Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
Method for Accumulation of Silver by Rice and Possible Metal Extraction by Agriculture
Categories for this Invention
Technology: Accumulation of Silver by Rice & Possible Metal Extraction by Agriculture
Industry: Food Industry (Cereals);
Applications: Extraction of silver/metal in Agriculture applications; Bio-amplificaion
Market: The global precious metals recovery market is projected to reach USD 18.7B by 2030, growing at a CAGR of 7% from 2022 to 2030.
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Problem Statement
- Generally, concentration of silver in soil does not exceed 0.1 mg/kg & in agriculture crops it is <1mg/kg of dry weight.
- Enhanced accumulation of arsenic & other heavy metals have seen in several rice varieties. Further, a few conventional method for manufacturing/extraction of a plurality of gold nanoparticles in a plant discussed herein.
- However, accumulation & extraction of metals from rice to a greater extent is not discussed so far.
- Present Patent discussed rice variety which accumulates silver to the extent of 15 mg/kg making it a viable method for extractive metallurgy.
Technology
Present patent claimed a process of accumulation and extraction of noble metal, silver from soil in Garib-sal rice variety.
Said method comprises the steps of:
- Growing Garib-sal rice variety in a soil rich in heavy metals;
- Extracting the metal from the bran of Garib-sal rice variety by burning the hay and husk, & then processing the residue to obtain the metal.
- The silver is accumulated in the aleuronic layer of the rice grain & the variety showed enhanced silver accumulation upto 15.61 mg/kg in its grain grown in the soil with Ag concentration of approximately 0.15 mg/kg.
Key Features / Value Proposition
Technical Perspective:
- The process facilitates said silver decreases subcutaneously in sub aleurone & negligible in the endosperm of the rice grain, results of ~100 times bio-amplification.
- The accumulation of silver in the aleuronic layer of the rice grain is identified using nano SIMS.
Industrial Perspective:
- The silver is extracted from the bran after milling of the rice, thereby causing no loss of the foodstuff, wherein said metal comprises silver, gold, platinum, iron, manganese, chromium, copper, palladium, tin, zinc, cobalt and nickel.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Pradeep T
Dept. of Chemistry
Intellectual Property
IITM IDF Ref. 1268
Patent No: 365675 (Granted)
Technology Readiness Level
TRL-3/4
Proof of Concept ready validated