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<p>This study investigates a sustainable, one-step alkaline–hydrogen peroxide (AHP) extraction strategy for the dual recovery of pectin-derived soluble fractions (PSF) and bioactive extractive fractions (EF) from mature-green mango peel (Chok Anan cultivar). The influence of oxidative severity (1–5% H<sub>2</sub>O<sub>2</sub>) was evaluated against conventional water and alkaline extractions. Results demonstrated that increasing AHP severity significantly promoted pectic depolymerization; while the weight-average molecular weight of the PSFs was reduced from 54.1 to 17.7&#xa0;kDa, PSF yields decreased from 32.0% to 9.5%, with galacturonic acid content being concurrently enriched as H<sub>2</sub>O<sub>2</sub> concentrations increased. These low-molecular-weight PSFs exhibited specific inhibition against <i>Bacillus cereus</i> and <i>Acinetobacter lwoffii</i>. However, a decline in antioxidant capacity (evaluated via DPPH, ABTS, and FRAP assays) was observed as the molecular size decreased. Similarly, high-severity AHP conditions caused a significant decrease in the bioactive properties of the EFs, despite EF yields reaching a maximum of 61.4%. The EFs obtained under mild conditions exhibited the highest antioxidant activities and retained high levels of gallic acid, chlorogenic acid, and mangiferin, providing potent inhibition against <i>Staphylococcus aureus</i>, <i>Bacillus cereus</i>, and <i>Acinetobacter lwoffii</i>. These findings highlight a critical trade-off between the structural modification of soluble carbohydrate fractions and bioactive retention, offering a tunable laboratory-scale platform for the valorization of agro-industrial waste into functional carbohydrate and phenolic-rich ingredients.</p>

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One-Step Alkaline–Hydrogen Peroxide Extraction of Mango Peel for Dual Recovery of Pectin-Derived Soluble and Bioactive Fractions

  • 期刊论文

  • 发表日期：

    2026年5月16日

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  • Virna Muhardina,
  • Wascharin Udchumpisai,
  • Nialmas Samuela,
  • Sopin Jaibangyang,
  • Kannika Kunyanee,
  • Akkaradech Nakornsadet,
  • Bing-Zheng Li,
  • Yuree Wandee

摘要

This study investigates a sustainable, one-step alkaline–hydrogen peroxide (AHP) extraction strategy for the dual recovery of pectin-derived soluble fractions (PSF) and bioactive extractive fractions (EF) from mature-green mango peel (Chok Anan cultivar). The influence of oxidative severity (1–5% H2O2) was evaluated against conventional water and alkaline extractions. Results demonstrated that increasing AHP severity significantly promoted pectic depolymerization; while the weight-average molecular weight of the PSFs was reduced from 54.1 to 17.7 kDa, PSF yields decreased from 32.0% to 9.5%, with galacturonic acid content being concurrently enriched as H2O2 concentrations increased. These low-molecular-weight PSFs exhibited specific inhibition against Bacillus cereus and Acinetobacter lwoffii. However, a decline in antioxidant capacity (evaluated via DPPH, ABTS, and FRAP assays) was observed as the molecular size decreased. Similarly, high-severity AHP conditions caused a significant decrease in the bioactive properties of the EFs, despite EF yields reaching a maximum of 61.4%. The EFs obtained under mild conditions exhibited the highest antioxidant activities and retained high levels of gallic acid, chlorogenic acid, and mangiferin, providing potent inhibition against Staphylococcus aureus, Bacillus cereus, and Acinetobacter lwoffii. These findings highlight a critical trade-off between the structural modification of soluble carbohydrate fractions and bioactive retention, offering a tunable laboratory-scale platform for the valorization of agro-industrial waste into functional carbohydrate and phenolic-rich ingredients.