Esra Ateş GENCELİ, Gülsüm Melike Ürper BAYRAM, Reyhan ŞENGÜR TAŞDEMİR, Türker TÜRKEN, İSMAİL KOYUNCU

Arayüzey Polimerizasyonu Metodu ile İnce Boşluklu Nanofiltrasyon (NF) Membran Üretimi ve Performans Değerlendirmesi

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.

Fabrication of Hollow Fiber Nanofiltration Membrane by Interfacial Polymerization Method and Performance Evaluation

The outer surfaces of the hollow fiber (HF) ultrafiltration (UF) membranes were coated by the interface polymerization method and nanofiltration (NF) membranes were produced. For the determination of different monomers and contact time effects on the membrane performance, two different monomers, (m-phenylene diamine (MPD) and piperazine (PIP)) and different contact time (2 min, 1 min and 30 sec) to the acyl chloride monomer (trimezoyl chloride (TMC)) were applied in the fabrication of membrane. The characterization and performance evaluation of the produced membranes were investigated with SEM images, pure water permeability, contact angle, surface roughness, salt retention (MgSO4 and NaCl) and flux data. SEM images of the membranes showed that a thin film layer formed in all production conditions. It was determined that MPD monomer is more effective than PIP monomer on surface roughness. The best permeability value showed variation depending on the applied contact time for TMC. Produced membranes by using different amine monomers were operated under four different pressures (3, 6, 9, 12 bar). Higher salt fluxes and removal efficiencies for MgSO4 were obtained in membranes produced with PIP. 50% and above of MgSO4 removal was observed in membranes with 2% PIP, 0.13% TMC (2 min and 1 min), and 2% MPD, 0.13% TMC (2 min and 30 sec). The highest NaCl removal efficiency (39.6%) was obtained in membranes produced with 2% MPD, 0.13% TMC (30 sec). According to the findings, it was concluded that the NF membrane to be applied differs depending on the type of salt to be removed.

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