Thin film composite nanfiltration membranes for extreme conditions

Dalwani, Mayur

doi:10.3990/1.9789036532761

Cited by 4 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The biggest advantage of TFC membranes over integrally skinned asymmetric membranes is that each layer can be tuned independently to obtain a membrane with desired properties and performance. The ultra‐thin top‐layer can be obtained via simple solution casting (like spin coating, dip coating or spray coating) or polymerization (interfacial polymerization (IP), in situ polymerization, plasma polymerization, or grafting) …”

Section: Introductionmentioning

confidence: 99%

Understanding and guiding the phase inversion process for synthesis of solvent resistant nanofiltration membranes

Hołda

Vankelecom

2015

J of Applied Polymer Sci

358

268

View full text Add to dashboard Cite

Since its introduction in membrane technology in the 1960's, phase inversion by means of immersion precipitation has been widely studied for the preparation of membranes to be applied in the fields of microfiltration (MF) and ultrafiltration (UF). However, much less knowledge is available about this process in terms of integrally skinned asymmetric nanofiltration membranes, especially for more hydrophobic polymers applied in solvent resistant nanofiltration (SRNF). This review focuses on the preparation aspects of integrally skinned asymmetric membranes to be applied in the field of SRNF via phase inversion. It starts with the explanation of the basic principles of the phase inversion process, covering both thermodynamic and kinetic aspects. Further, it summarizes the parameters that significantly influence final membrane performance and morphology, including polymer type and concentration, casting solvent, additives, evaporation time, and temperature, humidity, membrane thickness, composition, and temperature of coagulation bath and post-treatment. Literature contained within this review constitutes the core references in the field of SRNF, but also several references on preparation of MF, UF, aqueous NF, and reverse osmosis (RO) membranes have been included to better clarify or illustrate certain aspects of the process.

show abstract

Section: Introductionmentioning

confidence: 99%

Understanding and guiding the phase inversion process for synthesis of solvent resistant nanofiltration membranes

Hołda

Vankelecom

2015

J of Applied Polymer Sci

358

268

View full text Add to dashboard Cite

show abstract

“…Some of the chloride product does not react with amines but is hydrolyzed from the carboxylic group, which causes a thin layer of anionic-charged polyamide at neutral pH (Oreamuno, 2011). It has an isoelectric point at pH 3.2 (Dalwani, 2011).…”

Section: Introductionmentioning

confidence: 99%

Treatment of Coal Mine Acid Water Using Nf270 Membrane as Environmentally Friendly Technology

Kiswanto¹,

Susanto²,

Sudarno³

2020

JPII

View full text Add to dashboard Cite

Ex-mining pond water is widely used for the daily needs of the people these days, such as bathing, washing, and even drinking. Over time, it turns out that coal mine acid water has polluted the environment. The use of membrane technology to produce water that meets drinking water quality standards by the Minister of Health Regulation No. 492 of 2010 can be a solution to this problem. The NF270 membrane is a membrane process between reverse osmosis and ultrafiltration, which has a lower flux and operating pressure below 0.2-1.53 Mpa compared to reverse osmosis. Membrane NF270 is used for the reclamation of wastewater, water purification and softening, seawater desalination, and others. Its high rejection of organic molecules with a molecular weight of 200-2000 Da ions and multivalent can remove suspended solids, natural organic matter, bacteria, viruses, salts, and divalent ions contained in water, including coal mine acid water. The purpose of treating acid mine drainage with the NF270 membrane is to remove COD, TSS, TDS, and Fe metals. The NF270 membrane was used in this study to treat the coal mine acid water of PT. Bukit Asam. The performance of the NF270 process was assessed from the effect of pressure (4, 5, and 6 bar) on the flux and rejection rate of each parameter in a single solution, mixed and aqueous coal mine acid solution. The optimum pressure of the NF270 membrane for all parameters was 6 bar. This optimum pressure was then used to compare the phenomenon of flux that occurred and the level of rejection produced in the original sample of coal mine acid water. In the original coal mine acid water, there was a significant decrease in flux due to fouling deposition on the membrane surface. This phenomenon of decreasing flux was caused by fouling and polarization concentration. The rejection rates produced for the parameters of COD, TSS, TDS, and Fe with NF270 membranes were 56.4-93.1%; 78.5-100%; 43-69.3%; 67-100% respectively. Treated coal mine acid water using NF270 membrane technology can be used as drinking water that meets the standards of the Indonesian Ministry of Health Regulation. Thus, NF270 membrane technology can be used to process coal mine acid water into environmentally friendly drinking water.

show abstract

“…NF membranların üretiminde daldırma (dip-coating), sprey kaplama (spray coating), döndürmeli kaplama (spin coating) gibi kaplama metodlarının yanı sıra; arayüzey, plazma, yerinde (in-situ), çapraz bağlama vb. gibi karışık polimerizasyon ya da aynı anda membran çekme (coextrusion) yöntemleri kullanılmaktadır [2]. Üretilen NF membranlar genellikle iki grupta incelenmektedir.…”

Section: Introductionunclassified

İnce Boşluklu Nanofiltrasyon (NF) Membran Üretimi ve Performans Değerlendirmesi

Ates‐Genceli¹,

Urper²,

Şengür³

et al. 2020

Academic Platform Journal of Engineering and Science

View full text Add to dashboard Cite

İnce boşluklu (hollow fiber (HF)) ultrafiltrasyon (UF) membranların dış yüzeyi, arayüzey polimerizasyon metodu ile ince film kaplanarak, nanofiltrasyon (NF) membranlar üretilmiştir. Farklı monomerlerin ve bekletme sürelerinin membran performansı üzerindeki etkilerinin belirlenebilmesi için üretimde iki farklı monomer, (m-fenilen diamin (MPD) ve piperazin (PIP)) kullanılmış ve açil klorid monomeri için (trimezoil klorid (TMC)) farklı temas süreleri (2 dk, 1 dk ve 30 sn) uygulanmıştır. Üretilen membranların karakteristiği ve performansları SEM görüntüleri, saf su geçirgenlikleri, temas açısı, yüzey pürüzlülüğü, tuz tutunumu (MgSO4 ve NaCl) ve akı verileri incelenerek değerlendirilmiştir. Membranların SEM görüntüleri, tüm üretim koşullarında ince film tabakasının oluştuğunu göstermiştir. Yüzey pürüzlülüğü üzerinde MPD monomerinin, PIP monomerine göre daha etkili olduğu belirlenmiştir. En iyi geçirgenlik değeri TMC için uygulanan bekletme sürelerine bağlı olarak farklılık (PIP için TMC (2 dk), MPD için TMC (1 dk)) göstermiştir. Farklı amin monomerler kullanılarak üretilen membranlar dört farklı basınç altında (3, 6, 9, 12 bar) işletilmiştir. PIP monomeri ile üretilen membranlarda daha yüksek tuz akıları ve giderim verimleri elde edilmiştir. % 50 ve üzerinde MgSO4 giderimi, % 2 PIP, % 0.13 TMC (2 dk ve 1 dk), ve % 2 MPD, % 0.13 TMC (2 dk ve 30 sn) olan membranlarda izlenmiştir. NaCl gideriminde ise en yüksek verim (% 39.6), % 2 MPD, % 0.13 TMC (30 sn) ile üretilen membranlarda elde edilmiştir. Bulgulara göre giderilecek tuz cinsine bağlı olarak uygulanacak NF membranın farklılık gösterdiği sonucuna varılmıştır.

show abstract

Thin film composite nanfiltration membranes for extreme conditions

Cited by 4 publications

References 18 publications

Understanding and guiding the phase inversion process for synthesis of solvent resistant nanofiltration membranes

Understanding and guiding the phase inversion process for synthesis of solvent resistant nanofiltration membranes

Treatment of Coal Mine Acid Water Using Nf270 Membrane as Environmentally Friendly Technology

İnce Boşluklu Nanofiltrasyon (NF) Membran Üretimi ve Performans Değerlendirmesi

Contact Info

Product

Resources

About