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August 19, 2019
dividerNews ArchivedividerABRII’s Scientists’ Achievement in Developing Nano-biosilica from Rice Waste
ABRII’s Scientists’ Achievement in Developing Nano-biosilica from Rice Waste
ABRII’s Scientists’ Achievement in Developing Nano-biosilica from Rice Waste

      Researchers at the Department of Nanotechnology of Agricultural Biotechnology Research Institute of Iran (ABRII) succeeded in developing biosilica nanoparticles from rice waste. This achievement was presented to researchers and enthusiasts at the 5th Innovation and Technology Exhibition, which was held in Tabriz 11-14 November, 2017.

      Dr. Leila Ma’mani, head of the department of nanotechnology of ABRII explained that the use of silica and other silicone compounds is essential in many products, and large quantity of these materials are produced and consumed annually. These compounds are applied in various fields, including medicine and pharmacy, agriculture, environment, cosmetic, color and rubber industries, and also as a moisture absorbent.

      She said that silica, especially in the nanoscale (with high porosity and surface-to-volume ratio), is one of the most applicable chemicals. Moreover, according to the high production cost and its chemical origin, in most cases, especially pharmaceutical, medical, Agricultural and water treatment, there is the strong tendency toward utilizing silica nanoparticles with natural origins (nano-biosilica).

      Dr. Ma’mani added that according to the various usages of biosilica and nano-biosilica in food and human health, this substance provides considerable benefits for human and plant.

      She asserted that in most cases, the agricultural wastes containing silica, and according to their abundance, providing an applicable and cost-effective way to develop silicon based compounds from them is of high importance. In this regard, extensive research has been undertaken for several decades in order to find the appropriate method for extracting this compound from agricultural wastes such as rice husk (the hard outer layers of a grain). Furthermore, horsetail plant is considered as another rich source of silica.

      Dr. Ma’mani declared that regarding the fact that the major part of rice husk, which is estimated to be hundreds of millions of tons, is burnt with the purpose of generating electricity, and a part of its ash is used in construction or insulation of buildings, and the rest is disposed as waste, extracting silica nanoparticles with high purity from rice waste can be an economical approach to develop this product from agricultural waste.

      According to Dr. Ma’mani, their team has been able to develop Nano-biosilica with various purity levels/grade (according to the application) of rice waste (straw and husk) and horsetail plant. The results showed that these nanoparticles, with the average particle’s size of less than 50 nm, have excellent properties comparing to commercial types.

      She affirmed that the application of this technology can be extended to the different fields of agriculture (plants micronutrients), medical and pharmaceutical supplies, nanobiosensors and highly sensitive electronic components, industrial nanocatalysts and polymer nanocomposites, ceramics and metal, and electrical insulating materials, water-repellent concrete and building materials.

      It is worth mentioning that this result, which was presented at the 5th Innovation and Technology Exhibition, which was held in Tabriz 11-14 November 2017, was well-received by the audience, especially researchers and specialists. 


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