Article
Chemistry, Analytical
Faleh Z. Alqahtany, M. Khalil
Summary: A comparative study was conducted on the adsorption of (140)La and (144)Ce from water solutions on ZnO-C and ZnO-G using Nerium oleander flowers extract. The results showed that ZnO-G had slightly higher adsorption efficiency for (140)La and (144)Ce compared to ZnO-C, and the Langmuir and pseudo-second order kinetic models were highly suitable for explaining the adsorption process.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Physical
Sesegma Ts. Khankhasaeva, Sayana V. Badmaeva, Marina V. Ukhinova
Summary: The adsorption of diclofenac (DCF), a common pharmaceutical pollutant, on Fe2O3-pillared montmorillonites (Fe-PMts) was studied. Fe-PMts were synthesized by intercalation of natural montmorillonite with iron polyoxocations. The pillaring process significantly increased the specific surface area and sorption capacity of the clay. The pH, sorbent content, DCF concentration, and temperature were found to be the main factors affecting DCF adsorption. The kinetic data and adsorption isotherm were analyzed using various models, and the results showed that the adsorption followed pseudo-second order kinetics and Langmuir isotherm. The thermodynamic parameters indicated that the adsorption of DCF on Fe-PMt was spontaneous and exothermic. Fe-PMt was proven to be an effective and environmentally friendly sorbent for DCF removal in pharmaceutical wastewater treatment.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Environmental
S. Aguirre-Contreras, R. Leyva-Ramos, R. Ocampo-Perez, C. G. Aguilar-Madera, J. V. Flores-Cano, N. A. Medellin-Castillo
Summary: The mathematical modeling of the dynamic adsorption of 8-Hydroxyquinoline on activated carbon in batch and fixed-bed adsorbers is described in this study. The model considers mass transport phenomena and includes axial dispersion, convective transport, intraparticle diffusion mechanisms, and adsorption on the active site. A methodology based on adsorption equilibrium and rate studies is proposed to solve the model, without considering fitting the mass transport parameters for breakthrough curve prediction, which is an important advancement in fixed-bed column design. The equilibrium results show that 8-HQ adsorbs onto activated carbon through dispersive and hydrophobic interactions, with a mass adsorbed of 454 mg g-1. The kinetic study reveals that achieving equilibrium is faster under turbulent stirring regime, and intraparticle transport is governed by surface diffusion. By using information obtained from the batch regime, the packed bed behavior can be interpreted and predicted in a wide range of operational conditions with an error of 10.6% in breakthrough point prediction.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Poulami Datta, Pankaj Tiwari, Lalit M. Pandey
Summary: This study examines the adsorption behavior of Surfactin on sandstone silica samples at different temperatures and analyzes the stability of the biosurfactant. The results suggest that the Freundlich isotherm model and Elovich kinetics provide better descriptions of Surfactin adsorption, and the process is thermodynamically spontaneous.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Edwin Andrew Ofudje, Ezekiel F. Sodiya, Olajire S. Olanrele, Fatai Akinwunmi
Summary: This study investigated the use of chemically synthesized apatite (CHAp) powder as an adsorbent for removing Cd2+ from water. The effects of time, initial Cd2+ concentration, amount of CHAp, temperature, and solution pH on the adsorption process were studied. Various analytical techniques were used to analyze the synthesized hydroxyapatite (HAp) powder and confirm its adsorption capacity. The results showed that CHAp performed well as an adsorbent for Cd2+ and could be used in bioremediation applications.
Article
Engineering, Environmental
Pramod Kumbhar, Dattatray Narale, Rakhee Bhosale, Chitra Jambhale, Jin-Hyeok Kim, Sanjay Kolekar
Summary: This study reports the synthesis and application of tea waste/Fe3O4 magnetic composite for the adsorption of crystal violet dye from aqueous solution. The composite showed high efficiency and adsorption capacity for the removal of CV dye. The adsorption process was found to be spontaneous and heat releasing.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Gino Alexander Chavez-Prado, Adams Brayan Benavides-Garcia, Luis Angel Zambrano-Intriago, Naga Raju Maddela, Luis Santiago Quiroz-Fernandez, Ricardo Jose Baquerizo-Crespo, Joan Manuel Rodriguez-Diaz
Summary: This study evaluated the use of Tagua shell as an adsorbent for removing lead (II) from aqueous media. The Langmuir and Sips models showed high coefficients of determination at different temperatures, making them the best representations of the adsorption process. The thermodynamics study indicated that the process is endothermic, spontaneous, and thermodynamically stable.
Article
Environmental Sciences
Tawfik El Moussaoui
Summary: Olive mill wastewater is a severe environmental problem in Mediterranean producer countries. This study provides a comprehensive analysis of activated sludge biomass and crucial process parameters in the treatment of olive mill wastewater. The results show that increasing the mass ratio of olive mill wastewater can improve the treatment efficiency of the activated sludge system, after an acclimation step.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Zhenjian Liu, Chao Pu, Xidong Du, Hong Yin, Yugang Cheng
Summary: The combined effects of surface chemistry and pore structure on water vapor adsorption characteristics of coal were studied. The results showed that water vapor adsorption depends on surface chemistry but not pore structure. The monolayer adsorption capacity decreases with increasing coal rank. The diffusion coefficient also decreases with coal rank, and the diffusion activation energy for high-volatile bituminous is higher than the other coals.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
D. Wang, L. Luo, Y. Chen, S. Chen, X. Qiu, M. Liu
Summary: Fluorine pollution is a significant global concern that has adverse effects on aquatic organisms and human life. This study demonstrates that solid waste of red mud from the aluminum industry can be converted into efficient fluoride adsorbents by incorporating cerium-based compounds. The optimized red mud-derived fluoride adsorbents exhibit high adsorption capacity and can effectively treat heavily fluorinated wastewater.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Physical
Zuleyha Bingul
Summary: The study investigated the removal of methylene blue dye using natural clay and found that the Langmuir isotherm model was suitable for describing the adsorption process. The highest removal efficiency was achieved with 0.3 g L-1 adsorbent concentration and 20 mg L-1 dye concentration, reaching 94.69%.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Engineering, Environmental
Mehpara Khatoon, Huma Ajab, Asim Yaqub, Muhammad Zia Ul Haq, Muhammad Junaid
Summary: This study explores the possibility of adsorbing Cr(VI) ions in tannery industrial effluent using a novel IDW@Fe3O4 nanocomposite. A simple and cost-effective co-precipitation method was used to synthesize the biosorbent. The characteristics and variation of the nanocomposite were analyzed using SEM, FT-IR, XRD, and TGA, confirming its feasibility for the targeted analyte. The optimized conditions achieved a removal efficiency of 92% for Cr(VI) ions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Magdalena Blachnio, Anna Derylo-Marczewska, Szymon Winter, Malgorzata Zienkiewicz-Strzalka
Summary: Mesoporous carbons with differentiated properties were synthesized by impregnation of organized silicas, and their structural, surface, and adsorption properties were investigated using various methods. Experimental data analysis confirmed the applicability of mesoporous carbons for dye removal, with techniques such as SAXS, nitrogen sorption, potentiometric titration, and TEM providing complementary results on porosity and structural ordering. Adsorption experiments, particularly kinetic measurements, demonstrated the utility of mesoporous carbons in dye removal considering adsorption uptake and rate.
Article
Chemistry, Analytical
H. A. Madbouly, H. S. Hassan
Summary: In this study, polyaniline/cerium composite (PAN/CeO2) was prepared using sol-gel polymeric method and characterized by different techniques. The results showed that PAN/CeO2 exhibited good adsorption performance towards Cs(I) and Co(II).
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Carole Mutschler, Juliana Aparicio, Ilham Mokbel, Mickael Capron, Pascal Fongarland, Marcia Araque, Clemence Nikitine
Summary: The protection of the acid function by esterification reaction is a promising alternative for the oxidation of carboxylic acids. Reactive distillation allows for the simultaneous recovery of carboxylic acids and the removal of water. Experimental and simulation studies showed that heterogeneous catalysis with TiO2-Wo(x) can achieve a higher conversion rate in reactive distillation.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Arash Sobouti, Bahram Rezai, Mohammad Taghi Rayati, Fatemeh Sadat Hoseinian
Summary: Predicting the recoveries of lead and zinc during the leaching process is essential for evaluating process efficiency. New predictive models based on gene expression programming have been developed and proven to be sufficient for predicting the recoveries.
SEPARATION SCIENCE AND TECHNOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Maryam Khezri, Bahram Rezai, Ali Akbar Abdollahzadeh, Benjamin P. Wilson, Mehdi Molaeinasab, Mari Lundstrom
Summary: The study showed that mechanical activation and particle size have significant effects on the leaching and electrochemical behavior of chalcopyrite. By conducting leaching experiments and electrochemical analysis, it was found that glycine leaching with mechanical activation pretreatment can be a promising method for extracting copper efficiently from chalcopyrite concentrates.
Article
Chemistry, Multidisciplinary
Mehdi Zakeri Khatir, Mahmoud Abdollahy, Mohammad Reza Khalesi, Bahram Rezai
Summary: This study investigated the effect of various ions on the selective ion flotation of neodymium, and determined the optimum conditions for neodymium ion flotation. Other ions' influence on neodymium ion flotation was also evaluated.
SEPARATION SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Ebrahim Allahkarami, Bahram Rezai, Mohsen Bozorgmehr, Saeed Adib
Summary: In this study, a binary mixture of Cyanex 302 and D2EHPA in kerosene was used to extract neodymium from nitric acid medium. The efficient reagent for stripping neodymium was found to be nitric acid. The Cyanex 302+D2EHPA system not only increased the extraction efficiency of neodymium but also significantly improved the selectivity.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2021)
Article
Materials Science, Multidisciplinary
Hamed Gholami, Bahram Rezai, Ahmad Hassanzadeh, Akbar Mehdilo, Mohammadreza Yarahmadi
Summary: This study investigates the kinetics of microwave-assisted grinding and flotation in a porphyry copper deposit. Results show that increasing exposure time accelerates ore breakage rate, but excessive irradiation time leads to a decrease in flotation rate constants and recoveries. Microwave-pre-treated copper ore is ground faster than untreated ore, but their floatabilities are similar.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Mehdi Zakeri Khatir, Mahmoud Abdollahy, Mohammad Reza Khalesi, Bahram Rezai
Summary: Selective ion flotation of neodymium ions from aluminum, iron, and calcium ions using SDS as a surfactant and D2EHPA as an extractant was carried out in this study. The results showed that neodymium ion recovery was enhanced by D2EHPA, while calcium ion removal decreased and iron and aluminum ion removal increased. The Gibbs free energy and complex structures of neodymium and aluminum ions with D2EHPA affected the selective separation of neodymium ions from aluminum.
Article
Chemistry, Physical
Ebrahim Allahkarami, Nona Soleimanpour Moghadam, Bahareh Jamrotbe, Amirreza Azadmehr
Summary: This study introduces a low-cost adsorbent, vermiculite-Alginic composite (VMT-ALG), for the uptake of Ni(II) and Cu(II). The composite was characterized and various process parameters were optimized. The experimental data showed that the Freundlich adsorption model was the best isotherm model for describing the adsorption of Cu(II) and Ni(II) by VMT-ALG. Kinetic studies indicated that intra-particle diffusion was the rate-limiting step of the adsorption process. Thermodynamic studies revealed that the adsorption process was physisorption and endothermic. Fixed-bed column studies were conducted under different flow rates and initial concentrations, and the results were successfully explained using the Thomas and Yoon-Nelson models. Continuous adsorption studies indicated that the adsorption capacity of Cu(II) and Ni(II) increased with an increase in the concentration of metal ions and decreased with an increase in the flow rate.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
E. Allahkarami, B. Rezai
Summary: This research investigated the solvent extraction of Cerium (III) using Cyanex 572, focusing on the variations of pH, extractant concentration, nitrate ion concentration, and contact time. The developed model showed a good correlation between predicted and measured data. pH and extractant concentration were found to be the most significant parameters affecting the cerium extraction. Kerosene was identified as an efficient diluent for the extraction of cerium.
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK
(2022)
Article
Physics, Condensed Matter
Hossein Nourmohamadi, Mehdi D. Esrafili, Valeh Aghazadeh, Bahram Rezai
Summary: The study investigates the effect of silver cation on the elemental sulfur passive layer on chalcopyrite surface using density functional theory calculations and molecular dynamics simulations. The results show that the addition of Ag+ cation alters the electronic properties of the passive layer, making it reactive.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Environmental Sciences
Ebrahim Allahkarami, Amirreza Azadmehr, Fahimeh Noroozi, Shayan Farrokhi, Mika Sillanpaa
Summary: This research aimed to develop a low-cost adsorbent for the removal of nitrate ion from aqueous solutions. The composite material was characterized and the influential variables on nitrate adsorption were studied. Fixed-bed column experiments were conducted and the results were successfully explained using different models.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Chemical
Mehdi Zakeri Khatir, Mahmoud Abdollahy, Mohammad Reza Khalesi, Bahram Rezai
Summary: Fluorine ion was used as a chelating agent to selectively separate neodymium ion from aluminum ion. The presence of fluorine ions enhanced the selective separation of neodymium ion. However, the selectivity coefficient decreased with increasing fluorine ion concentration. The experimental results also confirmed the stronger interaction between fluorine ions and neodymium ions.
MINERALS ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Ebrahim Allahkarami, Bahram Rezai, Rama Rao Karri, Nabisab Mujawar Mubarak
Summary: This study investigated the extraction of cerium (Ce (III)) from nitrate media by Cyanex 572 and developed predictive models based on intelligent techniques. The results showed that pH was the most influential parameter on cerium extraction efficiency.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Esmaeil Allahkarami, Ebrahim Allahkarami, Amirreza Azadmehr
Summary: The main aim of this research is to synthesize a schist/alginate composite adsorbent for the removal of heavy metals from waste streams. The developed adsorbent shows good adsorption capacity, kinetic fit, and thermodynamic properties. The reusability of the adsorbent is also satisfactory, making it a commercially attractive and green method.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Engineering, Environmental
Ebrahim Allahkarami, Bahram Rezai
Summary: This review article provides recent progress regarding the separation and purification of cerium by different methods, with solvent extraction (SX) being a popular technique for high purity cerium commercial production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Xingxing Hu, Lingjie Liu, Yanmeng Bi, Lu Li, Chunsheng Qiu, Jingjie Yu, Shaopo Wang
Summary: In this study, the impact of exogenous folate on the start-up process of single-stage partial nitritation-anammox (SPNA) was evaluated using two lab-scale reactors. The results showed that folate addition can enhance nitrogen removal rate, extracellular polymeric substances production, hydrazine oxidase and dehydrogenase activity, as well as the relative abundance of Candidatus Brocadia.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Shaocang He, Tingting Shen, Jing Sun, Haoqi Pan, Chenxu Sun, Tianpeng Li, Runyao Li, Enshan Zhang
Summary: A novel process of acid leaching neutralization was developed for the preparation of inorganic polymeric composite ferric aluminum silicate coagulant (CFAS) using solid waste coal gasification coarse slag (CGCS). The optimized preparation process was determined through single-factor experiment and the performance of CFAS was evaluated for domestic sewage treatment. The results showed that CFAS exhibited excellent coagulation ability and achieved significant removal efficiency for turbidity, ammonia nitrogen, and chemical oxygen demand.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Kinga Szatmari, Sandor Nemeth, Alex Kummer
Summary: In this article, a resilience-based reinforcement learning approach is proposed to address the potential thermal runaway issue in batch reactors. By calculating the resilience metric for reactors and utilizing Deep Q-learning to decide when to intervene in the system, resilient-based mitigation systems can be effectively developed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Bingyou Jiang, Qi Yao, Mingqing Su, Jingjing Li, Kunlun Lu, Dawei Ding, Han Hong
Summary: This study investigates the inhibitory characteristics and mechanisms of ABC powder on coal powder explosion. The addition of ABC powder significantly decreases the maximum explosion pressure and can completely suppress coal dust explosions. The study also reveals the thermal decomposition characteristics and reaction kinetics of the mixed system.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Kubilay Bayramoglu, Mustafa Nuran
Summary: This study examines the feasibility of using pyrolytic oil from waste tires as fuel in diesel engines, and evaluates its energy, exergy, and sustainability. The results indicate that pyrolytic oil has potential as a renewable fuel source with relatively high thermal efficiency.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Xinru Duan, Yejia Lv, Jiaxing Hong, Jianzhong Wu, Jia Zhang, Yang Yue, Guangren Qian
Summary: This study successfully prepared a tube reactor with optimized catalyst formula, which showed good performance in removing dioxins and other pollutants in the experiments.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Jiaoyang Du, Xueming Dang, Xiaorong Gan, Xin Cui, Huimin Zhao
Summary: In this study, a photocatalyst-enzyme hybrid system was constructed, which solved the issue of enzyme inactivation caused by high concentration of H2O2 through photocatalytic in-situ H2O2 production, and improved the stability and catalytic efficiency of the enzyme. The effectiveness of the system in treating phenolic EDCs was confirmed through experiments.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Fu-Rong Xiu, Longsheng Zhan, Yingying Qi, Xinyue Lei, Jiali Wang, Haipeng Zhou, Wenting Shao
Summary: This study developed a synergetic and high-efficiency treatment of waste tantalum capacitors (WTCs) and polyvinyl chloride (PVC) using subcritical water process. The treatment significantly reduced the temperature and reaction time for metal tantalum recovery from WTCs, and improved the dechlorination efficiency of PVC. The optimized conditions resulted in 100% resin conversion efficiency of WTCs and 97.39% dechlorination efficiency of PVC. The interaction between decomposition products of WTCs and PVC produced a high level of benzoic acid.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Bingda Li, Jiaming Song, Yuting Li, Chaoying Meng, Shuxian Wang, Linghao Zong, Honggang Ye, Yishuai Jing, Feng Teng, Peng Hu, Haibo Fan, Guangde Chen, Xin Zhao
Summary: CdPS3 nanosheets, especially those exfoliated by sodium cholate, have shown highly efficient photocatalytic degradation performance. The strong dark adsorption and dye-sensitized photocatalytic properties of CdPS3 nanosheets contribute to high degradation efficiencies of various pollutants.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Dongxu Ouyang, Yimei Pang, Bo Liu, Zhirong Wang
Summary: This study investigates the thermal runaway features of lithium-ion cells under tunnel conditions, considering different states of charge and tunnel ceilings. The results show that the tunnel visibility is affected by the smoke generated during thermal runaway, and the shape of the tunnel ceiling influences the temperature rise differently.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
