Extraction and Characterization of Humic Acid Based on Coal Mining Waste

Nazarbek, Ulzhalgas; Raiymbekov, Yerkebulan

doi:10.1002/ceat.202200038

Cited by 7 publications

(2 citation statements)

References 36 publications

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“…The mechanical energy crushed the condensed HA, the macromolecules were broken up and decomposed, and the originally stacked aromatic layer was destroyed by the tangential force [37]. (2) The infrared spectral results of HA [38,39] are shown in Figure 7. The vibration peak at 3434 cm −1 is a large number of free and hydrogen bonded OH groups; the peak intensity is high, indicating that the HA is rich in hydroxyl groups; and the intensity of the peaks of the two HAs is basically the same: 3000-2700 cm −1 belongs to the fat region, the peaks at 2922 cm −1 and 2850 cm −1 are CH2 asymmetric and symmetric telescopic vibration, respectively, and the peaks of the two HAs are not shifted and the intensity is basically the same; 1950-1800 cm −1 is the carbonyl C=O vibration, presumably a carboxylic acid or ketone, and the intensity of the peaks of the activated HA is stronger than that of the activated one.…”

Section: Performance Analysis Of Hamentioning

confidence: 99%

Preparation of Humic Acid from Weathered Coal by Mechanical Energy Activation and Its Properties

Feng,

Xiao,

Condé

et al. 2024

Minerals

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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 guarantee for HA extraction and utilization. At present, the activation side of weathered coal is still the main technical difficulty that restricts HA extraction. In this study, the weathered coal from Inner Mongolia was used as the raw material, and the mechanical energy was used to activate the weathered coal through a planetary ball mill, which improved the extraction rate of HA and optimized the molecular structure and composition of HA. The effects of four parameters, namely, ball material ratio, ball milling time, ball milling speed, and ball size, on the free HA content of weathered coal were investigated, the HA was extracted by alkaline extraction method, and the activated weathered coal and the extracted HA were characterized. The results showed that a ball material ratio of 9:1, a ball milling speed of 200 r/min, a ball milling time of 200 min, a milling ball size of Ф5:Ф10:Ф15 = 48:42:45 and 56:42:37 are the optimal parameters for the mechanical energy activation, and the HA extraction rate of activated weathered coal under these conditions reached 82.3%, which was 15% higher than that of the unactivated one. Moreover, the aroma of the ball-milled weathered coal increased, the content of oxygenated functional groups increased, and the molecular weight and aroma of HA increased. This provides scientific theoretical guidance for the preparation of HA with high aromaticity and large molecular weight from weathered coal.

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Section: Performance Analysis Of Hamentioning

confidence: 99%

Preparation of Humic Acid from Weathered Coal by Mechanical Energy Activation and Its Properties

Feng,

Xiao,

Condé

et al. 2024

Minerals

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“…These particles are captured by the special part in the filters then discharged into the storage area (Figure 1). As a result of thermal treatment of phosphate ore, about 150-160 kg of cottrel dust is formed per 1 ton of yellow phosphorus at the phosphorus plant [5][6][7]. Accumulated industrial waste heavily pollutes the environment and has a direct impact on all living things.…”

Section: Introductionmentioning

confidence: 99%

Methods for Obtaining Phosphorus-Containing Fertilizers Based on Industrial Waste

Ismailov

Zakirov²,

Kadirbayeva

et al. 2023

Inorganics

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This article discusses the method of obtaining phosphorus-containing components from cottrel dust from the industrial wastes of the New-Jambul phosphorus plant. Accumulated industrial waste heavily pollutes the environment and has a direct impact on all living things. Therefore, their processing is of special interest for the state and grant programs have been allocated in order to obtain new valuable substances. In order to solve these problems, a number of experimental works have been carried out to study the chemical and mineralogical composition and chemical structures during the heat treatment of cottrel dust—the waste of phosphorus production. The optimal parameters of the process of obtaining mono-calcium phosphate from cottrel dust were determined and the process of crystallization of mono-calcium phosphate was studied. A method has been developed for obtaining a phosphorus-containing fertilizer based on cottrel dust from the industrial waste of the New-Jambul phosphorus plant by means of sulfuric acid solutions. The advantage of the resulting phosphorus-containing fertilizer is that it has a high solubility and digestibility of phosphorus plants. They are also high in phosphorus-containing substances that ensure the growth and yield of agricultural plants. The developed method for obtaining phosphorus-containing fertilizers is aimed at reducing the accumulated industrial waste, which in turn allows you to regulate and improve the environmental situation in the region.

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Parametric optimization and structural feature analysis of humic acid extraction from lignite

Rashid

Sher

Jusoh

et al. 2023

Environmental Research

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Extraction and Characterization of Humic Acid Based on Coal Mining Waste

Cited by 7 publications

References 36 publications

Preparation of Humic Acid from Weathered Coal by Mechanical Energy Activation and Its Properties

Preparation of Humic Acid from Weathered Coal by Mechanical Energy Activation and Its Properties

Methods for Obtaining Phosphorus-Containing Fertilizers Based on Industrial Waste

Parametric optimization and structural feature analysis of humic acid extraction from lignite

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