Porous BPPO-based membranes modified by aromatic amine for acid recovery

Khan, Muhammad Imran; Mondal, Abhishek N.; Cheng, Congliang; Pan, Jing; Emmanuel, Kamana; Wu, Liang; Xu, Tongwen

doi:10.1016/j.seppur.2015.11.028

Cited by 44 publications

(59 citation statements)

References 34 publications

(63 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…MDPA-4 membrane has low weight loss and more thermal stability compared to MDPA-3 membrane, and similarly MDPA-3 undergoes less weight loss compared to MDPA-2 and MDPA-1 membranes. In the last stage, the main polymer undergoes degradation above 400 C [54]. Hence, it was observed that thermal stability of prepared membranes was enhanced with increasing MDPA contents as shown in Fig.…”

Section: Thermal Behaviormentioning

confidence: 89%

Preparation and performance evaluation of novel alkaline stable anion exchange membranes

Irfan

Bakangura

Afsar

et al. 2017

Journal of Power Sources

Self Cite

View full text Add to dashboard Cite

Section: Thermal Behaviormentioning

confidence: 89%

Preparation and performance evaluation of novel alkaline stable anion exchange membranes

Irfan

Bakangura

Afsar

et al. 2017

Journal of Power Sources

Self Cite

View full text Add to dashboard Cite

“…The linear expansion ratio (LER) was measured using 2 × 2 cm 2 membrane pieces at 25 °C. The LER is calculated with the following equation [5,13,14,15]:

normalLER = \frac{false(L_{WET} - L_{normalDRY} false)}{L_{DRY}} \times 100 %

…”

Section: Methodsmentioning

confidence: 99%

“…All the experiments were conducted at room 25 °C. The dialysis coefficients U (m/h) can be calculated by using Equation (3) [13,15]:

normalU = \frac{M}{A t Δ C}

…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

BPPO-Based Anion Exchange Membranes for Acid Recovery via Diffusion Dialysis

et al. 2017

View full text Add to dashboard Cite

To reduce the environmental impact of acids present in various industrial wastes, improved and robust anion exchange membranes (AEMs) are highly desired. Moreover, they should exhibit high retention of salts, fast acid permeation and they should be able to operate with low energy input. In this work, AEMs are prepared using a facile solution-casting from brominated poly-(2,6-dimethyl-1,4-phenylene oxide) (BPPO) and increasing amounts of 2-phenylimidazole (PI). Neither quaternary ammonium salts, nor ionic liquids and silica-containing compounds are involved in the synthesis. The prepared membranes showed an ion exchange capacity of 1.1–1.8 mmol/g, a water uptake of 22%–47%, a linear expansion ratio of 1%–6% and a tensile strength of 0.83–10.20 MPa. These membranes have potential for recovering waste acid via diffusion dialysis, as the acid dialysis coefficient (UH) at room temperature for HCl is in the range of 0.006–0.018 m/h while the separation factor (S) is in the range of 16–28, which are higher than commercial DF-120B membranes (UH = 0.004 m/h, S = 24).

show abstract

“…The elementary unit of the membrane stack for DD consists of two compartments separated by a cation exchange membrane (CEM) or anion exchange membrane (AEM). DD is widely used for purification of the metallurgical industry wastes from heavy metals [1,2]; reduction of acidity of these wastes or reuse of inorganic acid solutions [3][4][5]; recovery of halides or phosphates from these wastes [6,7]; purification of high molecular weight compounds from organic and inorganic electrolytes [8] and separation of amino acids and mineral impurities [9], as well as in various medical applications [10][11][12] and for the precise determination of some substances concentrations in solutions of complex composition [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Neutralization Dialysis for Phenylalanine and Mineral Salt Separation. Simple Theory and Experiment

et al. 2019

View full text Add to dashboard Cite

A simple non-steady state mathematical model is proposed for the process of purification of an amino acid solution from mineral salts by the method of neutralization dialysis (ND), carried out in a circulating hydrodynamic mode. The model takes into account the characteristics of membranes (thickness, exchange capacity and electric conductivity) and solution (concentration and components nature) as well as the solution flow rate in dialyzer compartments. In contrast to the known models, the new model considers a local change in the ion concentration in membranes and the adjacent diffusion layers. In addition, the model takes into consideration the ability of the amino acid to enter the protonation/deprotonation reactions. A comparison of the results of simulations with experimental data allows us to conclude that the model adequately describes the ND of a strong electrolyte (NaCl) and amino acid (phenylalanine) mixture solutions in the case where the diffusion ability of amino acids in membranes is much less, than mineral salts. An example shows the application of the model to predict the fluxes of salt ions through ion exchange membranes as well as pH of the desalination solution at a higher than in experiments flow rate of solutions in ND dialyzer compartments.

show abstract

Porous BPPO-based membranes modified by aromatic amine for acid recovery

Cited by 44 publications

References 34 publications

Preparation and performance evaluation of novel alkaline stable anion exchange membranes

Preparation and performance evaluation of novel alkaline stable anion exchange membranes

BPPO-Based Anion Exchange Membranes for Acid Recovery via Diffusion Dialysis

Neutralization Dialysis for Phenylalanine and Mineral Salt Separation. Simple Theory and Experiment

Contact Info

Product

Resources

About