Investigation of cobalt(II) retention from aqueous solutions by a polyamide nanofiltration membrane

Gherasim, Cristina-Veronica; Hancková, Kristýna; Palarčík, Jiří; Mikulášek, Petr

doi:10.1016/j.memsci.2015.04.051

Cited by 50 publications

(12 citation statements)

References 48 publications

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“…As a result, the ions rejection remained constant when increasing the applied pressure. This result agrees with the literature findings that indicate that the two phenomena (the solvent flux and concentration polarization) have opposite effects on the ions rejection [ 51 , 52 ].…”

Section: Resultssupporting

confidence: 93%

Application of NF Polymeric Membranes for Removal of Multicomponent Heat-Stable Salts (HSS) Ions from Methyl Diethanolamine (MDEA) Solutions

et al. 2020

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This study presents an efficient and scalable process for removing the heat-stable salts (HSS) ions from amine solution while recovering methyl diethanolamine (MDEA) solution for its reuse in gas sweetening plants. The presence of HSS in the amine solution causes the loss of solvent capacity, foaming, fouling, and corrosion in gas sweetening units so their removal is crucial for a more well-performing process. Furthermore, the recovery of the amine solution can make the sweetening step a more sustainable process. In this study, for the first time, the removal of a multicomponent mixture of HSS from MDEA solution was investigated via a nanofiltration process using flat-sheet NF-3 membranes. The impact of operating parameters on salts and amine rejection, and flux, including the operating pressure, HSS ions concentration, and MDEA concentration in the feed solution was investigated. Results based on the nanofiltration of an amine stream with the same composition (45 wt.% MDEA solution) as that circulating in a local gas refinery (Ilam Gas refinery), demonstrated a removal efficiency of HSS ions in the range from 75 to 80% and a MDEA rejection of 0% indicating the possibility of reusing this stream in the new step of gas sweetening.

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Section: Resultssupporting

confidence: 93%

Application of NF Polymeric Membranes for Removal of Multicomponent Heat-Stable Salts (HSS) Ions from Methyl Diethanolamine (MDEA) Solutions

et al. 2020

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“…Since the PAH/PSS films assembled in this paper are terminated by a cationic PAH film, the surface of the modified film is positive, thus leading to repulsive interactions between the modified membrane and the metal cations. Such mechanism was also observed by Gherasim et al who studied the retention of cobalt ions by an organic tubular membrane [11]. In addition, we have already shown in previous studies that: (i) the retention of copper ions by a polymer-based modified membrane increases when the charge of the polycation increases and/or the charge of the polyanion decreases, thus indicating a strong influence of the polymer film's charge [17]; and (ii) the retention rate of a polymer-modified membrane is far higher when the multilayer film is terminated by a polycation layer than when it is terminated by a polyanion layer [18].…”

Section: Discussionsupporting

confidence: 70%

“…Concerning nanofiltration, this technique has attractive advantages such as high separation efficiency, easy operation, and easy to scale up [9,10]. However, nanofiltration suffers from its high energy consumption and cost due to the need to perform the filtration of metal ions at high operating pressure (10-30 bars) [11,12].…”

Section: Introductionmentioning

confidence: 99%

Use of Modified Colloids and Membranes to Remove Metal Ions from Contaminated Solutions

Mokhter

Magnenet

Lakard

et al. 2018

Colloids and Interfaces

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An efficient process was developed allowing the removal of metal ions from polycontaminated aqueous solutions by combining modified colloids and membranes. Firstly, filtration experiments were performed using polyethersulfone membranes modified by a self-assembled multilayer film of polyelectrolytes. These polymer-modified membranes allowed the uptake of more than 90% of the metal ions initially present in the contaminated solutions (for solutions concentrated at 50 mg L −1). Secondly, adsorption experiments were carried out with colloidal silica encapsulated with carboxymethyl chitosan (SiO 2-CMCS) or with mesoporous silica functionalized by grafting of 1,4,8,11-tetraazacyclotetradecane, i.e., cyclam (SiO 2-cyclam). The adsorption capacity of these compounds was shown to be higher than numerous other literature-known adsorbents, reaching 68 and 61 mg g −1 towards Cu(II) for SiO 2-CMCS and SiO 2-cyclam, respectively. Finally, by coupling adsorption with ultrafiltration in the tangential mode, the removal of Cu(II), Ni(II) and Zn(II) ions was found to be improved, allowing to reach a removal efficiency of 99% towards Cu(II), Ni(II) and Zn(II) ions at a metal concentration of 50 mg L −1 , and a promising removal efficiency around 70% at a very high metal concentration of 1200 mg L −1. The mechanisms involved in the capture of the metal ions by modified membranes and colloids are also discussed.

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“…According to the World Health Organization guidelines, the permissible concentration of cadmium in drinking water is < 0.005 mg L −1 [6]. Different methods were used for removal of heavy metals from wastewaters include ion-exchange, chemical precipitation, reverse osmosis, evaporation, membrane filtration, adsorption, and biosorption [7][8][9][10][11][12][13]. However, there are some disadvantages in these methods such as incomplete metal removal, complex procedure, high cost and low efficiency.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of CNTs/MnO₂ composite for adsorption of ⁶⁰Co(II), ⁶⁵Zn(II) and Cd(II) ions from aqueous solutions

et al. 2016

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CNTs/MnO 2 composite was synthesized by a coprecipitation method after preparation of carbon nanotubes (CNTs) using a chemical oxidation method and was characterized using Fourier transformer infrared (FT-IR), X-ray diffraction (XRD) and scanning electron microscope (SEM). The synthesized CNTs/MnO 2 composite was used as a sorbent for the removal of some radionuclides ( 60 Co and 65 Zn-radioisotopes) and Cd (II) ions from aqueous solutions. Different parameters affecting the removal process including pH, contact time and metal ion concentration were investigated. Isotherm and kinetic models were studied. Adsorption data was interpreted in terms of both Freundlich and Langmuir isotherms and indicated that the CNTs/MnO 2 composite complied well with both Langmuir and Freundlich models for Zn and Cd(II) ions from loaded samples was studied using different eluents.

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Investigation of cobalt(II) retention from aqueous solutions by a polyamide nanofiltration membrane

Cited by 50 publications

References 48 publications

Application of NF Polymeric Membranes for Removal of Multicomponent Heat-Stable Salts (HSS) Ions from Methyl Diethanolamine (MDEA) Solutions

Application of NF Polymeric Membranes for Removal of Multicomponent Heat-Stable Salts (HSS) Ions from Methyl Diethanolamine (MDEA) Solutions

Use of Modified Colloids and Membranes to Remove Metal Ions from Contaminated Solutions

Evaluation of CNTs/MnO₂ composite for adsorption of ⁶⁰Co(II), ⁶⁵Zn(II) and Cd(II) ions from aqueous solutions

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Investigation of cobalt(II) retention from aqueous solutions by a polyamide nanofiltration membrane

Cited by 50 publications

References 48 publications

Application of NF Polymeric Membranes for Removal of Multicomponent Heat-Stable Salts (HSS) Ions from Methyl Diethanolamine (MDEA) Solutions

Application of NF Polymeric Membranes for Removal of Multicomponent Heat-Stable Salts (HSS) Ions from Methyl Diethanolamine (MDEA) Solutions

Use of Modified Colloids and Membranes to Remove Metal Ions from Contaminated Solutions

Evaluation of CNTs/MnO2 composite for adsorption of 60Co(II), 65Zn(II) and Cd(II) ions from aqueous solutions

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Evaluation of CNTs/MnO₂ composite for adsorption of ⁶⁰Co(II), ⁶⁵Zn(II) and Cd(II) ions from aqueous solutions