Applied Clay Science最新文献

{"title":"Design of deep eutectic solvents modified palygorskite for selective recognition, mechanism study and stable preservation of quercetin","authors":"Rongpeng Yu ,&nbsp;Qinya Huang ,&nbsp;Zhiwei Ding ,&nbsp;Yiran Li ,&nbsp;Chaoyang Li ,&nbsp;Zhanchao Liu ,&nbsp;Yan Liu","doi":"10.1016/j.clay.2024.107621","DOIUrl":"10.1016/j.clay.2024.107621","url":null,"abstract":"<div><div>Considering the effect of secondary metabolites on quercetin (QC) separation and purification in plants, herein, four types of hydrophilic deep eutectic solvents (DESs) composed by organic acids and glycosyl-, quaternary ammonium- or alcohol-based hydrogen bond acceptors were designed and modified on the palygoskite (Pal) surface to improve the selectivity of QC via dispersive solid-phase extraction (D-SPE). The selectivity study followed the following order: Pal- [Choline chloride (ChCl)] [Levulinic acid (Lev)] &gt; Pal- [Glycerol (Gly)] [L-Proline (Pro)] &gt; Pal- [Glucose (Glu)] [D-lactic acid (Lac)] &gt; Pal- [Benzyl triethyl ammonium chloride (BTBAC)] [D-lactic acid (Lac)]. Based on the single-factor method, Response surface methodology (RSM) by using a Box-Behnken design (BBD) was applied to assess the mutual interactions and effects between the three factors and the optimized preparation conditions. The optimal nanoparticles (Pal- [ChCl] [Lev]) showed the best adsorption capacity for QC (29.81 mg/g) in the mixture of methanol and phosphate buffered solution (PBS) and high selectivity which was 1.95 times and 2.12 times that of luteolin and rutin hydrate, respectively. Mechanism exploration indicated that Pal-DESs selectively adsorbed QC via electrostatic interaction, π-π stacking and hydrogen bonds. Furthermore, the screened DES of ([ChCl] [Lev]) could act on QC aqueous solution to improve its solubility and stability during preservation. The proposed QC separation strategy centered on the guiding role of DESs in selective adsorption. Additional alternatives for the synthesis of high-efficiency and hydrophilic functional adsorbents for flavonoids were made available by this green DESs regulation concept.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"262 ","pages":"Article 107621"},"PeriodicalIF":5.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of Fe-ZSM-5 zeolite from high iron-containing palygorskite with peroxidase-like catalytic performance","authors":"Fengya Ran ,&nbsp;Meng He ,&nbsp;Shiyong Sun ,&nbsp;Rui Lv ,&nbsp;Sen Lin ,&nbsp;Ke Wang ,&nbsp;Yevgeny Aleksandrovich Golubev ,&nbsp;Olga Borisovna Kotova ,&nbsp;Elena Leonidovna Kotova","doi":"10.1016/j.clay.2024.107619","DOIUrl":"10.1016/j.clay.2024.107619","url":null,"abstract":"<div><div>Zeolite products synthesized from mineral materials are receiving widespread attention, while there are few reports on the introduction of heteroatom metals from minerals into zeolites. Herein, the effects of different silicon sources, hydrothermal reaction time and the amount of template on the crystallisation of Fe-ZSM-5 were investigated. The morphology and structure of ZSM-5 were characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), X-ray electron spectroscopy (XPS) and scanning electron microscopy (SEM). The catalysis of 3,3′,5,5′-tetramethylbenzidine (TMB) by Fe-ZSM-5 was then carried out to evaluate its enzyme-like catalytic performance as a type of nanozyme catalyst. The results showed that Fe-ZSM-5 exhibited peroxidase-like activity, oxidizing TMB into a colored substance in the presence of hydrogen peroxide (H₂O₂). Kinetic analysis implied that, compared with natural horseradish peroxidase (HRP), Fe-ZSM-5 peroxidase mimics exhibit inferior affinity and enzymatic catalytic velocity towards the TMB substrate. However, it exhibited excellent stability under extreme pH, temperature, and ionic strength conditions. This work provides a possible reference for the construction of functional nanozymes using natural mineral resources.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"262 ","pages":"Article 107619"},"PeriodicalIF":5.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of different China and ball clays on traditional ceramic process: A multi-methodological approach","authors":"Andrea Bernasconi ,&nbsp;Nicoletta Marinoni ,&nbsp;Lucia Mancini ,&nbsp;Marco Voltolini ,&nbsp;Fernando Francescon ,&nbsp;Rinaldo Sartori ,&nbsp;Alessandro Pavese","doi":"10.1016/j.clay.2024.107587","DOIUrl":"10.1016/j.clay.2024.107587","url":null,"abstract":"<div><div>A combination of technological properties, mineralogical composition and three-dimension (3D) imaging is proposed to get insights into sanitary-ware ceramic bodies of the Vitreous-China technology as a function of the different clay raw materials used in the formulation of slip. Particular attention is paid to the effects induced along the production chain, during casting, after drying (dried body) and after firing (fired body).</div><div>The different combinations of China and ball clays lead to different casting behaviour, in first instance, and to different mechanical strength, then, due to variations in the particle size distribution rather than in the mineralogical composition. In particular, the finer the particle size, the finer the pore size and, in addition, the better the mechanical properties (with a maximum of 4.7 MPa), due to a better packing. However, fine particle size distribution worsens the slip's behaviour into moulds, impacting negatively on productivity, with a 17 % reduction of casting thickness.</div><div>Upon firing process, such differences are mitigated by the body densification and result in more similar pores' distributions, though the importance of the mineralogical composition is revealed. In fact, differences in mineralogical phases' contents and in kaolinite HI index guide the comprehension of high temperature phase evolution and technological properties like the fired body thermal expansion, foremost via residual quartz.</div><div>These results are important for a plastic raw materials's selection within the ceramic sanitary-ware process.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"262 ","pages":"Article 107587"},"PeriodicalIF":5.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Eco-friendly composite materials of polybutylene succinate with clay minerals, lignin and canabrava fiber","authors":"Lucas Nao Horiuchi ,&nbsp;Raquel de Melo Barbosa ,&nbsp;Joyce Batista Azevedo ,&nbsp;Fátima Garcia-Villen ,&nbsp;César Viseras ,&nbsp;Rosana Lopes Lima Fialho","doi":"10.1016/j.clay.2024.107606","DOIUrl":"10.1016/j.clay.2024.107606","url":null,"abstract":"<div><div>The widespread use of plastics in seedling production, due to their convenience and cost-effectiveness, poses significant environmental challenges, including pollution and high resource consumption. To address these issues, a sustainable hybrid bio-composite was developed using bio-polybutylene succinate (PBS) combined with canabrava fibers (Cana) (up to 30 wt%), lignin (Lig), montmorillonite (MMT), and sepiolite (SEP). This bio-composite, featuring a negative carbon footprint and fully biodegradable components, offers a promising alternative to polypropylene packaging in seedling production, enhancing environmental sustainability and promoting the valorization of waste materials like Cana and Lig. The bio-composites were synthesized via melt blending in an extruder, and their mechanical, thermal, and morphological properties were evaluated. The melt flow rate could be effectively managed by adjusting the combination of Cana, Lig, and clays, achieving values comparable to polypropylene (EP440L). Notable enhancements in mechanical properties were observed relative to neat PBS, with increases in Young's modulus (up to 353 %), yield stress (up to 198 %), flexural modulus (up to 390 %), and flexural strength (up to 160 %). These improvements are mainly attributed to the high Cana fiber content and the hybrid effects of clays, particularly SEP. However, reductions in impact resistance and elongation were noted compared to neat PBS and EP440L, likely due to limited fiber-polymer interactions and increased compactness as observed in SEM analysis. FT-IR analysis indicated strong interactions between clays and PBS, evidenced by a shoulder at 1602–1608 cm⁻¹. XRD analysis suggested the exfoliation of MMT, as indicated by the absence of the (001) plane reflection, although the high content of Cana may have mitigated some mechanical benefits. DSC analysis revealed increased crystallinity with the incorporation of Cana, Lig, and clays, likely driven by nucleation effects. The presence of SEP was associated with a secondary melting peak, indicating effective dispersion and interfacial crystal formation. Enhanced thermal stability was demonstrated by a higher temperature at 90 % mass loss compared to neat PBS. These findings suggest the bio-composite is a sustainable alternative for reducing plastic waste in seedling production.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"262 ","pages":"Article 107606"},"PeriodicalIF":5.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nano-enhanced thermo-mechanical properties of ethylene vinyl acetate with intumescent agent and organoclays","authors":"Ji-Hee Lee ,&nbsp;Hyeon-Ju Ryu ,&nbsp;N. Sanoj Rejinold ,&nbsp;J. Yoon Choi ,&nbsp;Yun-Ze Long ,&nbsp;Goeun Choi ,&nbsp;Jin-Ho Choy","doi":"10.1016/j.clay.2024.107608","DOIUrl":"10.1016/j.clay.2024.107608","url":null,"abstract":"<div><div>Ethylene vinyl acetate copolymer (EVA) micro-composites having both anionic and cationic clays were made using a solution-blending technology. Anionic clay (layered double hydroxide; LDH) and Cationic clay (Fluoro-mica; ME) were functionalized with hydrophobic molecules such as stearate (SA) and cetyltrimethylammonium (CTA) for improving the compatibility with hydrophobic EVA. The SA intercalated MgAl-LDH (SA-LDH) and CTA intercalated ME (CTA-ME) were prepared by co-precipitation and ion-exchange methods, then blended into EVA matrix together along with intumescent flame retardant (IFR) by solution blending forming final EVA micro-composite. The impact of organoclays on the flame retardancy of EVA micro-composites were tested by a cone calorimeter test and vertical flammability with UL-94 test method. As per XRD for EVA micro-composites, the (00<em>l</em>) peaks of organoclays vanished, indicating their exfoliation in EVA matrix. The thermo-mechanical characteristics for EVA micro-composites improved further than EVA containing IFR only. EVA composite containing 30 wt% IFR, 1 wt% LDH and 4 wt% ME (L1M4-I30-EVA) passed the UL-94 test with V-0 rating, lowering the peak heat release rate from 2107.7 kW/m² of intact EVA to 213.1 kW/m². The observed char morphology revealed that organoclays were effective in forming rigid tight char layers. The synergy between organoclays and the IFR in the current EVA micro-composite is crucial for improving char formation and enhancing flame-retardant performance.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"262 ","pages":"Article 107608"},"PeriodicalIF":5.3,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of volcanic ash and chamotte as substitute temper in the production of ceramic tiles","authors":"Cristina Maria Belfiore,&nbsp;Serena Parisi,&nbsp;Salvatore Menta,&nbsp;Paolo Mazzoleni","doi":"10.1016/j.clay.2024.107603","DOIUrl":"10.1016/j.clay.2024.107603","url":null,"abstract":"<div><div>This paper explores the use of waste materials as substitutes in ceramic paste formulations. Building on previous research which has laid the groundwork for the use of volcanic ash as temper in ceramic tile manufacture, investigation is here extended to a broader spectrum of waste-based ceramic pastes. Specifically, five different mixtures have been manufactured through the hand-made technique by using Etna volcanic ash and/or tile processing residues (chamotte), mixed with clay in variable proportions. Physical-mechanical tests including flexural strength, water absorption, resistance to thermal shock, deep abrasion and impact, have been performed and results compared with those of reference tiles. Notably, ceramic pastes combining clay with chamotte or clay with chamotte and fine volcanic ash, show better performance. This is certainly due to the good physical-mechanical properties of chamotte which binds well with the clayey groundmass so reducing shrinkage / cracking and improving the overall quality of ceramic products. Conversely, volcanic ash does not show a high degree of union with the clayey matrix, particularly when occurring in larger grain size. However, when present in fine clasts and in combination with chamotte, the resulting products display good physical-mechanical characteristics.</div><div>This study highlights once again the potential of waste materials in ceramic manufacturing, paving the way for a more sustainable and resource-efficient industry.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"262 ","pages":"Article 107603"},"PeriodicalIF":5.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Impact of morphology of hydrophilic and hydrophobic bentonites on improving the pour point in the recycling of waste cooking oils","authors":"Alberto Mannu ,&nbsp;Matteo Poddighe ,&nbsp;Marzia Mureddu ,&nbsp;Simona Castia ,&nbsp;Gabriele Mulas ,&nbsp;Fabrizio Murgia ,&nbsp;Maria Enrica Di Pietro ,&nbsp;Andrea Mele ,&nbsp;Sebastiano Garroni","doi":"10.1016/j.clay.2024.107607","DOIUrl":"10.1016/j.clay.2024.107607","url":null,"abstract":"<div><div>Waste Cooking Oils (WCOs) are generated worldwide through industrial food processing and household use, posing environmental concerns upon disposal. Bentonites often showed to be effective in removing minor contaminants in vegetable oil refining. The present research focused on the processing of raw WCOs using four bentonites, two commercials and two obtained by ball milling of the latest. The different bentonites (hydrophobic and hydrophilic) were characterized before and after ball milling (BM) procedure, including an exhaustive analyses of crystal structure, morphology and surface area via x-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and N₂-physisorption technique. Optimization of BM processing in terms of milling time was achieved within 60 min. The milled powders were then tested as adsorbents for recycling WCOs with different degrees of decomposition (expressed in terms of free fatty acids, FFAs, content). Employing a design of experiments approach, the impact of five parameters (FFAs content, temperature, specific surface area, stirring, BM time) on the resulting pour point (PP), taken as a quality benchmark for recycled oil, was assessed. Quantitative multivariate statistical analysis revealed temperature's negligible role and identified the significant impact of two characteristics of the bentonite (specific superficial area and ball milling time), as well as the relevant role of the stirring during the treatment. At the end, hydrophilic bentonite resulted able to improve the PP of waste oils with a low content of free fatty acids of about 10 °C.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"262 ","pages":"Article 107607"},"PeriodicalIF":5.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"An enhanced electrokinetic system for remediation of Cu-polluted clay soils by integrating purging solutions and intermittent power","authors":"F. Diba ,&nbsp;A.R. Goodarzi ,&nbsp;S. Sobhanardakani ,&nbsp;M. Cheraghi ,&nbsp;B. Lorestani","doi":"10.1016/j.clay.2024.107605","DOIUrl":"10.1016/j.clay.2024.107605","url":null,"abstract":"<div><div>This study investigated the effectiveness and underlying mechanisms of purging solutions enhanced by intermittent power in improving electrokinetic (EK) restoration of clay soils even under high levels of heavy metals (HM). In so doing, the artificially contaminated specimens containing a wide range of copper (Cu) were prepared and then subjected to a series of EK tests with various electrolytes and electric regimes. Macro and micro scale examinations revealed that under the unenhanced EK condition (i.e., continuous current without agents), the formation of non-conducting solid phases and/or the clogged fabric in the samples with the high dosages (&gt; 250 mg/kg) of HM could dramatically impede the metal separation from the soil. Hence, increasing the remediation time would not be very effective in facilitating the decontamination process. It was observed that the EDTA-ameliorated treatment accompanied by pentetic acid and acetic acid can mitigate the metal precipitation/encapsulation effects induced by EK actions, resulting in improved rate of HM removal. In this case; however, a high portion of these enhancers would be required to ensure the stable mobility of ions and to achieve successful recovery. Such a limitation has been shown to be overcome by incorporating pulsed power (PP) at an optimal frequency. In fact, as evidenced by SEM-EDX and XRD analyses, the integration of chemical agents with PP could simultaneously retain the solubilized Cu species in the soil mass and modify the matrix tortuosity (i.e., the establishment of well-linked pores), two features that have been found to play essential roles in providing for favorable activity of HM ions during the EK operation. The corresponding refinements in the binary system would cause an almost 8 folds increase in the removal efficiency and a shorter (up to 30 %) time of treatment compared to conventional EK.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"262 ","pages":"Article 107605"},"PeriodicalIF":5.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solution-blow spinning halloysite nanotube loaded chitosan-polyethylene oxide fibrous membrane as hemostatic dressings","authors":"Jinmiao Chen ,&nbsp;Yuxi Mo ,&nbsp;Xiangyan Zhang ,&nbsp;Shaohua Zhang ,&nbsp;Aihua Cui ,&nbsp;Xueqin Wang ,&nbsp;Jiwei Li","doi":"10.1016/j.clay.2024.107597","DOIUrl":"10.1016/j.clay.2024.107597","url":null,"abstract":"<div><div>In this study, chitosan/polyethylene oxide fibrous membranes (CS/PEO) with varying halloysite nanotubes (HNTs) contents were prepared by solution-blow spinning. The HNTs-CS/PEO membranes with a 12 wt% HNTs content exhibited excellent hydrophilicity, air permeability, and flexibility. The in vitro hemostasis time of the 12 % HNTs-CS/PEO was 217 s, and it was observed to form a stable thrombus. Moreover, the antibacterial efficacy of 12 % HNTs-CS/PEO against <em>Escherichia coli</em> and <em>Staphylococcus aureus</em> was 90.05 % and 69.86 %, respectively. Furthermore, the in vitro cytotoxicity study demonstrated the nontoxic nature of the 12 % HNTs-CS/PEO. The solution-blow spinning HNTs-CS/PEO fibrous membrane can potentially prevent the risk of distal thrombosis caused by separating individual HNTs and offer the advantages of a simple preparation and application process. This study presents a novel first-aid hemostatic dressing and offers a novel approach to loading inorganic nanoparticles onto fibers.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"262 ","pages":"Article 107597"},"PeriodicalIF":5.3,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Organoclays from acid-base activated vermiculites for oil-water mixture separations","authors":"Faezeh Hajizadeh ,&nbsp;Reza Norouzbeigi ,&nbsp;Elmira Velayi","doi":"10.1016/j.clay.2024.107600","DOIUrl":"10.1016/j.clay.2024.107600","url":null,"abstract":"<div><div>Oily wastewater discharge causes severe environmental pollution and resource waste, requiring the development of low-cost adsorbents with good hydrophobicity. This study presents the preparation and use of a novel highly hydrophobic adsorbent based on natural vermiculite clay minerals to separate free/emulsified oil-water mixtures. Vermiculite was first activated with sulfuric acid and potassium hydroxide to increase its adsorption capacity and surface area. The sample was then modified with cetyltrimethylammonium bromide (CTAB) to change the wetting properties from hydrophilic to hydrophobic and increase oil adsorption. XRD, XRF, FESEM, BET, FTIR, and zeta potential analyses were carried out to determine changes in texture, morphology, and chemical composition of vermiculite affected by acid, base and acid-base activation. According to the results, the acid-base activation process was selected for vermiculite treatment before CTAB modification, which demonstrated a high oil adsorption selectivity (1910.6 %) compared to raw vermiculite (44.14 %). Effect of CTAB concentration on vermiculite's wetting properties was studied. The results confirmed that the acid-base activated sample modified at 0.9 mmol.L⁻¹ near the critical micelle concentration of CTAB exhibited highly hydrophobic properties (water contact angle of 148° ± 1°). For oil-in-water emulsions, the treated adsorbent demonstrated a high oil removal efficiency of 96 ± 2 %. Additionally, a packed layer of highly hydrophobic vermiculite was applied for free heavy/light oil-water mixture and water-in-oil emulsion separation. The performance test for separation of free oil-water mixture and water-in-oil emulsion showed high separation efficiency (all above 90 %). The reusability of highly hydrophobic vermiculite as well as the effect of oil type, the thickness of the adsorbent layer, and the height of the water phase on separation performance were also investigated.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"262 ","pages":"Article 107600"},"PeriodicalIF":5.3,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}