Silica-Pectin Membranes Prepared from Vacuum Impregnation for Wetland Saline Water Pervaporation
نویسندگان
1 Materials and membranes Research Group (M2ReG), Banjarbaru, South Kalimantan 70714, Indonesia
2 Materials and membranes Research Group (M2ReG), Banjarbaru, South Kalimantan 70714, Indonesia
3 Department of Chemistry, Diponegoro University, Semarang 50275, Indonesia
4 Chemical Engineering Department, Engineering Faculty, Lambung Mangkurat University, Jl. A. Yani KM 36 Banjarbaru, South Kalimantan 70714, Indonesia
5 Materials and membranes Research Group (M2ReG), Banjarbaru, South Kalimantan 70714, Indonesia
6 Department of Safety Engineering, Faculty of Engineering and Industrial Technology, Institut Teknologi Kalimantan, Balikpapan, East Kalimantan 76127, Indonesia
7 Materials and membranes Research Group (M2ReG), Banjarbaru, South Kalimantan 70714, Indonesia
8 Materials and membranes Research Group (M2ReG), Banjarbaru, South Kalimantan 70714, Indonesia
9 Materials and membranes Research Group (M2ReG), Banjarbaru, South Kalimantan 70714, Indonesia
10 Materials and membranes Research Group (M2ReG), Banjarbaru, South Kalimantan 70714, Indonesia
doi
10.48309/chemm.2026.563777.2057چکیده
Wetland saline water is an abundant but underutilized resource due to its high salinity, organic content, and variable composition, which make it unsuitable for direct use. Membrane-based desalination presents an effective solution. This study aimed to evaluate the performance of silica-pectin composite membranes fabricated via a vacuum impregnation method for the desalination of wetland saline water, focusing on the effects of the number of membrane layers (1–4) and feed temperature (25–60 °C). Membranes were prepared using a sol-gel process with tetraethyl orthosilicate (TEOS) and 0.5 wt.% banana peel pectin. The active layer was deposited on an α-Al₂O₃ support by vacuum impregnation (2 min, X kPa) and calcined at 300 °C. Performance was tested in a vacuum membrane distillation (VMD) configuration. The four-layer membrane demonstrated optimal performance. For wetland saline water at 60 °C, it achieved a water flux of 9.15 kg/m²·h with 99.56% salt rejection. While flux increased with temperature, the highest rejection of organic matter (UV254) and total dissolved solids (TDS) was observed at 25 °C. The vacuum impregnation method successfully produced silica-pectin membranes effective for wetland saline water desalination via VMD. The number of layers and feed temperature critically influence the trade-off between high water productivity and superior contaminant removal.
