Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
Removal of Lead from Wastewater using Nanoscale MoS2
Categories for this Invention
Technology: removal of lead from wastewater using nanoscale MoS2
Industry: Renewable Energy; Applications: Water Treatment;
Market: The global wastewater treatment market is projected to reach USD 80.4B by 2028, at a CAGR of 6.3% during (2022-2028).
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Problem Statement
- In the present era, water is becoming increasingly contaminated especially heavy metals including other variety of pollutants mainly from agricultural & Industrial sources.
- Based on prior arts discussion, there are a few techniques discussed for identifying & removing heavy metals , however said techniques are unable to provide better results in terms of heavy metal like lead (Pb)
- & said processes involves tedious steps & having costlier process.
- Hence, there is a need to addressed above issues.
- Present invention provides sustainable solution for heavy metal remediation in wastewater.
Technology
Present patent claimed a process of scavenging Pb2+ & Pb4+ in a solution
Said method comprises the steps of:
- First Step describes about adding 1ml of lead (Pb) source to 4ml of chemically exfoliated-MoS2 nanosheet anchored on oxide support in a reaction bottle and constantly magnetic stirring the reaction for 6 hours;
- Second step describes about centrifuging the reaction mixture at 3000 rpm for 5 min; and
Third step describes about collecting the precipitate and washing repeatedly with H2O remove the excess reactants.
Outcome Results
- Said scavenging of Pb2+ and Pb4+ occurs through a chemical reaction between the chemically exfoliated-MoS2 nanosheet & lead in the solution resulting in an instant visual change.
- Wherein light green color of the chemically exfoliated-MoS2 dispersion immediately turns milky white upon reacting with the lead in solution, followed by precipitation of the reaction products in the form of PbMoO4-xSx complex.
Key Features / Value Proposition
Technical Perspective:
- Proposed method is using the MoS2 nanosheets is in the size up to 1μm length with 2-3 layers thickness.
- The lead (Pb) source used in the process for Pb2+ is Pb(OAC)2 and for Pb4+ is PbO2.
- MoS2 nanosheets are supported on oxide including SiO2, Al2O3.
Industrial Perspective:
- Proposed method is cost-effective, & simple, & applicable for aqueous /non- aqueous solution.
- Chemically exfoliated-MoS2 nanosheets used as an adsorbent to capture &remove the Pb species from water.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Pradeep T
Department of Chemistry
Intellectual Property
IITM IDF Ref. 1584
Patent No: 365164
Technology Readiness Level
TRL-4
Proof of Concept ready & validated