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Raza MH, Khan M, Zhong RY. Strength, porosity and life cycle analysis of geopolymer and hybrid cement mortars for sustainable construction. Sci Total Environ 2024; 907:167839. [PMID: 37863214 DOI: 10.1016/j.scitotenv.2023.167839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 09/25/2023] [Accepted: 10/12/2023] [Indexed: 10/22/2023]
Abstract
Owing to the application of industrial wastes, geopolymers are generally regarded as a sustainable alternative to traditional construction materials. However, their lack of adoption on the industrial scale demands detailed investigations. This study conducts a comparative analysis of the compressive strength of different geopolymer and hybrid cement mortars with varying proportions of sodium hydroxide (from 5 to 25 wt%) and ordinary Portland cement (OPC) (from 15 to 35 wt%), respectively. The porosity of all designed mixtures was also analyzed using X-ray computed tomography (XCT) and water absorption tests. ReCiPe 2016 Midpoint (H) method was used for the Life cycle analysis of the geopolymer and hybrid cement mortars. Multi-criteria decision making (MCDM) approach was used to assess the sustainability potential of the designed mixtures based on compressive strength, porosity and overall environmental impact. Experimental results revealed that the increase in sodium hydroxide in geopolymer mortars up to 15 wt% offered its maximum compressive strength. Superior compressive strength was obtained at 35 wt% of OPC in hybrid cement mortars due to the formation of more C-S-H, C-A-S-H and N-A-S-H gels which fill up the voids and pores. Analysis of the macro and micro-porosity revealed that hybrid cement mortars yield denser structure than geopolymer mortars. Life cycle analysis based on 8 distinct impact categories showed that hybrid cement mortars outperform the geopolymers in all impact categories except 'mineral resource scarcity'. However, the overall environmental impact assessment using the 'coefficient of performance' depicts that hybrid cement mortars offer a significantly lower environmental burden than geopolymers. MCDM analysis shows that hybrid cement mortar with 5 wt% of sodium hydroxide and 35 wt% of OPC is the best choice for construction applications. This idea of sustainable hybrid cement mortar will be helpful for the construction industry to limit the environmental impact without compromising their structural performance.
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Affiliation(s)
- Muhammad Huzaifa Raza
- Department of Industrial and Manufacturing Systems Engineering, The University of Hong Kong, Hong Kong.
| | - Mahram Khan
- Department of Civil Engineering, The University of Hong Kong, Hong Kong.
| | - Ray Y Zhong
- Department of Industrial and Manufacturing Systems Engineering, The University of Hong Kong, Hong Kong
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Li D, Ramos AO, Bah A, Li F. Valorization of lead-zinc mine tailing waste through geopolymerization: Synthesis, mechanical, and microstructural properties. J Environ Manage 2024; 349:119501. [PMID: 37952378 DOI: 10.1016/j.jenvman.2023.119501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 10/10/2023] [Accepted: 10/26/2023] [Indexed: 11/14/2023]
Abstract
Lead-zinc mine tailing waste can have significant environmental impacts due to its potential for releasing toxic elements into the surroundings and contaminating local soil and water. This paper focuses on the valorization of lead-zinc mine tailing waste through geopolymerization, a sustainable process that can transform waste into useful building materials. Geopolymer matrixes with various mixtures of mine tailing (0-100 wt%), fly ash (0-100 wt%), and flue gas desulfurization (FGD) gypsum (0, 5, and 10 wt%) were synthesized using different activators such as sodium hydroxide (NaOH, 5, 10 M) and sodium silicate (waterglass, 0, 12.5 wt%). Visual inspection, unconfined compressive strength (UCS) testing, and microstructural analysis (e.g., X-ray diffractions, Fourier transforms infrared, and scanning electron microscopy) were employed for the physicochemical characterization of these geopolymers. The highest UCS value of 24.1 MPa was observed in a geopolymer specimen with 100 wt% fly ash and activated by 10 M NaOH and cured for 28 days. The blending of mine tailings would result in strength recession, e.g., the integrating of 25 wt% tailings showed a UCS of 12.3 MPa. The addition of 5 wt% gypsums can improve early strength development, particularly for matrixes with 50-75 wt% fly ash. But adding 10 wt% gypsums would lead to strength retrogression of the resulting geopolymers. The introduction of waterglass can also facilitate geopolymerization and improve strength development. However, the cointegrating of gypsum and waterglass can induce an antagonistic effect and lead to the collapse of the geopolymer specimens. The findings revealed that the strength and microstructural properties of geopolymer are determined by the matrix compositions, alkaline activators, etc. Effective regulation of these factors can produce geopolymer matrixes with high dimensional stability and UCS that well meet construction material standards. Overall, the study indicates that geopolymerization represents a viable and eco-friendly solution for valorizing lead-zinc mine tailing waste and gaining alternative building materials.
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Affiliation(s)
- Dawei Li
- Collaborative Innovation Centre of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, 219 Ningliu Road, Nanjing 210044, China
| | - Andrea O Ramos
- Collaborative Innovation Centre of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, 219 Ningliu Road, Nanjing 210044, China
| | - Alseny Bah
- Collaborative Innovation Centre of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, 219 Ningliu Road, Nanjing 210044, China
| | - Feihu Li
- Collaborative Innovation Centre of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, 219 Ningliu Road, Nanjing 210044, China.
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Chen T, Wen X, Zhou J, Lu Z, Li X, Yan B. A critical review on the migration and transformation processes of heavy metal contamination in lead-zinc tailings of China. Environ Pollut 2023; 338:122667. [PMID: 37783414 DOI: 10.1016/j.envpol.2023.122667] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 09/11/2023] [Accepted: 09/29/2023] [Indexed: 10/04/2023]
Abstract
The health risks of lead-zinc (Pb-Zn) tailings from heavy metal (HMs) contamination have been gaining increasing public concern. The dispersal of HMs from tailings poses a substantial threat to ecosystems. Therefore, studying the mechanisms of migration and transformation of HMs in Pb-Zn tailings has significant ecological and environmental significance. Initially, this study encapsulated the distribution and contamination status of Pb-Zn tailings in China. Subsequently, we comprehensively scrutinized the mechanisms governing the migration and transformation of HMs in the Pb-Zn tailings from a geochemical perspective. This examination reveals the intricate interplay between various biotic and abiotic constituents, including environmental factors (EFs), characteristic minerals, organic flotation reagents (OFRs), and microorganisms within Pb-Zn tailings interact through a series of physical, chemical, and biological processes, leading to the formation of complexes, chelates, and aggregates involving HMs and OFRs. These interactions ultimately influence the migration and transformation of HMs. Finally, we provide an overview of contaminant migration prediction and ecological remediation in Pb-Zn tailings. In this systematic review, we identify several forthcoming research imperatives and methodologies. Specifically, understanding the dynamic mechanisms underlying the migration and transformation of HMs is challenging. These challenges encompass an exploration of the weathering processes of characteristic minerals and their interactions with HMs, the complex interplay between HMs and OFRs in Pb-Zn tailings, the effects of microbial community succession during the storage and remediation of Pb-Zn tailings, and the importance of utilizing process-based models in predicting the fate of HMs, and the potential for microbial remediation of tailings.
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Affiliation(s)
- Tao Chen
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, University Town, Guangzhou, 510006, China.
| | - Xiaocui Wen
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, University Town, Guangzhou, 510006, China
| | - Jiawei Zhou
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, University Town, Guangzhou, 510006, China
| | - Zheng Lu
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Xueying Li
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Bo Yan
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, University Town, Guangzhou, 510006, China
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Yu K, Ma L, Ngo I, Wang Y, Zhai J. Study on the fluidity of foamed alkali-activated slag cementitious material (AASCM). Heliyon 2023; 9:e22277. [PMID: 38053877 PMCID: PMC10694308 DOI: 10.1016/j.heliyon.2023.e22277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 10/09/2023] [Accepted: 11/08/2023] [Indexed: 12/07/2023] Open
Abstract
This study aims to investigate the evolution patterns of fluidity and rheological properties of AASCM under varying dosages of foaming agent and particle sizes of filling aggregate. The flow characteristics of AASCM are significantly affected by the filling aggregate's size and the foaming agent's dosage. Specifically, an increase in filling aggregate size (D(4,3) ϵ [26 μm, 69 μm]) enhances the fluidity of foamed AASCM, while an increase in foaming agent dosage reduces fluidity. These observed variations can be attributed to the presence of particle voids, the specific surface area of the aggregate, as well as the quantity and spatial distribution of bubbles within the slurry. A bubble-particle packing model is established, and by calibrating the simulation error coefficient to 1.1, the study investigates the evolution of water film thickness (WFT) in foamed AASCM with slurry expansion degree. It is observed that bubbles in the slurry affect the fluidity by altering the overall compactness and specific surface area of the foamed slurry, subsequently modifying the WFT.
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Affiliation(s)
- Kunpeng Yu
- School of Mines, China University of Mining and Technology, Xuzhou, 221116, China
| | - Liqiang Ma
- School of Mines, China University of Mining and Technology, Xuzhou, 221116, China
- Key Laboratory of Xinjiang Coal Resources Green Mining (Xinjiang Institute of Engineering), Ministry of Education, Urumqi 830023, China
| | - Ichhuy Ngo
- School of Mines, China University of Mining and Technology, Xuzhou, 221116, China
| | - Yangyang Wang
- School of Mines, China University of Mining and Technology, Xuzhou, 221116, China
| | - Jiangtao Zhai
- School of Mines, China University of Mining and Technology, Xuzhou, 221116, China
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Komaei A, Soroush A, Fattahi SM, Ghanbari H. Wind erosion control using alkali-activated slag cement: Experimental investigation and microstructural analysis. J Environ Manage 2023; 344:118633. [PMID: 37478719 DOI: 10.1016/j.jenvman.2023.118633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/10/2023] [Accepted: 07/11/2023] [Indexed: 07/23/2023]
Abstract
This paper aims to mitigate wind erosion of soil by employing alkali-activated slag. Wind tunnel tests were conducted on soil samples treated with varying percentages of slag at different wind speeds (7, 14, 21, and 28 m/s) and under a sand bombardment condition. In the absence of saltating particles, the erodibility ratios of the alkali-activated slag-treated samples with weight percentages of 1%, 2%, 4%, and 6% to the untreated sample at the highest wind speed (i.e., 28 m/s) correspond to 0.19%, 0.10%, 0.08%, and 0.06%, respectively. Moreover, in the presence of saltating particle bombardment, these samples exhibited erodibility reductions of 98.5%, 98.8%, 99.4%, and 99.6% compared to the untreated sample. The strength of the formed crusts, determined by penetrometer tests, increased significantly for the treated samples, ranging from 1300 to 6500 times greater than the untreated sample. The complementary analysis using x-ray diffraction and field emission scanning electron microscopy revealed the formation of albite and anorthite crystals along with the formation of calcium aluminosilicate hydrate, sodium aluminosilicate hydrate, and calcium silicate hydrate gels in the cementation process. Overall, the study highlights the effectiveness of alkali-activated slag in forming strong crusts that provide substantial protection against wind erosion, resulting in a significant decrease in wind erodibility.
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Affiliation(s)
- Alireza Komaei
- Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Abbas Soroush
- Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran.
| | - Seyed Mohammad Fattahi
- Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Hesam Ghanbari
- Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran
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Valencia Isaza A, Mejía Arcila J, Restrepo J, Valencia García M, Peña LW. Performance and applications of lightweight geopolymer and alkali activated composites with incorporation of ceramic, polymeric and lignocellulosic wastes as aggregates: A review. Heliyon 2023; 9:e20044. [PMID: 37767512 PMCID: PMC10520330 DOI: 10.1016/j.heliyon.2023.e20044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 09/07/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
As the construction industry moves towards greater sustainability, the application of more durable and environmentally friendly materials, capable of providing comfort in buildings and infrastructure, is a key element to consider. In this context, the use of alkali-activated binders (AAB) and geopolymers (GP), which have a lower carbon footprint than ordinary Portland cement (OPC), has emerged as an important alternative. Moreover, the addition of waste-based lightweight aggregates (LWA) to AAB and GP matrices produces lightweight composites that offer enhanced mechanical performance and improved comfort as building materials, while offering an alternative use to the increasing number of waste materials from diverse sources. This paper presents a comprehensive review of the literature on the above-mentioned topics (waste LWA in an AAB/GP matrix) published between 2012 and 2023, mainly indexed in the Scopus database. The waste-based LWA reported in the literature were categorized, and their properties and morphology presented. Then, the influence of the size, quantity, and nature of the LWA on the composite's properties and performance was analyzed. Fresh state performance, mechanical performance, density, and thermal and acoustic insulation were considered. This review is complemented by a bibliometric analysis, where keyword correlation and co-authorship networks on this field are established. The review highlights the potential of cementitious composites including waste-based LWA as a sustainable building material for structural and non-structural applications. However, more studies are required to further understand the behaviour of these composites under innovative manufacturing processes, such as extrusion and 3D printing.
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Affiliation(s)
- A. Valencia Isaza
- Grupo de Investigación en Materiales Alternativos y Procesos Automáticos (MAPA), Universidad EIA, Colombia
| | - J.M. Mejía Arcila
- Grupo de Investigación en Materiales Alternativos y Procesos Automáticos (MAPA), Universidad EIA, Colombia
| | - J.W. Restrepo
- Grupo de Investigación en Materiales Alternativos y Procesos Automáticos (MAPA), Universidad EIA, Colombia
| | - M.F. Valencia García
- Grupo de Investigación en Materiales Alternativos y Procesos Automáticos (MAPA), Universidad EIA, Colombia
| | - L.V. Wilches Peña
- Grupo de Investigación en Materiales Alternativos y Procesos Automáticos (MAPA), Universidad EIA, Colombia
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Tian C, Zhou J, Ren C, Omran M, Zhang F, Tang J. Drying Kinetics of Microwave-Assisted Drying of Leaching Residues from Hydrometallurgy of Zinc. Materials (Basel) 2023; 16:5546. [PMID: 37629838 PMCID: PMC10456744 DOI: 10.3390/ma16165546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 08/03/2023] [Accepted: 08/05/2023] [Indexed: 08/27/2023]
Abstract
In the hydrometallurgical process of zinc production, the residue from the leaching stage is an important intermediate product and is treated in a Waelz kiln to recover valuable metals. To ensure optimal results during the Waelz kiln process, it is necessary to pre-treat the residues by drying them first due to their higher water content. This work studies the residue's drying process using microwave technology. The study results indicate that microwave technology better removes the residue's oxygen functional groups and moisture. The dehydration process's effective diffusion coefficient increases as the microwave's heating power, the initial moisture content, and the initial mass increase. The Page model is appropriate for imitating the drying process, and the activation energy of the drying process for the residues is -13.11217 g/W. These results indicate that microwave technology efficiently dries the residues from the leaching stage. Furthermore, this study provides a theoretical basis and experimental data for the industrial application of microwave drying.
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Affiliation(s)
- Chunlan Tian
- Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming 650500, China; (C.T.); (J.Z.); (C.R.); (J.T.)
| | - Ju Zhou
- Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming 650500, China; (C.T.); (J.Z.); (C.R.); (J.T.)
| | - Chunxiao Ren
- Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming 650500, China; (C.T.); (J.Z.); (C.R.); (J.T.)
| | - Mamdouh Omran
- Faculty of Technology, University of Oulu, 90570 Oulu, Finland
| | - Fan Zhang
- Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming 650500, China; (C.T.); (J.Z.); (C.R.); (J.T.)
| | - Ju Tang
- Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming 650500, China; (C.T.); (J.Z.); (C.R.); (J.T.)
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Abdul F, Iizuka A, Ho HJ, Adachi K, Shibata E. Potential of major by-products from non-ferrous metal industries for CO 2 emission reduction by mineral carbonation: a review. Environ Sci Pollut Res Int 2023:10.1007/s11356-023-27898-y. [PMID: 37308624 DOI: 10.1007/s11356-023-27898-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 05/21/2023] [Indexed: 06/14/2023]
Abstract
By-products from the non-ferrous industry are an environmental problem; however, their economic value is high if utilized elsewhere. For example, by-products that contain alkaline compounds can potentially sequestrate CO2 through the mineral carbonation process. This review discusses the potential of these by-products for CO2 reduction through mineral carbonation. The main by-products that are discussed are red mud from the alumina/aluminum industry and metallurgical slag from the copper, zinc, lead, and ferronickel industries. This review summarizes the CO2 equivalent emissions generated by non-ferrous industries and various data about by-products from non-ferrous industries, such as their production quantities, mineralogy, and chemical composition. In terms of production quantities, by-products of non-ferrous industries are often more abundant than the main products (metals). In terms of mineralogy, by-products from the non-ferrous industry are silicate minerals. Nevertheless, non-ferrous industrial by-products have a relatively high content of alkaline compounds, which makes them potential feedstock for mineral carbonation. Theoretically, considering their maximum sequestration capacities (based on their oxide compositions and estimated masses), these by-products could be used in mineral carbonation to reduce CO2 emissions. In addition, this review attempts to identify the difficulties encountered during the use of by-products from non-ferrous industries for mineral carbonation. This review estimated that the total CO2 emissions from the non-ferrous industries could be reduced by up to 9-25%. This study will serve as an important reference, guiding future studies related to the mineral carbonation of by-products from non-ferrous industries.
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Affiliation(s)
- Fakhreza Abdul
- Department of Environmental Studies for Advanced Society, Graduate School of Environmental Studies, Tohoku University, 468-1, Aoba, Aramaki, Aoba-Ku, Sendai, Miyagi, 980-0845, Japan.
- Department of Materials and Metallurgical Engineering, Faculty of Industrial Technology and System Engineering, Institut Teknologi Sepuluh Nopember, Arief Rahman Hakim Street, Surabaya, 60111, Indonesia.
| | - Atsushi Iizuka
- Center for Mineral Processing and Metallurgy, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-Ku, Sendai, Miyagi, 980-8577, Japan
| | - Hsing-Jung Ho
- Center for Mineral Processing and Metallurgy, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-Ku, Sendai, Miyagi, 980-8577, Japan
| | - Ken Adachi
- Center for Mineral Processing and Metallurgy, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-Ku, Sendai, Miyagi, 980-8577, Japan
| | - Etsuro Shibata
- Center for Mineral Processing and Metallurgy, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-Ku, Sendai, Miyagi, 980-8577, Japan
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Huang T, Song D, Zhou L, Pan L, Zhang SW. Self-alkali-activated self-cementation achievement and mechanism exploration for the synergistic treatment of the municipal solid waste incineration fly ashes and the arsenic-contaminated soils. Chemosphere 2023; 325:138397. [PMID: 36925014 DOI: 10.1016/j.chemosphere.2023.138397] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 02/25/2023] [Accepted: 03/11/2023] [Indexed: 06/18/2023]
Abstract
The feasibility and potential mechanisms of the self-alkali activation brought by municipal solid waste incineration (MSWI) fly ashes to the self-cementation of arsenic-contaminated soils were quantitatively evaluated and comprehensively analyzed to avoid the additional application of the alkali activators and binder materials traditionally. The employment of the two kinds of precursor materials achieved the self-alkali-activated self-cementation ('double self') under ambient conditions. The largest compressive strength (MPa) of 25.64 and lowest leaching toxicities (mg/L) of 21.05, 2.86, 0.08, 0.02, 2.05, and 0.34 for Zn, Cu, Cr, Cd, Pb, and As were obtained in the solidified matrix. Geopolymerization kinetics of the 'double self' cementation can be mathematically fitted by the Johnson-Mehl-Avrami-Kolmogorov model. CaClOH and halite in the MSWI fly ashes set up the self-alkali activation by reacting with the kaolinite and quartz in soils contaminated with arsenic by forming layered hydration and three-dimensional geopolymerization products to push for self-cementation.
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Affiliation(s)
- Tao Huang
- School of Materials Engineering, Changshu Institute of Technology, 215500, China; Suzhou Key Laboratory of Functional Ceramic Materials, Changshu Institute of Technology, Changshu, 215500, China; School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China.
| | - Dongping Song
- School of Materials Engineering, Changshu Institute of Technology, 215500, China; Suzhou Key Laboratory of Functional Ceramic Materials, Changshu Institute of Technology, Changshu, 215500, China
| | - Lulu Zhou
- School of Materials Engineering, Changshu Institute of Technology, 215500, China
| | - Longwei Pan
- School of Materials Engineering, Changshu Institute of Technology, 215500, China
| | - Shu-Wen Zhang
- Nuclear Resources Engineering College, University of South China, 421001, China
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Li C, Dong P, Yan J, Gong R, Meng Q, Yao J, Yu H, Ma Y, Liu B, Xie R. Analytical study on heavy metal output fluxes and source apportionment of a non-ferrous smelter in southwest China. Environ Pollut 2023:121867. [PMID: 37270050 DOI: 10.1016/j.envpol.2023.121867] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/28/2023] [Accepted: 05/21/2023] [Indexed: 06/05/2023]
Abstract
Abandoned Pb/Zn smelters are often accompanied by a large amount of smelting slag, which is a serious environmental problem. Previous studies have demonstrated that slag deposits pose an environmental threat even if the smelters are shut down. Herein, a Pb/Zn smelter and its impacted zone in GeJiu, Yunnan, China were selected as the study area. The risk and source apportionment of heavy metals (HMs) in the soil of the impacted zone were systematically studied. Based on the hydrogeological features, the migration path and output fluxes of the HMs released from smelting slag to the impacted zone were investigated. The HM contents (Cd, As, Zn, Pb, and Cu) in the soil substantially exceeded the screening values of the Chinese soil standard (GB15618-2018). Based on the results of the Pb isotopic and statistical analyses for source apportionment, the contaminated sites and agricultural irrigation water had a large impact on the HMs of soil. The hydrological analysis results showed that runoff, as an HM migration path under rainfall, continued to affect the environment. The water balance calculations using the Hydrologic Evaluation of Landfill Performance model showed that the rainfall was distributed on site as follows: evaporation (57.35%), runoff (32.63%), and infiltration (10.02%). Finally, the output fluxes were calculated in combination with the leaching experiment. As, Zn, Cd, Pb, and Cu runoff had the output fluxes of 6.1 × 10-3, 4.2 × 10-3, 4.1, 1.4 × 10-2, and 7.2 × 10-4 mg/kg/y, and infiltration of 1.9 × 10-3, 1.3 × 10-3, 1.3, 4.0 × 10-4, and 2.2 × 10-4 mg/kg/y, respectively. Therefore, this study offers theoretical and scientific recommendations for effective environmental management and engineering remediation.
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Affiliation(s)
- Chenchen Li
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Peng Dong
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Jin Yan
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Rui Gong
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Qi Meng
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Jun Yao
- Faculty of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Hanjing Yu
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Yaoqiang Ma
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China
| | - Bang Liu
- Faculty of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Ruosong Xie
- Faculty of Metallurgy and Energy Engineering, National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials Or Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China.
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11
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Huang T, Zhou L, Yang CH, Zhang SW. Self-cementation of gold tailings activated by nonthermal plasma irradiated calcium (hydro)oxide. Environ Pollut 2023; 325:121442. [PMID: 36921659 DOI: 10.1016/j.envpol.2023.121442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 03/03/2023] [Accepted: 03/11/2023] [Indexed: 06/18/2023]
Abstract
The alkalinity of CaO is commonly insufficient in alkali-activating raw soils or minerals for the formation of cementation or geopolymerization. In this study, nonthermal plasma (NTP) irradiation was employed to activate traditional CaO to enhance its efficacy in alkali activation and further intensify the self-cementation of gold tailings. The solidification/stabilization (S/S) of the gold tailings-based matrix activated by NTP-CaO was better than that of CaO. The NTP irradiation enhanced the surface hydroxyl groups and oxygen atoms, decreased the binding energy, formed nanoparticles, and significantly changed the morphologies of the calcium activator. The dosage of the NTP-irradiated CaO (NTP-CaO) directly affected the self-cemented solidification/stabilization of gold tailings. The Johnson-Mehl-Avrami-Kolmogorov model was appropriate for analysing the NTP-CaO-activated geopolymerization kinetics of gold tailings. Three-dimensional (3D) structural minerals covered with small pores were determined in the NTP-CaO-activated cemented samples. The employment of NTP-CaO facilitated the formation of aluminosilicate geopolymers during the self-cementation of gold tailings according to comprehensive characterization strategies. The study achieves the efficient self-remediation of gold tailings by activating calcium precursors, which further solves the contradiction between salinization and alkali activation in the field of noncalcined cementitious materials.
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Affiliation(s)
- Tao Huang
- School of Materials Engineering, Changshu Institute of Technology, 215500, China; Suzhou Key Laboratory of Functional Ceramic Materials, Changshu Institute of Technology, Changshu, 215500, China; School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China.
| | - Lulu Zhou
- School of Materials Engineering, Changshu Institute of Technology, 215500, China
| | - Chun-Hai Yang
- School of Materials Engineering, Changshu Institute of Technology, 215500, China
| | - Shu-Wen Zhang
- Nuclear Resources Engineering College, University of South China, 421001, China
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12
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Bi J, Mo C, Li S, Huang M, Lin Y, Yuan P, Liu Z, Jia B, Xu S. Immunotoxicity of metal and metal oxide nanoparticles: from toxic mechanisms to metabolism and outcomes. Biomater Sci 2023. [PMID: 37161951 DOI: 10.1039/d3bm00271c] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The influence of metal and metal oxide nanomaterials on various fields since their discovery has been remarkable. They have unique properties, and therefore, have been employed in specific applications, including biomedicine. However, their potential health risks cannot be ignored. Several studies have shown that exposure to metal and metal oxide nanoparticles can lead to immunotoxicity. Different types of metals and metal oxide nanoparticles may have a negative impact on the immune system through various mechanisms, such as inflammation, oxidative stress, autophagy, and apoptosis. As an essential factor in determining the function and fate of immune cells, immunometabolism may also be an essential target for these nanoparticles to exert immunotoxic effects in vivo. In addition, the biodegradation and metabolic outcomes of metal and metal oxide nanoparticles are also important considerations in assessing their immunotoxic effects. Herein, we focus on the cellular mechanism of the immunotoxic effects and toxic effects of different types of metal and metal oxide nanoparticles, as well as the metabolism and outcomes of these nanoparticles in vivo. Also, we discuss the relationship between the possible regulatory effect of nanoparticles on immunometabolism and their immunotoxic effects. Finally, we present perspectives on the future research and development direction of metal and metal oxide nanomaterials to promote scientific research on the health risks of nanomaterials and reduce their adverse effects on human health.
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Affiliation(s)
- Jiaming Bi
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, Guangdong, China.
| | - Chuzi Mo
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, Guangdong, China.
| | - Siwei Li
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, Guangdong, China.
| | - Mingshu Huang
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, Guangdong, China.
| | - Yunhe Lin
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, Guangdong, China.
| | - Peiyan Yuan
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, Guangdong, China.
| | - Zhongjun Liu
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, Guangdong, China.
| | - Bo Jia
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, Guangdong, China.
| | - Shuaimei Xu
- Department of Endodontics, Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, Guangdong, China.
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13
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Ponomar V, Ohenoja K, Illikainen M. Optimizing activating solution and environmental leaching characteristics of Fe-rich alkali-activated Zn slag. J Hazard Mater 2023; 445:130575. [PMID: 37055980 DOI: 10.1016/j.jhazmat.2022.130575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/17/2022] [Accepted: 12/06/2022] [Indexed: 06/19/2023]
Abstract
In this work, slag from Zn processing was used to produce Fe-rich alkali-activated materials (AAMs) with low environmental impact. The interconnection between activating solution composition, compressive strength, and environmental leaching characteristics was assessed. The reaction products characterised with FT-IR, XRD, and SEM-WDS were represented by Fe-rich C-S-H gel of tobermorite-related structure. The local aggregation of Na and Mg suggests the minor role of these elements in the reaction product. The reaction product seems to be undependable on the alkali cation used in the solution. Besides, the hardening reaction took place fast, and the maximum compressive strength of 70 MPa was determined only after 1 day after mixing with silicate solutions. To decrease the economic and environmental impact, 1) simultaneous decreasing Na2O/slag and SiO2/slag ratios or 2) decreasing SiO2/Na2O ratio can be applied without prominent deterioration of the strength. Environmental leaching results showed an increase in the leached content of several metal(loid)s (e.g., As, Mo, Cr, Sb, Se, V) as a results of alkali activation, but also some immobilization effect for Ba, Pb and Zn. Also, the presence of liquid silica in the activating solutions or higher water content reduced the leaching of some elements.
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Affiliation(s)
- Vitalii Ponomar
- Fibre and Particle Engineering Research Unit, University of Oulu, Pentti Kaiteran katu 1, 90014 Oulu, Finland.
| | - Katja Ohenoja
- Fibre and Particle Engineering Research Unit, University of Oulu, Pentti Kaiteran katu 1, 90014 Oulu, Finland
| | - Mirja Illikainen
- Fibre and Particle Engineering Research Unit, University of Oulu, Pentti Kaiteran katu 1, 90014 Oulu, Finland
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14
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Qaidi S, Najm HM, Abed SM, Ahmed HU, Al Dughaishi H, Al Lawati J, Sabri MM, Alkhatib F, Milad A. Fly Ash-Based Geopolymer Composites: A Review of the Compressive Strength and Microstructure Analysis. Materials (Basel) 2022; 15:ma15207098. [PMID: 36295166 PMCID: PMC9605405 DOI: 10.3390/ma15207098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/26/2022] [Accepted: 09/17/2022] [Indexed: 05/03/2023]
Abstract
Geopolymer (GP) concrete is a novel construction material that can be used in place of traditional Portland cement (PC) concrete to reduce greenhouse gas emissions and effectively manage industrial waste. Fly ash (FA) has long been utilized as a key constituent in GPs, and GP technology provides an environmentally benign alternative to FA utilization. As a result, a thorough examination of GP concrete manufactured using FA as a precursor (FA-GP concrete) and employed as a replacement for conventional concrete has become crucial. According to the findings of current investigations, FA-GP concrete has equal or superior mechanical and physical characteristics compared to PC concrete. This article reviews the clean production, mix design, compressive strength (CS), and microstructure (Ms) analyses of the FA-GP concrete to collect and publish the most recent information and data on FA-GP concrete. In addition, this paper shall attempt to develop a comprehensive database based on the previous research study that expounds on the impact of substantial aspects such as physio-chemical characteristics of precursors, mixes, curing, additives, and chemical activation on the CS of FA-GP concrete. The purpose of this work is to give viewers a greater knowledge of the consequences and uses of using FA as a precursor to making effective GP concrete.
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Affiliation(s)
- Shaker Qaidi
- Department of Civil Engineering, College of Engineering, University of Duhok, Duhok 42001, Iraq
- Department of Civil Engineering, College of Engineering, Nawroz University, Duhok 42001, Iraq
- Correspondence: (S.Q.); (H.M.N.); (A.M.)
| | - Hadee Mohammed Najm
- Department of Civil Engineering, Zakir Husain Engineering College, Aligarh Muslim University, Aligarh 202002, India
- Correspondence: (S.Q.); (H.M.N.); (A.M.)
| | - Suhad M. Abed
- Department of Highways & Airports Engineering, College of Engineering, University of Diyala, Diyala 32001, Iraq
| | - Hemn U. Ahmed
- Civil Engineering Department, College of Engineering, University of Sulaimani, Sulaimaniyah 16278, Iraq
| | - Husam Al Dughaishi
- Department of Civil and Environmental Engineering, College of Engineering, University of Nizwa, Nizwa P C 616, Ad-Dakhiliyah P.O. Box 33, Oman
| | - Jawad Al Lawati
- Department of Civil and Environmental Engineering, College of Engineering, University of Nizwa, Nizwa P C 616, Ad-Dakhiliyah P.O. Box 33, Oman
| | - Mohanad Muayad Sabri
- Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Fadi Alkhatib
- Department of Structural Engineering, Faculty of Civil Engineering and Built Environment, Universiti Tun Hussein Onn Malaysia (UTHM), Batu Pahat 86400, Malaysia
| | - Abdalrhman Milad
- Department of Civil and Environmental Engineering, College of Engineering, University of Nizwa, Nizwa P C 616, Ad-Dakhiliyah P.O. Box 33, Oman
- Correspondence: (S.Q.); (H.M.N.); (A.M.)
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15
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Wang Q, Huang T, Du J, Zhou L. Enhancement of Uranium Recycling from Tailings Caused by the Microwave Irradiation-Induced Composite Oxidation of the Fe-Mn Binary System. ACS Omega 2022; 7:24574-24586. [PMID: 35874237 PMCID: PMC9301716 DOI: 10.1021/acsomega.2c02392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The extraction of uranium (U)-related minerals from raw ore sands via a leaching procedure would produce enormous amounts of tailings, not only causing radioactivity contamination to surroundings but also wasting the potential U utilization. Effective recycling of U from U tailings is propitious to the current issues in U mining industries. In this study, the influence of the composite oxidation of Fe(III) and Mn(VII) intensified by microwave (MW) irradiation on the acid leaching of U from tailings was comprehensively explored in sequential and coupling systems. The U leaching activities from the tailing specimens were explicitly enhanced by MW irradiation. The composite oxidation caused by Fe(III) and Mn(VII) further facilitated the leaching of U ions from the tailing under MW irradiation in two systems. Maximum leaching efficiencies of 84.61, 80.56, and 92.95% for U ions were achieved in the Fe(III)-, Mn(VII)-, and Fe(III)-Mn(VII)-participated coupling systems, respectively. The inappropriateness of the shrinking core model (SCM) demonstrated by the linear fittings and analysis of variance (ANOVA) for the two systems explained a reverse increase of solid cores in the later stage of leaching experiments. The internal migration of oxidant ions into the particle cores enhanced by MW accelerated the dissolution of Al, Fe, and Mn constituents under acidic conditions, which further strengthened U extraction from tailing specimens.
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Affiliation(s)
- Qingxiang Wang
- School
of Safety Engineering, China University
of Mining and Technology, Xuzhou 221116, China
| | - Tao Huang
- School
of Safety Engineering, China University
of Mining and Technology, Xuzhou 221116, China
- School
of Materials Engineering, Changshu Institute
of Technology, Suzhou 215500, China
- Suzhou
Key Laboratory of Functional Ceramic Materials, Changshu Institute of Technology, Changshu 215500, China
| | - Jing Du
- School
of Materials Engineering, Changshu Institute
of Technology, Suzhou 215500, China
| | - Lulu Zhou
- School
of Materials Engineering, Changshu Institute
of Technology, Suzhou 215500, China
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16
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Khan AH, López-Maldonado EA, Khan NA, Villarreal-Gómez LJ, Munshi FM, Alsabhan AH, Perveen K. Current solid waste management strategies and energy recovery in developing countries - State of art review. Chemosphere 2022; 291:133088. [PMID: 34856242 DOI: 10.1016/j.chemosphere.2021.133088] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 11/02/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Solid waste generation has rapidly increased due to the worldwide population, urbanization, and industrialization. Solid waste management (SWM) is a significant challenge for a society that arises local issues with global consequences. Thus, solid waste management strategies to recycle waste products are promising practices that positively impact sustainable goals. Several developed countries possess excellent solid waste management strategies to recycle waste products. Developing countries face many challenges, such as municipal solid waste (MSW) sorting and handling due to high population density and economic instability. This mismanagement could further expedite harmful environmental and socioeconomic concerns. This review discusses the current solid waste management and energy recovery production in developing countries; with statistics, this review provides a comprehensive revision on energy recovery technologies such as the thermochemical and biochemical conversion of waste with economic considerations. Furthermore, the paper discusses the challenges of SWM in developing countries, including several immediate actions and future policy recommendations for improving the current status of SWM via harnessing technology. This review has the potential of helping municipalities, government authorities, researchers, and stakeholders working on MSW management to make effective decisions for improved SWM for achieving sustainable development.
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Affiliation(s)
- Afzal Husain Khan
- Civil Engineering Department, College of Engineering, Jazan University, P.O. Box. 706, Jazan 45142, Saudi Arabia; School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Pulau, Pinang, Malaysia.
| | - Eduardo Alberto López-Maldonado
- Faculty of Chemical Sciences and Engineering, Autonomous University of Baja California, CP, 22390, Tijuana, Baja California, Mexico
| | - Nadeem A Khan
- Civil Engineering Department, Jamia Millia Islamia, New Delhi, India.
| | - Luis Jesús Villarreal-Gómez
- Faculty of Chemical Sciences and Engineering, Autonomous University of Baja California, CP, 22390, Tijuana, Baja California, Mexico; Facultad de Ciencias de La Ingeniería y Tecnología, Universidad Autónoma de Baja California, Blvd Universitario 1000, Unidad Valle de Las Palmas, 22260, Tijuana, Baja California, Mexico
| | - Faris M Munshi
- Department of Civil Engineering, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia
| | - Abdullah H Alsabhan
- Department of Civil Engineering, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia
| | - Kahkashan Perveen
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh, 11495, Saudi Arabia
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17
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Liu Y, Su Y, Xu G, Chen Y, You G. Research Progress on Controlled Low-Strength Materials: Metallurgical Waste Slag as Cementitious Materials. Materials 2022; 15:727. [PMID: 35160673 PMCID: PMC8836444 DOI: 10.3390/ma15030727] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/09/2022] [Accepted: 01/15/2022] [Indexed: 02/06/2023]
Abstract
Increasing global cement and steel consumption means that a significant amount of greenhouse gases and metallurgical wastes are discharged every year. Using metallurgical waste as supplementary cementitious materials (SCMs) shows promise as a strategy for reducing greenhouse gas emissions by reducing cement production. This strategy also contributes to the utilization and management of waste resources. Controlled low-strength materials (CLSMs) are a type of backfill material consisting of industrial by-products that do not meet specification requirements. The preparation of CLSMs using metallurgical waste slag as the auxiliary cementing material instead of cement itself is a key feature of the sustainable development of the construction industry. Therefore, this paper reviews the recent research progress on the use of metallurgical waste residues (including blast furnace slag, steel slag, red mud, and copper slag) as SCMs to partially replace cement, as well as the use of alkali-activated metallurgical waste residues as cementitious materials to completely replace cement for the production of CLSMs. The general background information, mechanical features, and properties of pozzolanic metallurgical slag are introduced, and the relationship and mechanism of metallurgical slag on the performance and mechanical properties of CLSMs are analyzed. The analysis and observations in this article offer a new resource for SCM development, describe a basis for using metallurgical waste slag as a cementitious material for CLSM preparation, and offer a strategy for reducing the environmental problems associated with the treatment of metallurgical waste.
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18
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Huang T, Zhou L, Zhang SW, Li A. Uptake of cesium by the hydroxysulfate green rust-modified composite aluminosilicate materials, mathematical modeling, and mechanisms. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127314] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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19
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Costa FPD, Bezerra IMT, Fernandes JV, Rodrigues AM, Menezes RR, Neves GDA. Durability of Sustainable Ceramics Produced by Alkaline Activation of Clay Brick Residue. Sustainability 2021; 13:10931. [DOI: 10.3390/su131910931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Alkali-activated materials (AAMs) were produced using residues from the red ceramic industry as a precursor, and sodium hydroxide (NaOH), potassium hydroxide (KOH), and sodium silicate (Na2SiO3) as alkaline activators. The effect of activators and curing conditions on physical-mechanical properties and durability were evaluated. The processing parameters (amount of water and consistency index) and the activation conditions (the activator contents and curing temperature) were defined based on an experimental design getting the flexural rupture module as the response. The durability behavior was evaluated by natural aging, accelerated aging (simulated rain test), exposure to the marine environment (salt fog), and acidic environments (HCl and H2SO4). The results showed that the NaOH- and KOH-activated samples exhibited inferior mechanical behavior than those activated with Na2SiO3. In the durability studies, due to leaching, there was a decrease in mechanical strength when samples are subjected to aggressive exposure conditions. However, the strength values are still higher than the minimum indicated for traditional ceramic applications.
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20
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Yu L, Fang L, Zhang P, Zhao S, Jiao B, Li D. The Utilization of Alkali-Activated Lead-Zinc Smelting Slag for Chromite Ore Processing Residue Solidification/Stabilization. Int J Environ Res Public Health 2021; 18:ijerph18199960. [PMID: 34639258 PMCID: PMC8508533 DOI: 10.3390/ijerph18199960] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/16/2021] [Accepted: 09/18/2021] [Indexed: 12/03/2022]
Abstract
Lead–zinc smelting slag (LZSS) is regarded as a hazardous waste containing heavy metals that poses a significant threat to the environment. LZSS is rich in aluminosilicate, which has the potential to prepare alkali-activated materials and solidify hazardous waste, realizing hazardous waste cotreatment. In this study, the experiment included two parts; i.e., the preparation of alkali-activated LZSS (pure smelting slag) and chromite ore processing residue (COPR) solidification/stabilization. Single-factor and orthogonal experiments were carried out that aimed to explore the effects of various parameters (alkali solid content, water glass modulus, liquid–solid ratio, and initial curing temperature) for alkali-activated LZSS. Additionally, compressive strength and leaching toxicity were the indexes used to evaluate the performance of the solidified bodies containing COPR. As a result, the highest compressive strength of alkali-activated LZSS reached 84.49 MPa, and when 40% COPR was added, the strength decreased to 1.42 MPa. However, the leaching concentrations of Zn and Cr from all the solidified bodies were far below the critical limits (US EPA Method 1311 and China GB5085.3-2007). Heavy-metal ions in LZSS and COPR were immobilized successfully by chemical and physical means, which was detected by analyses including environmental scanning electron microscopy with energy-dispersive spectrometry, Fourier transform infrared spectrometry, and X-ray diffraction.
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Affiliation(s)
- Lin Yu
- State Key Laboratory for Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; (L.Y.); (L.F.); (P.Z.); (S.Z.)
- School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China
| | - Lu Fang
- State Key Laboratory for Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; (L.Y.); (L.F.); (P.Z.); (S.Z.)
- School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China
| | - Pengpeng Zhang
- State Key Laboratory for Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; (L.Y.); (L.F.); (P.Z.); (S.Z.)
- School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China
| | - Shujie Zhao
- State Key Laboratory for Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; (L.Y.); (L.F.); (P.Z.); (S.Z.)
- School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China
| | - Binquan Jiao
- State Key Laboratory for Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; (L.Y.); (L.F.); (P.Z.); (S.Z.)
- School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China
- Correspondence: (B.J.); (D.L.)
| | - Dongwei Li
- State Key Laboratory for Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; (L.Y.); (L.F.); (P.Z.); (S.Z.)
- School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China
- Correspondence: (B.J.); (D.L.)
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21
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Perná I, Novotná M, Řimnáčová D, Šupová M. New Metakaolin-Based Geopolymers with the Addition of Different Types of Waste Stone Powder. Crystals 2021; 11:983. [DOI: 10.3390/cryst11080983] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The search for new alternative raw materials and their subsequent use supports the sustainability of natural resources. This article describes the use of waste stone powder (WSP) in geopolymer synthesis. Five different types of WSP (feldspar, limestone, marlstone, dolomite, marble) were comprehensively characterized and their influence on the resulting properties (especially mechanical and textural properties, setting time and structure) of metakaolin-based geopolymer composites was investigated. Their comparison with a geopolymer composite containing only quartz sand has revealed that WSP additions have a small but positive effect on the mechanical or textural properties of geopolymers. Moreover, setting time measurements have shown that waste stone powders can be used as an accelerator of geopolymer reaction solidification. The results demonstrated that the mentioned types of WSP, previously landfilled, can be used for the preparation of geopolymers. This can help reduce the environmental burden.
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22
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Zhang W, Liu X, Wang Y, Li Z, Li Y, Ren Y. Binary reaction behaviors of red mud based cementitious material:Hydration characteristics and Na + utilization. J Hazard Mater 2021; 410:124592. [PMID: 33277076 DOI: 10.1016/j.jhazmat.2020.124592] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/21/2020] [Accepted: 11/12/2020] [Indexed: 06/12/2023]
Abstract
Bayer red mud (RM) occupies a large amount of land, which excessive Na+ seriously damages groundwater resources. In this research, a RM based cementitious material (RMC) composed of RM and ordinary Portland cement (OPC) was developed. It is interesting to find that a binary reaction consisting of cement hydration and geopolymer reaction in RMC. The mechanical and Na+ consolidation rate of RMC were improved by the synergistic effect of binary reaction. The results indicated that the compressive strength of RMC is the highest and reaches 32.5R OPC when the mass ratio of CaO/(SiO2+Al2O3) is 1.37, and the Na+ leaching concentration is environmentally acceptable. The 7 days compressive strength of RM-based cementitious material No.2 (RMC2) can reach 93.80% of that of 28 days. As the predominant hydration products, cement hydration product (Ca5(SiO4)2(OH)2) and geopolymer (CaAl2Si2O8·2H2O and Na3Al3Si3O12·2H2O) were principally responsible for the strength development of RMC2 at 7 days. The optimal densification microstructure and [SiO4] polymerization structure was presented in RMC2. The supreme Na+ consolidation rate was 99.23% in RMC2 due to the cooperation of physical fixation and [Si(Al)O4] charge balance principle. This paper provides a fresh theoretical guidance for the utilization of RM and its Na+ in building materials.
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Affiliation(s)
- Wei Zhang
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xiaoming Liu
- State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China; School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Yaguang Wang
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Zepeng Li
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yong Li
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yongyu Ren
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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23
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Mikula K, Izydorczyk G, Skrzypczak D, Moustakas K, Witek-Krowiak A, Chojnacka K. Value-added strategies for the sustainable handling, disposal, or value-added use of copper smelter and refinery wastes. J Hazard Mater 2021; 403:123602. [PMID: 32771815 DOI: 10.1016/j.jhazmat.2020.123602] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/24/2020] [Accepted: 07/30/2020] [Indexed: 06/11/2023]
Abstract
Metallurgical plants constituting of smelters and refineries recover metals (i.e., copper) from mineral deposits. Copper production generates several waste streams of which slag, sludge and dust are generated in the largest quantities. The need to eliminate or at least reduce their adverse effects on the environment call for developing methods for recovering valuable components such as copper, zinc and iron through their selective separation from toxic components present in the waste (mainly arsenic and lead). This can be achieved through hydrometallurgical methods (leaching with organic and inorganic media), techniques facilitating mobility of elements (roasting with leaching) and biological processes (bioleaching). The valorization of metallurgical waste as a source of fertilizer micronutrients can be a sustainable and value-added direction of its management. This review presents ways of useful-metals recovery from the copper smelter and refinery wastes, including selective separation of valuable metals. The novelty of this review is a demonstration of the application potential of recovered components from metallurgical waste in the agricultural sector.
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Affiliation(s)
- Katarzyna Mikula
- Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland.
| | - Grzegorz Izydorczyk
- Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland
| | - Dawid Skrzypczak
- Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland
| | - Konstantinos Moustakas
- School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zographou Campus, GR-15780 Athens, Greece
| | - Anna Witek-Krowiak
- Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland
| | - Katarzyna Chojnacka
- Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland
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24
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Leontari C, Kastanaki E, Moukazis I, Gidarakos E. Valorisation of soil contaminated by petroleum hydrocarbons and toxic metals in geopolymer mortar formation. J Environ Manage 2021; 278:111410. [PMID: 33113394 DOI: 10.1016/j.jenvman.2020.111410] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 08/20/2020] [Accepted: 09/12/2020] [Indexed: 05/25/2023]
Abstract
Until the complete transition to a renewable energy sources based economy, the potential environmental hazards associated with petroleum refinery industries affecting water, air and soil seek sustainable solutions. In the present study contaminated soil from a refinery is used as an alternative source for producing useful building materials by geopolymerization. To this end, soil remediation by thermal desorption was initially applied. Thermal treatment was performed between 60 and 250 °C for short time intervals (10-30 min) in order to remove organic pollutants (Total Petroleum Hydrocarbons, TPHs and Polycyclic Aromatic Hydrocarbons, PAHs). Physical, chemical analyses, mineral phase composition, as well as thermogravimetric analysis were employed to characterize the sample. Moreover, removal efficiency of TPHs and PAHs was evaluated. Subsequently, the treated soil presenting the maximum elimination of TPH and PAHs was used in geopolymer mortar formation aiming to stabilize the toxic metals (TMs) and produce a possible profitable material. For geopolymer synthesis the substitution of metakaolin (MT) by treated soil at 0, 50, 70 and 100% was tested. The produced specimens were evaluated based on the 28 day compressive strength and metals leaching. Results showed that the geopolymer constructed by 50% MT-50% remediated soil at 250 °C for 30 min, had negligible content of organic pollutants, TMs were immobilized and exhibited increased strength thus giving significant recycling benefits. Valorisation of industrial residues to produce building materials is a promising solution for sustainable waste management.
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Affiliation(s)
- Christina Leontari
- School of Environmental Engineering, Laboratory of Toxic and Hazardous Waste Management, Technical University of Crete, GR-73100, Chania, Crete, Greece
| | - Eleni Kastanaki
- School of Environmental Engineering, Laboratory of Toxic and Hazardous Waste Management, Technical University of Crete, GR-73100, Chania, Crete, Greece
| | - Ioannis Moukazis
- School of Environmental Engineering, Laboratory of Toxic and Hazardous Waste Management, Technical University of Crete, GR-73100, Chania, Crete, Greece
| | - Evangelos Gidarakos
- School of Environmental Engineering, Laboratory of Toxic and Hazardous Waste Management, Technical University of Crete, GR-73100, Chania, Crete, Greece.
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Zolotova ES, Ivanova NS, Ryabinin VF, Ayan S, Kotelnikova AL. Element mobility from the copper smelting slag recycling waste into forest soils of the taiga in Middle Urals. Environ Sci Pollut Res Int 2021; 28:1141-1150. [PMID: 32833170 DOI: 10.1007/s11356-020-10577-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
The article presents the results of assessing the element mobility (chemical elements and compounds) from the copper smelting slag recycling waste into brown forest soils (Haplic Cambisols) of the southern taiga district in Middle Urals, Russia. The copper smelting slag recycling waste was obtained by crushing the cast slag of the Sredneuralskiy Smelter ("technical sand") followed by flotation extraction of copper concentrate. The investigations were carried out in two forest types, distinguished according to the principles of the genetic forest typology, cowberry shrub pine forest and berry pine forest with linden, and the corresponding clear-cuttings. We conducted the experiment in the autumn before the snow cover was established in two variants: (i) we evenly scattered 1 kg of waste on meter sample plots; (ii) we weighed the "technical sand" by 100 g, packed it in non-woven material and buried it in the soil to a depth of 7-10 cm. Two years later, we dug up the bags with waste and weighed them. The analyses were performed by inductively coupled plasma mass spectrometry using Elan-9000 ICP mass spectrometer. As a result of the research, it was found that waste loses 11% mass over 2 years of being in forest soils. The content of Zn, As, Cd, and Se changes most strongly. The difference in the degree of element migration from the "technical sand" to the brown forest soils of the two forest types and clear-cuttings was revealed. The study of the effect of technogenic waste on the dominant and diagnostic species of grassy vegetation in the selected forest ecosystems of the Middle Urals was carried out. There was no negative effect on the qualitative composition of the grassy layer of two forest types and their clear-cuttings after 1 year after a single surface application of mineral waste at a concentration of 1 kg/m2.
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Affiliation(s)
- Ekaterina S Zolotova
- Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, 620016, Russia
| | - Natalya S Ivanova
- Botanical Garden of the Ural Branch RAS, Ekaterinburg, 620144, Russia
| | - Viktor F Ryabinin
- Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, 620016, Russia
| | - Sezgin Ayan
- Faculty of Forestry, Silviculture Department, Kastamonu University, Kastamonu, Turkey.
| | - Alla L Kotelnikova
- Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, 620016, Russia
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