Systematic Review Article

Mapping a Decade of Research Trends on Onion Peel Waste Valorization

Maulana Nur Ardian¹ and Anathapindika Dravichi²

¹Department of Food Science and Technology, College of Agriculture, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India

²University College of Engineering (UCoE), Punjabi University, Patiala, Punjab, India

*Corresponding author e-mail: 63174@gbpuat.ac.in

(Received: 10/07/2025; Revised: 15/09/2025; Accepted: 28/09/2025; Published: 20/12/2025)

ABSTRACT

The global agro-industrial industry is currently facing a major challenge in the management of organic waste, which is generated in large quantities. Onion peel/skin, one of the most neglected agricultural byproducts, holds considerable promise as a valuable source of bioactive compounds. This article aims to map the trends and directions of research related to the valorization of onion skin waste in the period 2014-2024 through a scientometric approach. Data were retrieved from the DOAJ database, with a total of 71 articles analyzed. The study showed a marked rise in publications since 2021. Primary focus on antioxidant activity, extraction methods, and applications in pharmaceutical and agro-industrial sectors. The findings indicate growing recognition of onion peel waste as a high-potential resource for sustainability and circular-economy frameworks. This review is expected to provide a foundational basis for future research and the broader development of onion peel/skin valorization.

Keywords: Onion peel/skin, waste valorization, research mapping, sustainable agro-industry