Recycled Paper Sludge (RPS)-Derived Nanocellulose: Production, Detection and Water Treatment Application

Paper production and recycling result in large amounts of recycled paper sludge (RPS) that is currently being disposed very costly unsustainable practices, raising the importance developing green solutions for waste management. The use nanocellulose (NC) as next generation materials has gained much attention due to its economic potential. However, there are substantial challenges NC extraction, detection, quantification methods. In this study, was produced from RPS a means converting into resource. process included short, 30 min ozonation (21 mg O3/g RPS), which allowed sufficient delignification facilitated following hydrolysis step. Among all tested durations, 4-h with 64% w/w sulfuric acid resulted highest production. Fluorescent staining by calcofluor white used simple low-cost detection in-situ. Crude showed significant 63% dye uptake 0.1 ppm red 131 within min. Compared standard disposal methods RPS, utilization supports circular economy concept significantly contributes development cellulose bio-based nanomaterials water treatment applications.