Pretreatment is crucial for effective enzymatic saccharification of lignocellulose such as sugarcane bagasse (SCB). In the present study, SCB was pretreated with five kinds of heterogeneous Fenton‐like systems (HFSs), respectively, in which α‐FeOOH, α‐Fe2O3, Fe3O4, and FeS2 worked as four traditional heterogeneous Fenton‐like catalysts (HFCs), while FeVO4 worked as a novel HFC. The enzymatic reducing sugar conversion rate was then compared among SCB after different heterogeneous Fenton‐like pretreatments (HFPs), and the optimal HFS and pretreatment conditions were determined. The mechanism underlying the difference in saccharification efficiency was elucidated by analyzing the composition and morphology of SCB. Moreover, the ion dissolution characteristics, variation of pH and Eh values, H2O2 and hydroxyl radical (·OH) concentration of FeVO4 and α‐Fe2O3 HFSs were compared. The results revealed that the sugar conversion rate of SCB pretreated with FeVO4 HFS reached up to 58.25%, which was obviously higher than that under other HFPs. In addition, the surface morphology and composition of the pretreated SCB with FeVO4 HFS were more conducive to enzymatic saccharification. Compared with α‐Fe2O3, FeVO4 could utilize H2O2 more efficiently, since the dissolved Fe3+ and V5+ can both react with H2O2 to produce more ·OH, resulting in a higher hemicellulose and lignin removal rate and a higher enzymatic sugar conversion rate. It can be concluded that FeVO4 HFP is a promising approach for lignocellulose pretreatment.

中文翻译：

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钒酸铁在异质类芬顿系统中预处理甘蔗渣及其酶糖化的效率更高

预处理对于甘蔗渣 (SCB) 等木质纤维素的有效酶促糖化至关重要。在本研究中，SCB分别用五种异质类芬顿体系（HFS）进行预处理，其中α-FeO​​OH、α-Fe2氧3, 铁3氧4, 和 FeS2作为四种传统的多相芬顿类催化剂（HFC），而 FeVO4作为一种新型的 HFC。然后比较不同异质类芬顿预处理（HFP）后SCB的酶促还原糖转化率，并确定最佳的HFS和预处理条件。通过分析 SCB 的组成和形态，阐明了糖化效率差异的机制。此外，离子溶解特性、pH 值和 Eh 值、H 的变化2氧2和 FeVO 的羟基自由基 (·OH) 浓度4和α-Fe2氧3比较了 HFS。结果表明，经 FeVO 预处理的 SCB 的糖转化率4HFS达到58.25%，明显高于其他HFP。此外，用 FeVO 预处理的 SCB 的表面形貌和成分4HFS更有利于酶促糖化。与α-Fe相比2氧3, 氧化铁4可以利用H2氧2更有效，因为溶解的铁3+和V5+均可与H反应2氧2产生更多的·OH，从而获得更高的半纤维素和木质素去除率以及更高的酶解糖转化率。可以得出结论，FeVO4HFP 是一种很有前景的木质纤维素预处理方法。