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Rice husk is a byproduct of rice milling that is commonly available in Vietnam due to the country's massive rice producing industry. While rice husk has traditionally been considered a waste product, recent research has shown that it has potential for use in wastewater treatment. This study comprehensively reviews a multitude of aspects regarding the application of rice husk waste in water treatment in Vietnam. The effectiveness of rice husk as an adsorbent material for removing heavy metals, organic compounds, and dyes from wastewater is highlighted. Besides, rice husk is even used for treating floodwater in Vietnam. The use of rice husk waste for water treatment has significant potential for both environmental and economic benefits for Vietnam. It provides a low-cost, sustainable alternative to traditional wastewater treatment methods and can help to address the country's ongoing water pollution challenges.