Clay Minerals最新文献_第7页

Impaired Hearing in MELAS. MELAS患者的听力受损。

4区地球科学

Clay Minerals Pub Date : 2022-05-01 DOI: 10.5152/iao.2022.22750

Josef Finsterer

{"title":"Impaired Hearing in MELAS.","authors":"Josef Finsterer","doi":"10.5152/iao.2022.22750","DOIUrl":"10.5152/iao.2022.22750","url":null,"abstract":"We read with interest the article by Crundwell et al 1 about 2 patients with mitochondrial encephalopathy, lactic acidosis, and stroke-like episodes (MELAS) syndrome who manifested clinically with bilateral sensorineural hearing impairment after speech development and significantly profited from unilateral implantation of a2 cochlea implant. 1 In patient 1 (53-year-old male), MELAS was found to be due to the variant m.3243A > G in MT-TL1 and in patient 2 (47-year-old male), the genetic cause of MELAS was unknown. 1 The study is appealing but has some limitations that raise concerns which need to be discussed. We disagree with the statement in the abstract that MELAS is the most common mitochondrial disorder (MID). 1 There are only few data available on the epidemiology of MIDs. 2 However, the few data reported in the literature and our own experiences suggest that non-syndromic MIDs prevail when compared with syndromic MIDs, such as MELAS. Furthermore, we do not agree with the statement in the introduction that MELAS is characterized by myelopathy and respiratory insufficiency. 1 Myelopathy is not a typical phenotypic feature of MELAS and has been only rarely reported in these patients. 3 Myelopathy is more common in leukoencephalopathy with brainstem and spinal cord involvement and lactate elevation (LBSL), a syndromic MID, in which myelopathy is a pathognomonic feature of the disease. 4 Respiratory insufficiency may develop in MELAS only in the case of affection of the respiratory muscles, the brainstem, or the lungs. It is contradictory to state that the diagnosis of MELAS was genetically confirmed and to state, at the same time, that the causative mtDNA variant","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"29 1","pages":"276-277"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10682798/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88223886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

CLM volume 57 issue 1 Cover and Back matter CLM第57卷第1期封面和封底

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2022-03-01 DOI: 10.1180/clm.2022.32

引用次数: 0

A deep learning neural network approach for predicting the factors influencing heavy-metal adsorption by clay minerals 粘土矿物吸附重金属影响因素预测的深度学习神经网络方法

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2022-03-01 DOI: 10.1180/clm.2022.20

R. Liu, Lei Zuo, Jiajia Zhao, D. Tao

{"title":"A deep learning neural network approach for predicting the factors influencing heavy-metal adsorption by clay minerals","authors":"R. Liu, Lei Zuo, Jiajia Zhao, D. Tao","doi":"10.1180/clm.2022.20","DOIUrl":"https://doi.org/10.1180/clm.2022.20","url":null,"abstract":"Abstract The treatment of water containing heavy metals has attracted increasing attention because the ingestion of such water poses risks to human health. Due to their relatively large specific surface areas and surface charges, clay minerals play a significant role in the adsorption of heavy metals in water. However, the major factors that influence the adsorption rates of clay minerals are not well understood, and thus methods to predict the sorption of heavy metals by clay minerals are lacking. A method that can identify the most appropriate clay minerals for removal of a given heavy metal, based on the predicted sorption of the clay minerals, is required. This paper presents a widely applicable deep learning neural network approach that yielded excellent predictions of the influence of the sorption ratio on the adsorption of heavy metals by clay minerals. The neural network model was based on datasets of heavy-metal parameters that are available generally. It yielded highly accurate predictions of the adsorption rate based on training data from the dataset and was able to account for a wide range of input parameters. A Pearson sensitivity analysis was used to determine the contributions of individual input parameters to the adsorption rates predicted by the neural network. This newly developed method can predict the major factors influencing heavy-metal adsorption rates. The model described here could be applied in a wide range of scenarios.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"57 1","pages":"70 - 76"},"PeriodicalIF":1.5,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42785919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Assessing trace-element mobility during alteration of rhyolite tephra from the Dinaride Lake System using glass-phase and clay-separate laser ablation inductively coupled plasma mass spectrometry 使用玻璃相和粘土分离激光烧蚀电感耦合等离子体质谱法评估Dinaride湖系统流纹岩-火山灰岩蚀变过程中的微量元素迁移率

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2022-03-01 DOI: 10.1180/clm.2022.12

L. Badurina, B. Šegvić

{"title":"Assessing trace-element mobility during alteration of rhyolite tephra from the Dinaride Lake System using glass-phase and clay-separate laser ablation inductively coupled plasma mass spectrometry","authors":"L. Badurina, B. Šegvić","doi":"10.1180/clm.2022.12","DOIUrl":"https://doi.org/10.1180/clm.2022.12","url":null,"abstract":"Abstract This paper reports a novel approach in the study of trace-element mobility during the argillization of volcanic glass that is based on in situ laser ablation inductively coupled plasma mass spectrometry glass analyses and that of spatially related illite-smectite collected in the form of fraction separates. The material studied originates from lacustrine sediments of the Dinaride Lake System that bear evidence of intensive weathering of distal tephra during the Miocene climatic optimum. Yttrium and HREE were probably mobilized from decomposing glass in the form of carbonate complexes and were consequently depleted significantly in the clays studied. On the other hand, the Mg-rich illite-smectite demonstrates an elevated adsorption potential of solvated LREE complexes. This may be explained through clay surface geochemistry controlled largely by Mg for Al octahedral substitution. This paper highlights the role of eogenetic 2:1 clay aluminosilicates that, under favourable geological conditions, may be conducive to secondary REE enrichment and the formation of potential ion adsorption-type deposits.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"57 1","pages":"1 - 6"},"PeriodicalIF":1.5,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45287091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 4

Engineering clay minerals to manage the functions of soils 工程粘土矿物来管理土壤的功能

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2022-03-01 DOI: 10.1180/clm.2022.19

Menghan Yu, Sarwar Muhammad Tariq, Huaming Yang

引用次数: 3

Removal of ivermectin from aqueous media using commercial, bentonite-based organophilic clay as an adsorbent 使用商业膨润土基有机粘土作为吸附剂从水性介质中去除伊维菌素

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2022-03-01 DOI: 10.1180/clm.2022.16

R. P. Nippes, P. D. Macruz, Thaísa Frossard Coslop, Deise Molinari, M. H. N. O. Scaliante

{"title":"Removal of ivermectin from aqueous media using commercial, bentonite-based organophilic clay as an adsorbent","authors":"R. P. Nippes, P. D. Macruz, Thaísa Frossard Coslop, Deise Molinari, M. H. N. O. Scaliante","doi":"10.1180/clm.2022.16","DOIUrl":"https://doi.org/10.1180/clm.2022.16","url":null,"abstract":"Abstract The worldwide use of pharmaceuticals is of concern to those researchers who develop new techniques for the removal of these compounds from the aquatic medium. The objective of the present work was to characterize and evaluate the performance of a commercial, bentonite-based organophilic clay in removing ivermectin from aqueous solution. The adsorbent was characterized by nitrogen physisorption, thermogravimetric-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). Batch-scale adsorption experiments were performed to evaluate the kinetics, isotherms, thermodynamics and effect of pH on removal of this drug and reuse of the clay. The bentonite has a small specific surface area with an irregular surface. The Elovich kinetic model fits the experimental data better than other models, indicating that chemisorption contributes to drug removal in this case. The Langmuir and Sips isothermal models best fit the experimental equilibrium data. The process was shown to be favorable (ΔG°ads<0), endothermic (ΔH°ads>0), with an increase in the degrees of freedom at the solid–liquid interface (ΔS°ads>0), and with characteristics of a physical-chemical adsorption process (Ea = 11.065 kJ mol–1) under the study conditions. Adsorption was favored at the natural pH of the solution and the organophilic clay could be regenerated with water and reused in consecutive adsorption cycles. The amount of ivermectin adsorbed on the organophilic clay ranged from 1.78 to 3.88 mg g–1. The organophilic clay was shown to be a cost-effective potential adsorbent for ivermectin-contaminated water-treatment applications.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"57 1","pages":"21 - 30"},"PeriodicalIF":1.5,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46884436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Adsorption of crystal violet on kaolinite clay: kinetic and equilibrium study using non-linear models 结晶紫在高岭土上吸附的动力学和平衡研究

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2022-03-01 DOI: 10.1180/clm.2022.18

A. Boukhemkhem, Bamhammed Aissa-Ouaissi-Sekkouti, J. Bedia, C. Belver, C. B. Molina

{"title":"Adsorption of crystal violet on kaolinite clay: kinetic and equilibrium study using non-linear models","authors":"A. Boukhemkhem, Bamhammed Aissa-Ouaissi-Sekkouti, J. Bedia, C. Belver, C. B. Molina","doi":"10.1180/clm.2022.18","DOIUrl":"https://doi.org/10.1180/clm.2022.18","url":null,"abstract":"Abstract This work studied the efficiency of Tamazert kaolinite clay for adsorbing the cationic dye crystal violet from an aqueous solution in a batch system. The kinetics of the process and the equilibrium of adsorption were studied using non-linear models. The characterization of Tamazert kaolinite clay showed that it has structural, textural and surface properties that are suitable for adsorption. The effects of various process parameters such as contact time, initial dye concentration, initial pH, adsorbent dose and temperature were tested. The kinetic study using non-linear regression showed that the pseudo-second order model best fitted the experimental data. The intra-particle model was also used to estimate the contribution of intra-particle diffusion to this process. The adsorption isotherms were fitted to Freundlich, Langmuir and Redlich–Peterson models, showing that the adsorption is limited to a monolayer with a monolayer adsorption capacity of 44.2 mg g–1. The thermodynamic study indicated that the process is exothermic, spontaneous and accompanied by a decrease in entropy.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"57 1","pages":"41 - 50"},"PeriodicalIF":1.5,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48187153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Mineral stabilities in soils: how minerals can feed the world and mitigate climate change 土壤中的矿物质稳定性:矿物质如何养活世界和减缓气候变化

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2022-03-01 DOI: 10.1180/clm.2022.17

D. A. C. Manning

{"title":"Mineral stabilities in soils: how minerals can feed the world and mitigate climate change","authors":"D. A. C. Manning","doi":"10.1180/clm.2022.17","DOIUrl":"https://doi.org/10.1180/clm.2022.17","url":null,"abstract":"Abstract Mineral reactions in soils demonstrably take place on a human timescale. The weathering of silicate ‘rock-forming’ minerals releases nutrients that are essential for plant growth, including silica. This process consumes CO2, which is ultimately derived from the atmosphere, through enhanced rock weathering. From a human perspective, the weathering process has two beneficial functions – crop nutrition and climate mitigation – through the removal of atmospheric CO2. By considering these as a coupled process, the release of silica during weathering can be matched to what is taken from the soil by a crop (e.g. wheat). A simple analysis shows that the amount of silica that accumulates in wheat during a 4 month growing period is readily released by the weathering of pyroxene and plagioclase, minerals that commonly occur in basaltic igneous rocks. In contrast, the dissolution rate for quartz is so low that it cannot supply the silica taken up by the crop and is inert. Similarly, dissolution of clay minerals releases sufficient silica for plant uptake. Rapid weathering of silicate minerals within soils is evident from images of surfaces of grains exposed in soils for periods of 10–100 years. The evidence for silicate rock weathering as part of the soil system that sustains humanity is provided by the vegetation that we see around us.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"57 1","pages":"31 - 40"},"PeriodicalIF":1.5,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42777443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Efficient removal of crystal violet from solution by montmorillonite modified with docosyl-trimethylammonium chloride and sodium dodecyl sulfate: modelling, kinetics and equilibrium studies 二十二烷基三甲基氯化铵和十二烷基硫酸钠改性蒙脱土有效去除溶液中结晶紫的模型、动力学和平衡研究

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2022-03-01 DOI: 10.1180/clm.2022.15

Malihe Sarabadan, H. Bashiri, S. Mousavi

{"title":"Efficient removal of crystal violet from solution by montmorillonite modified with docosyl-trimethylammonium chloride and sodium dodecyl sulfate: modelling, kinetics and equilibrium studies","authors":"Malihe Sarabadan, H. Bashiri, S. Mousavi","doi":"10.1180/clm.2022.15","DOIUrl":"https://doi.org/10.1180/clm.2022.15","url":null,"abstract":"Abstract Two novel modified montmorillonite (Mnt) components were prepared using Mnt nanoparticles and two surfactants: docosyl-trimethylammonium chloride (BTAC) and sodium dodecyl sulfate (SDS). These modified Mnts were used to remove a carcinogenic and harmful dye, crystal violet (CV), from solution. Optimization and modelling studies of the adsorption of these two modified Mnts were performed using response surface methodology. Four influential variables (concentration of adsorbent, temperature, pH and CV concentration) were studied to obtain the optimum conditions for CV removal. The optimal values of these variables for the two modified Mnts yielded 100% dye-removal efficiency. The optimum conditions for CV adsorption on Mnt-BTAC and Mnt-BTAC-SDS, respectively, are temperatures of 25.00 and 33.29°C, pH values of 9 and 10.1, CV concentrations of 50.00 and 10.44 mg L–1 and adsorbent concentrations of 1.00 and 0.98 g L–1. In equilibrium studies of the two modified Mnts, the Temkin isotherm was selected as an appropriate model, and in kinetic studies of these Mnts, the fractal-like integrated kinetics Langmuir model was found to be the best model. The Mnt-BTAC-SDS component is an affordable adsorbent with high adsorption capacity for CV.","PeriodicalId":10311,"journal":{"name":"Clay Minerals","volume":"57 1","pages":"7 - 20"},"PeriodicalIF":1.5,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41716245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

CLM volume 57 issue 1 Cover and Front matter CLM第57卷第1期封面和封面问题

IF 1.5 4区地球科学

Clay Minerals Pub Date : 2022-03-01 DOI: 10.1180/clm.2022.33

引用次数: 0