文献类型：期刊文献

英文题名：Integral valorization of banana peel through pectin and biochar production for methylene blue adsorption from aqueous solutions

作者：Wei, Wei[1];Wang, Ganbin[2];Qin, Guotong[2]

第一作者：魏微

通讯作者：Wei, W[1]

机构：[1]Beijing Union Univ, Coll Biochem Engn, 18 Sanqu, Beijing 100023, Peoples R China;[2]Beihang Univ, Sch Mat Sci & Engn, Beijing, Peoples R China

第一机构：北京联合大学生物化学工程学院

通讯机构：[1]corresponding author), Beijing Union Univ, Coll Biochem Engn, 18 Sanqu, Beijing 100023, Peoples R China.|[1141726]北京联合大学生物化学工程学院;[11417]北京联合大学;

年份：2026

外文期刊名：CHEMICAL ENGINEERING COMMUNICATIONS

收录：;EI(收录号：20261820642557);WOS:【SCI-EXPANDED(收录号:WOS:001753711200001)】；

基金：This work was supported by the National Natural Science Foundation of China (52370062).

语种：英文

外文关键词：Integral valorization; banana peel; pectin; biochar; methylene blue; adsorption

摘要：This investigation developed a sustainable approach for banana peel valorization through sequential extraction and thermal conversion processes. Pectin was initially isolated from banana peel biomass using phosphoric acid-assisted acid hydrolysis. The optimal extraction yield of 12.00% was achieved at a phosphoric acid concentration of 0.5 M. The acid-impregnated solid residue remaining after extraction was subsequently valorized for biochar synthesis via controlled pyrolysis at multiple thermochemical conversion temperatures (250-550 degrees C). Notably, the residual phosphoric acid in the substrate served as an intrinsic activating agent during carbonization, eliminating the need for external chemical activators and thereby reducing the production cost of biochar. The synthesized biochars were comprehensively characterized using a series of analytical techniques, including N2 adsorption, scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR). Subsequently, the engineered biochars were systematically assessed for their adsorption performance of methylene blue in aqueous solutions. The biochar produced at the optimal pyrolysis temperature of 350 degrees C (BC350) exhibited superior textural properties, attaining the maximum BET surface area and adsorption capacity. A statistical physics-based multilayer adsorption model provided mechanistic insights, suggesting multi-molecular occupancy at heterogeneous adsorption sites (n = 2.20 molecules/site). According to this model, the saturated adsorption capacity of BC350 for methylene blue reached 173.4 mg g-1. Thermodynamic analysis indicated physisorption dominance with endothermic characteristics. pH-dependent adsorption behavior was observed, suggesting the involvement of electrostatic interaction mechanisms.