Use red mud to treat metal pollution in waste water

Dr. Nguyen Trung Minh and his colleagues, from the Vietnam Institute of Science and Technology, have successfully researched to take advantage of the beneficial components of red mud, to create a new material capable of handling needle pollution. Heavy type in waste water , environmentally friendly, highly absorbable, low cost, suitable for Vietnamese conditions.

Red mud is a product (solid waste) of bauxite mining and refining Alumina. There have been many studies around the world handling red sludge, for the purpose of partially removing or safely destroying and applying its useful ingredients.

According to Dr. Nguyen Trung Minh, the research and development of products made from very important and urgent red mud now meet both objectives. It is to reduce the amount of waste in the process of bauxite mining and processing, while taking advantage of the surplus waste in the exploitation and processing of ores to create materials capable of handling heavy metal ion pollution, and Other toxic substances in water.

This is the current and pressing demand in the Central Highlands economic zones and many localities, such as Ha Giang, Cao Bang, Lang Son and Central Coast.

Initial research results show the adsorption of materials made from Bao Loc - Lam Dong red mud with heavy metal ion Pb ₂₊ and other physicochemical parameters, isothermal adsorption, indicating the ability Use red mud to treat waste pollution. It is mixing red mud with additives such as cup oil, kaolin, liquid glass (Na ₂ SiO ₃ ) in a certain proportion, adding the appropriate amount of water and mixing it well.

Particle size is 2.5mm in diameter, calcination of samples at temperatures ranging from 400-900 degrees Celsius, in which sample C1 is selected because of the steaming capacity and 0% steaming is the best, meeting the requirements of an actual adsorbent.