Article
Environmental Sciences
Abel Riaza-Frutos, Agata Egea-Corbacho, Manuel A. Manzano, Jose Maria Quiroga
Summary: In today's industries, there is a need to degrade non-biodegradable compounds before their discharge into the environment. This study focused on the degradation of Orange II, a widely-used azo-dye. The photo-Fenton process was used to study the degradation under different conditions, and it was observed that homogeneous catalysis provided better results in primary degradation and mineralization compared to heterogeneous catalysis.
Article
Engineering, Environmental
Qiang Zhao, Congcong Zhang, Xiaoqiang Tong, Yunling Zou, Yan Li, Fang Wei
Summary: Fe3O4-NPs/orange-peel (MOP) composite was prepared as a magnetic heterogeneous Fenton-like catalyst, demonstrating high efficiency in degrading organic dye wastewater with excellent catalytic stability and easy separation. The composite holds great promise for low-cost and high-efficiency treatment of organic dye wastewater.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Ling Tan, Xiaoyan Wang, Shaoke Wang, Xiaorui Qin, Linfeng Xiao, Chunling Li, Shuangqing Sun, Songqing Hu
Summary: The degradation performance of Fe-Nb-Cu-Si-B amorphous alloy powders for methyl orange in an ultrasonic Fenton-like process was studied. The effects of pH, H2O2, catalyst dosage, temperature, dye concentration, and ultrasound on the degradation efficiency were investigated. The results show that the amorphous alloy has potential application in the degradation of azo dyes.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Sifani Zavahir, Tasneem Elmakki, Nourhan Ismail, Mona Gulied, Hyunwoong Park, Dong Suk Han
Summary: This study demonstrates the successful degradation of a model contaminant, methyl orange, using a titanium nanotube array as a photocatalyst under simulated solar illumination. The nanotube array was synthesized by anodizing a titanium film in an electrolyte medium. The photocatalyst showed remarkable degradation kinetics and maintained its performance over multiple reaction cycles.
Article
Environmental Sciences
Aditi Trivedi, Swathi Desireddy, Sabumon Pothanamkandathil Chacko
Summary: A mixed microbial consortium adapted from the activated sludge process was capable of simultaneous decolourization and mineralization under denitrifying conditions, even at high methyl orange concentrations. Decolourization process followed first-order kinetics, with better performance observed at alkaline pH levels.
Article
Chemistry, Physical
Abderrazzak Adachi, Faical El Ouadrhiri, Mohammed Kara, Ibtissam El Manssouri, Amine Assouguem, Mikhlid H. Almutairi, Roula Bayram, Hanan R. H. Mohamed, Ilaria Peluso, Noureddine Eloutassi, Amal Lahkimi
Summary: The EF advanced oxidation decolorization of aqueous solutions of methyl orange (MO), a commercial azo reactive textile dye, was investigated in a batch reactor in the presence of two different electrodes. Under the optimal experimental conditions, a maximum discoloration rate of 94.9% was achieved, confirming the superiority of the EF system in terms of discoloration rate.
Article
Environmental Sciences
R. P. Nippes, P. D. Macruz, L. C. A. Molina, M. H. N. O. Scaliante
Summary: The study successfully prepared a solid iron catalyst for efficient degradation of food coloring using the heterogeneous solar-Fenton process. The catalyst was produced through wet ion exchange and characterized using various techniques. Under the experimental conditions, the catalyst showed high efficiency and stability when reacting with natural sunlight, and it could be used for multiple cycles.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Paulina Haller, Ignacio Machado, Julia Torres, Agustina Vila, Nicolas Veiga
Summary: This study aimed to immobilize Fe(III) complexes in molecularly imprinted polymers to produce efficient Fenton-like heterogeneous catalysts for the green oxidative degradation of the methyl orange dye pollutant. Fe(III)-BMPA and Fe(III)-NTP were identified as the best candidates, achieving over 70% MO degradation in 3 hours. The resulting ion-imprinted polymers showed potential as cheap and robust solid matrices for effluent treatment systems.
Article
Environmental Sciences
Xue Wang, Xiurui Liu, Fang Yuan, Buyun Wang, Qi'an Peng
Summary: The selective decolorization of mixed dyestuffs was achieved using a heterogeneous catalyst. Cu/Fe@biochar composites with varying amounts of copper and iron were prepared and showed excellent catalytic performance in degrading methyl orange and methylene blue. The composite with the highest metal component (294.44 mg/g iron and 16.22 mg/g copper) could decolorize 97.35% of methyl orange in 60 minutes and 100% of methylene blue in 10 minutes. The selectivity of the degradation was influenced by competitive adsorption and the phase where the dyestuffs were degraded, and depended on the catalyst's performance.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Chemical
Hassanali Rasouli, Momen Khodabakhshi, Mohammad Ghorbanpour
Summary: This study developed a new photocatalyst for degradation of dyes and prepared silica gel/iron oxide nanocomposites using a solid phase ion-exchange method. The synthesized nanocomposite showed the best decolorization efficiency after 3 hours, and the solid-state ion-exchange method has potential in photocatalyst production.
DESALINATION AND WATER TREATMENT
(2022)
Article
Engineering, Environmental
Farzaneh Mahmoudi, Chang Min Park, Jae-Jin Shim
Summary: In this study, a novel catalyst SFO/TCT-10 was synthesized to address the low Fe(II) regeneration performance in conventional Fenton system. The synthesized catalyst showed excellent efficiency in degrading tetracycline under sono-Fenton process, and the catalytic mechanism and possible degradation pathways were proposed.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Chemistry, Physical
Yingying Li, Yuhang Li, Jinyang Lv, Zhenbo Zhao, Guoying Sun
Summary: In this paper, a new ternary CuO-CeO2/g-C3N4 composite catalyst was synthesized and used to remove methyl orange dye by activating H2O2 under visible light irradiation. The effects of catalyst dosage, H2O2 concentration, pH value, and catalyst reusability were investigated, and a possible reaction mechanism was proposed.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
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
Engineering, Environmental
Pengfei Yan, Haojian Wang, Mingwen Wang, Chengwen Chai, Yaping Ye
Summary: FeS2/MoS2 shows promising prospects for wastewater degradation with high degradation efficiency and a wide applicable pH range.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
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
Engineering, Chemical
Xu Yang, Jieshi Xiao, Jian Huang, Kaixiang Peng
Summary: This study introduces an online convolutional adversarial autoencoder (AAE) model to learn representative industrial process information. By extracting features that reflect diverse information and follow a Gaussian distribution, the model improves the accuracy of fault detection and removes redundant information through a feature selection strategy.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
Article
Engineering, Chemical
Shao-Yang Wu, Meng-Tsun Lai, Chung-Hui Hsu, Kevin C. W. Wu, Yesong Gu
Summary: This study investigated the effectiveness of using Fe-based MOF or MIL-100(Fe) in conjunction with a PEDOT-modified Pt electrode for detecting the synthetic azo dye tartrazine. By modifying the electrode with two different methods, favorable lower reductive potentials, competitive sensitivities, and good repeatability and stability were achieved in all MIL-100(Fe)/PEDOT/Pt electrodes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)