Revealing the influence of metallic chlorides pretreatment on chemical structures of lignin and enzymatic hydrolysis of waste wheat straw.
Revealing the influence of metallic chlorides pretreatment on chemical structures of lignin and enzymatic hydrolysis of waste wheat straw.
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DOI：
10.1016/j.biortech.2021.125983
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发表时间：
2021-09
影响因子：
11.4
通讯作者：
Wei Tang;Xinxing Wu;Caoxing Huang;Zhe Ling;Chenhuan Lai;Q. Yong
中科院分区：
文献类型：
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作者：
Wei Tang;Xinxing Wu;Caoxing Huang;Zhe Ling;Chenhuan Lai;Q. Yong
在木质纤维素的预处理中添加各种金属氯化物已经被广泛报道，以通过纤维素分解加工提高纤维素转化率。然而，木质素与金属阳离子之间的相互作用机制还不是很清楚。采用不同浓度的FeCl 3和AlCl 3对废小麦秸秆进行预处理，以提高酶解效率。结果表明，FeCl 3和AlCl 3预处理可使木聚糖的酶解效率分别从50.4%提高到82.9%和76.6%，其中FeCl 3和AlCl 3的木聚糖去除率分别提高了33.8%和36.5%。同时，废麦草木质素的表面电荷、疏水性和蛋白质吸附量分别降低了3.3 mV、0.6 L/g、7.6 mg/g（FeCl 3）。这是由于木质素在金属氯化物预处理中发生解聚所致。这些发现将用于进一步评估金属氯化物在生物炼制预处理中的作用。
The addition of various metallic chlorides in pretreatment of lignocellulose have been widely reported to improve cellulose conversion via cellulolytic processing. However, the interaction mechanism between lignin and metallic cations is not well known. In this work, pretreatment with different concentrations of FeCl3and AlCl3were performed upon waste wheat straw to enhance enzymatic hydrolysis efficiency. Results showed that pretreatment with FeCl3and AlCl3could facilitate the enzymatic hydrolysis efficiency increasing from 50.4% to 82.9% and 76.6%, which was attributed to the enhancement of xylan removal by 33.8% (FeCl3) and 36.5% (AlCl3), respectively. Meanwhile, the surface charge, hydrophobicity, and protein adsorption capacity of lignin from waste wheat straw can be decreased by 3.3 mV, 0.6 L/g, 7.6 mg/g (FeCl3). This was due to the depolymerization of lignin in metallic chlorides pretreatment. These findings will be used to further evaluate the effect of metallic chlorides in biorefinery pretreatment.