Scholarlink

<p>This study explores the potential of corncob waste valorization through microwave-assisted hydrolysis for xylooligosaccharides (XOS) production using potash alum (AlK(SO₄)₂) as a catalyst. The process was optimized through a One-factor-at-a-time (OFAT) approach, evaluating potash alum concentration, heating time, and reaction temperature. Optimal conditions (20 µmol/mL potash alum, 5&#xa0;min, 160&#xa0;°C) yielded 12.32&#xa0;g/L XOS in the hydrolysate, with ethanol precipitation achieving a purified XOS yield of 16.97%w/w. Potash alum was chosen as an alternative catalyst due to its potential cost-effectiveness and milder environmental impact compared to strong acids, though further comparative analysis is warranted. The effects of pretreatment on the changes in surface morphology, crystallinity, and functional groups of the biomass are discussed. The purified XOS exhibited strong antioxidant activity (94.16 ± 0.54% DPPH radical scavenging) and high total phenolic content (32.63 ± 0.29&#xa0;µg GAE/mg of XOS). In vitro prebiotic assays demonstrated XOS’s capacity to enhance probiotic growth, particularly <i>Lactobacillus fermentum</i>, which showed the highest prebiotic index and prebiotic activity within 24&#xa0;h. These findings suggest that corncob-derived XOS can serve as a functional ingredient with prebiotic and antioxidant properties, supporting its application in health-promoting food and nutraceuticals.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Microwave-Assisted Pretreatment of Corncob Using Potash Alum (AlK(SO₄)₂) Catalyst for Enhanced Xylooligosaccharide (XOS) Production with High Prebiotic and Antioxidant Properties

  • 期刊论文

  • 发表日期：

    2025年7月10日

查看全文
  • Umar Seno Aji,
  • Hana Nur Fitriana,
  • Haqqyana,
  • Khaswar Syamsu,
  • Riksfardini Annisa Ermawar,
  • Dewi Sondari,
  • Isti Qomariah

摘要

This study explores the potential of corncob waste valorization through microwave-assisted hydrolysis for xylooligosaccharides (XOS) production using potash alum (AlK(SO₄)₂) as a catalyst. The process was optimized through a One-factor-at-a-time (OFAT) approach, evaluating potash alum concentration, heating time, and reaction temperature. Optimal conditions (20 µmol/mL potash alum, 5 min, 160 °C) yielded 12.32 g/L XOS in the hydrolysate, with ethanol precipitation achieving a purified XOS yield of 16.97%w/w. Potash alum was chosen as an alternative catalyst due to its potential cost-effectiveness and milder environmental impact compared to strong acids, though further comparative analysis is warranted. The effects of pretreatment on the changes in surface morphology, crystallinity, and functional groups of the biomass are discussed. The purified XOS exhibited strong antioxidant activity (94.16 ± 0.54% DPPH radical scavenging) and high total phenolic content (32.63 ± 0.29 µg GAE/mg of XOS). In vitro prebiotic assays demonstrated XOS’s capacity to enhance probiotic growth, particularly Lactobacillus fermentum, which showed the highest prebiotic index and prebiotic activity within 24 h. These findings suggest that corncob-derived XOS can serve as a functional ingredient with prebiotic and antioxidant properties, supporting its application in health-promoting food and nutraceuticals.