Firda Lutfiatul Fitria
Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Jember, Jawa Timur 68121, Indonesia
Ezra Lydia Tarigan
Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Jember, Jawa Timur 68121, Indonesia
Bambang Piluharto
Program Studi Magister Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Jember, Jawa Timur 68121, Indonesia
Intan Har Aselna
Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Jember, Jawa Timur 68121, Indonesia
Cantika Almas Fildzah
Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Jember, Jawa Timur 68121, Indonesia
Keywords: PVA, PVDF, turbidity, ZIF-8
ABSTRACT
The demand for water increases annually, yet the quality of clean water remains a significant issue, particularly regarding turbidity. Turbidity is a critical parameter in the physical quality of water as it indicates the presence of suspended particles. One effective development in water treatment technology is the use of PVDF (Polyvinylidene Fluoride) membranes. PVA (Polyvinyl Alcohol) possesses hydrophilic properties, is tasteless, odorless, has good biocompatibility, strong mechanical strength, and is easily formed into frameworks. However, PVDF is inherently hydrophobic, requiring modification to effectively reduce water turbidity. This study fabricated PVDF/ZIF-8 membranes using the Non-solvent Induced Phase Separation (NIPS) method, followed by a dip-coating process in a PVA solution. The membranes were tested for characterization and turbidity reduction performance. The results showed that the modified membranes performed better than the unmodified ones. SEM-EDX and FTIR characterization of the modified PVDF/ZIF-8/PVA membranes confirmed the presence of C, F, O, and Zn elements. The variation using 0.5% PVA with a 30-minute immersion time was identified as the optimal configuration, achieving a turbidity reduction of 93.23% compared to the control 60.50% reduction. This indicates that the modification of PVDF/ZIF-8 with PVA effectively reduces water turbidity.
