Rhamnolipid based micellar-enhanced ultrafiltration for simultaneous removal of Cd(II) and phenolic compound from wastewater

Verma, Satya Pal; Sarkar, Biswajit

doi:10.1016/j.cej.2017.03.009

Cited by 40 publications

(12 citation statements)

References 24 publications

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“…The impact of an algae in soils contaminated with bisphenols has not been studied so far. The choice of rhamnolipid 90 was dictated by the fact that, on the one hand, Pseudomonas aeruginosa produces rhamnolipid biosurfactants involved in numerous processes including removal of phenols and heavy metals from wastewater (Verma and Sarkar 2017), and on the other hand, metabolic pathways were identified, which are induced by Pseudomonas sp. and which effectively degrade bisphenols (Singh et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Role of Chlorella sp. and rhamnolipid 90 in maintaining homeostasis in soil contaminated with bisphenol A

2020

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Purpose The knowledge about the impact of BPA on soil health does not correspond to the great interest in its analogues. Therefore, a study was conducted to determine the potentially negative impact of BPA on the biochemical properties of soil. The study also evaluated the effectiveness of two biostimulants in eliminating potential homeostasis disorders caused by BPA. Materials and methods A pot experiment was conducted under supervised conditions. BPA at five contamination levels was added to the soil of the granulometric composition of sandy loam at 0, 0.1, 2, 40 and 800 mg BPA kg −1 of a dry matter (DM) of soil. The biochemical activity of the soil was interpreted through the activity of dehydrogenases (Deh), urease (Ure), catalase (Cat), acid phosphatase (Pac), alkaline phosphatase (Pal), arylsulphatase (Aryl) and β-glucosidase (Glu) whose activity was determined on days 5, 15 and 45 of the study. The biostimulative potential of Chlorella sp. and rhamnolipid 90 (which eliminates the undesirable effects of BPA on the parameters) was expressed with IF B-the factor of the impact of increasing of bisphenol (BP) soil contamination levels. The response of spring barley to increasing BPA pressure was analysed with the plant resistance index (RS). The study was made more comprehensive by determination of the macronutrient content in the plants. Results and discussion The sensitivity of individual enzymes to increasing bisphenol pressure on the 45th day of the experiment can be arranged in the following sequence: Deh > Ure > Glu > Pac > Cat > Aryl > Pal. Biostimulation of soil with Chlorella sp. gave better results than with rhamnolipid 90. A compilation of BPA 800 mg BPA kg −1 DM of soil and Chlorella sp. brought about an increase in the activity of Glu on the 45th day of the experiment and Pac, Pal and Aryl on the 5th day. Only at this contamination level did BPA stimulate the crop growth in all the parallel plots except in those biostimulated by Chlorella sp. Only algae significantly reduced the negative BPA impact on the N, Ca and K content in spring barley. Conclusions The experiment emphasised the significant inhibitory impact of BPA on the biochemical activity of soil which, in consequence, upset the microbial balance of soil processes. Chlorella sp. played a more important role in maintaining the soil homeostasis than rhamnolipid 90, which did not correspond to its negative impact on the yield of spring barley.

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Section: Introductionmentioning

confidence: 99%

Role of Chlorella sp. and rhamnolipid 90 in maintaining homeostasis in soil contaminated with bisphenol A

2020

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“…The CMC value was determined from the intersection point of two tangents of the surface tension isotherm (Figure ), which was a plot of equilibrium surface tension versus RHL concentration. The CMC of pure RHL and RHL in presence of Cd +2 and CV were found to be 80 and 60 mg/L. The decrease in CMC value of RHL in presence of Cd +2 and CV could be elucidated by the fact that the charge of the hydrophilic head group (rhamnose moiety) was partially counterbalanced by the CV and Cd +2 molecules present in solution, resulting in decrease in charge density at the RHL vesicle surface.…”

Section: Resultsmentioning

confidence: 96%

“…Very few MEUF studies with biosurfactants have been investigated for separation of organic and inorganic pollutants from aqueous streams . Our previous work has demonstrated the potential of RHL (rhamnolipid) in MEUF for separation of Cd(II) and p‐cresol from aqueous solution . In this study, we report the simultaneous removal of heavy metal ion (Cd +2 ) and organic dye (CV) from aqueous synthetic solution by MEUF with RHL as a glycolipid biosurfactant.…”

Section: Introductionmentioning

confidence: 96%

“…Compared with synthetic surfactants, the low CMC of biosurfactant helps in reducing the inevitable leakage of surfactant monomers with the permeate and lowering the concentration polarization and membrane fouling leading to enhancement in process throughput. Very few MEUF studies with biosurfactants have been investigated for separation of organic and inorganic pollutants from aqueous streams . Our previous work has demonstrated the potential of RHL (rhamnolipid) in MEUF for separation of Cd(II) and p‐cresol from aqueous solution .…”

Section: Introductionmentioning

confidence: 99%

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Use of rhamnolipid in micellar‐enhanced ultrafiltration for simultaneous removal of Cd⁺² and crystal violet from aqueous solution

Verma

Sarkar

2019

Asia-Pacific J Chem Eng

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The application of rhamnolipid (RHL) in micellar‐enhanced ultrafiltration (MEUF) was investigated to remove both cadmium ion (Cd+2) and crystal violet (CV) simultaneously from aqueous solution. The effects of the membrane pore size, feed conditions, and operating conditions on solute removal efficiency and permeate flux were studied. Response surface methodology (RSM) was used to obtain the optimal feed conditions. Eigenvalue analysis was performed to evaluate the nature of optimal condition. Critical micelle concentration and aggregate size of RHL in the presence of Cd+2 and CV were determined. Ultrafiltration data were used to estimate the partition coefficient, distribution coefficient and relative affinity of the pollutants, and loading capacity of RHL vesicles. Compared with chemical surfactants, the use of RHL in MEUF process with larger membrane pore size performed better in terms of process throughput. About (84 ± 1)% of initial RHL was recovered from retentate stream using acid precipitation technique, at the optimal recovery condition obtained through RSM. The experimental results obtained using optimal feed condition and RHL recovery condition matched well with the predicted results. Reclaimed RHL was successfully used two times in MEUF with rejection efficiency of 96.7% for Cd+2 and 97.8% for CV, thus, significantly lower the cost of the MEUF process.

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“…They compared the results with those obtained in the presence of SDS. The experiments gave slightly higher rejections of both Cd(II) and p-Cresol with R values of 99.4 and 23.9, respectively[39].…”

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confidence: 89%

Nanofiltration Mediated by Surfactant Micelles: Micellar- Enhanced Ultrafiltration

Taşcıoğlu¹

2018

Nanofiltration

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Surfactant micelle-assisted removal of ions and organic solutes from aqueous media by micellar enhanced ultrafiltration (MEUF), which is a membrane separation technique, is discussed in detail. Following general information about micellar structure, counterion binding, substrate solubilization, and medium effect functions of micelles which enable separation of cationic or anionic ions and organic molecules from aqueous media by MEUF are explained in a comprehensive manner. Some of the recent studies on removing pollutants from wastewater effluents of industrial plants by MEUF, and their results have been summarized to inform about the factors affecting the removal efficiency of this technique. Methods for recovery of surfactant and contaminants from retentate or permeate solutions are also given. Selective separation of metal ions of the same charge from multicomponent solutions is another topic of this chapter. In this context, the last part of the chapter provides an overview on every aspects of ligand modified MEUF (LM-MEUF) process. This report comprises a comprehensive review of MEUF and LM-MEUF studies in the literature.

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Rhamnolipid based micellar-enhanced ultrafiltration for simultaneous removal of Cd(II) and phenolic compound from wastewater

Cited by 40 publications

References 24 publications

Role of Chlorella sp. and rhamnolipid 90 in maintaining homeostasis in soil contaminated with bisphenol A

Role of Chlorella sp. and rhamnolipid 90 in maintaining homeostasis in soil contaminated with bisphenol A

Use of rhamnolipid in micellar‐enhanced ultrafiltration for simultaneous removal of Cd⁺² and crystal violet from aqueous solution

Nanofiltration Mediated by Surfactant Micelles: Micellar- Enhanced Ultrafiltration

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Rhamnolipid based micellar-enhanced ultrafiltration for simultaneous removal of Cd(II) and phenolic compound from wastewater

Cited by 40 publications

References 24 publications

Role of Chlorella sp. and rhamnolipid 90 in maintaining homeostasis in soil contaminated with bisphenol A

Role of Chlorella sp. and rhamnolipid 90 in maintaining homeostasis in soil contaminated with bisphenol A

Use of rhamnolipid in micellar‐enhanced ultrafiltration for simultaneous removal of Cd+2 and crystal violet from aqueous solution

Nanofiltration Mediated by Surfactant Micelles: Micellar- Enhanced Ultrafiltration

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Use of rhamnolipid in micellar‐enhanced ultrafiltration for simultaneous removal of Cd⁺² and crystal violet from aqueous solution