Article
Engineering, Environmental
Limin Duan, Huihao Jiang, Wenhao Wu, Daohui Lin, Kun Yang
Summary: Introducing crystal defects into iron-based metal-organic frameworks (Fe-MOFs) is a promising strategy to enhance Fenton-like performance. However, developing a facile and effective strategy to construct defective Fe-MOFs as highly efficient Fenton-like catalysts is still challenging. In this study, MIL-100(Fe) (Def-MIL-100 (Fe)) with missing ligand defects was synthesized by a simple heterogeneous reaction, and it exhibited significantly higher Fenton-like activity compared to the perfect MIL-100(Fe). The missing ligand defects played a key role in promoting fast H2O2 adsorption, accelerating electron transfer, and improving OH generation and utilization efficiency.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Shenghui Xie, Jiaxin Su, Jianxin Zhao, Haipeng Yang, Haixia Qian
Summary: This study investigates the improved catalytic activity of Fe3O4-decorated glassy zero-valent iron (GZVI) through a low-cost ball milling technique. The addition of 10% Fe3O4 to GZVI resulted in the best surface morphology and highest catalytic efficiency. The Fe3O4/GZVI catalyst exhibited excellent stability and reusability, achieving a 97.37% degradation of p-nitrophenol within 15 minutes. The formation of a galvanic cell between Fe3O4 and GZVI played a crucial role in promoting electron transfer and hydroxyl radical generation, thereby enhancing the pollutant degradation process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Chemical
Xianke Sun, Yanxin Qin, Wen Zhou
Summary: This paper studied the degradation of amoxicillin by ultrasound-zero valent iron activated sodium persulfate and optimized the best degradation conditions. The research found that ultrasonic power, sulfate concentration, and zero-valent iron dosage have significant impacts on the removal efficiency of amoxicillin.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Hongwei Pang, Lijie Liu, Ziang Bai, Ruixing Chen, Hao Tang, Yawen Cai, Shujun Yu, Baowei Hu, Xiangke Wang
Summary: The research investigates the surface sulfidation impact on the modification of NZVI materials and the mechanism and efficiency of organic matter degradation by Sulfide NZVI. The results show that sulfidation treatment significantly enhances the stability and functionality of the material, resulting in higher degradation efficiency and pollutant removal capacity, which is beneficial for environmental governance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Siwan Liu, Wenwei Yu, Huang Cai, Faying Lai, Hansun Fang, Huajun Huang, Jinbao He
Summary: In this study, a comparison of different iron minerals and zero-valent metals as catalysts for the Fenton-like process for the removal of imidacloprid was conducted. Zero-valent iron (ZVI) showed the highest activity among the recyclable solid catalysts, while pyrite exhibited stability and sustainable ability, making it a promising catalyst for Fenton-like reactions. The system predominantly proceeded through a homogeneous route via dissolved Fe or Cu ions, with low possibility of causing secondary pollution of toxic metals for most tested catalysts.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Hao Cheng, Chao Huang, Ping Wang, Dingxun Ling, Xiaoyu Zheng, Haiyin Xu, Chongling Feng, Hao Liu, Min Cheng, Zhiming Liu
Summary: In this study, molybdenum sulfide (MoS2) was used as a co-catalyst to enhance the performance of the nanoscale zero-valent iron (nZVI) based Fenton-like process for Rhodamine B (RhB) degradation. The addition of MoS2 significantly accelerated H2O2 decomposition and increased the RhB degradation rate constant compared to the conventional Fenton process. Furthermore, the effective pH range was expanded to 9.0 with a high removal rate of RhB. The MoS2/nZVI system exhibited stability and reusability. The involvement of various reactive species, such as hydroxyl radicals, superoxide anions, and singlet oxygen, was confirmed through quenching tests and electron paramagnetic resonance. The toxicity of degradation products decreased after treatment, indicating the potential of this MoS2 co-catalytic nZVI-based Fenton-like process for organic wastewater treatment.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Jia-Qi Chen, Guan-Nan Zhou, Rong-Rong Ding, Qi Li, Han-Qing Zhao, Yang Mu
Summary: In this study, the performance and mechanism of the S-nZVI/Fe2+ system for oxygen activation to remove emerging contaminants (ECs) were comprehensively explored. The S-nZVI/Fe2+ system showed significantly higher kinetic rate constant for the oxidative degradation of ECs compared to other systems, and demonstrated high efficiency in EC mineralization and detoxification. The addition of Fe2+ promoted the corrosion of S-nZVI, leading to improved O2 activation and consecutive single-electron O2 activation for & BULL;OH production. The pH-insensitive Fenton-like degradation process by S-nZVI/Fe2+ indicated its robust performance over a wide pH range. This study provides valuable insights for the practical implementation of nZVI-based technology in achieving high-efficiency removal of ECs from water.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Jinbin Lin, Jing Zou, Hengyu Cai, Yixin Huang, Jiawen Li, Junyang Xiao, Baoling Yuan, Jun Ma
Summary: Hydroxylamine (HA) was introduced into the Fe(II)/PAA process to enhance its oxidation capacity for diclofenac degradation. The study identified reactive species and decomposition products, proposed degradation pathways, and investigated the impacts of various factors on diclofenac removal. The research highlighted a promising strategy to improve the Fe (II)/PAA process and its potential application in water treatment.
Article
Green & Sustainable Science & Technology
Luca Martone, Marco Minella, Claudio Minero, Fabrizio Sordello, Davide Vione
Summary: ZVI-electro-Fenton achieves complete degradation of contaminants, such as ibuprofen, by gradually and in-situ electrochemically generating H(2)O(2), addressing issues related to H2O2 storage and handling, and enabling degradation at pH values more compatible with water treatment.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Xiaojing Sun, Xiaoxi Ni, Xilin Wang, Dongyan Xu
Summary: A composite catalyst based on zero-valent iron was successfully synthesized using red mud and scrap tires. The catalyst showed high efficiency in degrading methylene blue. The study also identified the contributions of different reactive oxygen species to the degradation process.
SURFACES AND INTERFACES
(2022)
Article
Environmental Sciences
Xingchen Yang, Guoce Yu, Lejin Xu, Jianlong Wang
Summary: This study investigates the degradation of spent radioactive organic solvents using synthesized nanoscale zero-valent iron as a heterogeneous Fenton-like catalyst. The performance of the catalyst and the degradation mechanism were studied, and the possible intermediates were analyzed.
Article
Chemistry, Physical
Hongzhou Lv, Hongyun Niu, Xiaoli Zhao, Yaqi Cai, Fengchang Wu
Summary: Fe@C composites derived from different starting materials exhibit varying catalytic activity and stability in wastewater treatment. Fe@C derived from Fe-ATA shows good activity and reusability in Fenton-like reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Chuanyu Qin, Jingyi Zhang, Chengwu Zhang, Yu He, Paul G. Tratnyek
Summary: The study found that zero valent iron can degrade nitrobenzene through both reduction and advanced oxidation under oxygen-limited conditions. The contribution of center dot OH to the degradation of nitrobenzene increases with time, with reduction remaining the main pathway of transformation. The balance between ZVI, dissolved oxygen, and iron-complexing ligands is crucial for the optimal removal of organic contaminants.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Menghan Sun, Liangzhi Zou, Pengcheng Wang, Xinfei Fan, Zonglin Pan, Yanming Liu, Chengwen Song
Summary: This study proposes a membrane-based Fenton process with immobilized nano zero valent iron (NZVI) in a CNT membrane for efficient degradation of pollutants. The Fe0-CNT catalytic membrane enhances the generation rate of (OH)-O-center dot through the cycle of ferrous and ferric ions, while also improving mass transfer. The membrane shows high removal efficiency for various organic contaminants and is not significantly affected by environmental factors, suggesting its potential for wastewater treatment applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Yunfeng Tan, Yangyang Zhang, Bo Zu, Yunxia Zhang, Chunli Zheng, Kejun Chen
Summary: This study employed a composite of hydrochloric acid-modified kaolinite supported nanosized zero-valent iron (mk-nZVI) for the efficient degradation of methyl orange (MO) via the Fenton reaction. The successful loading of Fe-0 onto the hydrochloric acid-modified kaolinite was confirmed through various analyses. Manipulation of key variables, such as solution pH and temperature, demonstrated improved degradation performance of the mk-nZVI/H2O2 system. The synthesized mk-nZVI composite holds promise for efficient treatment of MO in water, making it a prospective composite material for wastewater remediation.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Energy & Fuels
Zehua Pan, Jian Shen, Jingyi Wang, Xinhai Xu, Wei Ping Chan, Siyu Liu, Yexin Zhou, Zilin Yan, Zhenjun Jiao, Teik-Thye Lim, Zheng Zhong
Summary: This study proposes a diesel-fueled SOFC distributed power generation system and conducts thermodynamic analysis. The water condenser is found to be vital for improving system efficiency, while the presence of H2S can lead to a decrease in system efficiency and potential irreversible damage.
Article
Engineering, Environmental
Guicai Liu, Xinyi Wu, Ya Zhao, Andrei Veksha, Apostolos Giannis, Teik Thye Lim, Grzegorz Lisak
Summary: CuO Oxygen carrier (OC) and Ba/Sr sorbent supported by Mg-Al composites synthesized by mechanical mixing exhibited great reactivity and stability during the three-stage MSW syngas chemical looping combustion and HCl adsorption (CLCA) process. The Ba/Sr sorbent slightly influenced the redox ability of OC but had no impact on MSW syngas combustion, maintaining stability for 20 cycles. Higher H2O content and temperature facilitated sorbent regeneration for better HCl adsorption efficiency, and Ba-loading composite showed superior HCl adsorption performance due to its better regeneration efficiency. The migration of CuO/Cu to the surface enhanced stability in mechanical strength, elemental composition, and redox ability during long-term operation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Wen Jie Lee, Yueping Bao, Arvin Liangdy, Xiao Hu, Teik-Thye Lim
Summary: This study evaluated the application of a catalytic ceramic membrane in the degradation of recalcitrant micropollutants in the Hybrid Oxidation Separation Technology. The Ce-CCM/O-3 HOST process showed efficient degradation and mineralization of micropollutants with low oxidant consumption, while the Co-CCM/PMS HOST process exhibited selective degradation of specific pollutants. The study also identified reactive oxygen species and tested the robustness of the system using real water matrices.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Boon Chong Ong, Hong Kit Lim, Chor Yong Tay, Teik-Thye Lim, ZhiLi Dong
Summary: Introducing cobalt-based polyoxometalates (CoV-POMs) into peroxymonosulphate (PMS) greatly enhances the catalytic activation for a complete degradation of organic dyes. The CoV-POMs exhibit non-toxic behavior towards normal cells and also showcase anticancer properties against lung and breast adenocarcinoma cells, indicating their potential for large-scale wastewater treatment and cancer therapy.
Article
Nanoscience & Nanotechnology
Yueping Bao, Weili Yan, Ping-Ping Sun, Justin Zhu Yeow Seow, Shun Kuang Lua, Wen Jie Lee, Yen Nan Liang, Teik-Thye Lim, Zhichuan J. Xu, Kun Zhou, Xiao Hu
Summary: Porous boron nitride nanorods synthesized via pyrolysis demonstrate excellent catalytic performance in organic degradation by generating singlet oxygen. The defects on the porous boron nitride drive non-radical oxidation reactions, resulting in high robustness and less toxic intermediates. These findings provide new theoretical and practical insights for using porous boron nitride as a non-metal catalyst.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Yi Han, Mingjie Huang, Wei Xiang, Chen Wang, Yongjie Li, Xiaohui Wu, Juan Mao, Tao Zhou, Hong Li, Deming Wu
Summary: This study reveals a mechanism of Fe-based metal-organic frameworks in the rapid degradation of recalcitrant organic substances using oxidants such as H2O2. The process occurs in two stages, activation stage and rapid degradation stage. In the activation stage, H2O2 is slowly activated, forming superoxide radicals. In the rapid degradation stage, the reductive dissolution of iron ions leads to a subsequent Fenton reaction, resulting in the rapid oxidation of organic compounds.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Mingjie Huang, Yi Han, Wei Xiang, Chen Wang, Juan Mao, Tao Zhou, Xiaohui Wu, Han-Qing Yu
Summary: This study develops an ultrafast dehalogenation system that is dominated by O2 center dot- through molecular O2 activation by oxygen vacancy-rich CuO nanoparticles. The system shows high efficiency in degrading halogenated organic compounds, and the selectivity of O2 center dot- generation is enhanced through oxygen vacancy enrichment and the presence of carbonate species. This work provides a new opportunity for selective O2 center dot- generation for dehalogenation and other environmental applications through interfacial defect engineering.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Environmental
Arvin Liangdy, Wen Jie Lee, Panyawut Tonanon, Richard David Webster, Shane Allen Snyder, Teik-Thye Lim
Summary: A catalytic ceramic membrane (CCM) impregnated with Co-Mn-oxide via citrate sol-gel method was used to activate peroxymonosulfate (PMS) and degrade sulfamethoxazole (SMX). The Co-Mn bimetallic oxides exhibited higher catalytic activity compared to their single oxides due to the synergistic effect between the two cations. Optimal performance of the CCM/PMS process was achieved by controlling catalyst loading, oxidant dosage, and pollutant concentration.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Lek Hong Lim, Preston Tan, Wei Ping Chan, Andrei Veksha, Teik-Thye Lim, Grzegorz Lisak, Wen Liu
Summary: Waste-to-Energy through MSW incineration is an effective waste management strategy, but it releases CO2 and produces ash. This study explores the use of ash-derived sorbents for CO2 capture. The analysis shows that the addition of certain fuels increases the cost of electricity, but also reduces CO2 emissions. Optimizing energy-intensive processes and policy support are important for further improvement and adoption of negative emission technologies.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Satya Brat Tiwari, Thomas J. N. Hooper, Andrei Veksha, Wei Ping Chan, Xunchang Fei, Wen Liu, Grzegorz Lisak, Teik-Thye Lim
Summary: This study investigated the leaching of phosphorus from sewage sludge (SS) using alkaline treatment, with the addition of alum sludge (AS) and acidic pretreatment. The results showed that the addition of AS improved the recovery efficiency of phosphorus during alkaline leaching, and acidic pretreatment prevented the loss of inorganic phosphorus. This method can be applied globally to improve phosphorus leaching efficiency from SS and achieve dual waste management.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Chat How Joewin Koh Yang, Guicai Liu, Wei Ping Chan, Ya Zhao, Mei Ping Vernette Chin, Wen Liu, Teik Thye Lim, Grzegorz Lisak
Summary: The utilization of ferric sludge as an oxygen carrier (OC) for chemical looping combustion (CLC) of municipal solid waste (MSW) syngas was explored. The performance of ferric sludge in CLC and simultaneous HCl removal was evaluated and compared with iron ore as a benchmarked OC. The results showed that ferric sludge performed better than iron ore in terms of syngas combustion efficiency and HCl removal. Temperature comparison revealed that ferric sludge performed better at lower CLC temperature. Agglomeration was observed when ferric sludge was used in extended CLC cycles, but it was reduced when inert alpha-Al2O3 support was used.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Arvin Liangdy, Wen Jie Lee, Yueping Bao, Wen-Da Oh, Teik-Thye Lim
Summary: The hybrid catalytic oxidation and membrane filtration process is becoming a popular research topic for removing micropollutants in water. This review focuses on the use of metal oxide-functionalized catalytic ceramic membranes (CCMs) in sulfate radical-based hybrid processes. The fabrication methods of MeOx-CCMs and various characterization techniques are discussed. The importance of intrinsic catalytic and membrane properties in the hybrid process is emphasized, as well as the challenges in real water remediation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Boon Chong Ong, Zhong Chen, Teik-Thye Lim, ZhiLi Dong
Summary: In this study, an effective hole scavenger layer of polyoxometalates (POMs) with excellent redox properties and high durability is coated on titanium dioxide (TiO2) nanorods to enhance the photoelectrochemical (PEC) water oxidation activity. The Co-POMs layers on TiO2 can effectively retard the recombination of photoinduced electron-hole pairs by extracting and transporting the generated holes, resulting in improved overall PEC performance under neutral conditions. This work provides a facile and promising method for promoting PEC water oxidation by depositing Co-POMs layers on TiO2 nanorods.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Wanyi Huang, Yixing Yuan, Dan Zhong, Peng Zhang, Arvin Liangdy, Teik-Thye Lim, Wencheng Ma, Yuan Yuan
Summary: We compared the elimination of 5-bromosalicylic acid (BSA) in goethite (alpha-FeOOH)/H2O2 and lepidocrocite (gamma-FeOOH)/H2O2 systems. BSA could be adsorbed on alpha- and gamma-FeOOH and effectively degraded after the addition of H2O2. The systems showed differences in adsorption kinetics and degradation mechanisms, with gamma-FeOOH having greater adsorption ability and alpha-FeOOH performing better in catalyzing the decomposition of H2O2.
Article
Engineering, Environmental
Amadu T. Bah, Ziyi Shen, Junna Yan, Feihu Li, Teik Thye Lim
Summary: By combining batch adsorption enrichment with struvite crystallization, we prepared ternary layered double hydroxides (LDHs) with P-preferring elements and evaluated their performance in recovering P from water. The LDHs demonstrated high P adsorption capacities and the recycling tests showed good enrichment for P. Moreover, more than 96% of phosphorus in the P-enriched eluates can be efficiently reclaimed via struvite crystallization. These findings demonstrate the feasibility of combining adsorption enrichment with struvite crystallization for P recovery.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
