Applied Geochemistry最新文献

{"title":"Towards a definition of a spatial geochemical compatibility: workflow, validation, and application","authors":"Marino Vetuschi Zuccolini ,&nbsp;Simone Pittaluga ,&nbsp;Marianna Miola","doi":"10.1016/j.apgeochem.2024.106260","DOIUrl":"10.1016/j.apgeochem.2024.106260","url":null,"abstract":"<div><div>Decision-making in environmental monitoring and remediation is heavily influenced by technical and regulatory tools. However, these tools often fail to take full account of the spatial heterogeneity of geological matrices. This diffuse behavior results in an ineffective approach to managing local environmental characteristics. To address this issue, stochastic geochemical modelling allows for more informed management of remediation thresholds by quantifying the spatial uncertainty of a regionalized variable. In this context, our research aims to explore the concept of geochemical compatibility of a matrix using a stochastic approach. In particular, the spatial geochemical compatibility (SGC) of stream sediments will be investigated using a tailored processing workflow to ensure <em>a priori</em> data quality control. The proposed workflow formalises a multi-step computational pipeline that includes the definition of computational domains, the implementation of geostatistical techniques and the performance checking of the stochastic model. The application of the pipeline provides a digital stochastic-based representation of the uncertainty about stream sediments of a heterogeneous area for 34 elements.</div><div>For each element, 8 layers summarize as many statistical indices as are extracted from the local cumulative probability density functions. The pipeline has been validated by testing it in the heterogeneous mountainous area of the Liguria region (Italy) and a multilayer high-resolution (200 m) geochemical numerical model (GNM-L) has been generated. This model is starting from 2021 publicly distributed and used as a decision support tool for <span>SGC</span> in routine regulatory and monitoring practice. It empowers the community with geochemical knowledge and helps local decision makers to understand and use the concept of environmental uncertainty. Deep control over each computational step and quality control of performance suggests how the pipeline can be generalized in complex areas, from single catchments to entire countries, and for different regionalized variables.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"179 ","pages":"Article 106260"},"PeriodicalIF":3.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160668","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}

{"title":"Internal loading of antimony from mining contaminated sediments under oxic conditions","authors":"Kuzey Güneşli ,&nbsp;John Chételat ,&nbsp;Michael J. Palmer ,&nbsp;Katrina Paudyn ,&nbsp;Brittany Astles ,&nbsp;Heather Jamieson","doi":"10.1016/j.apgeochem.2024.106272","DOIUrl":"10.1016/j.apgeochem.2024.106272","url":null,"abstract":"<div><div>The environmental fate of antimony (Sb) in aquatic ecosystems has been less studied compared to other metal(loid)s released by mining. This study investigated Sb flux from lake sediments of Yellowknife Bay (Great Slave Lake, Northwest Territories, Canada), which were contaminated by gold mining operations. Sediment Sb fluxes were measured in the field by short term (2–6 day) incubations of intact sediment cores and in the laboratory by incubating bulk sediment over a longer 30-day period. Antimony diffusion from sediment to overlying water was observed in 17 of 28 intact cores (61%), with flux rates ranging from 10 to 279 μg/m²/day. Overlying water and surface sediment remained oxic during the field measurements. Sediment Sb concentration (0.7–47 μg/g) was positively correlated with Sb flux, and the mineralogy of the sediment, characterized in a companion study, likely influenced flux spatial patterns. Other environmental factors, specifically season, temperature, organic matter content, and iron or manganese concentrations of sediment did not explain Sb flux. Porewater Sb concentrations were low (0.2–9.6 μg/L), and porewater depth profiles were not related to solid-phase Sb concentration, suggesting limited post-depositional mobility within sediments. Laboratory incubation of mixed bulk sediments showed higher Sb fluxes of 185–1555 μg/m²/day over the course of a 30-day experiment. Temperature warming from 7 to 22 °C did not enhance the Sb flux. Higher Sb fluxes in the laboratory versus field measurements may have been due to (i) more Sb in the laboratory sediments (∼160 μg/g), and (ii) oxidative dissolution of stibnite and Sb sulfosalt minerals that were previously stable in deeper anoxic sediments but disturbed and exposed to oxygen during laboratory manipulation. This study demonstrated that Sb can diffuse from mining-contaminated sediments into overlying water under oxic conditions, with fluxes influenced by sediment Sb concentrations and mineralogy.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"179 ","pages":"Article 106272"},"PeriodicalIF":3.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160670","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}

{"title":"Site-specific structure and energetics of uranyl adsorption at hydrated muscovite (001) surfaces probed by classical molecular dynamics simulations","authors":"Narasimhan Loganathan ,&nbsp;Andrey G. Kalinichev","doi":"10.1016/j.apgeochem.2024.106255","DOIUrl":"10.1016/j.apgeochem.2024.106255","url":null,"abstract":"<div><div>A new series of molecular dynamics (MD) simulations of the Cs⁺ and UO₂²⁺ adsorption on the basal (001) surface of muscovite from relatively low concentration aqueous solutions demonstrates both ions are preferably adsorbed near the centers ditrigonal cavities on this surface. A more realistic random distribution of isomorphic Al/Si substitutions in the muscovite structure allowed us to identify three types of surface adsorption sites somewhat differing in their composition, structure, and local charge distribution. UO₂²⁺ ions are preferably adsorbed as outer-sphere surface complexes with one H₂O molecule in their hydration shell acting as a bridge to the surface. Adsorption free energies for UO₂²⁺ ions at each of the three different adsorption sites were obtained via potential of mean force (PMF) calculations. These adsorption free energy profiles as a function of distance along the direction normal to the surface indicate that UO₂²⁺ ions at two the adsorption sites exhibit only stable OS surface complexes with energy minimum around −26 kJ/mol. At the same time at the third adsorption site, that was not observed and studied in earlier simulations, an inner-sphere surface complex is identified with an energy minimum almost twice as deep as the outer-sphere complexes at the two other adsorption sites. Significant agreement of the present results with available experimental data and results of other MD simulations is also demonstrated, while the sources of observed disagreements and inconsistencies are identified and discussed in detail.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"178 ","pages":"Article 106255"},"PeriodicalIF":3.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165380","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}

{"title":"Distribution and evaporation characteristics of Rb and Cs in complex salt brine systems","authors":"Shouyan Huang ,&nbsp;Yanfang Ma ,&nbsp;Xin Liu ,&nbsp;Xiuzhen Ma ,&nbsp;Zhenhai Fu","doi":"10.1016/j.apgeochem.2024.106216","DOIUrl":"10.1016/j.apgeochem.2024.106216","url":null,"abstract":"<div><div>The brine in salt lakes is rich in resources, including not only K, Mg, and B, but also valuable trace elements. During the enrichment and extraction of trace elements (Rb, Cs) from carbonate type salt lake brines, the process is significantly influenced by the presence of other coexisting ions such as Li⁺, K⁺, and Mg²⁺.The physical and chemical properties of K⁺ are extremely similar to those of Rb⁺ and Cs⁺, and its impact on the extraction of Rb⁺ and Cs⁺ is particularly significant. When K⁺, Rb⁺, and Cs⁺ coexist, they can form solid solutions such as [(K, Rb)₂SO₄], [(K, Cs)₂SO₄], and [(Rb, Cs)₂SO₄]. The formation of these solid solutions can lead to severe losses of Rb and Cs during the evaporation process of the brine, resulting in low yield. In response to the aforementioned issues regarding the evaporation process of Rb and Cs, this paper uses the aqueous-salt system phase diagram as a guide and combines experimental research with simulation calculations to study the enrichment patterns of trace elements Rb and Cs in the Na⁺, K⁺//Cl⁻, CO₃²⁻, SO₄^2--H₂O aqueous-salt system, as well as the migration mechanism of Rb and Cs.</div></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"178 ","pages":"Article 106216"},"PeriodicalIF":3.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165381","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}

{"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}

{"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}

{"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}

{"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}

{"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)_N 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}

{"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 ⁶³Ni was assessed on fresh and state III hardened cement paste (HCP). The effect of α-ISA on the ⁶³Ni 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 ⁶³Ni was observed on state III HCP (<em>R</em>_<em>d</em> = (8.6 ± 3.3) × 10³ L/kg) than on fresh HCP (<em>R</em>_<em>d</em> = (1.0 ± 0.3) × 10³ 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 ⁶³Ni 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 10⁻² M α-ISA. The effect of the mixture of degradation products from cellulosic tissues on the sorption of ⁶³Ni 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 10⁻² 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}