Korean Journal of Chemical Engineering最新文献_第4页

Jackfruit (Artocarpus heterophyllus) Seeds as Effective Heterogeneous Catalyst For Biodiesel Synthesis from Soybean Oil 菠萝蜜种子作为大豆油合成生物柴油的多相催化剂

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-22 DOI: 10.1007/s11814-025-00383-7

Dulu Brahma, Riu Riu Wary, Biswajit Nath, Maqsuma Banoo, Sanjay Basumatary, Ujjal K. Gautam, Manasi Buzar Baruah, Pranjal Kalita

{"title":"Jackfruit (Artocarpus heterophyllus) Seeds as Effective Heterogeneous Catalyst For Biodiesel Synthesis from Soybean Oil","authors":"Dulu Brahma, Riu Riu Wary, Biswajit Nath, Maqsuma Banoo, Sanjay Basumatary, Ujjal K. Gautam, Manasi Buzar Baruah, Pranjal Kalita","doi":"10.1007/s11814-025-00383-7","DOIUrl":"10.1007/s11814-025-00383-7","url":null,"abstract":"<div>Here, we demonstrate the utilization of calcined jackfruit seeds as highly efficient heterogeneous base catalysts (JSC-400 and JSC-600) for biodiesel synthesis from soybean oil. Catalysts were characterized by PXRD, FTIR, ({text{N}}_{2})-adsorption, SEM–EDX, FETEM, XPS, Hammett and CO2-TPD techniques. PXRD and FETEM analysis confirmed the presence of mixed metals in their oxide and carbonate forms, and their polycrystalline structures, respectively. FESEM and ({text{N}}_{2})-adsorption revealed the spongy, flake-like morphology and mesoporous structure of the catalysts. The concentration of potassium (K) in JSC-400, which is responsible for its basicity, was evaluated using EDX (12.40 atomic%) and XPS (13.87 atomic%). JSC-400 showed a more promising biodiesel yield (97.7%) in 30 min, which might be due to the higher basicities of JSC-400 with 11.51, 0.42 mmol/g and 1.997 mmol/g than JSC-600 (11.51, 0.42 mmol/g and 1.997 mmol/g) as measured by pH, Hammett and TPD-CO2 techniques, respectively. Three times consecutive recycle study of JSC-400, showed no significant loss in yield (95.2%), compared to fresh catalyst (97.7%). Thermodynamic and kinetic studies confirmed the non-spontaneous and pseudo-first order reaction, respectively. Product was confirmed by FTIR, 1H and 13C NMR and GC–MS techniques, and fuel properties were found to be comparable with the literatures and international standards.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"577 - 594"},"PeriodicalIF":2.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480927","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}

引用次数: 0

Spent Lithium-Ion Battery Recycling: Multi-stage Synergistic Deep Removal of Impurities and Lithium Extraction 废锂离子电池回收：多阶段协同深度去除杂质和锂提取

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-21 DOI: 10.1007/s11814-025-00382-8

Wen-bo Lou, Dong-yan Liu, Yun Wang, Da Zhao, Zi-cheng Sun, Yi Zou, Sheng-yan Wang, Quan-guo Cheng, Jian-zhong Li, Hong-hui Liu

{"title":"Spent Lithium-Ion Battery Recycling: Multi-stage Synergistic Deep Removal of Impurities and Lithium Extraction","authors":"Wen-bo Lou, Dong-yan Liu, Yun Wang, Da Zhao, Zi-cheng Sun, Yi Zou, Sheng-yan Wang, Quan-guo Cheng, Jian-zhong Li, Hong-hui Liu","doi":"10.1007/s11814-025-00382-8","DOIUrl":"10.1007/s11814-025-00382-8","url":null,"abstract":"<div>Nowadays, the recycling of spent lithium-ion batteries is a key concern in the energy field. Among them, for the purification of Li-containing mother liquor, the targeted multi-means coupling impurity removal methods are mostly employed, which however, inevitably lead to a Li loss of 3–5% and high costs. In this study, a multi-stage hydrolysis method, combining the residual P and Al, Mg, Cu, Zn, Ni, Fe, forming hydroxide-phosphate co-precipitation for the synergistic impurity separation, was adopted. Thermodynamic calculations show that Li+ and Mg2+ are insensitive to pH when pH < 10, and Al, Cu, Zn, Ni, Fe behave similarly in nature. The impurities should be precipitated as: Fe3+ > Al3+ > Cu2+ > Ni2+ > Zn2+ > Mg2+, with phosphate precipitating first, followed by converting into hydroxide as pH rising. Actual results showed that the order was P > Fe & Al & Cu & Ni & Zn > Mg, and the process was divided into three steps, with separation points at pH = 2.37, 8.66, and 11.00, respectively. All the impurity removal efficiencies were close to 100%, the loss of Li was 1.74%. The optimal conditions for Li2CO3 precipitation were determined: an Na2CO3 addition of 1.5 times the theoretical amount, a temperature of 90 °C, a reaction time of 4 h, and a one-time addition of dosing method. Li precipitation efficiency reaches 90.10%, with a 99.95% purity. The results effectively reduced Li losses and provided a practically feasible basis for the industrial purification of Li-containing mother liquor.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"621 - 632"},"PeriodicalIF":2.9,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481117","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}

引用次数: 0

Search for the Sustainable Optimum: Review of 5-(Hydroxymethyl)furfural Stability Under Various Reaction Conditions 寻找可持续优化：5-（羟甲基）糠醛在不同反应条件下稳定性的研究进展

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-20 DOI: 10.1007/s11814-025-00384-6

Anastasia N. Golysheva, Denis A. Kolykhalov, Bogdan Ya. Karlinskii

{"title":"Search for the Sustainable Optimum: Review of 5-(Hydroxymethyl)furfural Stability Under Various Reaction Conditions","authors":"Anastasia N. Golysheva, Denis A. Kolykhalov, Bogdan Ya. Karlinskii","doi":"10.1007/s11814-025-00384-6","DOIUrl":"10.1007/s11814-025-00384-6","url":null,"abstract":"<div>Furanic platform chemicals derived from renewable plant biomass offer a multitude of potential applications in materials science and the chemical industry, positioning them as promising alternatives to nonrenewable petrochemical feedstock products. However, the relatively low stability of the pseudoaromatic furan core poses a significant challenge because of the limited range of available reaction conditions for the preparation and subsequent chemical modification of these furanic platforms. In this review, our focus lies on investigating the stability of 5-(hydroxymethyl)furfural (HMF), one of the most extensively studied platform chemicals, with the aim of identifying optimal conditions for its synthesis and further functionalization. The goal of this study is to delineate the limits of renewable furan stability by identifying optimal conditions with minimal tarring and the occurrence of side reactions, a crucial aspect for both ongoing laboratory research and the development of reactors for large-scale production of HMF derivatives in the industry.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"483 - 504"},"PeriodicalIF":2.9,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481057","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}

引用次数: 0

Synthesis, Structural and Photocatalytic Behavior of Sn–F Co-Doped TiO2 Nanomaterials Sn-F共掺杂TiO2纳米材料的合成、结构及光催化性能

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-15 DOI: 10.1007/s11814-024-00374-0

Maria G. Volkova, Ilya V. Pankov, Ekaterina M. Bayan

{"title":"Synthesis, Structural and Photocatalytic Behavior of Sn–F Co-Doped TiO2 Nanomaterials","authors":"Maria G. Volkova, Ilya V. Pankov, Ekaterina M. Bayan","doi":"10.1007/s11814-024-00374-0","DOIUrl":"10.1007/s11814-024-00374-0","url":null,"abstract":"<div>Sn–F co-doped TiO2 nanomaterials were synthesized using the modified sol–gel method. The influence of different amounts of modifying agents (0.3–10 mol.% Sn4+ and 0.3–10 mol.% F−) and calcination temperature (500–800 °C) on the properties of the resulting nanomaterials was studied. Nanomaterials were analyzed using X-ray diffraction, high-resolution transmission electron microscopy, energy dispersive X-ray spectroscopy, selected area electron diffraction, differential scanning calorimetric and thermogravimetric analyses, UV–visible diffuse reflectance spectroscopy and other methods. It was found that the amounts of introduced Sn4+ and F− ions and the temperature of the heat treatment regulate the phase composition and particle size of the resulting nanomaterials, as well as adjust the photocatalytic properties of the materials to be activated by UV and visible light. The materials are nanoscale, with an average size is 13–57 nm depending on the synthesis conditions. The best photocatalytic performance was observed for a material containing 0.3 mol.% Sn4+ and 0.6 mol.% F−. Co-doping of TiO2 with F− and Sn4+ ions significantly enhances the photocatalytic properties of TiO2 in both visible and ultraviolet ranges, owing to a decrease in the band gap.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"689 - 699"},"PeriodicalIF":2.9,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481171","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}

引用次数: 0

Synthesis of Mo2C@CeO2@Fe3O4 particles for enhancing three-dimensional heterogeneous electro-Fenton degradation of MIT and HEDP Mo2C@CeO2@Fe3O4增强MIT和HEDP三维非均相电fenton降解的合成

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-14 DOI: 10.1007/s11814-025-00386-4

Qian Rao, Hui-qiang Li, Ping Yang, Ziou Guo

{"title":"Synthesis of Mo2C@CeO2@Fe3O4 particles for enhancing three-dimensional heterogeneous electro-Fenton degradation of MIT and HEDP","authors":"Qian Rao, Hui-qiang Li, Ping Yang, Ziou Guo","doi":"10.1007/s11814-025-00386-4","DOIUrl":"10.1007/s11814-025-00386-4","url":null,"abstract":"<div>Mo2C@Fe3O4 and three kinds of MO2-doped Mo2C@Fe3O4 were successfully fabricated as the Mo2C@TiO2@Fe3O4, Mo2C@MoO2@Fe3O4 and Mo2C@CeO2@Fe3O4 particles for the degradation of 2-methyl-4-isothiazolin-3-one and 1-hydroxy-1,1-diphosphonoethane in a three-dimensional electro-Fenton system. The catalyst particles showed an enhancement for the catalytic activity in the system. Furthermore, the Mo2C@CeO2@Fe3O4 particles exhibited superior activity for 2-methyl-4-isothiazolin-3-one and 1-hydroxy-1,1-diphosphonoethane degradation compared to the other two particles. Based on the characterization of the synthesized particles, leaching concentration of Fe2+, generation of ({H}_{2}{O}_{2}), (bullet OH), ({O}_{2}^{bullet -}), the reasons for the difference in pollutant degradation performance among the three type particles were comprehensively analyzed. At last, some important experimental parameters, such as particles dosage, current density and aeration intensity, which would obviously affect MIT and HEDP degradation performance were studied. Using the Mo2C@CeO2@Fe3O4 as catalytic particles, optimal 2-methyl-4-isothiazolin-3-one and 1-hydroxy-1,1-diphosphonoethane degradation rates were 97.2% and 73.8% with 0.5 g of particle dosage, 97.22% and 73.75% with 300 mA of current density, and 97.28% and 73.71% with 0.1 L min−1 of aeration intensity.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"563 - 576"},"PeriodicalIF":2.9,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481106","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}

引用次数: 0

Advanced Distillation Technologies for Dimethyl Ether Production: A Comprehensive Techno-economic Evaluation 二甲醚生产先进精馏技术：综合技术经济评价

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-14 DOI: 10.1007/s11814-025-00387-3

Muhammad Fikri Ramadhan, Rahma Muthia

{"title":"Advanced Distillation Technologies for Dimethyl Ether Production: A Comprehensive Techno-economic Evaluation","authors":"Muhammad Fikri Ramadhan, Rahma Muthia","doi":"10.1007/s11814-025-00387-3","DOIUrl":"10.1007/s11814-025-00387-3","url":null,"abstract":"<div>Dimethyl ether is a promising alternative energy source to liquefied petroleum gas and diesel fuel due to its cleaner combustion properties. However, dimethyl ether production from methanol typically suffers from intense energy consumption, high CO2 emissions, and large costs. Advanced distillation technologies, particularly reactive distillation (RD) and dividing-wall column (DWC), are potentially capable of addressing such issues. The present study evaluates the techno-economic performance of those advanced distillation technologies by accounting for a complete set of reaction and separation functions and an identical catalyst, i.e., Amberlyst-35, for each process configuration. The use of a common catalyst ensures that the identified performance differences are attributable to the technology configurations themselves rather than the variations in catalyst type. The finding interestingly suggests that the DWC scheme outperforms both conventional reactor-distillation and RD schemes. The specific energy consumptions for the conventional, RD and DWC schemes are 1.74, 4.10 and 1.41 GJ/ton, respectively, while the CO2 emissions for those schemes are 0.09, 0.22 and 0.08 tons CO2/ton, respectively. The DWC scheme offers the lowest total annual cost, i.e., $1,601,733/year, followed by the conventional and RD schemes, which are $1,844,407/year and $2,585,633/year, respectively.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"505 - 527"},"PeriodicalIF":2.9,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481105","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}

引用次数: 0

Solubility of Nd(III) Trihydroxide Solid Phase at Neutral to Weakly Alkaline Conditions: A Colorimetric and Quantitative Study 中性至弱碱性条件下三氢氧化钕固相溶解度的比色和定量研究

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-10 DOI: 10.1007/s11814-024-00372-2

Ranyeong Choi, Jun-Yeop Lee

{"title":"Solubility of Nd(III) Trihydroxide Solid Phase at Neutral to Weakly Alkaline Conditions: A Colorimetric and Quantitative Study","authors":"Ranyeong Choi, Jun-Yeop Lee","doi":"10.1007/s11814-024-00372-2","DOIUrl":"10.1007/s11814-024-00372-2","url":null,"abstract":"<div>The dissolution reaction of Nd(III) trihydroxide solid phase was quantitatively investigated in the pHc range of 6.8 to 8.0 at 0.1 M NaCl medium under carbonate-free condition. Prior to the solubility experiment, the solid phase characterization was conducted on the starting material using various analytical methods such as XRD, TA-DTG, and SEM/TEM, to obtain stoichiometric information about the synthesized Nd(III) solid phase. For the solubility experiment, the Nd(III) solid phase was equilibrated by means of the undersaturation approach, and the concentrations of aqueous Nd(III) species were quantified using UV–Vis absorption spectroscopy coupled with the liquid waveguide capillary flow cell (LWCC) and ICP-MS/OES. After filtering the aqueous solution through both syringe and membrane filters, the measured aqueous Nd(III) concentration indicated that no or trivial contribution from the colloidal phase of Nd(III) during the solubility experiment. Based on chemical thermodynamic calculations using experimental results and literature data, the solubility product constant of Nd(III) trihydroxide solid phase was determined to be log*K0s,0 = 18.14 ± 0.53 at infinite dilution by applying the SIT approach (i.e., I = 0). This study demonstrated that UV–Vis absorption spectroscopy coupled with LWCC can be effectively employed for the quantitative analysis of aqueous lanthanide ions at low concentrations, even without the need for additional complexing agents.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 6","pages":"1225 - 1235"},"PeriodicalIF":2.9,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135368","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}

引用次数: 0

Effect of Surface Tension on Thermocapillary Convection-Driven Droplet Transport 表面张力对热毛细对流驱动的液滴输送的影响

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-07 DOI: 10.1007/s11814-024-00368-y

Hyesun Hwang, Syuji Fujii, Sanghyuk Wooh

{"title":"Effect of Surface Tension on Thermocapillary Convection-Driven Droplet Transport","authors":"Hyesun Hwang, Syuji Fujii, Sanghyuk Wooh","doi":"10.1007/s11814-024-00368-y","DOIUrl":"10.1007/s11814-024-00368-y","url":null,"abstract":"<div>The transport of microliter-scale droplets on solid surfaces is critical for various applications, including microfluidics and microengines. Recently, droplet manipulation strategy using thermocapillary convection has received attention due to its precise and remote controllability. The mobility of liquid droplets in this method depends on several parameters, such as laser power and the light absorption coefficient. Additionally, surface tension significantly influences droplet movement although its underlying mechanism remains unclear. In this study, we investigate the effect of surface tension on droplet movement via thermocapillary convection. Aqueous dispersions of polypyrrole (PPy) nanoparticles (NPs), which absorb near-infrared (NIR) light and convert it into heat, are employed as droplets. Upon NIR laser irradiation, the PPy droplets generate localized heat, resulting in thermocapillary convection. The lubricated surface (LuS) is used as a substrate. Due to the mobile lubricant layer, droplets are easy to move with low friction. Surface tension is modified by adding a surfactant, and the droplet movement speed increases with decreasing surface tension. Here, this phenomenon is investigating the parameters acting to Marangoni force: contact line length and surface tension gradient. We confirm that the Marangoni force, which propels the droplet, is induced more effectively by low surface tension liquids. This study provides fundamental insights into droplet behavior governed by wettability differences, advancing droplet manipulation techniques for diverse fluidic systems.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"529 - 536"},"PeriodicalIF":2.9,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480873","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}

引用次数: 0

Review of Hydrogen Production Using Organic Waste Materials: Role of Industry 4.0 in Waste Valuation 有机废弃物制氢研究综述：工业4.0在废弃物价值评估中的作用

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-07 DOI: 10.1007/s11814-024-00367-z

Anshi Mehra, Neeraj Raja Ram, Nirmal Kumar Srivastava, G. N. Nikhil

{"title":"Review of Hydrogen Production Using Organic Waste Materials: Role of Industry 4.0 in Waste Valuation","authors":"Anshi Mehra, Neeraj Raja Ram, Nirmal Kumar Srivastava, G. N. Nikhil","doi":"10.1007/s11814-024-00367-z","DOIUrl":"10.1007/s11814-024-00367-z","url":null,"abstract":"<div>Attempts are made to utilise waste organic biomass to produce fuels, chemicals, energy, power, and by-products for many mercantile applications. Hydrogen is a demanding fuel with the highest calorific value, and conventional chemical processes have raised specific environmental concerns. Alternatively, such biodegradable organic waste can be managed better with fermentation technologies and also for producing hydrogen, which is more environmentally friendly and cost-effective. Given environmental concerns, retrofitting the current chemical industry 3.0 with sustainable product management is vital. This review communication provides crucial information about the chemical industry’s restructuring within the scope of using the circular economy principle in circular chemistry in the burgeoning industry 4.0 scenario. It also focuses on recovering energy from waste materials, a potential strategy for mitigating environmental effects. More case studies utilising organic waste as feedstock in bio-refinery processes will be of interest in future to attain environmental sustainability, which is also highlighted in parallel.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"455 - 481"},"PeriodicalIF":2.9,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480872","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}

引用次数: 0

Enhanced Adsorption of Mn(II) from Wastewater Using Activated Carbon-Modified Fly Ash Geopolymer Adsorbent 活性炭改性粉煤灰地聚合物吸附剂对废水中锰（II）的强化吸附

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2025-01-03 DOI: 10.1007/s11814-024-00370-4

Hossein Ebrahimi, Asghar Azizi, Kumars Seifpanahi Shabani

{"title":"Enhanced Adsorption of Mn(II) from Wastewater Using Activated Carbon-Modified Fly Ash Geopolymer Adsorbent","authors":"Hossein Ebrahimi, Asghar Azizi, Kumars Seifpanahi Shabani","doi":"10.1007/s11814-024-00370-4","DOIUrl":"10.1007/s11814-024-00370-4","url":null,"abstract":"<div>This study focuses on synthesizing and optimizing a fly ash-based geopolymer modified with activated carbon to efficiently remove manganese from contaminated solutions within a permeable reactive barrier. Using the RSM–BBD strategy, the synthesis process was optimized, resulting in influential parameters set at 40% activated carbon with fly ash as a precursor, 12 M NaOH concentration, 2.5 Na2SiO3/NaOH ratio, 55 °C curing temperature, 14 h curing time, 30% solid content, and 37 kHz sonication. Characterization via FESEM revealed the sorbent’s high porosity, crystalline nature, and heterogeneous surface with a wide size distribution. The potential of the synthesized geopolymer sorbent to eliminate Mn2+ from synthetic wastewater was further assessed using the RSM-CCD approach. Results showed complete removal of Mn2+ ions at a solution pH of approximately 2.3, adsorbent dosage of 0.2 g, pollutant solution volume of 20 ml, pollutant concentration of 500 ppm, stirring rate of around 300 rpm, and contact time of approximately 60 min. Additionally, sorption kinetics, isotherms, thermodynamics, and possible adsorption mechanisms were scrutinized. Kinetic data revealed that the phenomenological internal mass transfer (IMT) model provided the best fit, with internal diffusion as the rate-controlling mechanism. Isotherm analysis confirmed multilayered and homogeneous interactions between the adsorbent and adsorbate, with a physical adsorption type. Thermodynamic results indicated feasible, spontaneous, and endothermic sorption.</div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 3","pages":"595 - 620"},"PeriodicalIF":2.9,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480977","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}

引用次数: 0