Geosystem Engineering最新文献_第4页

Assessment of heavy metal pollution associated with tailing dam in gold mining area, southern ethiopia 埃塞俄比亚南部金矿区尾矿坝重金属污染评价

IF 1.7

Geosystem Engineering Pub Date : 2022-12-26 DOI: 10.1080/12269328.2022.2160833

Gera Techane, G. Sahilu, Lena Alakangas, W. Mulat, H. Kloos

{"title":"Assessment of heavy metal pollution associated with tailing dam in gold mining area, southern ethiopia","authors":"Gera Techane, G. Sahilu, Lena Alakangas, W. Mulat, H. Kloos","doi":"10.1080/12269328.2022.2160833","DOIUrl":"https://doi.org/10.1080/12269328.2022.2160833","url":null,"abstract":"ABSTRACT Tailings dam is the main heavy metal pollution source in mining areas. In this study, the concentration of heavy metals in soil and water from upstream and downstream of the tailings dam was analyzed. The concentration of As, Cd, Cu, Ni, Pb, and W in tailings soil exceeded the standard value but Hg and Zn in the tailings soil were far below the standard. Average concentrations of As, Pb, and W in soil samples were above the upstream reference soil. The level of As and Pb decreases, downstream as the distance from the tailings dam increases. The mean concentrations of the heavy metals in water for Ni, Cu, Zn, Pb, and Cd were 106.3, 57.3, 21.8, 14.5, and 8.0 µg/L, respectively. The Ni contents in all studied water samples had concentrations higher than Awata River and WHO guidelines for drinking water. Both geo-accumulation and ecological risk indices have indicated significant heavy metal pollution in the study area. The overall results of this study showed that the soil and water downstream of the tailings dam were not safe and must be protected against access to humans and domestic animals.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"26 1","pages":"1 - 11"},"PeriodicalIF":1.7,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42562421","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}

引用次数: 1

Using the electrokinetic remediation (EKR) technique for the soil remediation from the contaminants 利用电动修复技术从污染物中修复土壤

IF 1.7

Geosystem Engineering Pub Date : 2022-12-22 DOI: 10.1080/12269328.2022.2159884

Faraz Biabanaki, J. Neshati, M. Ehteshami

引用次数: 0

Feasibility study on the use of magnetic susceptibility for recovery of vanadium component in magnetite 利用磁化率回收磁铁矿中钒组分的可行性研究

IF 1.7

Geosystem Engineering Pub Date : 2022-11-02 DOI: 10.1080/12269328.2022.2161074

Yoo Seong Lim, Jaehyuk Choi, Kyoungkeun Yoo, Sang-hun Lee

{"title":"Feasibility study on the use of magnetic susceptibility for recovery of vanadium component in magnetite","authors":"Yoo Seong Lim, Jaehyuk Choi, Kyoungkeun Yoo, Sang-hun Lee","doi":"10.1080/12269328.2022.2161074","DOIUrl":"https://doi.org/10.1080/12269328.2022.2161074","url":null,"abstract":"ABSTRACT Vanadium in the vanadium-bearing titanomagnetite (VTM) exist by replacing iron in the magnetite crystal, and magnetite should be recovered separately from titanium components in the vanadium-bearing titanomagnetite. In the present study, a sensing system was proposed by measuring magnetic susceptibility of magnetite because the magnetic susceptibility can be easily and quickly measured. The effects of mixing ratio of magnetite and ilmenite with silica and the distance between the magnetic susceptibility meter and the sample bed on the magnetic susceptibility were investigated. The magnetic susceptibility of the mixture of magnetite and ilmenite with 0.1 g or 0.2 g of silica decreased with increasing the ratio of ilmenite in the mixture, but the effect of silica addition was not significant. When the distance between the magnetic susceptibility meter and the sample bed increased, the magnetic susceptibility of magnetite decreased, but the magnetic susceptibility decreased with increasing the thickness of magnetite sample bed of magnetite. Because the magnetic susceptibility depended strongly on the content of magnetite, the sensing system using the magnetic susceptibility measurement could be successfully applied to detect magnetite.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"25 1","pages":"280 - 284"},"PeriodicalIF":1.7,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45895976","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}

引用次数: 1

Thermal behavior of acidic and alkali activated laterite based geopolymer: a comparative study 酸、碱活化红土基地聚合物的热行为比较研究

IF 1.7

Geosystem Engineering Pub Date : 2022-11-02 DOI: 10.1080/12269328.2022.2157895

Raphael Belinga Essama Boum, Francois Mvondo Owono, C. R. Kaze, Juste Constant Essomba Essomba, Bakary Souleymanou, J. G. Deutou Nemaleu, M. Ntamak-Nida

{"title":"Thermal behavior of acidic and alkali activated laterite based geopolymer: a comparative study","authors":"Raphael Belinga Essama Boum, Francois Mvondo Owono, C. R. Kaze, Juste Constant Essomba Essomba, Bakary Souleymanou, J. G. Deutou Nemaleu, M. Ntamak-Nida","doi":"10.1080/12269328.2022.2157895","DOIUrl":"https://doi.org/10.1080/12269328.2022.2157895","url":null,"abstract":"ABSTRACT Laterite soils account for 70% of Cameroon territory. The present study aims to investigate the thermal behavior of geopolymer from both thermally activated lateritic clay and indurated laterite at 700°C. The resulting calcined powder was consolidated with phosphoric acid (PA) and alkaline solution (AS), and after 28 days of cure, the geopolymer then was heated at 200°C, 400°C, 600°C, 800°C and 1000°C. At room temperature (25°C), applying an acidic medium developed best mechanical performance (85.6 MPa) using highly indurated laterite (CUPA) than clayey-rich laterite (EMPA) that gave 44.86 MPa. Increasing the heating temperature up to 1000°C greatly affected the samples consolidated with an acid solution than with alkaline medium. This suggests the best stability of N-A-S-H than phosphate binder at high temperature. The high performance of acid-activated samples is related to the alteration of iron minerals in acid medium allowing the formation of Fe-O-P bonds, while the decrease in compressive strength with the increase of heating temperature up to 1000°C is related to the dehydroxylation of formed binder phases that weakened the structure.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"25 1","pages":"225 - 238"},"PeriodicalIF":1.7,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43198800","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}

引用次数: 3

Development of a recovery process of thorium and possible separation of rare earths from Korean monazite 韩国独居石中钍回收工艺的发展及稀土分离的可能性

IF 1.7

Geosystem Engineering Pub Date : 2022-11-02 DOI: 10.1080/12269328.2022.2158496

J. Jeon, Ana Belen Cueva Sola, G. Park, Jin-Young Lee, H. Kim, R. Jyothi

引用次数: 1

Selective recovery and intensification of Mn from spent LiMn2O4 using sulfuric acid as lixiviant and Na-D2EHPA as extractant 以硫酸为浸出剂，Na-D2EHPA为萃取剂从废LiMn2O4中选择性回收和强化Mn

IF 1.7

Geosystem Engineering Pub Date : 2022-10-04 DOI: 10.1080/12269328.2022.2127426

Archita Mohanty, Lala Behari Sukla, S. Nayak, N. Devi

{"title":"Selective recovery and intensification of Mn from spent LiMn2O4 using sulfuric acid as lixiviant and Na-D2EHPA as extractant","authors":"Archita Mohanty, Lala Behari Sukla, S. Nayak, N. Devi","doi":"10.1080/12269328.2022.2127426","DOIUrl":"https://doi.org/10.1080/12269328.2022.2127426","url":null,"abstract":"ABSTRACT Despite the rising demand for lithium-ion batteries and their widespread acceptance, recycling and repurposing end-of-life lithium-ion battery materials is still a work in progress. This will help mitigate the dependence on raw materials and risks of shortage while promoting a circular economy. The present work addresses a hydrometallurgical process to recover Mn from spent LiMn2O4 using sulphuric acid as a lixiviant and Na-D2EHPA as extractant. Effects of various leaching parameters have been studied and the pregnant leach solution has been generated using 1 mol/L H2SO4 with 6% H2O2 at a pulp density of 10 g/L, maintaining the temperature at 30°C at 450 rpm for 1 hour which contained 2.52 g/L Mn and 0.545 g/L of Li. The PLS was subjected to separation using solvent extraction method taking 70% saponified di-(2-ethylhexyl) phosphoric acid (D2EHPA) as extractant. The McCabe-Thiele plot suggested two theoretical stages at O:A ratio of 1:1 using 0.3 mol/L Na-D2EHPA with 99.94% extraction of Mn and 10.2% co-extraction of Li. The co-extracted lithium was removed by scrubbing with MnSO4 solution. The loaded organic containing 2.574 g/L Mn was stripped using 10% H2SO4 at two stages at O: A ratio of 1.5:1 and enriched the concentration of manganese 1.5 times in the stripped solution.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"25 1","pages":"246 - 255"},"PeriodicalIF":1.7,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44235008","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}

引用次数: 4

Application of Debye–Huckel and Bronsted-Bjerrum theory to mass transfer rate in supported liquid membrane; effect of ionic strength on separation factor, an analysis through case studies 德拜-哈克尔和布理论在支撑液膜传质速率研究中的应用；离子强度对分离因子的影响&基于实例分析

IF 1.7

Geosystem Engineering Pub Date : 2022-09-26 DOI: 10.1080/12269328.2022.2127425

B. Swain, K. Sarangi, Jay Ryang Park, C. Lee

引用次数: 0

Influence of calcined medium grade clay on the properties of Portland cement pastes 煅烧中等标号粘土对硅酸盐水泥浆体性能的影响

IF 1.7

Geosystem Engineering Pub Date : 2022-09-22 DOI: 10.1080/12269328.2022.2127001

N. Rakhimova, V. Morozov, A. Eskin

{"title":"Influence of calcined medium grade clay on the properties of Portland cement pastes","authors":"N. Rakhimova, V. Morozov, A. Eskin","doi":"10.1080/12269328.2022.2127001","DOIUrl":"https://doi.org/10.1080/12269328.2022.2127001","url":null,"abstract":"ABSTRACT In the recent decades, the composition of Portland cements has undergone significant changes related to an increase in the range and content of supplementary cementitious materials following development of composite and multicomposite cements. The development of these binders that meet the requirements of sustainability requires the expansion and adaptation of the mineral resource base of cement industry to the production of low-emission binders with a gradual decrease of resource and energy intensities. Efforts to find the widespread sources of pozzolans providing high reactivity and physical–chemical stability have led to intensive studies on thermally treated clays of various chemical–mineralogical composition and their industrial adoption. Due to scarcity and high cost of kaolin clays, great attention is given to medium- and low-grade clays. This article reports on a study to evaluate the effect of calcined clay with 52% of clay minerals on the properties of fresh and hardened pastes, in particular on the resistance to sodium sulfate and nitric acid attacks. The reaction products assemblage of the blended Portland cement pastes was investigated by XRD and thermal analyses. The hardened Portland cement pastes incorporated with thermally treated clay demonstrated better durability performance compared to reference ones.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"45 1","pages":"273 - 279"},"PeriodicalIF":1.7,"publicationDate":"2022-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41276969","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}

引用次数: 0

The contribution of the Chilean mining industry to the achievement of the 17 sustainable development goals 智利采矿业对实现17个可持续发展目标的贡献

IF 1.7

Geosystem Engineering Pub Date : 2022-07-04 DOI: 10.1080/12269328.2022.2147588

M. N. Herrera

引用次数: 0

Development of in-situ electro-generated chlorine leaching and its application to the leaching of platinum 原位电氯浸出研究进展及其在铂浸出中的应用

IF 1.7

Geosystem Engineering Pub Date : 2022-07-04 DOI: 10.1080/12269328.2022.2148758

Min-seuk Kim, R. Kim, K. Chung, Jae-chun Lee

引用次数: 0