Silica is considered to be the one of the most important versatile and copious chemical compound on the earth’s crust. Silica exists in crystalline, amorphous and gel forms. Wide use of silica in several industrial products had led the investigation and development of different silica extraction methods. Extraction of silica from the agricultural waste products like rice husk, bagasse, bamboo leaf, rice straw, coconut shell etc. in a cost effective manufacturing route is considered to be most challenging. Moreover extracted silica purity is affected by the metal iron and unburned carbon content in the agro waste. This paper reviews the various source of silica from agro waste and also it attempts to reveal all methodology adopted for manufacturing pure silica from the agro waste products.
Volume 11 | 08-Special Issue