Geosystem Engineering最新文献

{"title":"The effect of ultrasound on the sulfuric acid leaching of uranium by use of MnO2 as a oxidant","authors":"K. Chung, Ho-Sung Yoon, Chul-Joo Kim, Hoseok Jeon","doi":"10.1080/12269328.2022.2074148","DOIUrl":"https://doi.org/10.1080/12269328.2022.2074148","url":null,"abstract":"ABSTRACT The paper reported sonochemical leaching of uranium from black shale in Fe2+-containing sulfuric acid solution of pH 2 using MnO2 as an oxidant. Ultrasound enhanced uranium leaching at the initial time but suppressed it over a prolonged time. In addition, the amount of MnO2-input was increased for ultrasonic leaching than conventional leaching at the same time. It was understood that ultrasonic leaching conditions should be optimized to achieve a positive effect. Faster leaching of uranium and reduced consumption of MnO2 could be found under the optimum condition of leaching up to ca. 85% at the sonication power of 25 W.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"287 - 292"},"PeriodicalIF":1.7,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42856064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feasibility of pilot-scale disc-donut column for continuous cadmium extraction with the perspective of droplet size distribution","authors":"M. Asadollahzadeh, R. Torkaman, M. Torab‐Mostaedi, A. Heydari","doi":"10.1080/12269328.2021.2008274","DOIUrl":"https://doi.org/10.1080/12269328.2021.2008274","url":null,"abstract":"ABSTRACT Heavy metal removal is a significant problem in various industries. Liquid-liquid extraction is a practical process in recovering these elements. In this study, the behavior of pilot-scale disc-donut column in the extraction of cadmium ions was evaluated. The effects of droplets with the variation size distributions are significant in describing performance and characteristics of an extractor for removing the substrate from aqueous or organic phases. The size distribution of droplets is relative to the interfacial area under steady conditions. To match the size distribution of droplets, the experiments are carried out in reaction and non-reaction conditions. In emulsion regime (pulsing intensity (Af), inlet organic and aqueous phase flow rate (Vc, Vd) equal to 3.3 cm/s, 2.22 mm/s, and 2.22 mm/s, respectively) and under the optimized conditions, 99.7% of the cadmium can be recovered from the aqueous solution. It was found that Weibull distribution gives the best fit at each operation mode while inverse Gaussian distribution gives the most inferior fit. According to a series of statistical analyses, it is shown that the pulsation intensity imposed more influence on drop sizes, and superficial flow rates of both phases are less able to the successful prediction of size distribution of droplets.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"265 - 274"},"PeriodicalIF":1.7,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42204268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geomechanical analysis from well log for brownshale hydrocarbon development in the Bengkalis Trough, Central Sumatra Basin, Indonesia","authors":"A. Buntoro, C. Prasetyadi, R. A. Wibowo, A. M. Suranto","doi":"10.1080/12269328.2021.2002199","DOIUrl":"https://doi.org/10.1080/12269328.2021.2002199","url":null,"abstract":"ABSTRACT Geomechanical analysis using well log can be used to determine the fracable zone. Fracability is a parameter applied in the development of shale hydrocarbon to overcome the weaknesses in determining the fracable zone which was previously only based on high brittleness and considered a good hydraulic fracking candidate. The fracability model from the results of geomechanical analysis is used as the basis for hydraulic fracking planning for the development of Brownshale hydrocarbon in the Bengkalis Trough area, as a case study. Therefore, it has good development prospects. The geomechanical analysis of well BS-03, is the only well that penetrated the Brownshale formation. The geomechanical parameters investigation consists of Young’s modulus, Poisson’s ratio, unixial compressive strength, brittleness index, and the fracability index. Therefore, the fracability model is built by correlating the depth interval of the Brownshale formation and the geomechanical parameters, in order to determine the Brownshale formation interval as the basis for the location selection process and the hydraulic fracking interval. The results of geomechanical analysis show an interesting phenomenon in the fracability index, with negative and positive depth intervals at the top and bottom, respectively. The upper and lower depth intervals represent fracture barrier and fracable zone interval. Abbreviations vp: primary wave velocity (km/sec); vs: secondary wave velocity (km/sec); ρ: rock density (g/cc); E: Young’s Modulus (MPa); υ: Poisson’s ratio (dimensionless); UCS: unconfined compressive strength, MPa; Vp: primary wave velocity (km/sec) where; Ebrittleness: Young’s modulus of brittleness, fraction; Emin: Minimum Young’s modulus, MPa; Emax: Maximum Young’s modulus, MPa; FI: Fracability index, fraction; Bn: Brittleness normalization, fraction; En: Young’s Modulus normalization, fraction; B: Brittleness at analyzed depth, fraction; Bmin: Minimum brittleness in the formation was investigated, fraction; Bmax: Maximum brittleness in the formation was investigated, fraction; β: Biot’s effective stress constant; Bc: Skempton’s coefficient","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"256 - 264"},"PeriodicalIF":1.7,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49656505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling of micro-annulus propagation along cementing interface in stimulated horizontal wellbore","authors":"Yan Yan, Z. Guan, Weijun Yan","doi":"10.1080/12269328.2021.1978109","DOIUrl":"https://doi.org/10.1080/12269328.2021.1978109","url":null,"abstract":"ABSTRACT Once there are micro-annulus at cementing interfaces in the process of reservoir stimulation, it is easy to form fluid channeling in the later development. Fluid channeling reduces the efficiency of reservoir development and even the service life of oil and gas wells. Based on the characteristics of ‘multi-stage’ in stimulated reservoir volume, a mathematical model was set up to calculate the interface debonding length driven by hydraulic pressure. The propagation process of micro-annulus in stimulated reservoir volume was also analyzed. The results show that the propagation speed of the micro-annulus gradually slows down with the progress of fracturing. Meanwhile, the debonding azimuth of the micro-annulus and the cement elastic modulus have dominant effects on the propagation length. It is recommended that the setting position of the packer be outranged from the debonding area of the cementing interface in the design of the stimulated reservoir volume scheme to avoid fluid channeling between the stages. This study can predict the unsealing length of cement sheath during hydraulic fracturing as a reference for the optimization of fracturing parameters.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"247 - 255"},"PeriodicalIF":1.7,"publicationDate":"2021-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45225417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase formation behavior of alkali-activated calcined clays: effects of the reactive phase and NaOH concentration","authors":"N. Rakhimova, V. Morozov, A. Eskin","doi":"10.1080/12269328.2021.1961615","DOIUrl":"https://doi.org/10.1080/12269328.2021.1961615","url":null,"abstract":"ABSTRACT The relevance of calcined clays as sources with a great potential for non-clinker alkali-activated materials has significantly increased in recent decades. This article reports on a study to investigate how NaOH with concentrations in the 5–14 M range affects the mechanical properties, amorphous-crystalline phase transformations, and reaction product composition of alkali-activated calcined kaolinite/montmorillonite cements with reactive phases of 60% and 33%, and with the SiO2/Al2O3 ratios of 1.54 and 1.74. The hardened pastes based on both calcined clays exhibited the highest compressive strength up to 9.1 MPa following their activation with 8 M NaOH. The higher amorphous fraction in the calcined clay provided gradual zeolitisation/crystallisation at Na2O/SiO2 and Na2O/Al2O3 molar ratios in the 0.36–0.63 and 0.56–0.98 ranges, respectively, accompanied by the deterioration of the mechanical characteristics of the samples. The zeolite content in the alkali-activated calcined clay cements with an amorphous fraction of 33% peaked for NaOH at 11 M, and the corresponding molar ratios of Na2O/SiO2 and Na2O/Al2O3 were 0.85 and 1.46, respectively. The main reaction products in the studied systems determined by XRD, TG/DSC, and FTIR spectroscopy analyses were N-A-S-H and zeolite A. The properties and reaction products obtained favor the use of proposed alkali-activated cements for controlled low-strength materials.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"238 - 246"},"PeriodicalIF":1.7,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47085087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Neutralization of acidic soil using Myxococcus xanthus: Important parameters and their implications","authors":"Min-Ki Cho, S. Park, Eunyoung You, Chang-gyun Kim","doi":"10.1080/12269328.2021.1947901","DOIUrl":"https://doi.org/10.1080/12269328.2021.1947901","url":null,"abstract":"ABSTRACT Soil acidification through acid rain/deposition has been a serious problem that adversely affects the soil environment. In this study, Myxococcus xanthus, myxobacteria, was assessed towards neutralization of artificial acidic soil. Differences in initial pH and peat moss content in soil with incubated M. xanthus were being compared using a one-variable-at-a-time approach. It showed that the M. xanthus could neutralize the acidified soil using their specific metabolism, producing ammonium ions and hydroxide simultaneously. Increasing peat moss content could direct the neutralization performance of M. xanthus towards inhibition whereas reducing the peat moss content could improve the neutralization performance. Among experimental parameters such as initial pH, peat moss content in soil, and microorganism concentration, the interaction of soil amount either with peat moss content or microbial population density was meaningfully correlated to the neutralization of acidic soil.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"180 - 187"},"PeriodicalIF":1.7,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2021.1947901","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44316899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grinding characteristics of waste printed circuit boards in hammer mill using population balance model","authors":"Wonjae Lee, Seungsoo Park, Jai-koo Park","doi":"10.1080/12269328.2021.1942235","DOIUrl":"https://doi.org/10.1080/12269328.2021.1942235","url":null,"abstract":"ABSTRACT In this study, the grinding characteristics of waste printed circuit boards (PCBs) were evaluated using a population balance model (PBM). The grinding characteristics under various conditions (hammer rotational speeds of 1600, 2000, and 2400 rpm; screen aperture sizes of 0.71, 1.0, and 1.40 mm; and maximum feed sizes of 4, 6, and 8 mm) were identified. A PBM for a continuous hammer mill was used to quantitatively demonstrate the grinding characteristics. No significant difference was observed in the particle sizes of the products for various hammer rotational speeds. Nevertheless, the specific rate of breakage increased with the hammer rotational speed. As expected, a narrow screen aperture yielded a fine product. The mean residence time was increased in this case to comminute the particles to a finer size. Furthermore, a finer feed was predicted to yield a finer product; however, a coarser feed was observed to yield such a product instead. Each hammer milling condition should be controlled with respect to the hammer milling performance and target particle size of the product.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"173 - 179"},"PeriodicalIF":1.7,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2021.1942235","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48746449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of reservoir properties on the heat extraction performance in multi-well production EGS","authors":"Songze Liu, J. Wei, Hongliang Liu, Xuemei Liu, Bingxu Yan","doi":"10.1080/12269328.2021.1949756","DOIUrl":"https://doi.org/10.1080/12269328.2021.1949756","url":null,"abstract":"ABSTRACT A multi-well production enhanced geothermal system (EGS) with discrete fracture network is designed for heat extraction in this study. A thermal-hydraulic numerical simulation model is established, and the effect of reservoir properties on heat extraction is investigated. The results show that the growth rate of heat extraction efficiency will decrease as the mining time increases. The initial reservoir temperature has a positive correlation with average production temperature which provides a broad space for the use of extracted thermal energy. The variation of initial reservoir pressure has little effect on the heat extraction performance. A higher matrix permeability leads to a higher average production temperature and heat extraction ratio which prompts more working fluid flow into the matrix, the heat transfer process is enhanced. Under the conditions of this study, the preferred initial reservoir temperature is 493.15 K, the matrix permeability is 10−14m2.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"188 - 195"},"PeriodicalIF":1.7,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43804740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trace elements geochemistry of the Golbanoo coal basin, Iran","authors":"K. Pazand","doi":"10.1080/12269328.2021.1914751","DOIUrl":"https://doi.org/10.1080/12269328.2021.1914751","url":null,"abstract":"ABSTRACT The Jurassic coal deposit in the Golbanoo area contains coal seams with thickness ranges from 5 cm to 1 m and is underlain and overlain by thin coaly shale, sandstone and siltstone beds. This study reports on the geochemical features of coals and non-coal rocks based on the 30 channel samples were collected and analyzed for trace elements using neutron activation analysis (INAA) and for major elements by X-ray fluorescence. The Al2O3, SiO2 and Fe2O3 concentrations are the main oxides. The amounts of trace elements (As, Ag, Br, Sb, Cr, Co, Sr, Zn, Ta, and ∑REE) in Golbanoo coal are high compared to world types of coal. The volcanic activity and their sulfide mineralization in study area is a favorable factor for accumulation of trace element in coal layers.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"196 - 205"},"PeriodicalIF":1.7,"publicationDate":"2021-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2021.1914751","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48030230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of blending and production processes considering origin mines and metallurgical units using linear programming rules","authors":"M. Farghaly, Mahrous A. M. Ali, Jong-Gwan Kim","doi":"10.1080/12269328.2021.1910574","DOIUrl":"https://doi.org/10.1080/12269328.2021.1910574","url":null,"abstract":"ABSTRACT This paper discusses a model that can optimize plant operation by considering transportation cost and metallurgical assays. All boundary conditions were set using ore samples taken from different locations in the same mine. Transportation from the mine to milling plants, dumping areas, and leaching units is also analyzed. Transportation from the mill to the smelter depends on assay results to ensure market readiness. We hypothesize that the grade of the material varies according to its source because milling plants are built to process different types of ore. Mines and processing units may be far apart, and therefore, it is critical to optimize production. Previous studies have discussed mine production optimization but did not consider metallurgical plants. The proposed model merges all units of a production system to determine the optimal planning solution. Linear programming uses network formulations of planning problems to consider a combination of mining and metallurgy operations. This technology is useful for analyzing the combination of two major systems, and hence, the dual theory was used in formulating the problem. The final model was applied to minimize the costs of production and distribution. The study checked the optimality of the solution for accuracy and its use as an indicator for long-term planning.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"115 - 121"},"PeriodicalIF":1.7,"publicationDate":"2021-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2021.1910574","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46196595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}