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humic acid from coal

Characterization of humic acids from original coal and its ...
2021-7-28 · Five coal samples obtained from Chinese coal-producing areas were oxidized by hydrogen peroxide (H2O2), and humic acids (HAs) were derived from original coal and its oxidizition samples. HAs were ...
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(PDF) Humic acids from coal. Production, characterization ...
2021-12-29 · The specific capacitance of the isolated coal-derived humic acid via cyclic voltammetry and charge-discharge analysis is found to be 7 mF/g at scan rate 10 mV/s and 22 mF/g within the potential ...
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Characterization of humic acids from original coal and its ...
Introduction. Humic acids (HAs) is a mixture of natural amorphous colloid formed through various biological and abiotic degradation processes of animal and plant residues 1, which are featured by complex molecular structure, chemical composition, chemical reactivity and decomposition resistance 2.HAs widely exist in soil, coal and natural water body, and meanwhile their
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Extraction and characterization of humic acid from coal ...
2018-7-1 · Subbituminous coal was employed as raw material for the extraction of humic acid (HA) to be applied as ceramic dispersant. The extraction process is described in detail, showing it is a relatively simple procedure, which makes the production attractive and feasible on a laboratory scale.
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Humic Acids from Coal. Controlled Air-Oxidation of Coals ...
2019-5-25 · Quantum and statistical mechanical studies of liquids. 21. The nature of dilute solutions of sodium and methoxide ions in methanol; One-Day Construction of Multiplex Arrays to Harness Natural CRISPR-Cas Systems
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Humic acids from oxidized coals I. Elemental composition ...
The formation of humic acids (HAs) from bituminous coal was verified by laboratory oxidation. In a relatively short time the oxidation by air at temperature above 150 degrees C led to the formation of HAs. These HAs were compared with those isolated
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Coal-derived humic acid for application in acid mine ...
2021-6-16 · In this research work, isolation of humic acid from coal of Northeastern region of India is reported. The study is also targeted for application of the coal-derived humic acid in acid mine drainage (AMD) water treatment and electrochemical devices. All the obtained results are compared with the standard humic acid and examined the formation of humic acid from the
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On the artificial humic acids prepared from coal and ...
2018-6-28 · Preparation of Artificial Humic Acids (1) Coal humic acid: Four coals of various ranks were used, that is, Amakusa anthracite, Joban bituminous coal, Mogami brown coal, and Mogami lignite. 5 g of pulverized coal and 5 g of potassium chlorate were boiled in 100 ml of 1:4 nitric acid solution for 30 minutes.
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Extraction and characterization of humic acid from ...
2017-4-20 · ABSTRACT. This study deals with the extraction and characterization of humic acids from low rank coals of Thar, Chakwal, and Quetta. Three respective coal samples were initially oxidized with 2% HNO 3 and then treated with 2.5, 3, and 3.5% KOH solutions for the extraction of humic acid. The 3.5% concentration of KOH was found to be the optimum for the extraction
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Extraction and Chemical Characterization of Humic Acid ...
2021-8-11 · 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., low rank and high rank (lignite and bituminous), through chemical pretreatment by nitric acid. Samples of lignite and bituminous coal were subjected to nitric acid oxidation
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Characterization of humic acids from original coal and its ...
Introduction. Humic acids (HAs) is a mixture of natural amorphous colloid formed through various biological and abiotic degradation processes of animal and plant residues 1, which are featured by complex molecular structure, chemical composition, chemical reactivity and decomposition resistance 2.HAs widely exist in soil, coal and natural water body, and meanwhile their
Details
Humic Acids from Coal. Controlled Air-Oxidation of Coals ...
2019-5-25 · Quantum and statistical mechanical studies of liquids. 21. The nature of dilute solutions of sodium and methoxide ions in methanol; One-Day Construction of Multiplex Arrays to Harness Natural CRISPR-Cas Systems
Details
Humic acids from oxidized coals I. Elemental composition ...
The formation of humic acids (HAs) from bituminous coal was verified by laboratory oxidation. In a relatively short time the oxidation by air at temperature above 150 degrees C led to the formation of HAs. These HAs were compared with those isolated
Details
Effects of different types of humic acid isolated from ...
Humic acid can improve soil nutrients and promote plant growth. Weathered coal and lignite can be used as agricultural resources due to high humic acid content, but their impact on soil NH 3 volatilization and CO 2 emissions are yet to be determined. In this study, a field experiment was carried out to compare the effects of four types of humic acid isolated from coal (pulverized
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On the artificial humic acids prepared from coal and ...
2018-6-28 · Preparation of Artificial Humic Acids (1) Coal humic acid: Four coals of various ranks were used, that is, Amakusa anthracite, Joban bituminous coal, Mogami brown coal, and Mogami lignite. 5 g of pulverized coal and 5 g of potassium chlorate were boiled in 100 ml of 1:4 nitric acid solution for 30 minutes.
Details
(PDF) Extraction of humic acid from Lignite coals using ...
2019-11-17 · Extraction of humic acid from Lignite coals using stirred tank reactors (STRs): Assessment of operating parameters and final product characterization November 2019 DOI: 10.22059/ijswr.2018.260201 ...
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Biological production of humic acid and clean fuels from
1995-6-7 · Coal is treated aerobically or anaerobically to produce humic acid, volatile fatty acids, lower alcohols, and/or methane using a consortium of bacteria designated Mic-1 or KSARC56. This process can also be used to convert aromatic compounds, such as phenols and derivatives thereof, to methane and carbon dioxide.
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HUMIC ACID IN AGRICULTURE - gcic-global
2017-8-9 · Humic Acid comes from Leonardite which is a type of soft brown coal. It is usually found associated with lignite coal deposits. Leonardite has been produced over millions of years in the same way as coal, and contains all the natural products from prehistoric plant life.
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Method of production of concentrate of humic acid from ...
FIELD: agriculture. SUBSTANCE: invention relates to agriculture. The method of production of the concentrate of humic acid from brown coal, including its crushing to obtain microparticles, preparing the suspension in the diluted solution of alkali, and extraction, with mechanical stirring of the suspension in the reactor-mixer from the microparticles of humic acid coal.
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Critical Comparison of Humic Acid Test Methods
2021-6-24 · overestimated the humic acid content of the eight samples by 120% and 52%, respectively. Therefore, these procedures do not produce a reliably accurate value for the humic acid contents of humates and products produced using materials extracted from them. Keywords: Humic, humate, humic analysis, humate analysis, CDFA method, colorometric method
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Humic Acids from Coal. Controlled Air-Oxidation of Coals ...
2019-5-25 · Quantum and statistical mechanical studies of liquids. 21. The nature of dilute solutions of sodium and methoxide ions in methanol; One-Day Construction of Multiplex Arrays to Harness Natural CRISPR-Cas Systems
Details
On the artificial humic acids prepared from coal and ...
2018-6-28 · Preparation of Artificial Humic Acids (1) Coal humic acid: Four coals of various ranks were used, that is, Amakusa anthracite, Joban bituminous coal, Mogami brown coal, and Mogami lignite. 5 g of pulverized coal and 5 g of potassium chlorate were boiled in 100 ml of 1:4 nitric acid solution for 30 minutes.
Details
Structural characteristics of humic acids derived from ...
2019-5-31 · Humic acids from weathered coal may have good prospects and advantages, that are worthy of investigation [7]. Existing research has been directed at characterizing humic acids through their degradation into individual monomers using hydrolysis, reduction, oxidation etc [13–15]. Among all deg-
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Biological production of humic acid and clean fuels from
1995-6-7 · Coal is treated aerobically or anaerobically to produce humic acid, volatile fatty acids, lower alcohols, and/or methane using a consortium of bacteria designated Mic-1 or KSARC56. This process can also be used to convert aromatic compounds, such as phenols and derivatives thereof, to methane and carbon dioxide.
Details
Effects of different types of humic acid isolated from coal
2021-1-21 · Humic acid can improve soil nutrients and promote plant growth. Weathered coal and lignite can be used as agricultural resources due to high humic acid content, but their impact on soil NH 3 volatilization and CO 2 emissions are yet to
Details
Characterization of Ultrafiltration-Fractionated Humic ...
2021-10-9 · Weathered coal is a widely used raw material of farm-oriented humic acid in China, while the high heterogeneity impedes its sufficient utilization. In this study, we fractionated the humic acid derived from Chinese weathered coal by ultrafiltration, and three fractions with the molecular range of ≥100 kDa, 10–100 kDa, ≤10 kDa were obtained.
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Preparation and evaluation of humic acid–based
2021-10-16 · To mitigate environmental pollution caused by the escape of dust during coal storage and transportation, humic acid (HA) and grafted acrylamide (AM) were used as raw materials to prepare a composite dust suppressant suitable for coal storage and transportation. Single-factor experiments were used to explore the optimal synthesis conditions of the dust
Details
Method of production of concentrate of humic acid from ...
FIELD: agriculture. SUBSTANCE: invention relates to agriculture. The method of production of the concentrate of humic acid from brown coal, including its crushing to obtain microparticles, preparing the suspension in the diluted solution of alkali, and extraction, with mechanical stirring of the suspension in the reactor-mixer from the microparticles of humic acid coal.
Details
Method to produce humic acids and humates from peat
A method of obtaining humic acids from brown coal, including coal processing solution of alkali, low-frequency acoustic vibrations and cavitation vibration jets in the device, comprising a housing, a device for supply and removal of the interacting phases, working bodies and the vibration exciter [RF patent №2042422, CL 01N 61/00, 1995].
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Experimental Study on Extracting Humic Acid from Lignite ...
Humic acid has been extensively used in the fields like industry, agriculture, medicine, environment protection, etc. As a kind of potential organic resources that being developed and utilized, humic acid is drawing more and more attention from the world. China is abundant in coal resource; the lignite of China contains a lot of humic acid.
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Crawler type Mobile Crushing Plant

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humic acid from coal

Characterization of humic acids from original coal and its ...

(PDF) Humic acids from coal. Production, characterization ...

Characterization of humic acids from original coal and its ...

Extraction and characterization of humic acid from coal ...

Humic Acids from Coal. Controlled Air-Oxidation of Coals ...

Humic acids from oxidized coals I. Elemental composition ...

Coal-derived humic acid for application in acid mine ...

On the artificial humic acids prepared from coal and ...

Extraction and characterization of humic acid from ...

Extraction and Chemical Characterization of Humic Acid ...

Characterization of humic acids from original coal and its ...

Humic Acids from Coal. Controlled Air-Oxidation of Coals ...

Humic acids from oxidized coals I. Elemental composition ...

Effects of different types of humic acid isolated from ...

On the artificial humic acids prepared from coal and ...

(PDF) Extraction of humic acid from Lignite coals using ...

Biological production of humic acid and clean fuels from

HUMIC ACID IN AGRICULTURE - gcic-global

Method of production of concentrate of humic acid from ...

Critical Comparison of Humic Acid Test Methods

Humic Acids from Coal. Controlled Air-Oxidation of Coals ...

On the artificial humic acids prepared from coal and ...

Structural characteristics of humic acids derived from ...

Biological production of humic acid and clean fuels from

Effects of different types of humic acid isolated from coal

Characterization of Ultrafiltration-Fractionated Humic ...

Preparation and evaluation of humic acid–based

Method of production of concentrate of humic acid from ...

Method to produce humic acids and humates from peat

Experimental Study on Extracting Humic Acid from Lignite ...

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