Article
Chemistry, Inorganic & Nuclear
Sebastitian Pizarro, Michael Araya, Vivian Garcia, Alvaro Delgadillo
Summary: The Cobaloxime [Co(dpgH)2Cl(INA)] compound was synthesized and its electrochemical behavior and adsorption equilibrium on nanocrystalline titanium dioxide thin films were studied. The addition of NaBH4 resulted in the appearance of new bands in the visible spectrum, which were attributed to metal-to-ligand charge transfer. Theoretical calculations supported this explanation.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Chao Zheng, Hua Song, Yucong Xie, Xuanlin Yang, Liang Lan, Kai Kang, Shupei Bai
Summary: This study used a static volumetric method to measure the water vapor adsorption isotherms on porous activated carbons. Different oxygen-containing functional groups on the surface resulted in a Type-V isotherm for activated carbon and a Type-IV isotherm for ASC-T. The Dual-sites Langmuir-Freundlich equation showed the lowest residual errors, and a new partitioned segment-fitting strategy was developed to accurately describe multi-temperature adsorption isotherms.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Hideo Maruyama, Hideshi Seki
Summary: The research found that there are two different adsorption sites on the surface of activated carbon, with the equilibrium adsorption constant of the strong site significantly larger than that of the weak site. In the adsorption experiments on BPA and DEP, the saturated adsorption densities of the two sites also showed significant differences. The results of modeling for the binary system suggest that the noncompetitive adsorption model can better describe the experimental data.
SEPARATION SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
N. M. El Basiony, Ahmed Nasser, Eslam Hafez, A. Elaraby, Sh Shafek, Ah Elged, Dong - Hwan Kim, Samy M. Shaban
Summary: In this study, a Gemini-nonionic surfactant based on polyethylene glycol (GNs) was used to inhibit the corrosion of carbon steel by acidic solutions. The results showed that GNs effectively reduced the corrosion of carbon steel in 1 M HCl and 0.5 M H2SO4, acting as a hybrid corrosion inhibitor. The adsorption of GNs on the surface of carbon steel followed the Langmuir isotherm model.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Tatiana C. Almeida, Jessica N. Cunha, Eliane D'Elia, Oscar Rosa Mattos
Summary: This article critically evaluates the literature on the use of the Langmuir isotherm in inhibitor research. The validity of the Langmuir isotherm has been challenged, particularly by Walczak et al. (2019), leading to its rejection by some researchers. Imposing limitations on the Langmuir isotherm would affect heterogeneous kinetics, impedance interpretation, and other transient techniques. This discussion paper provides a more in-depth analysis of these aspects.
Article
Acoustics
Zhiming Liu, Ashkan Bahadoran, As'ad Alizadeh, Nafiseh Emami, Tariq J. Al-Musaw, Ahmed Hussien Radie Alawadi, Aseel M. Aljeboree, Mahmoud Shamsborhan, Iman Najafipour, Seyed Erfan Mousavi, Milad Mosallanezhad, Davood Toghraie
Summary: Water pollution management, reduction, and elimination are crucial challenges in current times that put the lives of millions at risk. The increased use of antibiotics, like azithromycin, due to the spread of the coronavirus in December 2019, has led to their presence in surface waters. A ZIF-8/zeolite composite was synthesized using the sonochemical method and its efficacy in adsorption was studied through various parameters. The composite showed promising adsorption capacity, spontaneous and endothermic adsorption process, and successful removal of the drug in multiple cycles.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Biotechnology & Applied Microbiology
Jian Feng, Li Wang, Xia Ran, Bo Xiao, Li Lei, Jinming Zhu, Rong Li, Xiaolan Xi, Guangwei Feng
Summary: This study constructed a 3/g-C3N4 heterojunction by incorporating perovskite ErFeO3 nanoparticles into mesoporous g-C3N4 nanosheets, which exhibited optimal adsorption and photocatalytic performance for the removal of low concentration antibiotic contaminants. The ultrathin and porous structure of the nanosheets increased the specific surface area and reaction active sites, while the heterojunction accelerated the separation of charge carriers and inhibited recombination. This research provides an efficient alternative for the treatment of antibiotic wastewater through the synergistic effect of adsorption and photocatalytic degradation.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Engineering, Chemical
C. Nirmala Rani
Summary: This study investigates the adsorption of caffeine from aqueous solutions using sawdust as a natural, eco-friendly, and low-cost adsorbent. The effects of various operating parameters on the adsorption process were examined in detail. The results indicate that the maximum removal efficiency of caffeine can reach 94.5% under optimized conditions. The suitability of different adsorption isotherm models was also analyzed, and the Freundlich model showed better fit to the experimental data. Additionally, response surface methodology was employed to analyze the experimental data, demonstrating a good agreement between the experimental and predicted results.
DESALINATION AND WATER TREATMENT
(2022)
Article
Engineering, Chemical
Dmitriy Berillo, Aknazar Arysbek
Summary: This study demonstrates the effective removal of silver nanoparticles (AgNPs) using a chitosan-based cryogel, which has potential applications in agriculture, water treatment, and industrial plants. The adsorbent is economically viable, has high affinity toward metal nanoparticles, is biodegradable and biocompatible, and displays good removal efficiency of nanoparticles.
Article
Chemistry, Physical
Ahmed Shahat, Khadiza Tul Kubra, Adel El-marghany
Summary: A high-potential nanoadsorbent was synthesized and characterized for its efficiency in adsorbing triclosan (TCS) from aqueous solutions. The adsorption equilibrium was found to be influenced by the pH of the solution. The adsorption process followed a chemisorption technique, as evidenced by fitting the adsorption isotherm models to a Langmuir model. The synthesized MCNS adsorbent showed remarkable reusability and renderability, making it suitable for water filtration and industrial wastewater treatment.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Rahmi, Muhammad Iqhrammullah, Ulfa Audina, Husni Husin, Haya Fathana
Summary: A film adsorbent OC/Chi-EDTA was prepared from OPEFB-based charcoal through a simple phase inversion technique, showing advantageous properties for Cd (II) adsorptive removal. The material exhibited high tensile strength, adsorption capacity, and thermal stability, with successful adsorption mechanisms of electrostatic attraction and complexation for Cd (II) uptake.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2021)
Article
Water Resources
Sharon K. K. Pereira, Srinivas Kini, Balakrishna Prabhu, Gautham P. P. Jeppu
Summary: Analytical isotherm models are commonly used for modeling adsorption studies, but most of them do not consider the pH-dependent adsorption. The modified Langmuir-Freundlich (MLF) isotherm model developed by us can simulate pH-dependent adsorption. In this study, the MLF model was extended to other metal ions by considering chromium adsorption datasets on different adsorbents.
APPLIED WATER SCIENCE
(2023)
Article
Chemistry, Physical
Chandrabhan Verma, Akram Alfantazi, M. A. Quraishi
Summary: Carbon dots (CDs) are a new member of the carbon family that has gained substantial attention due to their advantages such as biocompatibility, high quantum yield, low toxicity, and eco-friendliness. Research suggests that CDs derived from materials like citric acid and ammonium citrate show remarkable anticorrosive activity, with spectroscopic techniques being widely used for characterization and study.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Environmental Sciences
Hamid Ramezanipour Penchah, Ahad Ghaemi, Fatemeh Jafari
Summary: In this study, activated carbon and piperazine-modified activated carbon adsorbents were prepared and utilized for CO2 adsorption. The surface modification of activated carbon improved CO2 adsorption capacity, with the highest adsorption achieved at 25 degrees C and 8 bar. Adsorption data were fitted by isotherm and kinetic models, with good agreement found between the Hill isotherm model and Elovich kinetic models. Thermodynamic modeling for modified and unmodified adsorbents showed changes in enthalpy, entropy, and Gibbs free energy for piperazine-modified activated carbon at 25 degrees C and 6 bar.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Polymer Science
Matteo Di Virgilio, Saverio Latorrata, Cinzia Cristiani, Giovanni Dotelli
Summary: The increasing quantity and heterogeneity of waste from electrical and electronic equipment (WEEE) due to rapid technological advancement require innovative methods for recycling and recovery processes. This study focuses on understanding the adsorption and release mechanisms of activated carbon (AC) and its pentaethylenehexamine (PEHA)-modified derivative (MAC) for treating valuable rare earth elements (REEs) derived from WEEE. The experimental data and mathematical modeling suggest that these materials have potential suitability for industrial-level processes.
Article
Engineering, Environmental
Craig Warren Davis, Dominic M. Di Toro
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2015)
Article
Environmental Sciences
Craig Warren Davis, Dominic M. Di Toro
Article
Engineering, Environmental
Kuang Zhu, William A. Arnold, Jonathan Sakkos, Craig Warren Davis, Paige J. Novak
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2018)
Article
Environmental Sciences
L. Camenzuli, C. W. Davis, T. F. Parkerton, D. J. Letinski, J. D. Butler, R. A. Davi, E. J. Febbo, M. Leon Paumen, M. A. Lampi
Article
Chemistry, Applied
Gail E. Bragin, Craig Warren Davis, Ming H. Kung, Barbara A. Kelley, Cary A. Sutherland, Mark A. Lampi
JOURNAL OF SURFACTANTS AND DETERGENTS
(2020)
Review
Environmental Sciences
Angela C. Scott, Warren Zubot, Craig W. Davis, John Brogly
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
Craig Warren Davis, Louise Camenzuli, Aaron D. Redman
Summary: A machine-learning System-Integrated Model (HC-BioSIM) is developed to predict the primary disappearance time of petroleum hydrocarbons in fresh and marine water. This model integrates chemical structure and test system variability, leading to improved predictive performance and accuracy of persistence categorization.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2022)