Shenguang Sun, Yanan Lu, Litong Ma, Ying Wang, Liping Li
{"title":"强酸对生物甲烷发酵泥炭渣腐植酸光谱特性的影响","authors":"Shenguang Sun, Yanan Lu, Litong Ma, Ying Wang, Liping Li","doi":"10.3103/S0361521923010135","DOIUrl":null,"url":null,"abstract":"<p>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 HNO<sub>3</sub> and H<sub>3</sub>PO<sub>4</sub> had a lower fused ring and a simple molecular structure. In addition, the humic acid precipitated by HNO<sub>3</sub> had the lowest <i>E</i><sub>4</sub>/<i>E</i><sub>6</sub> ratio and highest molecular weight, along with an aromatic structure. The results showed that HNO<sub>3</sub> is the best strong acid for the extraction of humic acid from biomethane fermentation peat residue by alkali extraction and acid precipitation.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of Strong Acids on the Spectral Characteristics of Humic Acid Extracted from Biomethane Fermentation Peat Residue\",\"authors\":\"Shenguang Sun, Yanan Lu, Litong Ma, Ying Wang, Liping Li\",\"doi\":\"10.3103/S0361521923010135\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>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 HNO<sub>3</sub> and H<sub>3</sub>PO<sub>4</sub> had a lower fused ring and a simple molecular structure. In addition, the humic acid precipitated by HNO<sub>3</sub> had the lowest <i>E</i><sub>4</sub>/<i>E</i><sub>6</sub> ratio and highest molecular weight, along with an aromatic structure. The results showed that HNO<sub>3</sub> is the best strong acid for the extraction of humic acid from biomethane fermentation peat residue by alkali extraction and acid precipitation.</p>\",\"PeriodicalId\":779,\"journal\":{\"name\":\"Solid Fuel Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.8000,\"publicationDate\":\"2023-08-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Solid Fuel Chemistry\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.3103/S0361521923010135\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solid Fuel Chemistry","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.3103/S0361521923010135","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Effect of Strong Acids on the Spectral Characteristics of Humic Acid Extracted from Biomethane Fermentation Peat Residue
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.
期刊介绍：
The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.
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