Effect of Strong Acids on the Spectral Characteristics of Humic Acid Extracted from Biomethane Fermentation Peat Residue

Shenguang Sun; Yanan Lu; Litong MaYing WangLiping Li

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Effect of Strong Acids on the Spectral Characteristics of Humic Acid Extracted from Biomethane Fermentation Peat Residue

机译：Effect of Strong Acids on the Spectral Characteristics of Humic Acid Extracted from Biomethane Fermentation Peat Residue

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Abstract To extend the peat utilization chain, and combine peat biomethane production with humic acid extraction, the effect of the spectral characteristics of humic acid extracted using strong acids from biomethane fermentation peat residue was investigated. The humic acid structures were characterized by Fourier transform infrared spectroscopy, fluorescence spectroscopy, and ultraviolet-visible spectroscopy (UV-vis). Fourier transform infrared results showed that the humic acid samples obtained through precipitation with different strong acids were different from the humic acid standard in terms of the functional group content. Fluorescence spectroscopy showed that the humic acid extracted by HNO3 and H3PO4 had a lower fused ring and a simple molecular structure. In addition, the humic acid precipitated by HNO3 had the lowest E4/E6 ratio and highest molecular weight, along with an aromatic structure. The results showed that HNO3 is the best strong acid for the extraction of humic acid from biomethane fermentation peat residue by alkali extraction and acid precipitation.

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来源
《Solid fuel chemistry》 |2023年第3期|209-214|共6页
作者
Shenguang Sun; Yanan Lu; Litong MaYing WangLiping Li;
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作者单位

School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology;

School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology||Inner Mongolia Engineering Research Center of Comprehensive Utilization of Bio-coal Chemical Industry||Laboratory of Low Rank Coal Carbon Neutralization, Inner Mongolia University of Science and Technology;

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正文语种英语
中图分类燃料化学工业（总论）;
关键词
Peat; Humic acid; Spectroscopic characteristics; Biomethane fermentation; Acid precipitation;

Effect of Strong Acids on the Spectral Characteristics of Humic Acid Extracted from Biomethane Fermentation Peat Residue

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