confidence: 99%

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Solvent extraction of Nd(III) in a Y type microchannel with 2-ethylhexyl phosphoric acid-2-ethylhexyl ester

Zhang¹,

Xie²,

Li³

et al. 2015

Green Processing and Synthesis

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Conventional extraction equipment has many problems like a long mixing time, a large factory area occupation, a large amount of organic solvent consumption and so on. In this paper, a micro solvent extraction system for the extraction of Nd(III) was investigated to solve the above issues. The initial aqueous pH 4.0 and saponification rate 40% of 2-ethylhexyl phosphoric acid-2-ethylhexyl ester (P507) were selected as the optimal experimental conditions. The extraction equilibrium was quickly achieved within 1.5 s, without any mechanical mixing in a narrow channel (100 μm in width and 120 μm in depth) at a volumetric flow rate from 5.55 × 10 -10 m 3 /s to 1.53 × 10 -9 m 3 /s. The extraction behavior of Nd(III) in the microreactor is an interface chemical reaction or the diffusion rate of the Ndcomplex in the organic phase at low pH and [P507], while the extraction rate is controlled by the rate of metal diffusion in the aqueous phase at high pH and [P507], and the apparent mass transfer rate is up to 3.29 × 10 -5 mol/m 2 ·s. The extracted complexes are determined by the infrared (IR) spectrum method, and confirm that the extraction is via a cation exchange mechanism in the microreactor.

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Solvent extraction of La(III) with 2-ethylhexyl phosphoric acid-2-ethylhexyl ester (EHEHPA) by membrane dispersion micro-extractor

Cited by 39 publications

References 14 publications

Large-Scale Production of Compound Bubbles Using Parallelized Microfluidics for Efficient Extraction of Metal Ions

Large-Scale Production of Compound Bubbles Using Parallelized Microfluidics for Efficient Extraction of Metal Ions

Preparation of Carboxymethyl Cellulose-g- Poly(acrylamide)/Attapulgite Porous Monolith With an Eco-Friendly Pickering-MIPE Template for Ce(III) and Gd(III) Adsorption

Solvent extraction of Nd(III) in a Y type microchannel with 2-ethylhexyl phosphoric acid-2-ethylhexyl ester

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