PowerPoint Presentation

Presentation on Recovery of lithium and nickel from spent batteries using amine-functionalized carbon dots under urban mining value-added recovery..

CONTENTS. INTRODUCTION BACKGROUND OF THE PROJECT AIM & OBJECTIVES LITERATURE SURVEY EXPERIMENTAL WORK RESULT ANALYSIS CONCLUSION REFERENCES.

INTRODUCTION. Spent lithium-ion batteries (LIBs) - discarded in huge amounts -severe environmental problems Conventional processes –causes corrosive liquid wastes. High consumption of acids and reductants - spent lithium-ion batteries - recycled -hydrometallurgy route Low chemical - energy consumption - attracted - attention -sustainability -recycling process..

BACKGROUND OF THE PROJECT. Annually India generates 75,000 metric tons of lithium-ion battery waste Recycling reduces the requirement for raw material mining, and prevents environmentally damaging. Recovering one ton of lithium from batteries requires only 28 tons of spent batteries, compared to 250 tons of ore The market faces high informal sector involvement and low collection efficiency, creating safety hazards and material loss..

AIM & OBJECTIVES. To recover lithium and nickel from spent battery leachate using amine-functionalised carbon dots as an efficient adsorbent material, with high selectivity, high recovery efficiency, and minimal environmental impact. To synthesize and characterise amine-functionalised carbon dots for metal-ion capture. To evaluate their adsorption toward lithium and nickel from mixed battery leach solutions. To optimise key operating parameters such as pH, adsorbent dose, contact time, temperature, and initial metal concentration for maximum recovery. To desorb and regenerate the adsorbent for repeated use and assess reusability. To recover the metals in a usable form, such as lithium carbonate and nickel salts, for possible recycling back into battery.

LITERATURE SURVEY. Recovery of Lithium, Nickel, and Cobalt from Spent Lithium-Ion Battery Powders by Selective Ammonia Leaching and an Adsorption Separation System--A novel hydrometallurgical route was developed to recover valuable metals from spent lithium-ion battery (LIB) powders. Preparation of amine functionalized carbon nanotubes via a bioinspired strategy and their application in Cu2+ removal-Amine functionalized carbon nanotubes were prepared and used for adsorption toward copper ions..

15 kT 10 2025 est. 50kT 2030 proj.. Lithium battery waste in India (2025-2030).

EXPERIMENTAL WORK. Methodology Collection Spent lithium-ion batteries are first collected, sorted, and safely discharged to remove residual electrical energy. The cells are dismantled manually or mechanically, and the active material is separated from the casing, separator, and current collector. The black mass is then dried, homogenized, and stored in airtight containers before leaching..

Leaching Synthesis of Carbon dots Carbon dots are synthesized by hydrothermal of carbon precursors biomass-derived feedstocks..

Amine functionalisation carbon dots are functionalized with amine groups Characterisation of adsorbent The prepared amine-functionalised carbon dots are characterized by TEM or SEM for morphology, XRD for structural order, FTIR for functional groups, XPS for surface chemistry and BET for surface area. Batch adsorption studies Batch experiments are performed by contacting a known dose of amine-functionalised carbon dots with real leachate under controlled conditions.

Selectivity and separation Adsorption mechanism Desorption and regeneration.

Conclusion. The recovery of lithium and nickel from spent battery waste using amine-functionalised carbon dots is a promising sustainable strategy for metal valorization. Their amino groups enhance selective adsorption of Li,Ni ions from complex leach solutions This approach supports efficient resource recovery, adsorbent reuse, and environmentally friendly battery recycling. a practical route toward circular management of battery waste..

References. Recovery of Lithium, Nickel, and Cobalt from Spent Lithium-Ion Battery Powders by Selective Ammonia Leaching and an Adsorption Separation System. ACS Sustainable Chemistry & Engineering (2017). Functionalized carbon nanotubes for selective lithium recovery from lithium-ion battery waste. RSC Advances / related indexed versions (2026). Facile preparation of amine-functionalized corn husk derived activated carbon for effective removal of selected heavy metals from battery recycling wastewater. PMC / published study (2022). Preparation of amine functionalized carbon nanotubes via a bioinspired strategy and their application in Cu2+ removal. Synthetic study on amine-functionalized carbon materials (2015). Synthesis, Purification, and Characterization of Carbon Dots. review article on carbon dot preparation (2022). Primary Amine Functionalized Carbon Dots for Dead and Alive Cell Imaging. carbon dot functionalization study (2023)..