超声辅助从泥炭中提取腐殖质：过程效率和产品质量评估。
Ultrasound-Assisted Extraction of Humic Substances from Peat: Assessment of Process Efficiency and Products' Quality.
机构信息
Department of Engineering and Technology of Chemical Processes, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
Department of Micro, Nano and Bioprocess Engineering, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
出版信息
Molecules. 2022 May 25;27(11):3413. doi: 10.3390/molecules27113413.
Results of efficiency of obtaining humic substances (HSs) from peat in traditional alkaline extraction (TAE) and ultrasound-assisted alkaline extraction (UAAE) are presented. The influence of the duration of the process and ultrasound intensity on the efficiency of extraction of humic acids (HAs) and fulvic acids (FAs) extraction was determined. The composition of the fulvic acid fraction was examined depending on the type of eluent used. Fulvic acids were divided into fractions using columns packed with DAX-8 resin. For this process, 0.1 M NaOH and 0.5 M NH∙HO were used as eluents. For the quality assessment of specific fulvic acids fractions, spectroscopic methods (UV-Vis and FTIR) were used. Ultrasound had a positive effect on HS extraction efficiency, especially in increasing the amount of a desired hydrophobic fraction of fulvic acids (HPO). However, a negative effect of the excessive prolongation and ultrasound intensity (approximately 400 mW∙cm) on the extraction efficiency of HPO eluted with 0.1 M NaOH solution was observed. Using peat as a raw carbon material for the HS extraction process can be used as an alternative industrial application of peat. UAAE may be considered as an alternative method to TAE, which provides a higher efficiency in HS isolation from peat.
本文介绍了从泥炭中采用传统堿提法（TAE）和超声辅助堿提法（UAAE）提取腐殖质（HSs）的效率结果。考察了反应时间和超声强度对提取腐殖酸（HAs）和富啡酸（FAs）效率的影响。根据所用洗脱剂的类型，检查了富啡酸级分的组成。使用 DAX-8 树脂填充柱将富啡酸分为级分。为此，使用 0.1 M NaOH 和 0.5 M NH₃·H₂O 作为洗脱剂。为了评估特定富啡酸级分的质量，使用了光谱方法（UV-Vis 和 FTIR）。超声对 HS 提取效率有积极影响，特别是在增加所需疏水性富啡酸（HPO）的量方面。然而，观察到在用 0.1 M NaOH 溶液洗脱时，过长的延长时间和超声强度（约 400 mW·cm）对 HPO 的提取效率有负面影响。使用泥炭作为 HS 提取过程的原始碳材料，可以作为泥炭 HS 提取的替代工业应用。UAAE 可以被认为是 TAE 的替代方法，它可以提高从泥炭中分离 HS 的效率。
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