A review on recent advances in the comprehensive application of rice husk ash

Rice husk ash, which is rich in non-crystalline silica, is a by-product material obtained from the combustion of rice husk. Because rice husk ash is available abundantly at a throw-away price with the large specific surface area and the high reaction activity, it is deemed a valued material, which has demonstrated significant influence in not only improving the development of industrialization but also in keeping the environment free from pollution. This paper presents a comprehensive overview of the work carried out on the use of rice husk ash as pozzolanic material, an adsorbent, as well as a source of silica.