MUMBAI, India, May 29 -- Intellectual Property India has published a patent application (202641043731 A) filed by Hindusthan College Of Engineeering And Technology, Coimbatore, Tamil Nadu, on April 6, for 'fixed bed column adsorption study of remazol golden yellow (rnl) dye removal using activated carbon from phyllanthus acidus.'

Inventor(s) include Mr. Ramalingam R; Mr. Nagul Dev S; Mr. Srikanth M; Mr. Vishwa B; Mr. Sham Sunder B; Ms. Dharshini A Y; Mr. Deepak P; and Mr. Muhammad Sidnan A K.

The application for the patent was published on May 29, under issue no. 22/2026.

According to the abstract released by the Intellectual Property India: "Fixed Bed Column Adsorption Study of Remazol Golden Yellow Dye Removal Using Activated Carbon from Phyllanthus acidus. The present study investigates the removal of Remazol Golden Yellow dye from aqueous solutions using activated carbon prepared from Phyllanthus acidus in a fixed bed column adsorption system. Activated carbon derived from Phyllanthus acidus was evaluated as a low-cost and eco-friendly adsorbent for dye removal. Continuous flow column experiments were carried out to analyze the effects of operating parameters such as influent dye concentration, flow rate, and bed height on the adsorption performance. Breakthrough curves were obtained to assess the adsorption efficiency and column behaviour. The results demonstrated that higher bed heights and lower flow rates significantly enhanced dye removal efficiency and delayed breakthrough time. The prepared activated carbon was characterized using Fourier Transform Infrared Spectroscopy to identify surface functional groups, Scanning Electron Microscopy to examine surface morphology, Brunauer-Emmett-Teller analysis to determine surface area and porosity, and X-ray Diffraction to evaluate the amorphous and crystalline nature of the carbon structure. The adsorbent exhibited high removal efficiency, ranging from approximately 95% at lower concentrations to about 85% at higher concentrations. The overall adsorption efficiency decreased slightly with increasing dye concentration due to saturation of active sites but remained significantly effective throughout the study. The enhanced performance is attributed to the porous structure, high surface area, and presence of active functional groups confirmed through characterization studies."

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