Ultrasound-Assisted Alkaline Hydrogen Peroxide Pretreatment for Biopolymer Recovery from Exhausted Purple Corn Cobs.

ABSTRACT: This study investigates the fractionation of exhausted purple corn cobs (EPCC) (a lignocellulosic byproduct remaining after bioactive compound extraction) through alkaline hydrogen peroxide (AHP) pretreatment, with and without ultrasonic assistance. Initial biomass characterization revealed a composition of 33.08% cellulose, 21.19% hemicellulose, and only 2.69% lignin, confirming its suitability as a biopolymer source. AHP pretreatment was performed under mild conditions (10% H₂O₂, pH 11.5), with ultrasound applied for 0, 1, 5, and 10 min. Mass balance analysis showed that ultrasonic assistance significantly enhanced the removal of hemicellulose and lignin. After 10 min of treatment, delignification reached 97.4%, hemicellulose removal 58.7%, and cellulose recovery 41

SUBMITTER: Pasca Supanta E 

PROVIDER: S-EPMC12612953 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature