Adsorption最新文献

{"title":"Pomegranate peel-derived activated carbon: An effective adsorbent for protocatechuic acid removal and environmental remediation","authors":"Shivali Singh Gaharwar,&nbsp;Adrija Majumdar,&nbsp;Anupama Kumar","doi":"10.1007/s10450-024-00550-y","DOIUrl":"10.1007/s10450-024-00550-y","url":null,"abstract":"<div><p>This study investigated the potential of utilizing pomegranate peel (PP) waste for producing activated carbon (PPBAC) aimed at removing phenolic contaminants, specifically protocatechuic acid (PCA), from wastewater, and recovery from potato peel extract. The PPBAC was prepared through chemical activation with phosphoric acid (H₃PO₄) followed by thermal treatment at 350℃. Comprehensive characterization of the PPBAC was performed using FTIR, Raman spectroscopy, XRD, BET surface area analysis, FESEM analysis. Key operational factors, including dosage, concentration, contact time, and pH, were systematically optimized to improve adsorption efficiency, achieving a value of 18.89 mg/g within 30 min. The adsorption process was well described by the Freundlich isotherm model and followed pseudo-second-order kinetics. Additionally, DFT computations highlighted the reactivity of PCA in its neutral and protonated forms, which correlated with the observed effective adsorption performance. This research underscores the feasibility of converting agricultural waste into a valuable adsorbent for waste water treatment.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 8","pages":"2219 - 2233"},"PeriodicalIF":3.0,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrogen peroxide—a promising oxidizer for rocket engines: physical and chemical properties: decomposition in the liquid phase","authors":"A. A. Levikhin,&nbsp;A. A. Boryaev","doi":"10.1007/s10450-024-00547-7","DOIUrl":"10.1007/s10450-024-00547-7","url":null,"abstract":"<div><p>This paper presents a comprehensive review of the physical and chemical properties of hydrogen peroxide as well as some regularities of its decomposition in the liquid phase. Hydrogen peroxide has been known for many decades and currently is one of the most important products of the chemical industry. Until recently, its use in the liquid state in rocket engines in space and defense has been limited due to storage and safety concerns. The latest research results made it possible to obtain hydrogen peroxide with higher purity and concentration as well as improved properties, safe and convenient in storage. As a result, hydrogen peroxide is widely considered for use in a wide range of rocket propulsion systems both as a bipropellant oxidizer and a monopropellant. As the size of the satellites being designed decreases, it is more and more difficult to select appropriate propulsion systems (PSs) ensuring required controllability and maneuverability. Currently, the smallest satellites (5–50 kg) usually use compressed gas. It is proposed to use hydrogen peroxide to improve efficiency, while reducing the cost compared to hydrazine PSs. As a monopropellant, hydrogen peroxide is characterized by high density (&gt; 1,300 kg/m³) and specific impulse in vacuum of approx. 150 s (approx. 1,500 m/s). Its use in combination with hydrocarbons, pentaborane, and beryllium hydride is quite promising. The hydrogen peroxide/kerosene combination has particular advantages that make it convenient to use in rockets, especially when thrust control in a wide range is required. Its exceptional advantages are as follows: among various liquid fuel combinations, the hydrogen peroxide/kerosene combination is characterized by one of the highest fuel densities (approx. 1,270 kg/m³); besides, hydrogen peroxide tanks can be made of aluminum alloys, which significantly reduces their weight. Hydrogen peroxide is quite easy to handle since, unlike other oxidizers, it does not emit toxic vapors when stored and does not release toxic substances after combustion. The maximum permissible concentration of hydrogen peroxide vapors in the air of the working area is 0.3 mg/m³. Hazard class—2 according to GOST 12.1.007. From an environmental perspective, this fuel combination is comparable to the liquid oxygen/liquid hydrogen fuel. The need to install control engines for small satellites (e.g. Cubesat) is currently becoming a pressing issue. The use of neutral gases as a working fluid for control systems in such cases cannot compete with the use of, for example, hydrogen peroxide. At the same time, the creation of electric engines for small satellites is limited by the low available electrical power.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 8","pages":"2187 - 2217"},"PeriodicalIF":3.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rice husk-based magnetic biochar produced via hydrothermal route for petroleum spills adsorption: characterization, adsorption kinetics, and isotherms","authors":"Dessy Ariyanti,&nbsp;Aprilina Purbasari,&nbsp;Denny Nugroho Sugianto,&nbsp;Dina Lesdantina,&nbsp;Marissa Widiyanti","doi":"10.1007/s10450-024-00544-w","DOIUrl":"10.1007/s10450-024-00544-w","url":null,"abstract":"<div><p>Marine pollution, particularly oil spills, can occur as a result of tanker operations (air ballast), ship daily operational in the terminals, ship scrapping, and most frequently caused by accidents and collisions. The aftereffects range from fish migration and death to altered behaviour and reproduction in marine species, plankton pollution, fish migration, ecosystem harm, and economic loss. These give long term hazardous effect for ecosystem balance. Bio-based adsorbents such as biochar can be an alternative that environmentally friendly to replace chemical sorbents that till date effective to adsorb oil spills. However, its small particle size complicates at the time of separation. Adding magnetic properties to biochar is important to make it easy to separate and reuse so that its sustainability can be achieved. This study investigated the synthesization and performance of magnetic biochar to remove oil spills. Using the hydrothermal process at 200°C, it also involves the synthesis of magnetic biochar from agricultural waste, specifically rice husks. Because it can be done at low temperatures—between 180° and 250°C—hydrothermal carbonization is thought to be a cost-effective technique of producing biochar. The presence of FeO on the samples, as shown by FTIR, further supports the SEM-EDX study results showing the presence of Fe elements in magnetic biochar. Magnetic rice husk biochar has an area functional group of 20.79 and a surface area of 27.65 m²/g. It supports in adsorbing petroleum spill with an adsorption capacity of 0.593 g.g-1 and the effectiveness achieved at 63.1%. The reaction kinetics follows pseudo-second-order non-linear with R² of 0.99. Magnetic rice husk biochar has a saturated magnetization of 0.46 emu/gr.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 8","pages":"2175 - 2186"},"PeriodicalIF":3.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermo-chemical strategies to prepare biowaste derived activated carbon as metal adsorbent","authors":"Adnan Irshad,&nbsp;Basharat Ali,&nbsp;Muhammad Imran,&nbsp;Muhammad Atif,&nbsp;Iftikhar Ahmed,&nbsp;Musinguzi Alex","doi":"10.1007/s10450-024-00499-y","DOIUrl":"10.1007/s10450-024-00499-y","url":null,"abstract":"<div><p>Increasing apprehension about water pollution has stimulated the pursuit of sustainable remedies, resulting in an upsurge in scholastic investigations that focus on biobased material for wastewater treatment. Since ages adsorption through activated carbon (AC) has been considered a reliable method. This study has examined different surface chemistry techniques utilized in biobased ACs for pollutant absorption from wastewater. Successful creation of eco-friendly adsorbents, from natural biomaterials like plant-derived fibers, biopolymers, and biofunctionalized surfaces, has efficiently eliminated metallic contaminants from wastewater. ACs derived from plant wastes are a favorable choice due to cost-effectiveness, biodegradability, minimal sludge generation, high regression percentage, and efficient metal adsorption capabilities. In addition, this study highlights their ability to be scaled up, their affordability, and their positive impact on the environment. The field of surface chemistry of biobased materials is constantly evolving through interdisciplinary collaborations between chemists, materials scientists, and environmental engineers. This progress offers promising avenues for addressing the urgent challenges of water pollution and contributing to the development of a cleaner and healthier environment. This review compiles the latest literature on AC production from various biowaste sources, utilizing different methods such as physical, chemical, or thermochemical activation, ultrasonication, and oxidation. The focus is on its application in waste water treatment, specifically in metal adsorption.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 8","pages":"2135 - 2174"},"PeriodicalIF":3.0,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Composite waste-corn-stalk-derived carbon aerogel and sea-urchins γ-MnO2 structure for high-performance pseudo-capacitance deionization","authors":"Minh Dai To,&nbsp;Hoang Anh Nguyen,&nbsp;Tuan Anh Dao,&nbsp;Thai Hoang Nguyen,&nbsp;Viet Hai Le,&nbsp;Thi Dieu My Phan,&nbsp;Minh Thuan Pham,&nbsp;Tan Le Hoang Doan,&nbsp;Thi Thu Trang Nguyen,&nbsp;Le Thanh Nguyen Huynh","doi":"10.1007/s10450-024-00545-9","DOIUrl":"10.1007/s10450-024-00545-9","url":null,"abstract":"<div><p>This study reported the synthesis, characterization, and electrochemical performance of sea-urchins γ-MnO₂ structure and its composites with carbon aerogel (CA) derived from Waste-corn-stalk for capacitive deionization (CDI) application. Scanning electron microscopy revealed distinct sea-urchin morphologies where γ-MnO₂ exhibited a fibrous, porous structure, and its integration with CA resulted in composites with varied porosity and particle size distributions; X-ray diffraction analysis confirmed the crystalline nature of γ-MnO₂. It indicated a successful composite formation with CA, which was observed to enhance the electrochemical performance via the synergistic charge storage effect. Cyclic voltammetry and charge-discharge tests showed that the composites, particularly CA/γ-MnO₂-30, had superior electrochemical performance compared to γ-MnO₂ pristine, with improved capacitance and rate capabilities. CDI performance assessments demonstrated that the composite CA/γ-MnO₂-30 significantly outperformed in salt adsorption capacity of 32.7 mg/g, highlighting the potential of these materials for efficient water desalination. The electrosorption kinetic process of CA/γ-MnO₂ composites is suitable for the pseudo-second-order (PSO) model by combining the double-layer adsorption and the pseudo-capacitance process.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 8","pages":"2069 - 2082"},"PeriodicalIF":3.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrochar-derived activated carbons from poplar and spruce sawdust: synthesis, characteristics and carbon adsorption performance","authors":"Sibel Başakçılardan Kabakcı,&nbsp;Başak Karakurt Çevik,&nbsp;Merve Nazlı Borand,&nbsp;Kübra Al","doi":"10.1007/s10450-024-00542-y","DOIUrl":"10.1007/s10450-024-00542-y","url":null,"abstract":"<div><p>The escalating demand for energy across various sectors has led to a significant increase in greenhouse gas emissions, primarily due to the extensive use of fossil fuels. This study addresses the critical need for effective carbon capture adsorbents to mitigate environmental impacts. Bio-based activated carbons, known for their high surface area and pore volume, were synthesized from poplar and spruce sawdust through hydrothermal carbonization (HTC) followed by simultaneous carbonization and activation. HTC, aimed at enriching precursors with oxygen-rich surface functional groups, was conducted at temperatures of 180, 200, and 220 °C for 90 min. This process produced hydrochars that were subsequently activated at 800 °C in the presence of KOH under a nitrogen atmosphere. Remarkably, the activated carbons derived from poplar sawdust hydrochar (at a HTC temperature of 200 °C) and spruce sawdust hydrochar (at a HTC temperature of 220 °C) demonstrate superior specific surface areas of 1680.59 and 1231.57 m²/g, along with total pore volumes of 0.87 and 0.62 cm³/g, respectively. Moreover, both poplar and spruce hydrochar-based activated carbons exhibit high CO₂ adsorption capacities of 3.75 and 3.43 mmol/g, respectively, at 24.85 °C and 1 atm. Their CH₄ adsorption capacities are 1.52 and 1.42 mmol/g, respectively, under the same conditions. This work highlights the potential of bio-based activated hydrochars in applications such as indoor air quality improvement and industrial flue gas treatment, emphasizing the importance of pretreatment and activation conditions in optimizing adsorbent performance.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 8","pages":"2083 - 2098"},"PeriodicalIF":3.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Brazilian clays as natural cation exchangers for copper sorption in a batch system","authors":"Rafaela Reis Ferreira,&nbsp;Talles Barcelos da Costa,&nbsp;Rennan Felix da Silva Barbosa,&nbsp;Paulo Henrique Camani,&nbsp;Romualdo Rodrigues Menezes,&nbsp;Derval dos Santos Rosa","doi":"10.1007/s10450-024-00543-x","DOIUrl":"10.1007/s10450-024-00543-x","url":null,"abstract":"<div><p>This study evaluated Brazilian natural clays for copper sorption from water. Clays were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), and sorption tests. Affinity tests showed that brasgel (B, 69%), chocobofe (Cb, 46%), and chocolate (Ch, 41%) had higher Cu²⁺ capture potential than zeolite (Z, 26%), palygorskite (P, 18%), treated palygorskite (TP, 11%), and cloisite 20A (C20A, 4%). The capture of Cu²⁺ by clays and zeolite occurs with the release of light metal ions, especially Na⁺, Mg²⁺ and Ca²⁺, which were initially present in the nanomaterials structure. The organomodification of clays possibly altered specific surface area, affecting Cu²⁺ removal. Besides, the lamellae morphology of B, Cb, and Ch and their crystalline structure of smectites facilitated the metal ion removal. Next, B, Cb, and Ch clays were selected based on their affinity with Cu²⁺ to investigate these systems’ sorption kinetics and equilibrium isothermal. The sorption kinetics showed that the equilibration time was reached within 120 min for all clays. The Pseudo-second order (PSOR) and External mass transfer resistance (EMTR) models effectively represented the kinetics data. The isothermal equilibrium revealed that the maximum uptake capacity for clays by Cu²⁺ increased in the following order: B (0.264 mmol g⁻¹) &gt; Cb (0.223 mmol g⁻¹) &gt; Ch (0.177 mmol g⁻¹). The isothermal curves better fit the Freundlich (B nanoclay) and Langmuir (Cb and Ch clays) models. The findings suggest that Brazilian clay nanostructures, particularly B, Cb, and Ch, are promising nanoadsorbents for removing bivalent copper ions from aqueous solutions.</p>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 8","pages":"2113 - 2133"},"PeriodicalIF":3.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An investigation into equilibrium, Kinetics, and thermodynamics of yellow bemacid dye removal from Aqueous Solutions using pomegranate skin (PG) and Date Pedicels (DPd) as Green Adsorbents","authors":"Ghania Henini,&nbsp;Hifsa Khurshid,&nbsp;Ykhlef Laidani,&nbsp;Salah Henini,&nbsp;Saviour A. Umoren,&nbsp;Rami K. Suleiman,&nbsp;Mohammed Hadj Meliani","doi":"10.1007/s10450-024-00546-8","DOIUrl":"10.1007/s10450-024-00546-8","url":null,"abstract":"<div><p>There has been substantial research focused on developing environmentally friendly materials to remove pollutants from wastewater. In this regard, a key study area is focused on green materials derived from plants and agricultural wastes. These materials have shown promising results in removing pollutants from water, providing a sustainable solution for wastewater treatment. Additionally, using plant-based materials has helped reduce reliance on traditional chemical-based methods, contributing to a more environmentally friendly approach. The current study investigated the efficacy of utilizing pomegranate skin (PG) and date pedicels (DPd) as potential green adsorbents for the elimination of synthetic dye Yellow Bemacid (YB) from aqueous solutions. The investigation involved adsorption tests conducted under various experimental conditions, such as contact time, solution pH, initial dye concentration, and temperature. The obtained findings manifested that both PG and PdD exhibited considerable adsorption capacities for YB, quantified at 20.75 mg/g and 12 mg/g, respectively. The Langmuir model exceptionally fit the experimental data, and the adsorption kinetics closely followed the pseudo-second-order model for both materials studied. The thermodynamic parameters unveiled that the adsorption of YB was a feasible, spontaneous, and endothermic process, with enthalpy (ΔH) values of 2.330 and 4.165 kJ/mol for PG and PdD, respectively. Furthermore, the favourable affinity between the materials PG, PdD, and the YB molecules was indicated by the positive values (0.010 and 0.014 kJ/mol.K ) of entropy (∆S⁰). Lastly, the negative values of the free enthalpies (∆G⁰ &lt; 0) for the studied systems signified the spontaneity of the adsorption process.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 8","pages":"2099 - 2112"},"PeriodicalIF":3.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly sorbents for petroleum and diesel based on macadamia nutshell waste in castor oil-based polyurethane foam for oil spill","authors":"Lana S. Maia,&nbsp;Thalita da Silva Neto,&nbsp;Júlia Dornelas Perluxo,&nbsp;Flávia Lima do Carmo,&nbsp;Derval S. Rosa,&nbsp;Daniella R. Mulinari","doi":"10.1007/s10450-024-00541-z","DOIUrl":"10.1007/s10450-024-00541-z","url":null,"abstract":"<div><p>Aquatic environments have faced significant and severe impacts in recent years due to oil spills and chemical leaks in oceanic and river ecosystems. Because of this, several studies have aimed to develop sustainable adsorbents with hydrophobic characteristics. This research focuses on creating eco-friendly sorbents using macadamia nutshell waste (MW) incorporated into castor oil-based polyurethane foam at different proportions (5, 10, 15, and 20 wt%). The study also evaluates the absorption efficiency of these sorbents for different oil types, including crude oils (crude oil CB, crude oil SB, diesel S10, and diesel S500). The eco-friendly sorbents (biocomposites) were characterized by optical microscopy, scanning electron microscopy, density, and contact angle analyses. Results revealed that the pore morphology of sorbents changed to a partial closed-cell structure with a smaller pore size. Additionally, the biocomposites exhibited a higher contact angle (119.1º ± 0.4) compared to pure polyurethane (PU). The oil absorption efficiency by biocomposites showed maximum sorption of 7.3, 7.1, 5.1, and 3.9 g.g⁻¹ for crude oils (SB and CB), S10, and S500 diesel, respectively. The absorption results showed that the biocomposites showed good removal of heavy oils (crude oil) compared to light oils (diesel S10 and S500). Among the isotherm models used, the Langmuir model demonstrated the most accurate fit and estimated a maximum adsorption capacity of 5.39, 4.23, 3.24, and 2.69 g.g⁻¹ for crude oil CB, crude oil SB, S10, and S500 diesel respectively, using PU + 20% MW. Additionally, PU + 20% MW showed excellent reusability during 30, 30, 30, and 10 cycles of sorption–desorption for crude oil CB, crude oil SB, S10, and S500 diesel, respectively.</p>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 8","pages":"2037 - 2051"},"PeriodicalIF":3.0,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flash combustion prepared Sm and Co doped Sr hexaferrite for environmental applications","authors":"Mai M. El-Masry,&nbsp;Rania Ramadan","doi":"10.1007/s10450-024-00532-0","DOIUrl":"10.1007/s10450-024-00532-0","url":null,"abstract":"<div><p>Nanotechnology is offering solutions to water contamination issues, as new techniques are needed to improve the removal of harmful compounds from water bodies. Despite previous reviews on this topic, nanotechnology is paving the way for more effective water treatment methods. Understanding the substitute influence of divalent Co²⁺ and rare earth elements Sm³⁺ on the structure, magnetic, and removal efficiency of hexagonal ferrites requires an understanding of a sequence of SrFe₁₂O₁₉, SrFe_11.5Co_0.5O₁₉, Sr_0.95Sm_0.05Fe₁₂O₁₉, and Sr_0.95Sm_0.05Fe_11.5Co_0.5O₁₉ M-type hexagonal ferrites were prepared using the flash technique. The XRD examination revealed that the crystallized material formed a single M-type hexagonal phase. The characteristics of M-type hexagonal ferrites include absorption bands with low wavenumbers in the FTIR curves between 400 to 1000 cm⁻¹. There was a variation in magnetic characteristics with the replacement of Sm³⁺ and Co²⁺ doping, possibly due to the spin canting impact created by rare earth Sm³⁺ and Co²⁺ ions. The goal of the research is to explore the potential of doping magnetic hexaferrites and its influence in wastewater treatment. Various parameters, such as pH and contact duration, that influence the adsorption of lead ions from aqueous solutions were also examined. At pH 7 and 25 °C after 70min, the maximal removal efficiency of the Sr_0.95Sm_0.05Fe_11.5Co_0.5O₁₉ was found to be 99%. Magnetic separation was carried out by applying an external magnetic field using a permanent magnet. The strong magnetization of the ferrites (51–58 emu/g) enabled the rapid separation of the magnetic particles from the solution, with over 95% of the ferrite particles being recovered within 10 to 70 min. The Freundlich isotherm model fitted all the isotherm data. Adsorption kinetics were explained by the pseudo-first-order, pseudo-second order, and intraparticle diffusion models. The investigated samples’ adsorption capacity remained efficient till 5 cycles.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 8","pages":"2017 - 2035"},"PeriodicalIF":3.0,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10450-024-00532-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}