Antifungal activity in vitro using kraft-pulping crude black liquor and hydrothermal treatment black liquor against wood-decaying fungi

IF 1.7 4区农林科学 Q2 MATERIALS SCIENCE, PAPER & WOOD

Journal of Wood Chemistry and Technology Pub Date : 2023-04-24 DOI:10.1080/02773813.2023.2200751

Karen Keli Barbosa Abrantes, Rayane Monique Sete da Cruz, T. V. Barros, Eliezer Rodrigues de Souto, J. Paes, L. Cardozo-Filho

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Abstract

Abstract We investigated antifungal properties of two kraft-pulping liquors as potential environmentally friendly wood preservatives targeting in deterioration by white rot (WRF) and brown rot fungi (BRF). The in vitro antifungal activity of crude black liquor (BL) and the product from a hydrothermal gasification (BLWSupc) process were investigated. Both products showed high bioactivity, with BL completely inhibiting the activity of WRF and BRF; 80% was entirely suppressed at low BL concentrations (5–10% vol/vol). Using the BLWSupc at 2.55% wt/wt, we achieved the same inhibitory effect as BL (15% vol/vol) for the two fungi. These antifungal effects can be explained by the composition of liquors that act as antioxidants, promoting enzymatic inactivation and inhibiting the growth of WRF and BRF. BLWSupc exhibited radical quenching activity against DPPH of 43.9%, and the BL, a phenolic content about 20 times higher (23.635 mg/L) than BLWSupc (2.093 mg/L), suggesting that antifungal activity of BL and BLW is related to their chemical composition. An opportunity demonstrated by this study is the reuse of BLWSupc as a protective treatment within a sustainable chain.

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木浆粗黑液和水热处理黑液对木材腐烂真菌的体外抑菌活性研究

摘要我们研究了两种硫酸盐制浆液作为潜在的环保木材防腐剂的抗真菌性能，以对抗白腐菌（WRF）和褐腐菌（BRF）的降解。研究了粗黑液及其水热气化产物的体外抗真菌活性。两种产物均表现出较高的生物活性，BL完全抑制WRF和BRF的活性；在低BL浓度（5–10%体积/体积）下，80%被完全抑制。使用2.55%wt/wt的BLWSupc，我们对这两种真菌获得了与BL（15%vol/vol）相同的抑制效果。这些抗真菌作用可以通过作为抗氧化剂、促进酶失活和抑制WRF和BRF生长的液体组成来解释。BLWSupc对DPPH表现出43.9%的自由基猝灭活性，并且BL的酚含量高出约20倍（23.635 mg/L）高于BLWSupc（2.093 mg/L），表明BL和BLW的抗真菌活性与其化学组成有关。这项研究证明了一个机会，即将BLWSupc重新用作可持续链中的保护性处理。

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来源期刊

Journal of Wood Chemistry and Technology 工程技术-材料科学：纸与木材

CiteScore

3.70

自引率

20.00%

发文量

审稿时长

3 months

期刊介绍： The Journal of Wood Chemistry and Technology (JWCT) is focused on the rapid publication of research advances in the chemistry of bio-based materials and products, including all aspects of wood-based polymers, chemicals, materials, and technology. JWCT provides an international forum for researchers and manufacturers working in wood-based biopolymers and chemicals, synthesis and characterization, as well as the chemistry of biomass conversion and utilization. JWCT primarily publishes original research papers and communications, and occasionally invited review articles and special issues. Special issues must summarize and analyze state-of-the-art developments within the field of biomass chemistry, or be in tribute to the career of a distinguished researcher. If you wish to suggest a special issue for the Journal, please email the Editor-in-Chief a detailed proposal that includes the topic, a list of potential contributors, and a time-line.