Article
Environmental Sciences
Vinicius Diniz, Gabriela Rath, Susanne Rath, Larissa Sene Araujo, Davi Gasparini Fernandes Cunha
Summary: The study found that the most mesoporous activated carbon showed better drug removal, and in multicomponent experiments, caffeine had the greatest hindrance in adsorption. Multicomponent assays are crucial for evaluating the potential adsorption capacity in real water treatment plants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Weihong Wang, Xinke Wang, Pascale S. J. Lakey, Michael J. Ezell, Manabu Shiraiwa, Barbara J. Finlayson-Pitts
Summary: Emerging contaminants are a growing concern due to their potential impacts on both the environment and human health. In this study, the synergistic effects of nitro, amino, and carbon-carbon double bond groups on gas phase ozonolysis were investigated. The results show that the presence of a nitro group attached to a carbon-carbon double bond lowers the gas phase rate constant, while amino groups have the opposite effect. The study also identifies products with deleterious health effects, emphasizing the importance of considering both the parent compounds and the products in assessing the environmental impacts of emerging contaminants.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Environmental Sciences
Elham Aseman-Bashiz, Hossein Sayyaf
Summary: Nanopyrite particles (NP) were synthesized and used as a novel source of Fe2+ in the electro-activation of ozone and peroxydisulfate for ofloxacin removal. The results showed that the NP/PDS and NP/O-3 processes had good OFX removal efficiency, with a more significant synergistic effect observed in the NP/PDS system.
Article
Environmental Sciences
Yanan Chen, Yunkun Qian, Yijun Shi, Xinyi Wang, Xiao Tan, Dong An
Summary: The enantioselectivity of drug enantiomers during adsorption on microplastics is influenced by environmental factors, including UV light exposure time and natural organic matter concentrations. Research shows that the differences in enantiomeric enrichment between OFL and LEV on PE are promoted with increasing UV light exposure time and NOM concentrations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Pharmacology & Pharmacy
Niaz Hussain, Nisar Hussain Shah, Shahzada Khurram Syed, Muhammad F. Rasool, Naveed Nisar, Abdul Majeed
Summary: The study developed an HPLC-UV method for analyzing ofloxacin in plasma, showing good linearity, recovery rate, and resolution, which can be used for estimating the pharmacokinetics of ofloxacin.
LATIN AMERICAN JOURNAL OF PHARMACY
(2021)
Article
Environmental Sciences
Marcela Paredes-Laverde, Diego F. Montano, Ricardo A. Torres-Palma
Summary: The presence of dyes and pharmaceuticals in natural waters is becoming a global concern. In this study, the potential of montmorillonite (MMT) as an adsorbent for the removal of various dyes and pharmaceuticals from water was evaluated. The adsorption capacity of MMT was found to be influenced by attractive forces between the contaminants and MMT, and adsorption isotherms and kinetics were well described by Langmuir and pseudo-second-order models, respectively. The findings demonstrated that MMT can efficiently remove certain contaminants through electrostatic attractions and hydrogen bonding.
Article
Engineering, Environmental
Lan Huong Nguyen, Xuan Hoan Nguyen, Nam Van Thai, Hoang Nghiem Le, Thu Thao Bui Thi, Kim Trinh Bui Thi, Hung M. Nguyen, Minh Thanh Le, Huu Tap Van, Dau Tran Anh Nguyet
Summary: A heterogeneous catalyst derived from iron-containing waste mineral was used for the mineralization of ofloxacin by ozone/Fenton system. The addition of Fenton reagent into the ozonation system resulted in the highest removal efficiency of ofloxacin due to the synergistic effect of ozone and Fenton reagent. The catalyst showed good reusability and stability, and the treatment process improved the biodegradability of real pharmaceutical wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Dongwon Cha, Sanghun Park, Min Sik Kim, Taewan Kim, Seok Won Hong, Kyung Hwa Cho, Changha Lee
Summary: This study demonstrates machine learning models based on the random forest algorithm for predicting the abatement of micropollutants during ozonation processes. The models use input variables such as pH, alkalinity, dissolved organic carbon concentration, and FEEM data, with high-resolution FEEM data showing higher prediction accuracy. Utilizing organic matter characteristics quantified by FEEM can improve the accuracy of the model in predicting oxidant exposures.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Yanghan Chen, Qiuye Jin, Zhaomin Tang
Summary: This study investigated the degradation performance of ofloxacin (OFX) using potassium ferrate (Fe(VI)). It was found that the presence of Fe3+ and NH4+ significantly promoted the degradation of OFX by Fe(IV), while humic acid (HA) inhibited it. Under specific conditions, Fe(VI) efficiently degraded OFX, and two possible degradation pathways were proposed.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Ifeoluwa P. Oyekunle, Islamiyat A. Ojelade, Jamal A. Oyegoke, Damilola C. Petinrin, Samuel O. Oyekunle, Mariam Olutusin, Comfort O. Adegbenro
Summary: This study investigates the accumulation of the antibiotic ofloxacin in aqueous matrix and proposes mitigation strategies. Various adsorption mechanisms and suitable adsorption models were identified, along with effective adsorbents and suggestions for experimental design.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Pengfei Jiao, Jiamiao Liu, Zhaoqi Wang, Maripat Ali, Luying Gu, Shanshan Gao
Summary: The mass-transfer process of salicylic acid on hyper-cross-linked resin XDA-200 was studied experimentally and theoretically. The adsorption of undissociated salicylic acid on the resin was found to be favorable, and a pH-dependent adsorption isotherm model was established to fit the experimental data. Surface diffusion was identified as the main mass-transfer mode for salicylic acid in resin particles, with coadsorption of salicylate anions and Na+. A modified surface diffusion model considering coadsorption was proposed and validated with concentration decay curves at different pH values and feed concentrations. Furthermore, a pH-dependent dynamic adsorption and elution process model considering multiple factors was established and successfully predicted the breakthrough and elution curves. This research has reference significance for optimizing the separation process of salicylic acid and its analogues.
Article
Chemistry, Multidisciplinary
Pengfei Jiao, Jiamiao Liu, Zhaoqi Wang, Maripat Ali, Luying Gu, Shanshan Gao
Summary: The mass-transfer process of salicylic acid on hyper-cross-linked resin XDA200 was studied experimentally and theoretically. The research found that undissociated salicylic acid was the most favorable form for adsorption on the resin. A pH-dependent adsorption isotherm model was established and surface diffusion was identified as the main mass-transfer mode. A modified model considering coadsorption was proposed and proved to fit well with the experimental data. Additionally, a pH-dependent dynamic adsorption and elution process model considering axial well as coadsorption of salicylate anions and Na+ was established, which accurately predicted the breakthrough and elution curves at different feed concentrations.
Article
Chemistry, Multidisciplinary
Phuong Thi Thanh Nguyen, Hieu Trung Nguyen, Uyen Nhat Phuoc Tran, Ha Manh Bui
Summary: Hospital wastewater in Vietnam was found to be contaminated with at least one of the antibiotics, with ciprofloxacin, cefuroxime, COD, and ammonia being almost eliminated under optimal conditions. The removal efficiency of antibiotics by the cold plasma technique was affected by factors such as pH, interelectrode distance, applied voltage, and reaction time, with the most significant removal occurring in the first 5 minutes. The decomposition of ciprofloxacin and cefuroxime followed first-order reaction kinetics, while ofloxacin and amoxicillin decomposition followed third-order kinetics.
JOURNAL OF CHEMISTRY
(2021)
Article
Environmental Sciences
M. Ekblad, R. Juarez, P. Falas, K. Bester, M. Hagman, M. Cimbritz
Summary: The study found that short hydraulic retention time was sufficient for organic micropollutant removal, and higher removal efficiency was achieved after on-site addition of aluminum chloride.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Shi-Qi Tian, Jing-Yao Qi, Yun-Peng Wang, Yu-Lei Liu, Lu Wang, Jun Ma
Summary: Biochar loaded with manganese and iron showed excellent catalytic ozonation activity, effectively removing atrazine with hydroxyl radicals as the main oxidant. The enhanced adsorption and decomposition of O-3 on the loaded biochar led to improved degradation pathways of atrazine, reducing toxicity of oxidation products significantly. This research indicates the great potential of Mn-loaded and Fe-loaded biochar for heterogeneous catalytic ozonation in water pollution treatment.
Article
Engineering, Chemical
A. M. Chavez, A. Rey, J. Lopez, P. M. Alvarez, F. J. Beltran
Summary: The synthesis, characterization, stability, and application of the Fe-based MOF MIL-100(Fe) were studied, showing low stability under conditions with phosphates and high oxidant doses plus radiation. High catalytic activity was achieved in some advanced oxidation processes, but concerns about stability due to TMA and iron leaching were raised.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jorge Lopez, Ana M. Chavez, Ana Rey, Pedro M. Alvarez
Summary: MIL-53(Fe) has been synthesized and studied for stability and photocatalytic activity in water. The results show that it exhibits good stability under acidic conditions but undergoes hydrolysis under alkaline conditions. In the presence of oxidants, it shows enhanced removal efficiency for pollutants in water.
Review
Chemistry, Physical
Fernando J. Beltran, Ana Rey, Olga Gimeno
Summary: The study reviewed the application of catalytic ozonation processes in drinking water treatment for the removal of humic substances and disinfection byproducts. Besides presenting a brief history of disinfectant use and alternative oxidants, it focused on conventional AOPs recommended for treating disinfection byproducts, along with discussing the research achievements on the application of catalytic ozonation processes.
Article
Engineering, Chemical
Rafael R. Solis, Ana M. Chavez, Olga Monago-Marana, Arsenio Munoz de la Pena, Fernando J. Beltran
Summary: The combination of ozone and solar radiation has been proven to be an effective technology for the removal of harmful contaminants in water, particularly in the case of cefuroxime. Research showed that simultaneous application of ozone and solar radiation enhanced the degradation of cefuroxime, with hydroxyl radical playing a significant role in the process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Manuel Figueredo, Eva M. Rodriguez, Javier Rivas, Fernando J. Beltran
Summary: Ozonation and photocatalytic oxidation show synergy in water treatment, with potential for photocatalytic ozonation application. pH, alkalinity, and water matrix composition can affect the performance of these systems, especially when dealing with organic pollutants. The study demonstrates the importance of considering water quality factors when applying photocatalytic ozonation for pollutant removal.
Article
Chemistry, Physical
Fernando J. Beltran, Javier Rivas, Juan-Fernando Garcia-Araya
Summary: This study addressed the challenge of establishing the rate of photon absorption in external photoreactors by adapting SFM equations developed for central lamp photoreactors. The results showed slight differences from those obtained using the Monte Carlo method. Additionally, intrinsic rate constants and scavenging factors for the photocatalytic oxidation of contaminant compounds were determined based on the validated photon absorption rate.
Article
Chemistry, Physical
Jorge Lopez, Ana Rey, Juan F. Garcia-Araya, Pedro M. Alvarez
Summary: The article presents a novel synthesis method for the preparation of magnetite-based catalysts under a green philosophy. The method involves the use of terephthalic acid to drive the synthesis route and recovery of excess reactants. The synthesized catalysts showed typical crystalline phase, moderate surface area, and magnetic properties. They also exhibited excellent catalytic performance in the wet peroxide oxidation of an aqueous solution under simulated solar radiation.
Review
Environmental Sciences
Zilong Song, Jingyi Sun, Zhenbei Wang, Jun Ma, Yongze Liu, Francisco Javier Rivas, Fernando Juan Beltran, Wei Chu, Didier Robert, Zhonglin Chen, Bingbing Xu, Fei Qi, Jolanta Kumirska, Ewa Maria Siedlecka, Amir Ikhlaq
Summary: This review provides detailed insights into the mechanisms of catalytic ozonation by two-dimensional layered carbon-based materials (2D-LCMs) for degrading toxic refractory organics in aqueous solutions. It emphasizes the importance of the migration and capture of active electrons in catalytic ozonation reactions and discusses the structure-activity relationships between various active sites and the evolution of reactive oxygen species (ROS). The review also highlights the significance of studying the structural stability of 2D-LCMs-based catalytic ozonation and calls for further research in this area.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Physical
Manuel Checa, Vicente Montes, Javier Rivas, Fernando J. Beltran
Summary: An easily recoverable solid photo-catalyst, FeGOTi, was synthesized and used for catalytic ozonation to degrade primidone. The FeGOTi catalyst exhibited high efficiency with its large surface area, appropriate band gap, and main crystalline forms. Different ozonation processes showed varying performance in terms of removal and mineralization of primidone.
Editorial Material
Chemistry, Physical
Juan F. Garcia-Araya, Fernando J. Beltran
Article
Chemistry, Multidisciplinary
F. J. Beltran, F. J. Rivas
Summary: A theoretical kinetic model of the ozonation process involving direct and free radical reactions in the film and water bulk is developed in this study. The results show that the direct reaction in the film plays an important role in the removal rate of compounds, especially in the fast-moderate kinetic regimes of ozone absorption. The study also reveals that the formation of hydrogen peroxide and its reaction with ozone leads to the formation of free radicals.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Engineering, Environmental
Manuel Figueredo, Eva M. Rodriguez, Eduardo M. Cordero, Fernando J. Beltran
Summary: This study investigated photocatalytic oxidation/ozonation of pharmaceuticals in secondary effluent using TiO2 supported on ceramic foams. The results showed that photocatalytic ozonation was the most effective method for COD removal, while the presence of contaminants favored their degradation and mineralization.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Edgar E. Hernandez-Coronado, Edgar J. Ruiz-Ruiz, Laura Hinojosa-Reyes, Fernando J. Beltran, Jorge Lopez-Gallego, Miguel A. Gracia-Pinilla, Minerva Villanueva-Rodriguez
Summary: This study evaluated the photocatalytic degradation of the antibiotic cefuroxime (CFX) using heterogeneous photo-Fenton with alpha-Fe2O3-TiO2 as a catalyst under simulated solar radiation. The incorporation of Fe2O3 into TiO2 increased surface area, decreased Eg value, and improved the degradation efficiency of CFX. The stability of alpha-Fe2O3-TiO2 was demonstrated during five consecutive cycles in the CFX degradation, indicating its potential as a suitable catalyst for organic contaminants elimination by heterogeneous photo-Fenton.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Juan C. Aldana, Juan L. Acero, Pedro M. Alvarez
Summary: The table olive industry produces a large amount of wastewater (TOPW) that poses environmental risks. Various treatment methods were compared, and it was found that reverse osmosis (RO) and nanofiltration (NF) showed good results in terms of removing pollutants from the wastewater. Pre-treatments such as microfiltration also improved the performance of the membranes in NF treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)