Baskaran Ramalingam

Title : Biomaterial functionalized graphene-magnetite nanocomposite: a novel approach for simultaneous removal of anionic dyes and heavy-metal ions

Abstract:

Despite of immense application potential of graphene in wastewater treatment, the colloidal stability, aggregation and recyclability remains a major challenge. To address this issue, we report biomaterial functionalized graphene-magnetite (Bio-GM) nanocomposite as a novel recyclable material for treatment of wastewater containing dyes and heavy metals. The integration of biomaterial including living cells of Shewanella oneidensis with graphene-magnetite nanocomposite was characterized through UV–vis, FTIR, FESEM and fluorescent microscopic studies. The contact angle measurement depicted the hydrophilic property (water contact-angle 27.93°), whereas VSM result demonstrated super paramagnetic behavior of the nanocomposite with saturation magnetization value of 30.2 emu/g. The Bio-GM nanocomposite exhibited excellent adsorption capacity toward dyes and Cr⁶⁺ in both single and multicomponent system with removal capacity of 189.63 ± 7.11 and 222.2 ± 8.64 mg/g of dyes and Cr⁶⁺, respectively, suggesting selective binding capacity and high adsorption efficiency of Bio-GM nanocomposite. In the adsorption coupled redox reaction, the Cr⁶⁺ was reduced to Cr³⁺ through biocatalytic activity of Bio-GM nanocomposite. The nanocomposite could be easily regenerated and reused for multiple cycles of adsorption–desorption studies without release of graphene and magnetite, and thus eliminating the potential hazardous risk of nanomaterial to the environment. The proposed biomaterial functionalized graphene-magnetite nanocomposite thus offers a novel way for sustainable, affordable, and efficient removal of coexisting toxic pollutants of dyes and heavy metals.

What will audience learn from your presentation?

• Preparation of magnetically water soluble separable graphene.
• Functionalization of live bacterial biofilm without using high cost equipment or chemicals
• Characterizations of Bionanomaterials
• Study of the adsorption coupled biocatalytic reduction of toxic pollutants
• Simple recycle and reuse.

Biography:

Dr. Ramalingam studied his B. Tech Biotechnology and M. E. Environmental Engineering from Anna University, India. Then joined CSIR-CLRI and published 10 research articles and one patent in the field of nanomaterials for environmental applications and completed his PhD on 2022. Currenty he is working as a Environmental Engineer at KB Environmental Services, India.
Dr. Ramalingam studied his B. Tech Biotechnology and M. E. Environmental Engineering from Anna University, India. Then joined CSIR-CLRI and published 10 research articles and one patent in the field of nanomaterials for environmental applications and completed his PhD on 2022. Currenty he is working as a Environmental Engineer at KB Environmental Services, India.