The raw material used in the extraction of humic acid (HA) was the subbituminous coal from Candiota mine (southern of Brazil), with mean diameter of …
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Humic substances (HS), as important environmental components, are essential to soil health and agricultural sustainability. The usage of low-rank coal (LRC) for energy generation has declined ...
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Humic acids (HA) of coal, as a group of natural substances, have much in common with natural humus as far as the character of their structure is concerned. There are no principal differences between the humic acid of soils, though there are differences in the structural details as their formation depends on bioclimatic factors, stage of ...
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Humic acid (HA) is rich in functional groups with high activity, which can effectively improve the soil environment. The large reserves of weathered coal in China provide sufficient raw material ...
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The sorption behaviour of divalent cations M 2+ (Cu, Pb and zn) and trivalent cations M 3+ (Fe, Al) with humic acid isolated from oxidized coal (Hazro,se Anatolia,Turkey) was followed in aqueous solution. Coal humic acid and metal ion interaction was investigated with special emphasis on the effects of pH, metal ion concentration and humic acid …
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Humic & fulvic acid restrict toxins present in soil, reducing the amount of harmful substances that reach crop roots. Read on to learn the power of humates. ... the primary organic components of coal, soil and peat. Humic substances: The main organic component of soil, contains humic acids, fulvic acids and humins. Humic acids: ...
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Humic acid (HA) is rich in functional groups with high activity, which can effectively improve the soil environment. The large reserves of weathered coal in China provide sufficient raw material …
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To make humic acid from coal, you need to use the alkaline extraction method. This involves crushing the coal and treating it with an alkaline solution, followed by neutralization with an acid. The resulting humic acid is then filtered, washed, and dried to create a fine powder.
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Humic acid obtained from coal mining waste from the Lenger deposit was studied. Potassium humates were extracted from the raw material using potassium hydroxide. Hydrochloric acid at various …
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Keywords: high-energy ball milling; mechanical energy; weathered coal; activation; alkali dissolution; acid precipitation method; humic acid 1. Introduction Humic acid (HA) is an organic substance rich in functional groups, with a complex structure and variable molecular weight [], which can be used in a variety of fields, such
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Humic acids derived from Chinese weathered coal were oxidized with hydrogen peroxide (H2O2) under various conditions, and their chemical composition and structure were examined. The raw material humic acids (HA) and oxidized humic acids (OHAs) were characterized by elemental analysis and ultraviolet visible (UV-Vis), …
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The derived humic acid from native coal and nitric acid treated coal was analyzed using elemental analysis, E4/E6 ratio of absorbance at 465 nm and 665 nm using UV-Visible spectrophotometry and Fourier transformed infrared spectroscopy FTIR. The chemical characteristics of coal treated with nitric acid have shown increased molecular weight …
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Currently, conversion of coal into alternative fuel and non-fuel valuable products is in demand and growing interest. In the present study, humic acid was extracted from two different ranks of coal, i.e., …
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Five coal samples obtained from Chinese coal-producing areas were oxidized by hydrogen peroxide (H2O2), and humic acids (HAs) were derived from …
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The yield of extracted humic acid from coal is inversely proportional to the rank of coal. Since, majority of Pakistani coals are of low rank, extraction of humic acid from indigenous coal may be one of the non-fuels uses of coal. Three different coal sample from Thar, Dukki and Chamalong coalfields were treated with 3% H2O2 solution for ...
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DOI: 10.1016/j.fuel.2020.118301 Corpus ID: 224967874; Evaluation of humic acids produced from Pakistani subbituminous coal by chemical and fungal treatments @article{Sabar2020EvaluationOH, title={Evaluation of humic acids produced from Pakistani subbituminous coal by chemical and fungal treatments}, author={Muhammad …
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In conclusion, humic acid improved the yield and quality of continuous cropping peanut because of improved physicochemical properties, enzymatic activities, and microbial diversity of soil, which ...
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The isolated coal-derived humic acid is found to be high degree of humifications and relatively stable up to about 200 °C. The FTIR study indicates the formation of metal-humic acid complexes.
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All the obtained results are compared with the standard humic acid and examined the formation of humic acid from the coal. The isolated coal-derived humic acid is found to be high degree of ...
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DOI: 10.1016/J.FUPROC.2015.09.025 Corpus ID: 98655291; Oxygen-rich and hierarchical porous carbons prepared from coal based humic acid for supercapacitor electrodes @article{Huang2016OxygenrichAH, title={Oxygen-rich and hierarchical porous carbons prepared from coal based humic acid for supercapacitor electrodes}, author={Guangxu …
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Coal gangue (CG), one of the world's largest industrial solid wastes produced during coal mining, is extremely difficult to be used owing to its combined contents of clay minerals and organic macromolecules. This study explored a novel process of degrading the harmful organic compounds in the CG into humic acid using a biological method …
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Humic acids (HAs) are high molecular weight biopolymers generally obtained from humic compounds of organic matter distributed in the soil, peats and sapropels, natural waters, low rank coals, leonardite and lignite coals (Savel'eva et al., 2015, 2017; Huculak-Mączka et al., 2018; Fuentes et al., 2018)mercial HAs are …
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We studied the humic-acid fraction isolated from a Spanish leonardite coal (Torrelapaja, Cretaceous basin belonging to the Utrillas facies) using a suite of chromatographic and spectroscopic techniques to characterize the structure of the carbon skeleton and the nature of the sulfur-containing compounds.
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Humic acid improves plant tolerance against ROS under drought conditions via a mechanism similar to that of phytohormones, ... Effects of fractions of coal-derived humic substances on seed germination and growth of seedlings (Lactuga sativa and Lycopersicum esculentum) Biol Fert Soils, 16 (1993), pp. 11-15.
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What Is Humic Acid? Humic and Fulvic acids are the final break-down constituents of the natural decay of plant and animal materials. These organic acids are found in pre-historic deposits. Humic matter is formed through the ... a result of the process of coal formation, and has no value as fuel. The decomposition
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Download Citation | Humic acid coupled with coal gasification slag for enhancing the remediation of Cd-contaminated soil under alternated light/dark cycle | In this study, the synthesis of a coal ...
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humic acids [29, 30]. The main hindrance to the large-scale use of humic acids is the absence of developed and implemented nonwaste technologies for the pro-duction of humic acids with the almost complete con-version of the organic matter of coal (OMC) into humic acids and the reasonable use of the mineral component of coals.
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FAQ: Top 10 Questions About Humic Acid. Questions abound about humic acid, and the science is constantly changing. ... Too much of those components can lead to the formation of anthracite coal, a hard, shiny substance which is used for energy but is not beneficial as a soil amendment. So be sure to do your research, and go with products that ...
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The Fe3O4/LaNiO3 composite, synthesised with the sol-gel method, is considered to be an excellent nanocatalyst for the production of high value-added humic acids from oxidised weathered coal under solid phase milling process conditions. Under optimum process conditions (1% catalyst, 10% activator, 60 min grinding), 48.4% of the …
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DOI: 10.1016/J.JMRT.2017.08.008 Corpus ID: 25362015; Extraction and characterization of humic acid from coal for the application as dispersant of ceramic powders @article{Souza2017ExtractionAC, title={Extraction and characterization of humic acid from coal for the application as dispersant of ceramic powders}, author={Fabiana de …
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