Wetland saline water is the enormous problem faced by rural people in Kalimantan, Indonesia. During rainy season, seawater intrudes wetland aquifer and turns water to saline. Application of membrane silica–pectin is eligible to solve this issue. Sadly, this water contains high concentration of organic matter that contributes to declining of membrane performance. Therefore, coagulation pretreatment is explored to enhance membrane filtration performance. The objective of this work is to investigate the optimum condition of coagulation pretreatment to enhance silica–pectin membrane performance for wetland saline water desalination. Sol gel process was employed to fabricate silica–pectin membrane and calcined via rapid thermal processing technique. Desalination was operated by pervaporation at 25–60°C. Maximum removal of organic matter UV₂₅₄ was obtained at coagulant 30 g L⁻¹ of 83.5% (pH 7). Combination processes between coagulation pretreatment and silica–pectin membranes offered high water flux at 60°C (12.2 kg m⁻² h⁻¹). The UV₂₅₄ rejection of the feed water with coagulation is 43% higher than without applying coagulation pretreatment. Overall, salt rejection for all processes was extremely good (99.9%). Application of coagulation as pretreatment is promising to enhance performance of silica–pectin membrane for wetland water desalination.

中文翻译：

---

混凝作为膜式湿地盐水淡化的预处理

湿地盐水是印度尼西亚加里曼丹省农村人民面临的巨大问题。在雨季，海水侵入湿地含水层并将水转化为盐分。硅-果胶膜的应用可以解决这个问题。可悲的是，这种水含有高浓度的有机物，这会导致膜性能下降。因此，探索了凝结预处理以增强膜过滤性能。这项工作的目的是研究凝结预处理的最佳条件，以增强硅-果胶膜在湿地盐水淡化中的性能。溶胶凝胶法被用于制造硅果胶膜并通过快速热处理技术进行煅烧。通过在25–60°C下进行全蒸发进行脱盐。最大程度去除紫外线在凝结剂30g L ^-1为83.5％（pH 7）下获得₂₅₄。混凝预处理和硅果胶膜之间的结合过程可在60°C（12.2 kg m ^-2 h ^-1）下提供高水通量。凝结进水的紫外线₂₅₄拒收率比未进行凝结预处理的进水高43％。总体而言，所有过程的脱盐率都非常好（99.9％）。凝结作为预处理的应用有望增强硅果胶膜在湿地水脱盐中的性能。