Article
Engineering, Environmental
Ronbanchob Apiratikul, Khim Hoong Chu
Summary: The study found that traditional symmetric models applied to asymmetric breakthrough data may lead to poor fits, hence modified versions of the Bohart-Adams, Thomas, and Yoon-Nelson models with logarithmic transformation showed more robust fitting capabilities, providing more reliable estimates compared to the original models.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Shuqin Bai, Jiaxin Li, Wei Ding, Shuxuan Chen, Ru Ya
Summary: This study investigated the continuous removal of toxic element boron from aqueous solution using a new phenolic hydroxyl modified resin (T-resin). The results showed that the breakthrough time, exhaustion time, and uptake capacity of the column bed increased with increasing column bed height and decreased with increasing influent flow rate. The artificial neural network (ANN) model was found to be more accurate in predicting the breakthrough behavior of the column compared to the conventional models. The adsorption capacity of boron changed during five time regeneration.
Article
Engineering, Environmental
Khim Hoong Chu, Mohd Ali Hashim
Summary: This study compared four breakthrough curve models and found that the log-Gompertz and Chu-Hashim models performed well in predicting antibiotic breakthrough data, showing strong correlations and accurate breakthrough time predictions.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Na Lv, Xiufen Li
Summary: The study investigated the adsorption of phosphorus in low-concentration phosphorus wastewater using a modified calcium-modified attapulgite (Ca-GAT). The study explored the effects of various parameters on dynamic phosphorus adsorption and found that the adsorption ability improved with increased bed height and flow rate, and decreased initial phosphorus concentration. Breakthrough curves were fitted using four models, with the Thomas model determining a maximum adsorption amount of 13.477 mg/g. The study also found that NaOH regeneration had the best effect, and the breakthrough point was achieved after 177 hours in treating actual MBR effluent. These findings suggest that Ca-GAT has potential for the treatment of low-concentration phosphorus wastewater.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Applied
Ahsan Abdul Ghani, Kamakshaiah Charyulu Devarayapalli, Bolam Kim, Youngsu Lim, Gyuhyeon Kim, Jiseon Jang, Dae Sung Lee
Summary: Sodium alginate (SA)-laden two-dimensional Ti3C2Tx MXene and MIL-101(Fe) composite materials were used for the removal of naproxen (NPX) through adsorption and electrochemical regeneration processes. The MX-embedded SA (MX@SA) showed higher NPX adsorption capacity compared to MIL-101(Fe)-embedded SA (MIL-101(Fe)@SA) and MX/MIL-101(Fe) composite embedded SA (MX/MIL-101(Fe)@SA). Optimum parameters for electrochemical regeneration were determined, enabling excellent regeneration over multiple cycles. The regeneration mechanisms involved indirect electro-oxidation and indirect oxidation processes.
CARBOHYDRATE POLYMERS
(2023)
Article
Environmental Sciences
Chunli Zheng, Yingying Yong, Qiaorui Wang, Zishen Lin, Yujie Wang, Youwen Zhang, Chi He
Summary: In this study, an adsorbent (Hydrogel-I) derived from sodium alginate and modified alkaline lignin (MAL) was evaluated for its adsorption performance of Pb(II)-loaded wastewater. The adsorbent was further assessed by packing it into a fixed-bed column and establishing breakthrough curves under different conditions. The results showed that slower inflow rate, down-inflow mode, lower initial concentration, and higher bed depth favored prolonged breakthrough times and saturation times. The adsorption capacity and removal efficiency were higher under the down-inflow mode compared to the top-inflow mode. Hydrogel-I beads exhibited better adsorption performance than other adsorbents based on rate constant and adsorption capacity. The study also demonstrated the regeneration ability of Hydrogel-I beads and identified the adsorption sites through FT-IR analysis.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Chemical
Raissa Antonelli, Geoffroy Roger Pointer Malpass, Meuris Gurgel Carlos da Silva, Melissa Gurgel Adeodato Vieira
Summary: This study investigated the adsorption behavior of antibiotic ciprofloxacin in a calcined Verdelodo clay-packed fixed-bed system. The experimental results showed a breakthrough adsorption capacity of 0.038 mmol g(-1) and a mass transfer zone of 4.29 cm. Comparison with ofloxacin adsorption performance and density functional theory computations were also conducted.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
Qili Hu, Qi Huang, Danni Yang, Hengyuan Liu
Summary: The breakthrough models discussed in this study can accurately describe the diffusion-limited process on heterogeneous surfaces, with the fractal-like Gudermannian model providing the best fit for adsorption of norfloxacin and methylene blue. These models offer important supplements to existing adsorption model studies.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Biochemistry & Molecular Biology
Thiago Peixoto de Araujo, Heloise Beatriz Quesada, Debora Federici dos Santos, Beatriz Carvalho da Silva Fonseca, Jessica Zanette Barbieri, Rosangela Bergamasco, Maria Angelica Simoes Dornellas de Barros
Summary: This study developed and characterized alginate/brewer's spent grain AHC beads, which exhibited a high surface area and excellent adsorption performance for acetaminophen. The importance of alginate in adsorbent development was successfully demonstrated.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Green & Sustainable Science & Technology
Usha Kumari, Asmita Mishra, Hammad Siddiqi, B. C. Meikap
Summary: The defluoridation performance of a simple and efficient adsorbent (SAA), developed by H2SO4 treatment of alumina, was explored in fixed-bed adsorption column (FBAC). The SAA demonstrated superior performance compared to unmodified alumina, especially in conditions of increased bed depth, reduced flow rate, and lower fluoride concentration. Furthermore, the SAA showed successful treatment of industrial effluent and reusability for up to four cycles, indicating its suitability for continuous operation in treating fluoride contaminated industrial wastewater or groundwater.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Thermodynamics
Ianka Cristine Benicio Amador, Keila Guerra Pacheco Nunes, Marcela Andrea Espina de Franco, Bruno Marques Viegas, Emanuel Negrao Macedo, Liliana Amaral Feris, Diego Cardoso Estumano
Summary: This study evaluates different models to simulate the adsorption breakthrough curve of the drug paracetamol on activated carbon. The Yan model was found to best represent the behavior of the evaluated curve.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Green & Sustainable Science & Technology
Rubie Mae D. Fernandez, Renz John R. Estrada, Tomas Ralph B. Tomon, Roger G. Dingcong Jr, Ruben F. Amparado, Rey Y. Capangpangan, Roberto M. Malaluan, Gerard G. Dumancas, Alona A. Lubguban, Arnold C. Alguno, Hernando P. Bacosa, Arnold A. Lubguban
Summary: This study presents a novel polyurethane-activated carbon composite (PACC) as an effective and sustainable adsorbent for treating lead-ion-contaminated waters. The experimental data showed excellent adsorption performance of PACC and indicated potential for regeneration.
Article
Engineering, Environmental
Tobias Reinhardt, Eduard Rott, Philip A. Schneider, Ralf Minke, Harald Schoenberger
Summary: This study found that the introduction of an acidic regeneration step can improve the adsorption performance on GFH when treating real membrane concentrate, achieving 95% adsorption efficiency. However, in alkaline regeneration, desorption performance significantly decreases when the electrical conductivity of NaOH drops below 90 mS/cm. Regularly replacing NaOH can significantly improve desorption performance.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Green & Sustainable Science & Technology
Leila Khalfa, Ali Sdiri, Mohamed Bagane, Maria Luisa Cervera
Summary: A natural clay material from southern Tunisia was used as a low cost sorbent in a column-wise removal of metal pollutants, showing promising results for sustainable wastewater treatment strategies. Column adsorption experiments were carried out for production of cleaner effluents and understanding of main removal mechanisms through a dynamic methodology.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Multidisciplinary
Qili Hu, Dan Wang, Shuyue Pang, Li Xu
Summary: This work proposes two empirical models based on the logistic and Gompertz functions to predict multicomponent breakthrough curves. The equilibrium loading of each component can be calculated by integrating the measured breakthrough curves, and the effects of model parameters on the curves are investigated. The applicability of the models is validated through experiments, and the fitting quality is evaluated using residual plots and coefficient of determination.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Emmanuel Unuabonah, Robert Noeske, Jens Weber, Christina Guenter, Andreas Taubert
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2019)
Article
Environmental Sciences
Seyed-Ali Sajjadi, Alireza Meknati, Eder Claudio Lima, Guilherme L. Dotto, Didilia Ileana Mendoza-Castillo, Ioannis Anastopoulos, Fadi Alakhras, Emmanuel Unuabonah, Pardeep Singh, Ahmad Hosseini-Bandegharaei
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2019)
Article
Nanoscience & Nanotechnology
Chidinma G. Ugwuja, Olawale O. Adelowo, Aemere Ogunlaja, Martins O. Omorogie, Olumide D. Olukanni, Odion O. Ikhimiukor, Ievgeniia Iermak, Gabriel A. Kolawole, Christina Guenter, Andreas Taubert, Olusola Bodede, Roshila Moodley, Natalia M. Inada, Andrea S. S. de Camargo, Emmanuel I. Unuabonah
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Environmental Sciences
Ajibola A. Bayode, Foluso O. Agunbiade, Martins O. Omorogie, Roshila Moodley, Olusola Bodede, Emmanuel Unuabonah
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Engineering, Environmental
Moses O. Alfred, Martins O. Omorogie, Olusola Bodede, Roshila Moodley, Aemere Ogunlaja, Olalere G. Adeyemi, Christina Guenter, Andreas Taubert, Ievgeniia Iermak, Hellmut Eckert, Igor D. A. Silva, Andrea S. S. de Camargo, Artur de Jesus Motheo, Stuart M. Clarke, Emmanuel I. Unuabonah
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Environmental Sciences
Oluwaseyi O. Adesanya, Olumuyiwa O. Ogunlaja, Foluso O. Agunbiade, Aemere Ogunlaja, Emmanuel Unuabonah, Lawrence O. Adebajo
ENVIRONMENTAL FORENSICS
(2020)
Article
Environmental Sciences
Bamidele I. Olu-Owolabi, Paul N. Diagboya, Fanyana M. Mtunzi, Rolf-Alexander Duering
Summary: This study investigated the potential of low-cost kaolinite clay combined with Carica papaya or pine cone seeds for ivermectin adsorption in water treatment processes. The composites showed promising adsorption capacities and reusability, suggesting their economic potential for application in water treatment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Materials Science, Ceramics
Moses O. Alfred, Roshila Moodley, Nurudeen A. Oladoja, Martins O. Omorogie, Olalere G. Adeyemi, Damilare Olorunnisola, Titus Alfred M. Msagati, Artur de Jesus Motheo, Emmanuel Unuabonah
Summary: This study developed a biomass-assisted sunlight-active semiconductor-tungstate-clay photocatalytic composite for removing pharmaceutical contaminants from water. Among the composites prepared, Cu@ZnWO4-K showed the best efficiency for the photodegradation of pharmaceutical contaminants, especially for Ampicillin molecules.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Environmental
Ajibola A. Bayode, Dayana M. dos Santos, Martins O. Omorogie, Olumide D. Olukanni, Roshila Moodley, Olusola Bodede, Foluso O. Agunbiade, Andreas Taubert, Andrea S. S. de Camargo, Hellmut Eckert, Eny Maria Vieira, Emmanuel I. . Unuabonah
Summary: This study reported the development of efficient photosensitive nanocomposites made from clay, Fe2O3, and graphene oxide (GO) for the removal of steroid estrogens from water under visible-light. The main contributors to the photocatalytic efficiency of these nanocomposites are superoxide radicals and holes. The photocatalysts remain active under competitive conditions, with a slight decrease in estrogen oxidation efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Environmental
Ajibola A. Bayode, Eny Maria Vieira, Roshila Moodley, Samson Akpotu, Andrea S. S. de Camargo, Despo Fatta-Kassinos, Emmanuel I. Unuabonah
Summary: This study demonstrates the efficiency of a new visible-light p-n ZnO/GO heterostructured composite catalyst supported on clay with carbon interlayer for the removal of four steroid estrogens in water. The presence of carbon interlayer and graphene oxide were crucial for the visible-light efficiency of the photocatalyst, achieving >89% estrogen removal. Analysis confirmed the formation of hydroxyl radicals responsible for photodegradation of estrogens in the presence of the photocatalytic composite.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Bamidele Olu-Owolabi, Paul N. Diagboya, Fanyana M. Mtunzi, Kayode O. Adebowale, Rolf-Alexander Duering
Summary: Soils are complex mixtures with unique properties that affect the sorption process of contaminants. This study investigated the sorption of ivermectin in two soil types and found that factors such as soil type, solution pH, ivermectin concentration, and temperature influenced the sorption process. The results also showed that the sorption of ivermectin occurred mainly on the soil surfaces and within the soil pores or phases.
Article
Environmental Sciences
Oluwaferanmi B. Otitoju, Moses O. Alfred, Olumuyiwa O. Ogunlaja, Chidinma G. Olorunnisola, Olumide D. Olukanni, Aemere Ogunlaja, Martins O. Omorogie, Emmanuel I. Unuabonah
Summary: This study assesses the occurrence and risk of 2,4-dinitrophenol (2,4-DNP), phenol (PHE), and 2,4,6-trichlorophenol (2,4,6-TCP) in drinking water sources in three states in Nigeria. The phenolic compounds were detected in both groundwater and surface water samples, with higher concentrations found during the rainy season. The presence of 2,4-DNP and 2,4,6-TCP in the water poses serious ecological and toxicological risks to aquatic organisms and humans.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Multidisciplinary Sciences
Abisola O. Egbedina, Kayode O. Adebowale, Bamidele Olu-Owolabi, Emmanuel Unuabonah, Mofoluwake A. Adeyemo
Summary: Carbon materials were prepared from eco-friendly pawpaw seeds and Kaolinite clay using green 'microwave' synthetic methods to give KPZ which was further activated with HCl (A-KPZ). The synthesized materials were employed in the removal of ciprofloxacin and tetracycline from water. The study found that the adsorbents, KPZ and A-KPZ, showed excellent adsorption performance for the two antibiotics, and were cost-effective alternatives to activated carbon for pollutant removal.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Folasegun A. Dawodu, Courage U. Onuh, Kovo G. Akpomie, Emmanuel Unuabonah
SN APPLIED SCIENCES
(2019)
Article
Engineering, Environmental
T. D. Saliu, O. J. Akinyeye, I. A. Ololade, E. Unuabonah, N. A. Oladoja
JOURNAL OF WATER PROCESS ENGINEERING
(2019)
Article
Engineering, Chemical
Andrea Coletto, Pietro Poesio
Summary: Experiments and simulations were conducted to study the air volume fraction and hold-up in a bubble channel reactor. A new signal processing method was proposed to avoid the loss of bubble residence time. The results were in agreement with previous studies and a bubble-scale model was developed to explain the relationship between hold-up and air superficial velocity.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2024)
