Performance of Rambutan Seed Extracts as Iron and Manganese Removal in Drinking Groundwater well in Tanah Merah, Kelantan. JTRSS [Internet]. 2017 Dec. 31 [cited 2025 Aug. 22];5(2):79-82. Available from: https://journal.umk.edu.my/index.php/jtrss/article/view/596