Effect of Vacuum UV Irradiation and PVA grafting on thin-film composite RO Membranes

Shalaby, Marwa Saied; Mohamed, Heba Abdallah; Wilken, Ralph; christoph, schmueser; shaban, ahmed; Abuel Aila, Rania Ramadan; Solowski, Gawel

doi:10.21608/ejchem.2023.188560.7484

	Effect of Vacuum UV Irradiation and PVA grafting on thin-film composite RO Membranes
Egyptian Journal of Chemistry
Volume 66, Issue 13, December 2023, Page 781-795 PDF (2.32 MB)
Document Type: Review Articles
DOI: 10.21608/ejchem.2023.188560.7484
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Authors
Marwa Saied Shalaby ¹; Heba Abdallah Mohamed ²; Ralph Wilken³; schmueser christoph³; ahmed shaban ⁴; Rania Ramadan Abuel Aila⁵; Gawel Solowski ⁶
¹Chemical engineering department, Engineering and Renewable Energy Research Institute, National research centre
²Chemical engineering department , Engineering and Renewable energy research Institute, National research centre
³Fraunhofer Institute for Manufacturing Technologies and Advanced Materials (IFAM), Plasma technology and surface treatment, Bremen, Germany
⁴Water pollution research department, National Research center, Dokki, Giza, Egypt
⁵Chemical Engineering Department, National Research Center, Giza Egypt.
⁶Bingol University, Bingol, 1200, Türkiye
Abstract
The surface modifications of thin-film composite (TFC) reverse osmosis membranes were investigated in this study. The development led to simplified technology to produce desalinated water. Another research aim was a comparison of change membrane performances by the presence of zinc nanostructures during the deposition of a PVA/GA chemical layer and by surface activation by vacuum UV (VUV) irradiation. Zn -nanostructures and vacuum irradiation strongly influenced salt rejection, chlorine resistance, and antifouling behavior. VUV-irradiation decreased water contact angle on commercial TFC membranes. VUV treatment with a web speed of 1 m/min extended water contact angle on membranes to reach 8.7°. Those results proved the activation effect of VUV-irradiation on the reverse osmosis membrane and increased hydrophilicity. A decrease in VUV dosage led to an increase in web speed and lowered radiation effect. Zn-nanostructures in the PVA coating layer enhanced the fouling resistance and decreased the contact angle by about 10°, obtaining a flux recovery ratio of about 89%. Vacuum UV irradiation showed a significant impact on RO membrane surface modification. Especially for VUV treatment with a web speed of 10 m/min, it showed dense layer deposition, which increased salt rejection to reach 87% but decreased the membrane productivity.
Keywords
Commercial polyamide membranes; Chlorine resistance; antifouling; vacuum UV irradiation; Desalination


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