Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
A Process for the removal of Dyes from waste waters of Industrial Effluents
Technology Category/Market
Technology: Method for the removal of Dyes from waste waters;
Industry: Textile Industries & dye processing Industries & etc.
Applications: Industrial wastewater treatment
Market: The global wastewater treatment market is projected to grow at a CAGR of    6.3% during the period of 2022 to 2028
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Problem Statement
- Generally, there are many treatment methods have already available for wastewater treatment by using functionalized nanocomposites, which is expensive and tedious process.
- Hence, there is a need to mitigate above challenges efficiently.
- Present Patent provides solution by addressing above issues in efficient manner.
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Technology
- The present invention describes a process for the preparation of nanocomposite adsorbents for the removal of dyes from wastewaters of Industrial effluents.
- The proposed process consists of mainly three steps which are illustrated in the smart chart A and suitable figures.
- The three different dimensional nanomaterial before & after have been characterized by UV-visible and FTIR-spectrum for ensuring color absorbance, shown in Fig.1a,,1b,1c.
- The key features of said patent is given herein:
- 1st step explains the preparation of nanocomposites from at least one substances of the following group of nanometals & nanomaterial oxides;
- 2nd step talks about passing the waste-water through at least nanofiltration membrane
- 3rd step discloses
- further
- passing the filtered wastewater thereafter over the nanocomposites to enable the nanocomposites to absorb the dyes in the wastewater
Key Features/Value Proposition
Technical Perspective:
- The nanocomposites are prepared from selected group of nanometals & nanometal oxides like Au, Ag, Fe, Co, Ni, Pt, Pd, Ru, ZnO. TiO2, MnO2, Fe2O3, Fe3O4 dispersed on a support material consisting of two or three different dimensional nanomaterials selected from namely carbon nanotubes, thermally exfoliated graphite, chemically exfoliated graphite oxide, graphene sheets, graphene functionalized carbon nanotubes/graphene.
- The Nanofilteration membrane is configured of a biocompatible material such as chitosan, polypyrote.
- The nanocomposites are being further treated with an inorganic acid for re-using said nanocomposites, (inorganic acids consists of hydrochloric, sulphuric, and nitric acid).
- Optimum conditions for all dyes removal were obtained with absorbent dosage of 100ppm of dye in 1 litre of water per gram with an equilibrium time of 1 hour.
Industrial Perspective:
- Cost effective & simple eco-friendly sustainable process for wastewater treatment thereafter reuse water.
- Facilitates the experimental results by the removal of Tolune blue, Evan’s blue, Trypan blue, Eosin yellow & Coomassic Brilliant Blue from aqueous solutions, VAT dye, AZO dye &industrial wastewaters.
Questions about this Technology?
Contact for Licensing
Research Lab
Prof. Ramapabhu S,Â
Department of Physics
Intellectual Property
IITM IDF Ref. 785
IN Patent No: 288734
Technology Readiness Level
TRL- 4/5
Proof of Concept, tested & validated