Kinetic Characteristics of Reverse-Osmosis Separation of an Aqueous Solution of Aniline in a Flat-Frame Apparatus

Головашин, Владислав Львович; Лазарев, С. И.; Mamontov, V. V.

doi:10.1007/s11167-005-0457-y

Cited by 11 publications

(4 citation statements)

References 4 publications

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“…In order to calculate the membrane efficacy, the membrane retention R and the permeate flux J p were calculated. The parameter R 13 represents the capacity of the membrane to remove the solute from the feed solution, usually water, and is expressed by Eq. 2.…”

Section: Methodsmentioning

confidence: 99%

Influence of Physicochemical Parameters of Organic Solutes on the Retention and Flux in a Nanofiltration Process

et al. 2016

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A comparative study of several organic compounds (atrazine, aniline and phenol, and their derivatives, 4-chlorophenol, 4-nitrophenol and 4-nitroaniline) and their removal from aqueous solutions by nanofiltration using an NF-97 polyamide membrane is presented. The aim was to ascertain any correlation between the physicochemical parameters of the different compounds and the characteristic parameters of the nanofiltration system (permeate flux and rejection coefficient), in order to understand the behavior of the nanofiltration membrane separation processes and any relevant variables. In a previous work, the rejection coefficients and permeate flux values for phenol, 4-chlorophenol, aniline, and atrazine were obtained. These values were used together with the new ones presented for 4-nitroaniline and 4-nitrophenol.

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Section: Methodsmentioning

confidence: 99%

Influence of Physicochemical Parameters of Organic Solutes on the Retention and Flux in a Nanofiltration Process

et al. 2016

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“…The membrane performance was measured in terms of membrane rejection (% R) and permeate flux. For dilute aqueous mixtures consisting of water and a solute, the selectivity of a membrane towards the mixture is usually expressed in terms of the solute rejection coefficient [21]. This parameter, R, is a measure of the membrane ability to separate the solute from the feed solution, and is defined, as percentage, by the equation:…”

Section: Methodsmentioning

confidence: 99%

“…Some of these processes reported for aniline removal include liquid membrane extraction [16][17][18] and pervaporation [19]. Membrane filtration by nanofiltration (NF) [20] and reverse osmosis (RO) [21] has been considered for the removal of organic compounds, including aniline, from water. The main drawback of these methods lies in the low rejection levels attained for many organic molecules, suggesting that the rejection mechanism cannot be explained only by size effects.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Aniline Removal by Reverse Osmosis Using Different Membranes

et al. 2011

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The behavior of different reverse osmosis membranes, namely, HR98PP, SEPA-MS05, and DESAL-3B, was compared with the one predicted by a solution-diffusion model. This model assumes that the membrane has a homogeneous, nonporous surface layer and uses two main parameters, permeate concentration C p and volumetric permeate flux Q p , to characterize the membrane system. In order to calculate these parameters, the theoretical values of water and solute permeability constants, A w and B s , and the osmotic pressure coefficient, W, were initially determined. Using the software Sigma Plot V 10.0, accurate values of W, Q p , and C p were only obtained for the DESAL-3B membrane, i.e., the selected solutiondiffusion model can be applied to this membrane.

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“…It was reported that the waste water containing aniline and phenols can be treated by several techniques, including physical processes (adsorption [ 7 ], membrane separation [ 8 ], extraction), chemical processes (chemical oxidation [ 9 , 10 , 11 ], electrochemical oxidation [ 12 , 13 ], photo-catalyst oxidation [ 14 ]) and biological processes (biodegradation [ 15 ], enzyme catalysis [ 16 ]). However, the high acidity, the high concentration of protonatedaniline and its by-products make it difficult to treat the used solution with biological processes, and it can only be treated with physical or chemical processes, which are high-cost approaches.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Preparation of Polyaniline Nanowires with the Used Electrolyte Solution Treated with the Extraction Process and Their Electrochemical Performance

Wang

et al. 2018

Nanomaterials

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Electrochemical polymerization of aniline is one of the most promising methods to prepare polyaniline (PANI) materials. However, during this process, the electrolyte solution must be replaced after electropolymerization of a certain time because of the generation and the accumulation of the by-products, which have significant effects on the morphology, purity and properties of PANI products. Treatment and recycling of the used electrolyte solution are worthwhile to study to reduce the high treatment cost of the used electrolyte solution containing aniline and its polymerization by-products. Here, the composition of the used electrolyte solution was separated and determined by high performance liquid chromatography coupled with diode array detection (HPLC-DAD) in the range of ultraviolet and visible (UV-Vis) light. The analysis results revealed that the used electrolyte solution consisted of aniline, p-hydroquinone (HQ), p-benzoquinone (BQ), co-oligomers of aniline and p-benzoquinone (CAB) and acid. Then, n-octanol and 2-octanone were selected as extracts to remove HQ, BQ and CAB from the used electrolyte solution. Following that, the recycled electrolyte solution was prepared by adjusting the concentration of aniline and acid of the aqueous phase, and the electrochemical polymerization process was conducted. Finally, the obtained PANI was characterized by scanning electron microscope (SEM) and electrochemical methods. The experimental results clearly demonstrate that the morphology and specific capacitance of PANI produced from the recycled electrolyte solution can be recovered completely. This research paves the way for reusing the used electrolyte solution for aniline electrochemical polymerization.

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Kinetic Characteristics of Reverse-Osmosis Separation of an Aqueous Solution of Aniline in a Flat-Frame Apparatus

Cited by 11 publications

References 4 publications

Influence of Physicochemical Parameters of Organic Solutes on the Retention and Flux in a Nanofiltration Process

Influence of Physicochemical Parameters of Organic Solutes on the Retention and Flux in a Nanofiltration Process

Modeling of Aniline Removal by Reverse Osmosis Using Different Membranes

Electrochemical Preparation of Polyaniline Nanowires with the Used Electrolyte Solution Treated with the Extraction Process and Their Electrochemical Performance

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