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Recent depositional history of noble and critical elements in sediments from a wastewater-impacted bay (Vidy Bay, Lake Geneva, Switzerland)
IF 3.1 3区 地球科学
Applied Geochemistry Pub Date : 2024-11-27 DOI: 10.1016/j.apgeochem.2024.106240
Jean-Luc Loizeau , Guillaume Jiranek , Antonio Cobelo-García , Montserrat Filella
{"title":"Recent depositional history of noble and critical elements in sediments from a wastewater-impacted bay (Vidy Bay, Lake Geneva, Switzerland)","authors":"Jean-Luc Loizeau ,&nbsp;Guillaume Jiranek ,&nbsp;Antonio Cobelo-García ,&nbsp;Montserrat Filella","doi":"10.1016/j.apgeochem.2024.106240","DOIUrl":"10.1016/j.apgeochem.2024.106240","url":null,"abstract":"<div><div>Opposing trends in environmental pollution have been observed in recent years, with a growing awareness of the need to reduce emissions to the environment being accompanied by a concomitant increase in the use of polluting substances, which can potentially end up in the environment and harm humans and ecosystems. In order to assess the temporal evolution of loadings of seldom monitored trace elements, including noble metals and some technology critical elements, we analyzed a sediment core taken from the Bay of Vidy (Lake Geneva), impacted by the effluent of an urban wastewater treatment plant (WWTP). The temporal profiles of the chemical elements show essentially two patterns linked to the implementation of the WWTP, with some elements increasing sharply (e.g. Au, In, Ba, Sb, Sn, platinum group elements), while others (e.g. Ga, Ge, rare earth elements) show decreasing concentrations due to dilution by additional effluent particle loads. The origin of the elements showing a marked increase is attributed to local sources (photographic industry and municipal incinerator). There is (still?) no evidence in the sedimentary record of concentration increases linked to the growing use of technologically critical elements by industry.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"178 ","pages":"Article 106240"},"PeriodicalIF":3.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rare earth element (REE) speciation in municipal solid waste incineration ash
IF 3.1 3区 地球科学
Applied Geochemistry Pub Date : 2024-11-27 DOI: 10.1016/j.apgeochem.2024.106239
Yinghao Wen , Lei Hu , Pan Liu , Qian Wang , Estefania Garcia , Weiyao Yan , Yuanzhi Tang
{"title":"Rare earth element (REE) speciation in municipal solid waste incineration ash","authors":"Yinghao Wen ,&nbsp;Lei Hu ,&nbsp;Pan Liu ,&nbsp;Qian Wang ,&nbsp;Estefania Garcia ,&nbsp;Weiyao Yan ,&nbsp;Yuanzhi Tang","doi":"10.1016/j.apgeochem.2024.106239","DOIUrl":"10.1016/j.apgeochem.2024.106239","url":null,"abstract":"<div><div>A robust and sustainable supply of rare earth elements (REE) is critically needed for clean-energy technologies, which has stimulated substantial interests in REE recovery from waste streams. Municipal solid waste incineration ash (MSWIA) was recently recognized as a potentially important REE resource, yet REE speciation in MSWIA remains poorly understood. This study employed synchrotron X-ray spectroscopy and microscopy techniques to elucidate the speciation of representative REE (Y, Ce, and Nd) in different MSWIA samples. Linear combination fitting of bulk X-ray absorption near edge structure (XANES) data indicated that Y-bearing Al/Fe oxides and phosphates are the primary Y-hosting phases. Micro-XANES of individual Y-containing particles identified by micro X-ray fluorescence (μXRF) mapping revealed notably different Y speciation at micro-scale from the bulk, consistent with the highly heterogeneous nature of MSWIA samples. The main REE-bearing phases in different size-fractionated MSWIA are similar: Y and Nd as oxides and xenotime/monazite, and Ce as apatite and monazite. Our results provide important insights for designing pre-screening processes (e.g., density separation) and optimizing extraction methods (e.g., pH, use of ligands) for cost-effective REE recovery from MSWIA.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"178 ","pages":"Article 106239"},"PeriodicalIF":3.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of landscape impact on snow chemical composition in terms of mineral geochemical exploration
IF 3.1 3区 地球科学
Applied Geochemistry Pub Date : 2024-11-26 DOI: 10.1016/j.apgeochem.2024.106238
Igor S. Sobolev , Roman Yu Gavrilov , Egor G. Yazikov , Mikhail P. Tentyukov , Irina A. Matveenko , Albina А. Khvashchtvskaya , Nadezhda P. Soboleva , Viktor S. Buchelnikov
{"title":"Assessment of landscape impact on snow chemical composition in terms of mineral geochemical exploration","authors":"Igor S. Sobolev ,&nbsp;Roman Yu Gavrilov ,&nbsp;Egor G. Yazikov ,&nbsp;Mikhail P. Tentyukov ,&nbsp;Irina A. Matveenko ,&nbsp;Albina А. Khvashchtvskaya ,&nbsp;Nadezhda P. Soboleva ,&nbsp;Viktor S. Buchelnikov","doi":"10.1016/j.apgeochem.2024.106238","DOIUrl":"10.1016/j.apgeochem.2024.106238","url":null,"abstract":"<div><div>In areas with cold climate seasonal snowpack is an attractive sampling material for geochemical exploration of deep mineral accumulations. However, previous studies on assessment of exploration efficiency of snow cover have paid little attention to snow composition variability conditioned by local landscape structure.</div><div>The layered sampling of snow sections was performed in different landscape settings of the local area. The research area is characterized by the absence of ore mineralization zones and low anthropogenic load. The physical-chemical parameters and concentration of wide range of elements were identified in snowmelt. Multi-component data was integrated by means of factor principal component analysis. Besides, additive and differential geochemical indexes were used. The classification snow models were developed using hierarchical cluster analysis. The variance of chemical elements distribution and factor models of geochemical pattern were compared before and after reduction of background fluctuation. In terms of variation coefficient values of chemical elements the area has background parameters of chemical inhomogeneity. In total variance a lateral component prevails over a vertical one. The highest concentrations of chemical elements were found in snow section of forest landscape. It is necessary to take into account the fact of geochemical background fluctuation when interpreting the data of metal assay snow survey.</div><div>After the reduction of lateral geochemical background fluctuation, the factor model has better classified the chemical elements in terms of their connection with soluble and insoluble occurrence forms. The values of differential index of liquid and solid phases have a similar satisfactory vertical variability in different landscapes. The analysis of chemical elements concentration reveals snow horizons that were or are affected by thaw and percolating water. The snow bottom layer, which is sampled at geochemical exploration, is not strong influenced by elution.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"178 ","pages":"Article 106238"},"PeriodicalIF":3.1,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radionuclide release from spent nuclear fuel in sealed glass ampoules
IF 3.1 3区 地球科学
Applied Geochemistry Pub Date : 2024-11-25 DOI: 10.1016/j.apgeochem.2024.106234
Lena Z Evins , Charlotta Askeljung , Alexandre Barreiro Fidalgo , Anders Puranen , Olivia Roth , Kastriot Spahiu
{"title":"Radionuclide release from spent nuclear fuel in sealed glass ampoules","authors":"Lena Z Evins ,&nbsp;Charlotta Askeljung ,&nbsp;Alexandre Barreiro Fidalgo ,&nbsp;Anders Puranen ,&nbsp;Olivia Roth ,&nbsp;Kastriot Spahiu","doi":"10.1016/j.apgeochem.2024.106234","DOIUrl":"10.1016/j.apgeochem.2024.106234","url":null,"abstract":"<div><div>Radiation from spent nuclear fuel affects the redox chemistry of water in the proximity of the fuel surface. The overall effect of the radiolysis is oxidizing so that U(IV) in the spent nuclear fuel is oxidized to U(VI). The dissolution of U(VI) is relatively fast, especially when the water contains bicarbonate. Based on this, radiolytic oxidation is considered the main driving force for spent fuel dissolution and radionuclide release in a spent fuel repository environment, and many studies over the years have aimed to further our understanding of this process and how it is influenced by available redox active components in open and closed systems. Here, data from sealed glass ampoules in which spent fuel is leached for one and five years, are compared with published data from a previous similar experiment. With regards to evolution of radiolytic gases, the results are comparable to the results from the previous experiments: a steady state with regards to oxygen and hydrogen composition is observed. An unexpected observation is that some ampoules with old, pre-oxidized fragments produced less radiolytic gases. These older fragments release a larger fraction of the radionuclide inventory of the samples, yielding concentrations that are on the same level as previously published data. The data from the old fragments presented here are affected by the pre-oxidation and prolonged washing procedure, which confounds the interpretation of those data. New, recently prepared fragments yield data that are easier to interpret. The radionuclide concentrations in the ampoules with new fragments are much lower; uranium concentrations of ca 5E-6 M after one year, and ca 3E-5 M after five years. Using the calculated radionuclide inventory in the fuel samples, an apparent radionuclide release rate in these initially anoxic systems, based on U release, is ca 3E-5 per year.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"178 ","pages":"Article 106234"},"PeriodicalIF":3.1,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Geochemical constraints on weathering and provenance of stream sediments from Bat Xat, northwestern Vietnam 越南西北部 Bat Xat 溪流沉积物风化和成因的地球化学制约因素
IF 3.1 3区 地球科学
Applied Geochemistry Pub Date : 2024-11-22 DOI: 10.1016/j.apgeochem.2024.106235
Anh Tuan Tran , Dung Chi Nguyen , Dung Thi Pham , Tha Van Hoang , Dang Thanh Pham , Qua Xuan Nguyen , Ha Van Vu , Tuan Minh Dang , Tuan Dang Tran , Tai Trong Nguyen , Tra Thu Thi Doan , Thang Sy Cu , Quan Tran Dang , Cong Quoc Tran , Lien Phuong Thi Pham
{"title":"Geochemical constraints on weathering and provenance of stream sediments from Bat Xat, northwestern Vietnam","authors":"Anh Tuan Tran ,&nbsp;Dung Chi Nguyen ,&nbsp;Dung Thi Pham ,&nbsp;Tha Van Hoang ,&nbsp;Dang Thanh Pham ,&nbsp;Qua Xuan Nguyen ,&nbsp;Ha Van Vu ,&nbsp;Tuan Minh Dang ,&nbsp;Tuan Dang Tran ,&nbsp;Tai Trong Nguyen ,&nbsp;Tra Thu Thi Doan ,&nbsp;Thang Sy Cu ,&nbsp;Quan Tran Dang ,&nbsp;Cong Quoc Tran ,&nbsp;Lien Phuong Thi Pham","doi":"10.1016/j.apgeochem.2024.106235","DOIUrl":"10.1016/j.apgeochem.2024.106235","url":null,"abstract":"<div><div>The stream sediment samples collected from the Bat Xat district in Vietnam have been studied to establish their geochemical characteristics, provenance, weathering intensity, and climate. This comprehensive investigation included major, trace, and rare earth elements (REEs). The sediments were classified as greywacke, lithicarenite, and arkose, denoting compositionally immature deposits. The sediments exhibited moderate chemical weathering in the source domain, with a CIA average value of 67.01, PIA of 73.58, and ICV of 1.05. This suggests a depositional environment influenced by humid climatic conditions attributed to the attenuation of the Indian summer monsoon. The trace element and REE geochemistry of the Bat Xat sediments symbolize their characteristic signatures, with REE patterns mirroring those of their origins. The initial source materials are primarily associated with felsic rocks, with a smaller contribution from sedimentary and metamorphosed sedimentary rocks in the study area. Geochemical characteristics are large fluctuations in Eu/Eu∗ values and high (Gd/Yb)<sub>N</sub> ratios. We assume that Bat Xat sediments originated from the exhumated Archean crystalline basement or mixed rocks of the Archean component.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"177 ","pages":"Article 106235"},"PeriodicalIF":3.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of cellulose degradation products on 63Ni sorption on Portland cement
IF 3.1 3区 地球科学
Applied Geochemistry Pub Date : 2024-11-22 DOI: 10.1016/j.apgeochem.2024.106237
Delphine Durce, Lian Wang, Nele Bleyen, Marc Van Gompel
{"title":"Effect of cellulose degradation products on 63Ni sorption on Portland cement","authors":"Delphine Durce,&nbsp;Lian Wang,&nbsp;Nele Bleyen,&nbsp;Marc Van Gompel","doi":"10.1016/j.apgeochem.2024.106237","DOIUrl":"10.1016/j.apgeochem.2024.106237","url":null,"abstract":"<div><div>Concepts of nuclear waste repositories make use of large quantities of cementitious materials, especially near surface disposal facilities in which cement, mortar, and concrete are used both as structural materials and waste immobilization matrices. The retardation of radionuclides by the cementitious barriers of these repositories is crucial for the safe long-term management of the waste. Yet both the degradation of the cementitious materials and the presence of complexing ligands originating from the waste can affect the sorption of radionuclides. Cellulosic materials present in nuclear waste degrade under irradiation and under the alkaline conditions generated by the cementitious materials and they release organic compounds. Within the cellulose degradation products, α-isosacharinic acid (α-ISA) is generally assumed to be the strongest radionuclide complexant and to have the most impact on radionuclide sorption, though the presence of other ligands in the mixture could also have an effect. In this work, the sorption of <sup>63</sup>Ni was assessed on fresh and state III hardened cement paste (HCP). The effect of α-ISA on the <sup>63</sup>Ni sorption at these two degradation states was investigated and compared to the effect of a complete mixture of cellulose degradation products generated by irradiation and alkaline degradation of cellulosic tissues. A higher sorption of <sup>63</sup>Ni was observed on state III HCP (<em>R</em><sub><em>d</em></sub> = (8.6 ± 3.3) × 10<sup>3</sup> L/kg) than on fresh HCP (<em>R</em><sub><em>d</em></sub> = (1.0 ± 0.3) × 10<sup>3</sup> L/kg), and, in both cases, the sorption was higher than previously observed on pure C–S–H (calcium silicate hydrate) suggesting the involvement of other mechanisms than the sole surface complexation on C–S–H. The effect of α-ISA on the sorption of <sup>63</sup>Ni depended on the cement degradation state, ranging from no effect on fresh cement to a maximal sorption reduction factor of 8 ± 3 on degraded cement for 10<sup>−2</sup> M α-ISA. The effect of the mixture of degradation products from cellulosic tissues on the sorption of <sup>63</sup>Ni was found to be considerably higher on both fresh and degraded HCP, with a sorption reduction factor of 582 ± 972 and 718 ± 327 for the fresh and degraded cement, respectively, for a corresponding α-ISA concentration of 10<sup>−2</sup> M.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"178 ","pages":"Article 106237"},"PeriodicalIF":3.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Deciphering diverse colonization patterns of plastisphere generalists and specialists in greenhouse soils 解密温室土壤中质体通才和专才的不同定植模式
IF 3.1 3区 地球科学
Applied Geochemistry Pub Date : 2024-11-22 DOI: 10.1016/j.apgeochem.2024.106236
Caixia Wang , Miao Gao , Xiangfeng Zeng , Yongfeng Jia
{"title":"Deciphering diverse colonization patterns of plastisphere generalists and specialists in greenhouse soils","authors":"Caixia Wang ,&nbsp;Miao Gao ,&nbsp;Xiangfeng Zeng ,&nbsp;Yongfeng Jia","doi":"10.1016/j.apgeochem.2024.106236","DOIUrl":"10.1016/j.apgeochem.2024.106236","url":null,"abstract":"<div><div>Studies on the plastisphere mainly focus on the overall microbial community, neglecting the nuanced difference of its generalist and specialist subcommunities. To elucidate the intricacies of these subcommunities, we analyzed plastic films residues from greenhouse soils. The results revealed that the plastisphere influenced alpha-diversities of bacterial and fungal generalist subcommunities but not their specialist subcommunities. Stochastic processes governed the assembly of bacterial and fungal generalist and specialist subcommunities in plastisphere and surrounding soil, with the plastisphere intensifying the role of stochastic process, particularly in the assembly of generalist subcommunities. Furthermore, the species dispersal of bacterial and fungal generalist and specialist subcommunities was more extensive within plastisphere than in surrounding soil; however, in the biotic networks, the node ratio of bacterial and fungal specialists decreased in plastisphere compared to surrounding soils. Furthermore, the plastisphere diminished the significance of both generalists and specialists in sustaining network stability based on the topological parameters. Plastisphere induced significant enrichment of fungal pathogens, suggesting that plastic film may pose risk to plant performance and soil health. These results broaden our understanding of how plastisphere-induced interference affects generalist and specialist microorganisms, potentially highlighting the need for improved residue management to sustain ecosystem health and function.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"177 ","pages":"Article 106236"},"PeriodicalIF":3.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The human health risks and corresponding body thresholds of OCPs and PCBs in the Tibetan Plateau 青藏高原 OCPs 和 PCBs 对人类健康的危害及相应的人体阈值
IF 3.1 3区 地球科学
Applied Geochemistry Pub Date : 2024-11-20 DOI: 10.1016/j.apgeochem.2024.106221
Huike Dong , Xinyue Liu , Lei Chai , Xiaoping Wang , Ping Gong , Chuanfei Wang , Yunqiao Zhou , Jiamin Zeng , Xuerui Niu
{"title":"The human health risks and corresponding body thresholds of OCPs and PCBs in the Tibetan Plateau","authors":"Huike Dong ,&nbsp;Xinyue Liu ,&nbsp;Lei Chai ,&nbsp;Xiaoping Wang ,&nbsp;Ping Gong ,&nbsp;Chuanfei Wang ,&nbsp;Yunqiao Zhou ,&nbsp;Jiamin Zeng ,&nbsp;Xuerui Niu","doi":"10.1016/j.apgeochem.2024.106221","DOIUrl":"10.1016/j.apgeochem.2024.106221","url":null,"abstract":"<div><div>Although organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) have been banned or restricted for years, they remain significant contaminants posing health risks in some places where are favorable for their enrichment, such as areas with high latitude or altitudes. However, the elucidation of environmental risks and the establishment of a clear relationship between these risks and human health are areas that remain significantly underdeveloped. Literatures on the concentrations of OCPs and PCBs in soil of the Tibetan Plateau were reviewed to calculate local health risk indexes and create risk maps. A food chain model (ACC-Human) was applied to predict human body concentrations of these chemicals. Higher risk areas are located in the southeastern Tibetan Plateau, suggesting influences from potential emissions in adjacent regions and long-range transport. Based on the concentration-risk relationships, the most toxic chemicals identified were PCBs, with a body concentration threshold as low as 13 ng/g lipid. Given the ongoing emissions from industrial production or historical legacy, it is hightime to lay a particular focus on PCBs in mountainous areas like the Tibetan Plateau.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"177 ","pages":"Article 106221"},"PeriodicalIF":3.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Contributions of mineral and organic cement agents to soil aggregation under potato production in Eastern Canada 加拿大东部马铃薯生产中矿物和有机胶结剂对土壤团聚的贡献
IF 3.1 3区 地球科学
Applied Geochemistry Pub Date : 2024-11-20 DOI: 10.1016/j.apgeochem.2024.106233
Haixiao Li , Yan Xu , Noura Ziadi , Léon E. Parent
{"title":"Contributions of mineral and organic cement agents to soil aggregation under potato production in Eastern Canada","authors":"Haixiao Li ,&nbsp;Yan Xu ,&nbsp;Noura Ziadi ,&nbsp;Léon E. Parent","doi":"10.1016/j.apgeochem.2024.106233","DOIUrl":"10.1016/j.apgeochem.2024.106233","url":null,"abstract":"<div><div>Soil aggregation, a critical determinant of soil health and quality, results from the bonding of soil particles by various cementing agents, such as soil organic carbon, biota, ionic bridging, clay, and carbonates. This process varies across soil profiles due to agricultural practices and weathering disturbances. In this study, we analyzed the contribution of different cementing agents to soil aggregation within three soil horizons (Ap1, Ap2, and B) in potato production in Eastern Canada. We collected soil samples from 29 sites in Quebec Province for aggregate-size distribution analysis and cementing agent determination. Our findings reveal variations in aggregate proportions among the horizons, with horizon B exhibiting a smaller proportion of 2–4.75 mm aggregates (10.42%) compared to horizons Ap1 and Ap2 (20.28% and 18.71%, respectively). The hierarchy of cementing agents' impact on soil aggregation ranks polyvalent metals as the most influential, followed by organic matter (C&amp;N) and silts and clays. However, accurately estimating aggregate stability through regression analysis based on these selected cementing agents remains challenging.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"177 ","pages":"Article 106233"},"PeriodicalIF":3.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fluid geochemical constraints on the geological genesis of carbonate geothermal systems: A case study of Quzhuomu in southern Tibet, China 流体地球化学对碳酸盐岩地热系统地质成因的制约:中国西藏南部曲珠穆案例研究
IF 3.1 3区 地球科学
Applied Geochemistry Pub Date : 2024-11-14 DOI: 10.1016/j.apgeochem.2024.106222
Hongjie Shi , Mingliang Liu , Xing Wei , Ke Wang , Lizhen Huang , Yuanyuan Cao , Yanlong Kong
{"title":"Fluid geochemical constraints on the geological genesis of carbonate geothermal systems: A case study of Quzhuomu in southern Tibet, China","authors":"Hongjie Shi ,&nbsp;Mingliang Liu ,&nbsp;Xing Wei ,&nbsp;Ke Wang ,&nbsp;Lizhen Huang ,&nbsp;Yuanyuan Cao ,&nbsp;Yanlong Kong","doi":"10.1016/j.apgeochem.2024.106222","DOIUrl":"10.1016/j.apgeochem.2024.106222","url":null,"abstract":"<div><div>The southern Tibet in China is characterized by the widespread distribution of high-temperature geothermal systems that possess significant potential for development and utilization. However, current studies in this area have been predominantly focused on geothermal systems with felsic rock reservoirs, while studies on geothermal systems with carbonate reservoirs are scarce. Thus, the large-scale exploitation of such geothermal resources remains limited. In this study, we selected the typical carbonate geothermal system of Quzhuomu in southern Tibet as the research object. Based on the hydrochemical and isotopic (δD, δ<sup>18</sup>O, δ<sup>13</sup>C, δ<sup>34</sup>S, and δ<sup>11</sup>B) characteristics of the geothermal water, we investigated the geochemical origin of Quzhuomu geothermal water, evaluated the reservoir temperature of the geothermal system, identified its heat source, and ultimately proposed a genetic mechanism for the geothermal system. The chemical components of the geothermal water showed that it primarily originated from the dissolution of marine carbonate rocks and tourmaline granite. Further, an improved mineral assemblage geothermometer showed that the reservoir temperature varied in the range 118–150 °C (mean, 128 °C). Comparative analysis between a typical magmatic geothermal system, the Gudui system, which is also located in the Sangri–Cuona rift zone, and the Quzhuomu system revealed that the strong surface geothermal manifestations and high reservoir temperature in Quzhuomu are closely related to a deep-seated magma chamber. However, the hydrochemical composition of the Quzhuomu geothermal water is not influenced by the magmatic fluids differentiated from the magma. These findings are of great significance with respect to the scientific and rational utilization of geothermal resources in the Quzhuomu geothermal field as they provide valuable insights for estimating the reservoir temperature of carbonate geothermal systems like the Quzhuomu system and investigating their genetic mechanisms.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"177 ","pages":"Article 106222"},"PeriodicalIF":3.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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