发酵糠醛渣中生化腐植酸的提取与表征（英文）

Extraction and Characterization of Biological Humic Acids from Fermented Furfural Residue

[目的]解决腐植酸的水溶性问题以及钠离子连续、长期在土壤中的累积对土壤环境带来的不利影响。[方法]以发酵糠醛渣为原料,采用碱溶酸析法提取生化腐植酸(BHA),考察固液比(糠醛渣与水的质量比)、碱液浓度、提取温度、提取时间对生化腐植酸含量的影响,并且通过红外光谱对其结构进行了表征。[结果]最佳的提取工艺条件为∶固液比1∶7、碱液浓度6%KOH、提取时间1 h、提取温度70℃,此时生化腐植酸含量为8.5%。红外光谱分析表明,提取得到的生化腐植酸和商品腐植酸结构相似,但BHA官能团种类较多,分子量较小。[结论]该工艺生产操作简单,稳定可行,可用于提取生化腐植酸。利用BHA开发制备腐植酸类新型肥料有很好的发展前景。

Objective] This study aimed to eliminate the negative effects brought about by continuous, long-term accumulation of sodium ions in soil on soil environ-ment. [Method] Biological humic acids （BHAs） were extracted from fermented furfural residue via alkali-dissolution and acidification. The effects of solid-liquid ratio （mass ratio of fermented furfural residue to water）, alkali concentration, extraction tempera-ture and extraction time on the content of BHA were investigated. Also its structure was characterized by FTIR. [Result] The optimal extraction conditions were as fol-lows： solid-liquid ratio of 1：7, KOH concentration of 6%, extraction temperature of 70℃ and extraction time of 1 h. Under the optimal conditions, the content of BHAs extracted was up to 8.5%. The infrared spectrum analysis indicated that BHA had more types of functional groups and lower molecular weight than commercial humic acid although they had similar structures. [Conclusion] The technique has the ad-vantages of simple operation and good stability, and is suitable for extracting BHAs. BHAs have a good prospect in developing new types of humic acid fertilizers.