Investigation of micellar‐enhanced ultrafiltration (<scp>MEUF</scp>) using rhamnolipid for heavy metal removal from desalter effluent

Munoz‐Cupa, Carlos; Bassi, Amarjeet; Liu, Lei

doi:10.1002/cjce.24422

Cited by 10 publications

(4 citation statements)

References 35 publications

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“…This work evaluated heavy metals concentration in desalter effluent 36 . The synthetic wastewater was prepared according to the following concentrations: ZnSO 4 ·7H 2 O (13.5 mg/L), MnSO 4 H 2 O (7.5 mg/L), MgSO 4 (415 mg/L), CuSO 4 ·5H 2 O (10.5 mg/L), NaCl (2410 mg/L), and C 6 H 5 OH (354 mM).…”

Section: Methodsmentioning

confidence: 99%

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Investigation of heavy metal removal from salty wastewater and voltage production using Shewanella oneidensisMR‐1 nanowires in a dual‐chamber microbial fuel cell

Munoz‐Cupa

Bassi

2023

Env Prog and Sustain Energy

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Heavy metal removal and simultaneous energy production were studied using a dual chambered Microbial Fuel Cell inoculated with Shewanella oneidensis MR‐1 in the anode. Synthetic wastewater was prepared with Cu (II), Mg (II), Mn (II), Zn (II), Na, and Phenol based on desalter effluent from refinery processes at different metal concentrations. In this study, a maximum open‐circuit voltage of 517.6 mV was reached at Conc. 5 with wastewater in the anode chamber, and 127.7 mV at Conc. 3 was produced with synthetic wastewater in the cathode chamber. Moreover, μ at Conc. 5 was 0.1133 h−1, demonstrating bacterial growth under metal and phenol concentrations. The highest metal removal in the anode for Cu (II), Mg (II), Mn (II), Zn (II), and Na was 93%, 85%, 93%, 88%, and 36%, respectively. In the cathode chamber the removal of Cu (II), Mg (II), Mn (II), Zn (II), and Na was 98%, 49%, 57%, 59%, and 36%, respectively. During the operation in the anode, SEM images showed that the bacterial nanowires are formed in response to toxic and anaerobic environments which contribute to the bacterial growth. These nanowires increased the metal removal and the voltage production as a consequence of a higher electron rate from the anode to the cathode due to the higher extracellular membrane surface area. S. oneidensis is a bacterium with metal‐reducing characteristics, and it is suitable for metal removal and electron transport from carbon sources, demonstrated in voltage production with microbial fuel cells.

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Section: Methodsmentioning

confidence: 99%

“…This work evaluated heavy metals concentration in desalter effluent. 36 The synthetic wastewater was prepared according to the following concentrations: ZnSO…”

Section: Synthetic Wastewater Preparationmentioning

confidence: 99%

Investigation of heavy metal removal from salty wastewater and voltage production using Shewanella oneidensisMR‐1 nanowires in a dual‐chamber microbial fuel cell

Munoz‐Cupa

Bassi

2023

Env Prog and Sustain Energy

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“…[34] RL micelles are able to solubilize lipophilic organic compounds (aliphatic, aromatic hydrocarbons, polycyclic aromatic hydrocarbons). [35][36][37][38][39][40] Foam flotation [41] and micellar ultrafiltration [42] methods use RLs to extract inorganic pollutants Cd and Cr [43][44][45] from aqueous media, including industrial effluents.…”

Section: Introductionmentioning

confidence: 99%

Micellar and solubilizing properties of rhamnolipids

Архипов

Arkhipov

Petrova

et al. 2023

Magnetic Reson in Chemistry

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We studied the micellar and solubilizing properties of aqueous solutions of unfractionated rhamnolipids produced by Pseudomonas aeruginosa. We used nuclear magnetic resonance (NMR) diffusometry, dynamic light scattering, and conductometry to measure the critical micelle concentration (CMC) of rhamnolipid solutions and determined the effective hydrodynamic radii of rhamnolipid monomers and micelles. Based on selective measurements of the self-diffusion coefficients of molecules, performed by NMR diffusometry, the solubilizing properties of rhamnolipids were studied depending on their concentration in solution; aromatic hydrocarbons, benzene, toluene, ethylbenzene, and para-xylene were taken as solubilizates. On the basis of the measurement results, we estimated the distribution coefficient of the solubilizate between the micellar (solubilized) and free (in the aqueous phase) states and the solubilizing capacity of rhamnolipid micelles.

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“…In aqueous solutions, at concentrations C higher than the critical micelle concentration (CMC), rhamnolipids form micelles capable to solubilize organic and inorganic impurities: hydrocarbons, heavy metals, Cd, and Cr . Rhamnolipids are used in soil remediation technologies , after oil and oil product spills and wastewater treatment. , …”

Section: Introductionmentioning

confidence: 99%

Rhamnolipid Biosurfactant: Use for the Removal of Phenol from Aqueous Solutions by Micellar Solubilization

2023

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Selective measurements of the self-diffusion coefficients of molecules of the biological surfactant rhamnolipid (RL) in individual aqueous solutions and in solutions with phenol as a solubilizate were carried out by nuclear magnetic resonance (NMR) diffusometry. Based on the obtained results, the solubilization characteristics of RLs were calculated. They are the fraction of solubilized phenol molecules, the phenol micelle−water distribution coefficient, the molar solubilization coefficient, the hydrodynamic radii of RL monomers and micelles, the aggregation numbers of micelles, and the solubilization capacity of micelles. Fraction of the solubilized phenol molecules increases and approaches 80−90% with increasing RL concentration. The solubilization capacity of the micelles increases from several units to 10 2 with an increase in both the concentration of RLs and the concentration of phenol in solution.

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Investigation of micellar‐enhanced ultrafiltration (MEUF) using rhamnolipid for heavy metal removal from desalter effluent

Cited by 10 publications

References 35 publications

Investigation of heavy metal removal from salty wastewater and voltage production using Shewanella oneidensisMR‐1 nanowires in a dual‐chamber microbial fuel cell

Investigation of heavy metal removal from salty wastewater and voltage production using Shewanella oneidensisMR‐1 nanowires in a dual‐chamber microbial fuel cell

Micellar and solubilizing properties of rhamnolipids

Rhamnolipid Biosurfactant: Use for the Removal of Phenol from Aqueous Solutions by Micellar Solubilization

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