Muyao Zhu, Zhen Liu, He Yang, Lulong Jiao, Jian Zhang
{"title":"复合溶液对煤微观结构及润湿特性的影响机理研究","authors":"Muyao Zhu, Zhen Liu, He Yang, Lulong Jiao, Jian Zhang","doi":"10.1007/s12665-025-12517-5","DOIUrl":null,"url":null,"abstract":"<div><p>The wettability of coal is a key factor influencing the efficiency of coal seam water injection and directly determines the effectiveness of dust control measures. This property is strongly governed by the physicochemical characteristics of the coal surface. To elucidate the effect of coal’s physical structure on its wettability, coal samples were treated with composite solutions of varying concentrations. Low-temperature nitrogen adsorption experiments and scanning electron microscopy were employed to quantitatively characterize the surface morphology and pore structure of the treated coal. The potential impact of structural variations on wetting behavior was investigated at the microscale. The results show that with the increase of solution concentration, the internal connectivity of coal is gradually enhanced, and the surface roughness and porosity of coal are also increased, from the original coal sample 0.0757 and 0.0851 to 0.1891 and 0.3045. In addition, after treatment with the composite solution, the two-dimensional fractal dimension (<i>D</i>) of coal gradually grew, increase from 1.642 to 1.588 to 1.814 and 1.869. While the three-dimensional <i>D</i> gradually shrunk, decrease from 2.73 to 2.546 to 2.667 and 2.533. The experiments showed that the smaller the three-dimensional <i>D</i> was, the stronger the coal wettability was. For the coal surface, when the proportion of the coal pore area was larger (i.e., two-dimensional <i>D</i> was larger), the stronger the coal wettability was. The results provide a theoretical basis for dust control.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 18","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Study on mechanism of influence of composite solution on microstructure and wetting characteristics of coal\",\"authors\":\"Muyao Zhu, Zhen Liu, He Yang, Lulong Jiao, Jian Zhang\",\"doi\":\"10.1007/s12665-025-12517-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The wettability of coal is a key factor influencing the efficiency of coal seam water injection and directly determines the effectiveness of dust control measures. This property is strongly governed by the physicochemical characteristics of the coal surface. To elucidate the effect of coal’s physical structure on its wettability, coal samples were treated with composite solutions of varying concentrations. Low-temperature nitrogen adsorption experiments and scanning electron microscopy were employed to quantitatively characterize the surface morphology and pore structure of the treated coal. The potential impact of structural variations on wetting behavior was investigated at the microscale. The results show that with the increase of solution concentration, the internal connectivity of coal is gradually enhanced, and the surface roughness and porosity of coal are also increased, from the original coal sample 0.0757 and 0.0851 to 0.1891 and 0.3045. In addition, after treatment with the composite solution, the two-dimensional fractal dimension (<i>D</i>) of coal gradually grew, increase from 1.642 to 1.588 to 1.814 and 1.869. While the three-dimensional <i>D</i> gradually shrunk, decrease from 2.73 to 2.546 to 2.667 and 2.533. The experiments showed that the smaller the three-dimensional <i>D</i> was, the stronger the coal wettability was. For the coal surface, when the proportion of the coal pore area was larger (i.e., two-dimensional <i>D</i> was larger), the stronger the coal wettability was. The results provide a theoretical basis for dust control.</p></div>\",\"PeriodicalId\":542,\"journal\":{\"name\":\"Environmental Earth Sciences\",\"volume\":\"84 18\",\"pages\":\"\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2025-09-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Earth Sciences\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s12665-025-12517-5\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Earth Sciences","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s12665-025-12517-5","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Study on mechanism of influence of composite solution on microstructure and wetting characteristics of coal
The wettability of coal is a key factor influencing the efficiency of coal seam water injection and directly determines the effectiveness of dust control measures. This property is strongly governed by the physicochemical characteristics of the coal surface. To elucidate the effect of coal’s physical structure on its wettability, coal samples were treated with composite solutions of varying concentrations. Low-temperature nitrogen adsorption experiments and scanning electron microscopy were employed to quantitatively characterize the surface morphology and pore structure of the treated coal. The potential impact of structural variations on wetting behavior was investigated at the microscale. The results show that with the increase of solution concentration, the internal connectivity of coal is gradually enhanced, and the surface roughness and porosity of coal are also increased, from the original coal sample 0.0757 and 0.0851 to 0.1891 and 0.3045. In addition, after treatment with the composite solution, the two-dimensional fractal dimension (D) of coal gradually grew, increase from 1.642 to 1.588 to 1.814 and 1.869. While the three-dimensional D gradually shrunk, decrease from 2.73 to 2.546 to 2.667 and 2.533. The experiments showed that the smaller the three-dimensional D was, the stronger the coal wettability was. For the coal surface, when the proportion of the coal pore area was larger (i.e., two-dimensional D was larger), the stronger the coal wettability was. The results provide a theoretical basis for dust control.
期刊介绍:
Environmental Earth Sciences is an international multidisciplinary journal concerned with all aspects of interaction between humans, natural resources, ecosystems, special climates or unique geographic zones, and the earth:
Water and soil contamination caused by waste management and disposal practices
Environmental problems associated with transportation by land, air, or water
Geological processes that may impact biosystems or humans
Man-made or naturally occurring geological or hydrological hazards
Environmental problems associated with the recovery of materials from the earth
Environmental problems caused by extraction of minerals, coal, and ores, as well as oil and gas, water and alternative energy sources
Environmental impacts of exploration and recultivation – Environmental impacts of hazardous materials
Management of environmental data and information in data banks and information systems
Dissemination of knowledge on techniques, methods, approaches and experiences to improve and remediate the environment
In pursuit of these topics, the geoscientific disciplines are invited to contribute their knowledge and experience. Major disciplines include: hydrogeology, hydrochemistry, geochemistry, geophysics, engineering geology, remediation science, natural resources management, environmental climatology and biota, environmental geography, soil science and geomicrobiology.