Analysis of flux decline during rhamnolipid based micellar-enhanced ultrafiltration for simultaneous removal of Cd+2 and crystal violet from aqueous solution

Verma, Satya Pal; Sarkar, Biswajit

doi:10.1016/j.jwpe.2019.101048

Cited by 19 publications

(7 citation statements)

References 47 publications

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“…Other research innovations in UF include rotating disk ultrafiltration wherein the circular cut out membrane rotates or disks mounted on a shaft rotate at the surface of the membrane to remove any solute accretion (Brou et al, 2002). Experiments have demonstrated that this technology potentially reduces flux decline, as well as augments, permeate flow rates (Verma & Sarkar, 2020). Even simpler systems where the membrane module is subjected to vibrating/gyratory motions have shown to decrease the propensity of fouling and/or concentration polarization (Kaner et al, 2017).…”

Section: Remedial Measures To Overcome the Operational Difficultiesmentioning

confidence: 99%

MEUF for removal and recovery of valuable organic components present in effluents: A process intensified technology

Das

Sharma

Singh

et al. 2022

Water Environment Research

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In recent years, the domain of the research space in novel separation process has been led by membrane systems as a panacea providing multifarious benefits of high separation efficiency, elimination of extreme process conditions, sustainability, and environment friendliness coupled with high operational flexibility. In this niche area, often, ultrafiltration is touted as a robust separation technique due to its high separation efficiency, membrane stability, and lower operating costs. The only drawback of relatively large pore size can be overcome by combining surfactant addition, leading to development of integrated processes termed as Micellar Enhanced Ultrafiltration. MEUF processes isolate and selectively separate valuable organics present in effluent streams.The process characteristics fit the bill as a typified example for process intensification Technology interventions for recycling of surfactants can enhance the cost-competitiveness of the process. This has the potential to develop into a broad-spectrum effluent treatment option with a change of surfactants for target contaminants. Here, in this review, we attempt to critically examine the unique features of this technology, development of spin-offs with wide-ranging applications. Specifically applications in removal of hazardous, and persistent components like dissolved organics have been critically studied. The focus was to highlight the crux of the novel technologies highlighting the efficacy and the underlying concept of process intensification. Practitioner Points• Role of MEUF as a sustainable process intensifying separation technique for removal and recovery of organics.• Novel process development using MEUF.• Comparative performance analysis to assess efficacy.• Discussions on future integrative process development.• Sustainability aspect of MEUF with possibility of byproduct recovery.

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Section: Remedial Measures To Overcome the Operational Difficultiesmentioning

confidence: 99%

MEUF for removal and recovery of valuable organic components present in effluents: A process intensified technology

Das

Sharma

Singh

et al. 2022

Water Environment Research

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Section: Introductionmentioning

confidence: 99%

“…[14] Cu, Ni, Co, Pb, Cr, and Zn also have been removed at percentages above 80% with this surfactant. [8,13,15,16] Biosurfactants such as rhamnolipid remove Cd +2 with 98% efficiency [17] and Cr +6 with 98.7% efficiency [18] in single wastewater mixtures. Other biosurfactants like saponin, which is inexpensive, have been used in MEUF for the removal of methyl violet, and a combination of rhamnolipid and saponin enhances the removal of Cu, Zn, Cr, Pb, Ni, and Mn from sludge due to their binding characteristics with these ions.…”

mentioning

confidence: 99%

“…These biosurfactants above CMC create micelles that complex with metal ions and other pollutants. [17,21] Moreover, biosurfactants have advantages like biodegradability, low CMC, and high efficiency in complexation with ions. [22][23][24] In this study, the removal of heavy metals from synthetic desalter effluent using rhamnolipid in the MEUF process is investigated, and various parameters that impact the efficiency of removal are reported.…”

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confidence: 99%

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

Munoz‐Cupa

Bassi

Liu³

2022

Can J Chem Eng

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The removal of heavy metals from desalter effluent is an important issue due to the toxicity of these pollutants. In this study, micellar-enhanced ultrafiltration (MEUF) is applied for the removal of heavy metals from synthetic desalter effluent. MEUF is a process in which surfactants above their critical micellar concentration (CMC) form micelles. Micelles bind compounds with low molecular weight; then, these are rejected by a semi-permeable membrane.Rhamnolipid is an anionic biosurfactant that has advantages such as biodegradability and low CMC. Rhamnolipid complexation with synthetic desalter effluent demonstrates high efficiency for heavy metal removal. The highest overall removal efficiency was reached at a rhamnolipid concentration of 300 mg/L with 94.07%, 81.93%, 99.81%, 76.00%, and 41.91% for Zn +2 , Mg +2 , Cu +2 , Mn +2 , and Na + , respectively. Additionally, loading capacity on rhamnolipid micelles was evaluated to have better selectivity for Mn +2-

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“…A range of conventional techniques including adsorption, precipitation, membrane separation, solvent extraction, reverse osmosis, adsorptive ultrafiltration (UF), electrochemical, and ion exchange are being employed for the treatment of wastewater [6][7][8][9]. Environmentally compatible surfactant based approaches have received great attention for removal of pollutants from different mediums because of their ecosustainability, high pollutant-removal efficiency, versatility, and work based on "green chemistry" principles [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Surfactants-based remediation as an effective approach for removal of environmental pollutants—A review

Rasheed

Shafi

Bilal

et al. 2020

Journal of Molecular Liquids

150

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Analysis of flux decline during rhamnolipid based micellar-enhanced ultrafiltration for simultaneous removal of Cd+2 and crystal violet from aqueous solution

Cited by 19 publications

References 47 publications

MEUF for removal and recovery of valuable organic components present in effluents: A process intensified technology

MEUF for removal and recovery of valuable organic components present in effluents: A process intensified technology

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

Surfactants-based remediation as an effective approach for removal of environmental pollutants—A review

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