Unveiling the mechanism of ultrasound-assisted phenolic extraction from Psidium cattleianum leaves: Kinetic, mass transfer, and thermodynamic insights

作者：Hoang Huynh, Parushi Nargotra, Huimin Wang, Yung‐Hsiang Tsai, Chien‐Chih Chiu, Chwen‐Jen Shieh, Yung‐Chuan Liu, Chia‐Hung Kuo · 发表于：Ultrasonics Sonochemistry · 年份：2025 · DOI：10.1016/j.ultsonch.2025.107675 · 被引用次数：3 · 研究领域：Phytochemicals and Antioxidant Activities、Adsorption and biosorption for pollutant removal、Microbial Inactivation Methods

Strawberry guava leaves ( Psidium cattleianum ) are an attractive phenolic-rich byproduct for food and pharmaceutical production, with potential benefits for human health due to their exceptional antioxidant activity among plant-based resources. However, there are no systematic studies on sonochemical phenolic extraction from this material. Therefore, the goal of this study was to unveil the mechanism of ultrasound-assisted extraction (UAE) for phenolic recovery from Psidium cattleianum leaves. Pseudo-second-order kinetic modeling, Biot number, and thermodynamic analysis were introduced to describe the extraction mechanisms and then kinetic parameters such as saturation concentration ( C s ), extraction rate ( k) , diffusion coefficient ( D eff ), and mass transfer coefficient ( K T ) compared with conventional shaking extraction (CSE) to establish the process intensification benefits. The result of pseudo-second-order kinetic analysis revealed a biphasic extraction mechanism consisting of initial rapid release, followed by diffusion-controlled mass transfer, with internal mass transfer identified as the rate-limiting step ( Bi > 50). The UAE process was spontaneous (ΔG o < 0), endothermic (ΔH o = 3.8151 kJ/mol), and entropy-driven (ΔS o > 0). The presence of ultrasound technology enabled UAE to demonstrate superior performance compared to CSE, which significantly increased C s , k, D e and K T . Taken together, the integration of kinetic and thermodynamic analyses offers a r...