Membrane technologies for the removal of micropollutants in water treatment

Bodzek, M.

doi:10.1016/b978-1-78242-121-4.00015-0

Cited by 19 publications

(76 citation statements)

References 60 publications

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“…Series: Materials Science and Engineering 288 (2018) 012118 doi:10.1088/1757-899X/288/1/012118 molecular size of the substances (up to 200 Da) compared to the UF pore size [11][12][13][14]. Consequently, fouling by humic acid in the membrane structure becomes inevitable that resulted in increased pressure drop across the membrane and flux decline [15,16].…”

Section: ''""mentioning

confidence: 99%

Modified Polysulfone Ultrafiltration Membrane for Humic Acid Removal During Peat Water Treatment

Aryanti

Noviyani

Kurnia

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this research, UF membrane was prepared by blending polysulfone (PSf) in DMAc with the addition of PEG400 and low concentration of acetone as additives. The effect of PSf/PEG400 and polymer/solvent ratio on the performance of PSf membrane was investigated during two hours of peat water filtration. The results showed that the increase of ratio PSF/PEG400 from 1:1 to 1:2.5 improved the membrane hydrophilicity. It was indicated by a decrease of water contact angle from 62 o to 33 o and increased water content in membrane structure from 65 to 74,5%. In addition, the pure water flux also increased up to 200 times. A stable flux is achieved when the ratio PSf/PEG is 1:2 and resulted in 84% rejection of humic acid. The increase of polymer concentration in the membrane solution reduced the pure water flux but increased the rejection of humic acid. Higher polymer concentration in membrane solution reduced fouling tendency towards the membrane surface. It showed that flux decline was reduced from 60% to 40% when the ratio of polymer/solvent concentration was changed from 40/60 to 50/50.

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Section: ''""mentioning

confidence: 99%

Modified Polysulfone Ultrafiltration Membrane for Humic Acid Removal During Peat Water Treatment

Aryanti

Noviyani

Kurnia

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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“…However, large droplets may cause poor stability and extraction efficiency due to the low surface-to-volume ratio. Thus, emulsions with the droplet diameter in the range 0.3-10 µm (preferably 0.8-3 µm) have been suggested considering reasonable ELM stability [16,18]. The effect of emulsification time on ELM stability and removal of copper and cyanide from the external solution by ELMs is shown in Figure 2.…”

Section: Influence Of Mixing For Elm Formationmentioning

confidence: 99%

“…A great number of studies indicated that both extractant and surfactant played important roles in the ELM formation [16,36]. The mobile carrier, LIX 7950, acts as a "shuttle" to carry the target species through ELMs in this case.…”

Section: Influence Of Extractant and Surfactantmentioning

confidence: 99%

“…Besides, using less extractant is always preferred in practice from an economic point view since, in most cases, extractant is usually the most expensive agent among membrane components [36]. [16,[34][35][36]. However, it should be noted that, at a high concentration, surfactant may form emulsions that are stable with a higher emulsion viscosity.…”

Section: Influence Of Extractant and Surfactantmentioning

confidence: 99%

“…Extraction processes using emulsion liquid membrane (ELM) have also received significant attention due to their potential application in treating industrial liquid wastes [16][17][18][19][20]. Use of ELMs for hydrometallurgical recovery of heavy metals from waste industrial solutions has been reported by many investigators and some processes have been successfully commercialized to remove various metals from wastewater in industry [21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Copper and Cyanide Extraction with Emulsion Liquid Membrane with LIX 7950 as the Mobile Carrier: Part 1, Emulsion Stability

Chang

Wang

et al. 2015

Metals

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Abstract:The potential use of emulsion liquid membranes (ELMs) with LIX 7950 as the mobile carrier to remove heavy metals from waste cyanide solutions has been proposed. Relatively stable ELMs with reasonable leakage and swelling can be formed under suitable mixing time and speed during emulsification. The concentration of LIX 7950 and Span 80 in the membrane phase, KOH in the internal phase and the volume ratio of membrane to internal phases are also critical to ELM formation. The efficiency of copper and cyanide removal from dilute cyanide solution by ELMs is related to ELM stability to some extent. More than 90% copper and cyanide can be removed from dilute cyanide solutions by ELMs formed under suitable experimental conditions.

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A comprehensive analysis of membrane fouling in microfiltration of complex linear macromolecules based on theoretical modeling and FESEM images

Heidari

Etemadi

Yegani

2020

J of Chemical Tech & Biotech

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BACKGROUNDMembrane technology is an attractive alternative to conventional water/wastewater treatment technologies as it is sustainable and can be used as an independent process as well as being a part of integrated systems with other treatment technologies. Notwithstanding the abundant benefits that membrane‐based systems offer, their commercial application is overshadowed by the ubiquitous fouling. However, accurate prediction and identification of membrane fouling mechanisms can help to open new doors in recognition of appropriate arrangements for developing more effective membrane synthesis methods and fundamental strategies to achieve better performance, especially in large‐scale production.RESULTSIn this study, three fouling models, namely resistance‐in‐series (RIS), Hermia's and combined cake filtration–pore blockage models, were applied to precisely analyze fouling behavior in dead‐end microfiltration (MF) of collagen solution, as model foulant, using pure high‐density polyethylene and modified high‐density polyethylene membranes. The RIS model was shown to be not representative of the real fouling mechanism in MF membrane units. Similarly, none of the classical models were able to accurately predict fouling in the entire MF process. However, the combined cake–intermediate blockage model provided excellent fits for the membranes.CONCLUSIONSObtained results also demonstrated that physical cleaning was not enough for organic fouling elimination in MF processes. Finally, computational results were validated with experimental observations of collagen rejection and field emission scanning electron microscopy analyses as well. © 2020 Society of Chemical Industry

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Membrane technologies for the removal of micropollutants in water treatment

Cited by 19 publications

References 60 publications

Modified Polysulfone Ultrafiltration Membrane for Humic Acid Removal During Peat Water Treatment

Modified Polysulfone Ultrafiltration Membrane for Humic Acid Removal During Peat Water Treatment

Copper and Cyanide Extraction with Emulsion Liquid Membrane with LIX 7950 as the Mobile Carrier: Part 1, Emulsion Stability

A comprehensive analysis of membrane fouling in microfiltration of complex linear macromolecules based on theoretical modeling and FESEM images

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