Micellar-enhanced ultrafiltration (MEUF) – state of the art

2017 ◽  
Vol 3 (4) ◽  
pp. 598-624 ◽  
Author(s):  
M. Schwarze
Keyword(s):  
Aqueous Solutions ◽  
State Of The Art ◽  
Contaminant Removal ◽  
Operational Parameters ◽  
Micellar Enhanced Ultrafiltration

MEUF is a technique for contaminant removal from aqueous solutions, but its efficiency depends on a variety of operational parameters.

Impacts of Changing Operational Parameters of In Situ Chemical Oxidation (ISCO) on Removal of Aged PAHs from Soil

2012 ◽  
Vol 15 (2) ◽  
Author(s):  
Paula Cajal-Mariñosa ◽  
Ruth G. de la Calle ◽  
F. Javier Rivas ◽  
Tuula Tuhkanen
Keyword(s):  
Hydrogen Peroxide ◽  
Removal Efficiency ◽  
Contaminated Soil ◽  
Chemical Oxidation ◽  
Contaminant Removal ◽  
Operational Parameters ◽  
In Situ Chemical Oxidation ◽  
Different Types ◽  
Wood Impregnation

AbstractThe removal efficiency of two different types of peroxide addition, catalyzed hydrogen peroxide (CHP) and sodium percarbonate (SPC) were compared on a highly PAH-contaminated soil from a wood impregnation site. In an attempt to simulate real in situ reagents delivery, experiments have been carried out in acrylic columns. The main parameters affecting contaminant removal were the reagent’s temperature and the total addition of peroxide (g

Quantitative removal of uranyl ions from aqueous solutions using micellar-enhanced ultrafiltration

1992 ◽  
Vol 264 (2) ◽  
pp. 303-310 ◽  
Author(s):  
Edmondo Pramauro ◽  
Alessandra Bianco Prevot ◽  
Ezio Pelizzetti ◽  
Rosangela Marchelli ◽  
Arnaldo Dossena ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Uranyl Ions ◽  
Micellar Enhanced Ultrafiltration

scholarly journals Removal of anthracene from aqueous solutions using modified magnetic Fe3O4 nanoparticles by dendrimer polymer chains and 4-aminophenol Ligandide

2020 ◽  
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Process ◽  
Polymer Chains ◽  
Isotherm Models ◽  
Operational Parameters ◽  
X Ray Diffraction ◽  
Residual Concentration ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
The Fourier Transform

Background: Anthracene is an organic compound and environmentally resistant pollutant that causes severe damage to human health due to toxic and carcinogenic properties. The present study aimed to investigate the efficiency of magnetic dendrimer nano-adsorbent for the removal of anthracene from aqueous solutions. Methods: In this study, the synthesized iron oxide nanoparticles were modified by dendrimer polymer chains and 4-aminophenol ligand. The Fourier-transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy were conducted to examine the nano-absorbent properties. Different operational parameters in the adsorption process in batch and laboratory conditions were also studied, and the adsorbent reusability was correspondingly examined in this study. The residual concentration of anthracene in aqueous solution was determined and reported by a spectrophotometer. Findings: Optimization results showed that the maximum adsorbent capacity under optimum conditions (pH=7, 20 mg/L anthracene concentration, 0.5 g/L adsorbent dosage, and 30 min contact time) was equal to 83 mg/g. The experimental data fitted with different isotherm models showed that the equilibrium data were well described by the Langmuir model. In this study, the adsorption process overlapped more with the pseudo-second-order kinetics model. Conclusion: The obtained results indicated that the synthesized nanostructured adsorbent has a high adsorption capacity with high recovery and is efficient enough to remove anthracene from aqueous solutions.

Arsenic–nucleotides interactions: an experimental and computational investigation

2020 ◽  
Vol 49 (19) ◽  
pp. 6302-6311 ◽  
Author(s):  
Giuseppe Cassone ◽  
Donatella Chillè ◽  
Viviana Mollica Nardo ◽  
Ottavia Giuffrè ◽  
Rosina Celeste Ponterio ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
State Of The Art ◽  
Computational Investigation ◽  
Computational Approaches

By means of state-of-the-art computational approaches and experiments we characterize the chelation process established by As(iii) with AMP, ADP, and ATP in aqueous solutions.

scholarly journals Removal of Phosphate Ions from Aqueous Solutions by Adsorption onto Leftover Coal

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1381
Author(s):  
Dereje Tadesse Mekonnen ◽  
Esayas Alemayehu ◽  
Bernd Lennartz
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Aqueous Media ◽  
Effect Of Temperature ◽  
Phosphate Adsorption ◽  
Operational Parameters ◽  
Solution Ph ◽  
Retention Efficiency ◽  
Set Up

High loadings of wastewater with phosphors (P) require purification measures, which can be challenging to realize in regions where the technical and financial frame does not allow sophisticated applications. Simple percolation devices employing various kinds of adsorbents might be an alternative. Here, we investigated the application of leftover coal, which was collected from Ethiopian coal mining areas, as an adsorbent for the removal of phosphate from aqueous solutions in a classical slurry batch set-up. The combined effects of operational parameters such as contact time, initial concentration, and solution pH on P retention efficiency was studied employing the Response Surface Methodology (RSM). The maximum phosphate adsorption (79% removal and 198 mg kg−1 leftover coal) was obtained at a contact time of 200 min, an initial phosphate concentration of 5 mg/L, and a solution pH of 2.3. The Freundlich isotherm was fitted to the experimental data. The pseudo second-order equation describes the experimental data well, with a correlation value of R2 = 0.99. The effect of temperature on the adsorption reveals that the process is exothermic. The results demonstrate that leftover coal material could potentially be applied for the removal of phosphate from aqueous media, but additional testing in a flow-through set-up using real wastewater is required to draw definite conclusions.

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