Harnessing ultrasound for quinonoid colorants extraction: an overview
摘要
The escalating demand for natural colorants in the food, pharmaceutical, and cosmetic industries, driven by consumer preference and regulatory shifts against synthetic dyes, has intensified the search for efficient and sustainable extraction methodologies. Quinonoid colorants, a prominent class of pigments including benzoquinones, naphthoquinones, and anthraquinones, are widely distributed in plants, but their conventional extraction often involves prolonged heating and large volumes of hazardous organic solvents, leading to degradation and environmental concerns. This review provides a comprehensive and critical overview of the growing field of ultrasound-assisted extraction (UAE) for the recovery of quinonoid colorants. We elucidate the fundamental mechanisms of acoustic cavitation and its role in enhancing cell wall disruption, improving solvent penetration, and accelerating mass transfer. The study reveals that systematically analyzes the critical process parameter such as influence of solvent type, ultrasound frequency, temperature, extraction time and operating conditions that govern the yield, purity and stability of the target colorants. By consolidating the current state-of-the-art and identifying future research directions, this overview underscores UAE as a powerful, sustainable, and economically feasible platform technology composed to transform the commercial production of high-value quinonoid colorants.