Membrane oriented processes for elimination and recovery of Cr(VI) and Cr(III) through a grafted polymer membrane

Mourtah, I.; Touarssi, Imane; Chaouqi, Y.; Sefiani, N.; Lebrun, Laurent; Hlaı̈bi, Miloudi

doi:10.1016/j.matpr.2019.04.069

Cited by 7 publications

(3 citation statements)

References 19 publications

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“…According to several previous studies published by our research group, − the kinetic and thermodynamic models (SM: 1, 2, and 3) allowed establishing the functions represented by eqs and . The values of P , J 0 , K ass , and D* could be calculated using eqs and where a is the slope of the straight line −ln ( C 0 – 2 C r ) = f ( t ), l is the membrane thickness, S is the active area of the membrane, and V is the receiving phase volume.…”

Section: Methodsmentioning

confidence: 99%

Polymer Inclusion Membranes for Selective Extraction and Recovery of Hexavalent Chromium Ions from Mixtures Containing Industrial Blue P3R Dye

Chaouqi

Ouchn

Touarssi³

et al. 2019

Ind. Eng. Chem. Res.

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The processes for the extraction and removal of Cr(VI) ions using the polymer inclusion membranes (PIMs) that contained nitrilotriacetic acid (NTA) or tris(2-aminoethyl)amine (TAM) as the extractive agent were reported in this study. Each PIM was prepared and characterized using SEM and FTIR techniques to understand the correlation between its structure (morphology and composition) and its performance. The effects of several factors were studied. The parameters permeability, P, initial flux, J 0 , association constant, K ass , apparent diffusion coefficient, D*, and activation parameters (energy, E a , enthalpy, ΔH ‡ , and entropy, ΔS ‡ ) were determined and quantified using the kinetic and thermodynamic models. Therefore, we can affirm that the mechanisms of these oriented processes are governed kinetically rather than energetically. The extractive agent TAM (P = 35.26 × 10 −7 cm 2 •s −1 , D* = 11.5326 × 10 −5 cm 2 •s −1 , E a = 6.03 kJ mol −1 , and ΔH ‡ = 3.53 kJ mol −1 ) was determined to be better for the selective extraction process of Cr(VI) ions in comparison to its counterpart NTA (P = 22.49 × 10 −7 cm 2 •s −1 , D* = 9.58 × 10 −5 cm 2 •s −1 , E a = 7.12 kJ mol −1 , and ΔH ‡ = 7.12 kJ mol −1 ). Therefore, the membranes developed using the TAM agent were adopted further to conduct experiments related to the processes of selective extraction and removal of Cr(VI) ions from the mixtures containing industrial P3R dye. The results of these experiments were conclusive and indicated a total and selective separation of the Cr(VI) ions and the P3R dyes with the observance of a clear improvement in the P, J 0 , and D* parameters and better membrane performance.

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Section: Methodsmentioning

confidence: 99%

Polymer Inclusion Membranes for Selective Extraction and Recovery of Hexavalent Chromium Ions from Mixtures Containing Industrial Blue P3R Dye

Chaouqi

Ouchn

Touarssi³

et al. 2019

Ind. Eng. Chem. Res.

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“…Various studies on diffusion processes of substrates through PIMs have suggested the formation of unstable intermediate entities [H 2 O-IL] # through the interaction between substrate molecules (H 2 O) and extractive agent sites (ILs). 93,[96][97][98][99] The data in Table 4 indicate that the incorporation of the TBAPF 6 IL agent in the membrane phase favored the diffusion of water vapor. Analysis of previous results revealed low values for activation energies (E a and ΔH ≠ ), confirming the observed performances of the developed membranes.…”

Section: Mechanism Of Water Vapor Diffusion Through the Membranementioning

confidence: 99%

Reliable and efficient membrane processes for clean and sustainable production of fresh water from saline waste

Ouchn,

Chaouqi,

Avci

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDIncreasing water scarcity due to growing demand highlights the urgency for innovative solutions. Seawater desalination is emerging as a crucial answer, with direct contact membrane distillation (DCMD) emerging as a promising technology in this context. In particular, membranes produced from ionic liquids constitute a well‐established avenue for the preparation of membranes by non‐solvent phase inversion (NIPS) in the field of desalination.RESULTSThe tests carried out as part of the DCMD, using PVDF membranes modified with the IL MPF6 and TBAPF6 synthesized during this study, in particular those containing 50% TBAFP6, demonstrate a notable improvement in hydrophobicity and porosity (121,48°, 79%). The results suggest that the flux of the PVDF‐TBAPF6 membrane shows a clear improvement of 300% compared to the support alone. Various parameters such as salinity, temperature and flow rate were examined, highlighting their impact on membrane performance. The low energy parameters (Ea = 43,36 Kj/mol, ΔH≠ = 40,86 Kj/mol) indicate a diffusion mechanism of vapor molecules, occurring by successive jumps through the IL interaction sites.CONCLUSIONExtensive experimental investigations have carefully anticipated the permeate flow in DCMD, aiming to efficiently extract pure water. DCMD is positioned as a promising technology for desalination and treatment of BRINE solutions. Therefore, this study can make a significant contribution to the expansion of DCMD by facilitating the prediction and optimization of operational parameters, thereby paving the way for expanded application of this technology.This article is protected by copyright. All rights reserved.

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“…Acute exposure to this product will cause skin irritation and permanent eye damage, rapid or difficult breathing [4] and increased heart rate by inhalation [5], irritation of the gastrointestinal tract [6], nausea, profuse sweating, mental confusion, cyanosis and necrosis of human tissues by digestion [4,5]. Membrane separation process is an effective way for the extraction and recovery of methylene blue from wastewater produced by the textile industry (low energy consumption and use of simple efficiency techniques) [7].…”

Section: Introductionmentioning

confidence: 99%

Activated Carbon to Improve the Performance of Membrane Processes for the Extraction and Elimination of Methylene Blue Pollutant

Hlaı̈bi¹

2022

TTEFT

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In the last few years, membrane technologies have experienced a considerable growth, due to their numerous uses and their advantages over other conventional techniques. The membrane processes present today an important research topic, especially affinity polymer membranes, very adapted to oriented processes. Methylene blue is one of the most widely used dyes in various fields such as chemistry, medicine, dentistry and the dye industry. Our objective is to develop a polymeric inclusion membrane for methylene blue extraction and recovery processes, assisted by activated carbon. We developed a membrane based on a mixed polymer support, polyvinylidene fluoride (PVDF), polyvinylpyrrolidone (PVP), and the amphiphilic molecule Tween 20 (TW20) as extractive agent (EA). In order to quantify the performance of developed membrane, macroscopic parameters such as initial flux J 0 , and permeability P, as well as microscopic parameters such as association constant K ass , and diffusion apparent coefficient D*, were determined. Then, we determined the activation parameters, energy (E a ), enthalpy (ΔH # ass ), and entropy (ΔS # ). Finally, we studied the effect of activated carbon on the evolution of processes carried out and the performance of the membrane, and we observe a very clear improvement. The obtained results indicate that the membrane developed for the studied processes has a real potential for the techniques of separation and pre concentration.

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Membrane oriented processes for elimination and recovery of Cr(VI) and Cr(III) through a grafted polymer membrane

Cited by 7 publications

References 19 publications

Polymer Inclusion Membranes for Selective Extraction and Recovery of Hexavalent Chromium Ions from Mixtures Containing Industrial Blue P3R Dye

Polymer Inclusion Membranes for Selective Extraction and Recovery of Hexavalent Chromium Ions from Mixtures Containing Industrial Blue P3R Dye

Reliable and efficient membrane processes for clean and sustainable production of fresh water from saline waste

Activated Carbon to Improve the Performance of Membrane Processes for the Extraction and Elimination of Methylene Blue Pollutant

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