Article
Materials Science, Multidisciplinary
Negin Iranparast Poshtiri, Ahmad Dadvand Koohi, Azadeh Ebrahimian Pirbazari, Fatemeh Esmaeili Khalil Saraei
Summary: In this study, magnetite fish scales and tea waste were used as adsorbents for Cu(II) cations and then applied as photo-Fenton catalysts to degrade methyl orange. The effects of different factors on the degradation efficiency were investigated and the catalytic action was attributed to the formation of hydroxyl radicals. The results showed that Cu-MFS and Cu-MTW exhibited high degradation efficiency and good stability.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Chongchong Liu, Peifang Wang, Peilin Huang, Zhimin Yang, Gang Zhou
Summary: This study utilizes aliovalent redox pairs and a built-in electric field to induce photo-excited electrons to achieve Fe(III) reduction, resulting in enhanced photoelectric properties and accelerated charge transfer. Oxygen-deficient CeO2 particles anchored on metal-organic frameworks (MIL-88A) form a heterojunction, leading to the degradation of 95.76% oxytetracycline in the photo-Fenton reaction and maintaining a high mineralization rate (75.33%) after 4 cyclic tests.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Environmental
Jing Hang, Xiao-Hong Yi, Chong-Chen Wang, Huifen Fu, Peng Wang, Yijiang Zhao, Navid B. Saleh
Summary: The study demonstrates the facile synthesis of magnetic Fe3S4 from MIL-100(Fe) and thioacetamide under hydrothermal conditions, which exhibits excellent oxidative degradation performance towards sulfamethoxazole (SMX) in the photo-Fenton process under both UV and visible light. Fe3S4 also shows high potential for total organic carbon (TOC) removal efficiency and recyclability in water treatment applications.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Chenrui Liu, Yun Liu, Zhi Dang, Shuai Zeng, Chengcheng Li
Summary: The novel core-shell Fe3O4@B-rGO heterogeneous photo-Fenton catalyst exhibited enhanced degradation efficiency for Bisphenol A compared to Fe3O4 and Fe3O4@rGO. The presence of doped boron at 9.3% concentration resulted in the optimum catalytic property, with significantly increased degradation rate constant. The mechanism analysis confirmed the role of center dot OH, O-2(center dot-) and h(+) in the redox reactions, showing promising potential for organic compound degradation in wastewater treatment.
APPLIED SURFACE SCIENCE
(2021)
Article
Biotechnology & Applied Microbiology
Ho Gia Quynh, Huynh Van Thanh, Nguyen Thi Truc Phuong, Nguyen Phuc Thanh Duy, Lam Hoa Hung, Nguyen Van Dung, Ngo Tran Hoang Duong, Nguyen Quang Long
Summary: A novel Fe3O4 catalyst was synthesized and applied for the degradation of methylene blue dye. The catalyst was characterized using various analytical methods, and its efficiency was investigated under different parameters. The catalyst showed a high removal efficiency of nearly 100% under certain experimental conditions. Furthermore, the catalyst demonstrated good stability and could be a potential option for wastewater treatment. The reaction kinetics followed the Langmuir-Hinshelwood model for heterogeneous catalytic reactions.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Engineering, Chemical
Chenglong Wang, Xiaowen Kong, Zhixin Yu, Xumei Tao, Liang Huang, Shuyong Shang
Summary: A type-II heterojunction photo-Fenton catalyst g-C3N4/Fe-MOFs was synthesized using waste PET by dielectric barrier discharge (DBD) plasma. The catalyst showed enhanced photo-Fenton catalytic performance and could be used for the degradation of antibiotic wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Max L. Bols, Julien Devos, Hannah M. Rhoda, Dieter Plessers, Edward Solomon, Robert A. Schoonheydt, Bert F. Sels, Michiel Dusselier
Summary: This study presents a method for preparing highly active alpha-Fe(II) sites by introducing Fe(III) during hydrothermal synthesis and treating appropriately. The effect of iron on zeolite crystallization was investigated, and intermediate iron species were tracked using various spectroscopy techniques.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Environmental Sciences
Xi Li, Xiao Zhang, Shiwen Wang, Peng Yu, Yanhua Xu, Yongjun Sun
Summary: By synthesizing an Fe/SCN catalyst, electron-hole recombination can be suppressed and electron transfer can be enhanced, achieving efficient degradation of tetracycline. This study provides a new perspective for the design of metal-doped heterogeneous Fenton catalysts for the efficient degradation of antibiotic contaminants in water.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Physical
Jesus Tadeo Hernandez-Olono, Antonia Infantes-Molina, Diana Vargas-Hernandez, Diana Gabriela Dominguez-Talamantes, Enrique Rodriguez-Castellon, Jose Ronaldo Herrera-Urbina, Judith Celina Tanori-Cordova
Summary: The activity of heterogeneous photo-Fenton catalysts based on iron supported on commercial alumina for the degradation of dyes under UV irradiation was studied. The results showed a higher degradation rate compared to heterogeneous photocatalysts, with hydroxyl radicals playing a major role in the photodegradation process.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Environmental Sciences
Kun Lin, Shahzad Afzal, Liheng Xu, Tao Ding, Feng Li, Ming Zhang
Summary: This study synthesized a Fe-containing red mud biochar (RMBC) as a photo-Fenton catalyst for degrading acid orange 7 (AO7). Results showed that RMBC had excellent degradation performance with a decolorization efficiency of nearly 100% and a mineralization efficiency of 87% under visible light irradiation. The study also revealed the reaction mechanism of RMBC, including the activation of H2O2 by Fe2+ provided by RMBC and the production of more reactive oxygen species (ROS) for AO7 degradation under light irradiation.
ENVIRONMENTAL POLLUTION
(2023)
Article
Chemistry, Physical
Sabarish Radoor, Jasila Karayil, Aswathy Jayakumar, Jyotishkumar Parameswaranpillai, Suchart Siengchin
Summary: Mesoporous ZSM-5 zeolite has high adsorption capacity and stable regeneration ability, showing potential as an efficient adsorbent for organic contaminants. Its porous structure can be synthesized using cellulose, and it exhibits high removal efficiency for dyes like methyl orange.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Environmental Sciences
Xu Liu, Hui-Lai Liu, Kang-Ping Cui, Zheng-Liang Dai, Bei Wang, Xing Chen
Summary: In this study, heterogeneous photo-Fenton catalysts were prepared using sludge generated in dyeing wastewater through a simple pyrolysis method. FeCN-300 showed the highest degradation efficiency and stability, indicating its great potential for practical applications.
Article
Chemistry, Inorganic & Nuclear
Dongao Xie, Changxin Tang, Dan Li, Jiren Yuan, Feigao Xu
Summary: In this study, FeOCl/WS2 composites with a visible light response were synthesized and their catalytic activity for acid orange II (AO-II) degradation was investigated. The results showed that when the weight ratio of FeOCl and WS2 was 1:2, the removal efficiency of AO-II by FeOCl/WS2 was 5.3 and 35.6 times higher than that of pure FeOCl and pure WS2, respectively. The degradation rate of AO-II by the F1W2 composite catalysts can reach 93.4%.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Engineering, Environmental
Jieru Guo, Ge Song, Minghua Zhou
Summary: In this study, highly dispersed FeN-CNTs catalysts were synthesized and applied in Hetero-EF process, which significantly improved the removal of pollutants under a wide pH range. FeN-CNTs/Hetero-EF achieved efficient degradation of CBZ at low current density and catalyst dosage.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Xiaobiao Zhu, Hao Li, Xiaohan Shang, Tiefei He
Summary: In this study, Fe-Cu binary oxide loaded on zeolite (Fe/Cu/zeolite) was used as a heterogeneous Fenton catalyst for the catalytic degradation of carbamazepine (CBZ) at near-neutral pH. The Fe/Cu/zeolite catalyst exhibited excellent performance in degrading CBZ, achieving complete degradation at initial pH values ranging from 3 to 7 and maintaining a removal efficiency above 74% even at pH near 10. After repeated use, the Fe/Cu/zeolite catalyst still showed over 95% removal efficiency of CBZ. The main active oxidants were identified as hydroxyl radicals (•OH) based on quenching experiments and ESR testing. XPS analysis revealed that the high catalytic efficiency was attributed to the synergistic effect of Fe(III)/Fe(II) and Cu(II)/Cu(I) redox cycles. Therefore, this catalyst can be effectively used for the degradation of organic pollutants in heterogeneous Fenton systems.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Claudio Rocha, M. A. Soria, Luis M. Madeira
Summary: This study assessed the benefits of different hybrid multifunctional reactors for H2 production from olive oil mill wastewater, finding that the SEMR showed the highest enhancement in H2 yield while reducing pollution load.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
A. Catarina Faria, R. Trujillano, V. Rives, C. V. Miguel, A. E. Rodrigues, Luis M. Madeira
Summary: This study aims to find a CO2 HT-based sorbent with promising behavior in terms of sorption capacity, sorption kinetics, and cyclic stability during continuous sorption/desorption cycles. The best performance was observed for CHT doped with 9.4 wt% of Cs. A study on the cyclic stability of this material was conducted, and a kinetic model predicting the loss of sorption capacity with cycles was successfully developed.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Claudio Rocha, Miguel Angel Soria, Luis M. Madeira
Summary: Olive oil mill wastewater (OMW) is a polluting stream derived from the production of olive oil, and its treatment and valorization are of great importance. Steam reforming technology is considered an effective treatment method that can reduce pollutant load in the wastewater and produce renewable energy.
Article
Engineering, Environmental
A. Rita, A. L. Monteiro, R. M. Albuquerque, M. Santos, J. C. Ribeiro, L. M. Madeira, S. Sanches
Summary: Spent caustic discharges contribute to increased oil and grease content in refinery wastewater, leading to higher treatment costs; a case study on Sines refinery found that processing high kerosene cut acid crude oil may increase effluent management cost by up to 3 euro/ton of processed crude oil. Spent caustic O&G effluents typically consist of organic contaminants with low molecular weight, aromatic and polar arrangements like phenolic groups and naphthenic acids, highlighting the importance of identifying suitable technologies for treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Claudio Rocha, M. A. Soria, Luis M. Madeira
Summary: The study investigated the steam reforming process of olive oil mill wastewater (OMW) to reduce environmental damage and economically valorize the waste. Ni-Ru/SiO2 catalyst exhibited high catalytic performance and stability when tested with synthetic OMW effluent.
Article
Biochemistry & Molecular Biology
Ana Isabel Rita, Ana Rita Nabais, Luisa A. Neves, Rosa Huertas, Maria Santos, Luis M. Madeira, Sandra Sanches
Summary: The treatment of spent caustic effluents is challenging due to their high toxicity and extreme pH. This study evaluated the potential of nanofiltration membranes for treating spent caustic, using both polymeric and ceramic membranes. The results showed that while the polymeric membrane performed well initially, its lifespan was significantly reduced after contact with the spent caustic. Surprisingly, the ceramic membrane also exhibited poor resistance to the spent caustic, with a loss of retention capacity within one hour. These findings highlight the aggressive nature of spent caustic, even for ceramic membranes.
Article
Environmental Sciences
Joao P. F. Venancio, Sara Ribeirinho-Soares, Luisa C. Lopes, Luis M. Madeira, Olga C. Nunes, Carmen S. D. Rodrigues
Summary: In this study, a combination of coagulation/flocculation and Fenton processes was used for tertiary treatment of urban wastewater. The results showed that the best removals of turbidity and enterobacteria were achieved with a coagulant dosage of 120 mg/L and the natural pH of the effluent. The treated water met the strictest limit for E. coli, but had a high relative abundance of potentially hazardous bacteria, emphasizing the need for microbiological characterization before reuse.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Alejandro Jimenez, Raquel Trujillano, Vicente Rives, M. A. Soria, Lufs M. Madeira, Miguel Angel Vicente
Summary: Potentially-CO2 adsorbing solids were prepared by calcination of CaAlFe hydrocalumites at 400 and 750 degrees C. The obtained solids were characterized using different techniques, and the CO2 sorption capacity was evaluated under different conditions. The presence of Fe3+ influenced the crystalline phases and the maximum CO2 sorption capacity was achieved when Fe3+ accounted for 40 mol % of the trivalent positions. The steam presence enhanced the CO2 capture during multiple sorption-desorption cycles.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
A. Catarina Faria, C. V. Miguel, Alexandre F. P. Ferreira, A. E. Rodrigues, Luis M. Madeira
Summary: In this study, nickel-substituted hydrotalcites promoted with cesium were synthesized and their dual-function ability as a high-temperature CO2 adsorbent and methanation catalyst was evaluated. It was found that materials impregnated using the direct impregnation method had a higher number of basic sites, which facilitated greater CO2 sorption. However, these materials exhibited lower selectivity towards methane, resulting in a higher CO formation. Therefore, materials prepared using the powder impregnation method were chosen for further investigation in a parametric study.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Joao Carvalho, Anabela Nogueira, Sergio Castro-Silva, Claudio Rocha, Luis M. Madeira
Summary: Olive oil production leads to environmental damage due to the spreading of pollutant effluents. To solve this problem, the steam reforming (OMWWSR) reaction was studied. Various parameters and reactor configurations were evaluated, with the autothermal reactor (ATR) and sorption-enhanced reactor (SER) showing the best results in terms of H2 production and energy consumption. Economic analysis indicated that the ATR configuration achieved a net present value (NPV) range of 7.2-9.2 Meuro and payback times (PB) of 3-2 years, while the SER configuration had an NPV range of 4.7-12.2 Meuro and PB of 5-2 years.
Article
Environmental Sciences
Carmen S. D. Rodrigues, Sofia N. A. Aziz, M. F. R. Pereira, O. S. G. P. Soares, Luis M. Madeira
Summary: The removal of p-nitrophenol (PNP) from wastewater was evaluated using different carbon materials and their nitrogen-doped counterparts in the activated persulfate process. The study found that the specific surface area of carbon materials influenced the adsorption process, while the mesoporous area influenced the activation process. Nitrogen groups on the surface of the samples accelerated the degradation and mineralization of PNP. The stability of the nitrogen-doped carbon materials was evaluated, and the Fe/XGM sample showed stable performance without leaching of iron. The activated persulfate process achieved complete PNP oxidation and TOC removal of around 96%, making it more attractive than the Fenton method.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Biochemistry & Molecular Biology
Matilde Albano, Luis M. Madeira, Carlos V. Miguel
Summary: Biogas is a valuable renewable energy source that can help reduce greenhouse gas emissions. Through the simulation of membrane reactors, the reforming process of biogas was studied, and it was found that the reaction temperature, pressure, and biogas composition have an impact on hydrogen production.
Article
Environmental Sciences
Mario R. C. Calaixo, Sara Ribeirinho-Soares, Luis M. Madeira, Olga C. Nunes, Carmen S. D. Rodrigues
Summary: This study focuses on the treatment of secondary urban wastewater to improve the effluent quality and reduce pathogenic microorganisms for safe reuse. Catalyst-free persulfate activation by radiation-based oxidation was applied as a treatment technology, and the potential beneficial role of bacterial competition in controlling the regrowth of harmful microorganisms was evaluated. The results showed that the treated wastewater diluted with 50% river water complied with the legislated limits for reuse.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Engineering, Chemical
Joel Silva, Claudio Rocha, M. A. Soria, Luis M. Madeira
Summary: This review compares several Ni-based catalysts for the steam reforming of ethanol, methanol, and other oxygenates. Ni-based catalysts have been extensively studied due to their high activity and low cost. The study aims to assess the catalytic activity and stability of these catalysts and identify the most suitable preparation methods for their synthesis.
