Article
Environmental Sciences
Yang Hu, Fuzhi Yu, Zhongteng Bai, Yanqiu Wang, Huan Zhang, Xinyu Gao, Yixian Wang, Xiao Li
Summary: Novel iron-loaded needle coke spherical electrodes were fabricated using the sintering method for the first time, and a three-dimensional electro-Fenton system was constructed for treating coking wastewater. Optimal conditions for electrode preparation were determined through experiments, and response surface methodology was applied to optimize the wastewater treatment process.
Article
Engineering, Environmental
Zilong Zhao, Yatao Ren, Shuyu Qi, Zigong Ning, Xing Wang, Wenyi Dong, Hongjie Wang
Summary: In this study, Fe and N co-doped biochar derived from rice husk (Fe-NRHBC) was utilized as catalytic particle electrodes in a three-dimensional electro-Fenton (3D-EF) system for the decomplexation and removal of Ni-EDTA. The 3D-EF process demonstrated rapid removal of Ni-EDTA within the initial minute and high stability and catalytic capacity after three consecutive cycles. The surface-bound O2·- radicals and 1O2 generated by the Fe-N-RHBC catalytic particle electrode played a crucial role in the decomplexation and removal of Ni-EDTA.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Nannan Wang, Liangwei Li, Wenhui Zou, Peng Wang
Summary: In this study, activated carbon (CSAC) was produced from corn straw for the treatment of ofloxacin-simulated wastewater (OSW) using a particle electrode with Fenton-like catalytic performance (Fe/CFA-CSAC). The Fe/CFA-CSAC EF process effectively removed COD, TOC, BOD5/COD, and reduced toxic inhibition rate in the wastewater. The prepared material costs $219.9/ton and the treatment cost for OSW is $1.71/ton.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Environmental Sciences
Juan Casado
Summary: Advanced oxidation processes (AOPs) such as Fenton's reagent have drawbacks, but Electro-Fenton (EF) and heterogeneous Electro-Fenton (HEF) using mineral catalysts have gained attention. Mineral catalysts have advantages in efficiency, stability, affordability, and environmental friendliness, but challenges include agglomeration of nanoparticles and complex preparation techniques. The optimal pH range and dosage of catalysts and the performance of different catalysts are discussed. Further development is needed, considering the environmental impact. The article also emphasizes the need to achieve environmentally friendly and cost-effective results using real wastewaters on a pilot scale.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Jinxin Li, Dan Zhong, Feiyu Li, Kefei Li, Wencheng Ma, Jun Ma, Jingna Zhang, Aoshuang Sun
Summary: A bifunctional electro-Fenton (EF) cathode was synthesized for the efficient removal of coal pyrolysis wastewater (CPW). This cathode demonstrated a high mineralization efficiency of dimethylphenol (DMP) and the detectable ROS in the hetero-EF system for DMP removal were identified. In addition, the cathode exhibited good recyclability and showed potential for actual CPW application. Overall, this work presents a novel and stable cathode for the efficient removal of refractory CPW in the hetero-EF system.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Caiping Lu, Junchi Gu, Guangtao Wei, Jinshuai Ba, Linye Zhang, Zhongmin Li, Ruinan Pei, Jiayan Li, Jiqing Wei
Summary: In this study, CuO-doped red mud (CuO/URM) was used as a particle electrode in a three-dimensional electroFenton (3D/EF) system for the degradation of ciprofloxacin (CIP). The optimal operating conditions were determined, and the effect of inorganic anions on CIP degradation was investigated. The degradation intermediates and pathway of CIP in the 3D/EF system were proposed. Compared to the two-dimensional electrochemical system, the 3D/EF system showed superior removal capability and energy utilization efficiency. The stability of the CuO/URM electrodes was also confirmed. Therefore, the 3D/EF system catalyzed by CuO/URM particle electrodes is a reliable technology for the disposal of CIP wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Review
Chemistry, Physical
Laura Cipriano Crapina, Liva Dzene, Jocelyne Brendle, Florence Fourcade, Abdeltif Amrane, Lionel Limousy
Summary: Advanced oxidation processes, particularly the heterogeneous electro-Fenton (HEF) process, show promise in removing persistent organic pollutants from industrial wastewaters. Clay-modified electrodes have emerged as effective catalysts in this process, particularly due to their ability to facilitate electron transfer without the use of mediators. The milestone achievement of electron transfer between Fe(III) and Fe(II) without the need for mediators is highlighted as a significant advancement in this field.
Article
Environmental Sciences
Huiji Xiao, Yongjie Hao, Jingli Wu, Xianzhe Meng, Fei Feng, Fengqi Xu, Siyi Luo, Bo Jiang
Summary: This study provides a deep insight into the 3D electrocatalytic oxidation technology and helps to develop high-efficiency and cost-efficient 3D technologies for industrial application.
Article
Environmental Sciences
Jun Chen, Boding Zhang, Bingxing Wang, Wenlong Zhang, Jichao Wang, Chengxing Cui, Songlin Wang
Summary: Wastewater containing quinoline is a common pollutant that poses a threat to human health. In this study, a particle electrode system was developed for efficient degradation of quinoline, and the degradation mechanism was elucidated through experiments and theoretical calculations.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Fang Guo, Yaoyin Lou, Qun Yan, Jianglei Xiong, Jiahao Luo, Chikang Shen, Dimitris V. Vayenas
Summary: In this study, a Ni-Fe (oxides) modified three-dimension (3D) particle electrode was used in the electro-Fenton system for the efficient removal of bio-refractory organic pollutants in the electronic industry wastewater. The COD removal efficiency reached about 80%, which was 20% higher than that in the 2D/EF system. The most abundant and representative compound identified in the analysis was mono-2-ethylhexyl phthalate (MEHP). The study also proposed a possible degradation pathway of MEHP in the 3D/EF system. This research provides a new strategy for the elimination of organic pollutants in electronic industry wastewater using bimetal doped biochar composites.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Xinyu Gao, Huan Zhang, Yanqiu Wang, Haiyang Wang, Yin Tang, Yang Hu, Yanli Lv, Jinfeng Bai
Summary: A novel electro-Fenton cathode was prepared from needle coke loaded with ferrous ions (Fe/NC/Ti) for treating coking wastewater. The preparation conditions and factors affecting the treatment were investigated. The Fe/NC/Ti cathode showed excellent catalytic effect with high removal rate of chemical oxygen demand (COD) and reduction of UV254 under optimal conditions. It also demonstrated good stability and efficient degradation of aromatic compounds in coking wastewater. The scale-up experiment confirmed its low energy consumption and high COD removal efficiency, making it a potential solution for coking wastewater degradation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Ayse Kuleyin, Aysem Gok, Feryal Akbal
Summary: This study investigated the effectiveness of electro-Fenton (EF) technology for advanced treatment of biologically treated textile wastewater using graphite electrodes. The EF process significantly reduced color, COD, and TOC content of the wastewater under optimal operating conditions. In continuous system, high removal efficiencies were achieved for color, COD, and TOC, demonstrating the promising potential of EF process with graphite electrodes for improving wastewater quality.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Chemistry, Multidisciplinary
Zining Wang, Mingyue Liu, Fan Xiao, Georgeta Postole, Hongying Zhao, Guohua Zhao
Summary: Electrochemical advanced oxidation processes (EAOPs), particularly the heterogeneous electro-Fenton (EF) process, with in-situ formation of hydrogen peroxide (H2O2), have shown great potential for the effective and environmentally friendly treatment of refractory organic pollutants. This article discusses the surface catalytic mechanisms for H2O2 activation in the heterogeneous EF process and summarizes the required features for H2O2 formation via selective oxygen reduction reaction (ORR) with carbonaceous electrodes. It also provides an overview of solid Fenton catalysts and integrated functional cathodes used in heterogeneous EF for wastewater treatment, along with a brief discussion on their catalytic activity and stability under different experimental conditions. Additionally, the application of heterogeneous EF process in the remediation of emerging contaminants is highlighted, while emphasizing the challenges and future prospects related to catalytic fall-off and multi-step/complex techniques for water purification.
CHINESE CHEMICAL LETTERS
(2022)
Article
Engineering, Environmental
Chenyang Zhou, Xueer Peng, Xuelian Li, Kai Qi, Lili Gao
Summary: A stable copper iron oxide/kaolin catalytic particle electrode was synthesized via a facile sol-gel method and applied in three-dimensional/heterogeneous electronFenton (3D/HEF) for the removal of Orange G (OG). Under optimized conditions, the removal efficiency of OG and total organic carbon (TOC) reached 99.48% and 58.13% respectively. This study is of great significance for the design and synthesis of durable composite catalytic particle electrodes that can effectively remove dyes in the 3D/HEF system.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
P. Nidheesh, Bibhudutta Behera, D. Syam Babu, Jaimy Scaria, M. Suresh Kumar
Summary: The efficiency of combined electro-Fenton (EF) and electrocoagulation (EC) processes for treating mixed industrial wastewater was investigated in this study. The use of alkali modified laterite soil as a heterogeneous EF catalyst resulted in superior performance compared to raw laterite soil. By combining the EF process followed by the EC process, a high COD removal rate of 85.27% was achieved after 2 hours of treatment. The EF + EC strategy was found to be better than the EC + EF strategy in terms of nullifying the neutralization requirement, achieving high mineralization efficiency, enhancing biodegradability, and reducing sludge generation.
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)
