碱性萃取剂对从草本泥炭中分离出的腐殖酸的影响的光谱分析

IF 0.8 4区化学 Q4 SPECTROSCOPY

Spectroscopy Pub Date : 2024-03-01 DOI:10.56530/spectroscopy.wk3774u5

Liping Li, Litong Ma, Yanan Lu, Ying Wang, Shenguang Sun

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引用次数: 0

摘要

为了研究各种萃取剂对泥炭腐植酸结构的影响，采用碱萃取法和酸沉淀法，使用NH3-H2O、Na2CO3、NaHCO3和Na2SO3萃取泥炭腐植酸。利用紫外可见光谱（UV-vis）、傅立叶变换红外光谱（FT-IR）和荧光光谱（FL）对提取的泥炭腐植酸进行了表征。结果表明，萃取剂对泥炭腐殖酸含量的影响微乎其微。Na2CO3 是从泥炭中分离腐殖酸最有效的萃取剂，其含量最高，为 66.20%，产率为 32.67%。此外，在所用的萃取剂中，NH3-H2O 得到的腐植酸芳香度最高，Na2SO3 得到的腐植酸羟基数目较多。NaHCO3 产生的腐殖酸具有最多的脂肪醚和最低的芳香度。Na2CO3 是从泥炭中分离腐殖酸的最佳萃取剂，其含量最高，芳香聚合度最低，羧酸数量最多。

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Spectroscopic Analysis of the Effects of Alkaline Extractants on Humic Acids Isolated from Herbaceous Peat

To study the effect of various extractants on the structure of peat humic acid, peat humic acid was extracted using NH3·H2O, Na2CO3, NaHCO3, and Na2SO3 via alkali-extraction and acid-precipitation methods. The extracted peat humic acid was characterized using ultraviolet−visible (UV-vis) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, and fluorescence (FL) spectroscopy. The results showed that the extractants had negligible effects on the content of peat humic acids. Na2CO3 was found to be the most effective extractant for isolating humic acids from peat, with the highest content of 66.20% and a yield of 32.67%. Moreover, among the extractants used, NH3·H2O resulted in humic acids with the highest aromaticity, and Na2SO3 yielded humic acids with higher number of hydroxyl groups. NaHCO3 yielded humic acids with the most aliphatic ether and lowest aromaticity. Na2CO3 was the best extractant for isolating humic acids from peat, having the highest content, lowest degree of aromatic polymerization, and highest number of carboxylic acids.

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来源期刊

Spectroscopy 物理-光谱学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Spectroscopy welcomes manuscripts that describe techniques and applications of all forms of spectroscopy and that are of immediate interest to users in industry, academia, and government.