On September 28, 2026

Sequential Extraction of Pectin and Cellulose fromOrange Peel Waste: A SustainableWaste-to-Valorization Approach

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Agricultural waste is a huge and underutilized resource of useful biomaterials that are best for
sustainable use. The goal of the present study was to develop an integrated waste valorization
approach, in which orange peel waste is valorized in the form of cellulose and pectin and their potential
is assessed in combination with green synthesis of nanoparticles. Orange peel powder was treated with
acid-assisted extraction to obtain pectin, and the remaining biomass was treated with alkaline and
bleaching processes to isolate cellulose. The pomegranate peel extract was used for the synthesis of
iron NPs using a natural reducing and stabilizing agent as an alternative to the conventional methods
that use hazardous chemicals. To aid characterization of the structural and functional properties, extracted biopolymers and synthesized NPs. Orange peel waste was found to be a potential renewable
source for the recovery of biopolymers in the form of pectin (2.22%) and cellulose (5.35%). FTIR
analysis confirmed the characteristic functional groups of pectin and cellulose and UV–visible
spectroscopy confirmed the successful synthesis of iron nanoparticles. In addition, the antimicrobial
properties of the created material were determined using the created materials was determined using
the agar well diffusion method. The cellulose–iron nanoparticles blending showed a zone of inhibition
of 9 mm while the pectin iron nanoparticles film had a zone of inhibition of 7 mm, which proved their
antimicrobial property. The results confirm that agricultural waste can be effectively converted to value
added biopolymers and functional materials by the sustainable processing pathways. This research
shows the potential use of orange peel-based biomaterials in food packaging, biomedicals products,
pharmaceutical formulation and development of environmentally friendly materials.

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