Article
Environmental Sciences
Mohammad Amini, Seyed Mehdi Pourmoheb Hosseini, Naz Chaibakhsh
Summary: In this research, a NiO@Fe3O4 nanocomposite was prepared and applied in the catalytic ozonation process for the degradation of ciprofloxacin antibiotic. The optimized conditions for maximum ciprofloxacin removal efficiency were found to be pH = 6.5, 7.5 mg NiO@Fe3O4 nanocatalyst, and 0.2 g L-1 h(-1) ozone flow for 20 minutes. The nanocatalyst showed high recyclability and stability (88.37%) after five consecutive catalytic ozonation cycles.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Jinshan Song, Nengwei Ma, Wenqing Chen, Jianmeng Chen, Qizhou Dai
Summary: A magnetic Fe3O4@SiO2@La2O3 nano-catalyst with a core-shell structure was synthesized to improve the efficiency of catalytic ozonation of cinnamyl alcohol in this study. The catalyst not only greatly enhanced the degradation of cinnamyl alcohol, but also displayed good reusability and stability, with relatively good economic efficiency. The degradation rate of cinnamyl alcohol could reach up to 99.8% at 30 min with the help of the catalyst.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Nagarajan Padmavathy, Indranil Chakraborty, Abishek Kumar, Anindo Roy, Suryasarathi Bose, Kaushik Chatterjee
Summary: A customized polymer composite has been developed that provides electromagnetic shielding, protects medical electronics, and has antibacterial properties.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Eman A. Bakr, Marwa N. El-Nahass, Wafaa M. Hamada, Tarek A. Fayed
Summary: This study developed a facile synthetic route for reusable nanocatalysts based on the combination of magnetite's supermagnetic properties with the unique optical and catalytic properties of noble metal hybrid nanomaterials. Compared two synthetic methods, thermal decomposition and hydrothermal, for Fe3O4 and Fe3O4@M (M = Ag or Au) core-shell hybrid nanostructures synthesis. The hydrothermal method showed better crystalline structure and particle dispersion, as well as better catalytic performance for Fe3O4@Ag and Fe3O4@Au.
Article
Environmental Sciences
Jun Wu, Qi Sun, Jian Lu
Summary: Antibiotic pollution is a major concern for sustainability, and catalytic ozonation is an efficient technique for removing contaminants in water. This study developed a nanosheet-growth technique to synthesize a Li-doped Mg(OH)(2) catalyst for ozonizing antibiotics, achieving complete removal of metronidazole in just 10 minutes. The Li-doped Mg(OH)(2) catalyst exhibited a nano-confinement effect and had a significantly higher reaction rate compared to nano-Mg(OH)(2). The synthesized Mg(OH)(2) nanosheet with a dot-sheet hierarchical structure showed excellent reusability and catalytic performance.
Article
Chemistry, Physical
Juan Shi, Jinli Zheng, Ben Liang, Fengmin Song, Jin Wang, Shaobo Guo, Hongguang Ge, Yanhong Gao, Tianlei Zhang
Summary: Integrating metal nanocomposites into a matrix is a promising approach for improving material properties. In this study, Fe3O4@SiO2@mTiO2-NH2@Ag (FSTN-Ag) nanocomposites were synthesized and demonstrated high catalytic activity and antibacterial properties.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Yujie Liu, Haijun Zhou, Jinling Wang, Ding Yu, Zhaolei Li, Rui Liu
Summary: Core-shell nanoparticles (Fe3O4@PDA) wrapped with Ag were prepared using a simple and green synthesis method. The obtained nanoparticles showed excellent catalytic activity and selectivity, indicating their potential applications in various fields.
Article
Green & Sustainable Science & Technology
Shuang Wang, Mei-ru Chen, Si-bo Shen, Cai-hong Cheng, Ai-jun Cai, Ai-jun Song, Xu-lin Lu, Gui-sheng Gao, Ming-zhen Ma, Zhi-wei Zhang, Xi-yan Xu
Summary: A conduct-semiconductor-type catalyst Fe7S8@MoS2-O with strong visible light absorption and long carrier life was synthesized using the one-pot hydrothermal method. The catalyst showed high efficiency in the degradation of malachite green and levofloxacin, which could be further enhanced by peroxymonosulfate. It also exhibited good disinfection performance for Staphylococcus aureus and Escherichia coli. The band structures of the catalyst were analyzed using density functional theory calculations.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Polymer Science
Akbar Hajipour, Fahimeh Derakhshanifard, Ali Mehrizad, Leila Amirkhani
Summary: This study investigated the feasibility of employing a novel Fe3O4/Mg(OH)(2)/4A zeolite catalyst for catalytic ozonation treatment of real dairy effluent. Experimental results using response surface methodology demonstrated that approximately 80% COD reduction was achieved within 30 minutes at a natural pH of around 7, with catalyst and ozone dosages of 5 g/L and 9 mg/min, respectively.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Environmental Sciences
Hai Chen, Jianlong Wang
Summary: The spinel NiCo2O4 catalyst showed enhanced mineralization of SMT over a wide pH range. The generation of (OH)-O-center dot was improved by NiCo2O4, which played a crucial role in TOC removal during ozonation. Co ions may indirectly promote the catalytic ozonation process, while the Ni2+/Ni3+ cycle in the catalyst was vital for generating free radicals and enhancing mineralization.
Article
Chemistry, Physical
Elena Karpova, Elizaveta Shcherbacheva, Maria A. Komkova, Andrei A. Eliseev, Arkady A. Karyakin
Summary: This study introduces nanoparticles with PB core and NiHCF shell, showing high catalytic activity and stability. The nanozymes, which outperform enzymes and are suitable for sensors, could potentially be used in the development of anti-inflammatory drugs and biosensors.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Chun-Rong Lin, Oxana S. Ivanova, Dmitry A. Petrov, Alexey E. Sokolov, Ying-Zhen Chen, Marina A. Gerasimova, Sergey M. Zharkov, Yaw-Teng Tseng, Nicolay P. Shestakov, Irina S. Edelman
Summary: Fe3O4@SiO2 core-shell nanoparticles were synthesized and functionalized for studying their magnetic, structural, and adsorption properties. The magnetic core of the nanoparticles showed nanocrystalline structure with an amorphous silica shell, and the nanoparticles exhibited high saturation magnetization. The adsorption studies on three dyes showed that the nanoparticles followed pseudo-second order kinetics and had maximum adsorption capacity for Congo red according to the Langmuir isotherm.
Article
Chemistry, Physical
Van-Tuan Hoang, Lemma Teshome Tufa, Jaebeom Lee, Mai Quan Doan, Nguyen Ha Anh, Van Tan Tran, Anh-Tuan Le
Summary: This study investigates the surface-enhanced Raman spectroscopy (SERS) performance of Ag@Fe3O4 core-shell nanoparticles with different sizes. The smallest nanoparticles with thin shell and high shell porosity exhibit significantly improved mass diffusion and SERS performance, making them ideal substrates for highly sensitive detection of organic pollutants. Quantitative SERS measurements using the Ag@Fe3O4 nanoparticles were successfully demonstrated with methylene blue (MB) as probe analytes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xin Wang, Jing Zheng, Peiyu Li, Xue-Bo Yin, Siyao Wang, Baishun Zhang, Jingli Xu, Min Zhang
Summary: The integration of noble metal nanoparticles on magnetic hollow structures provides a great platform for designing hybrid catalysts with high efficiency and recoverability. In this study, Ag NP decorated Fe3O4@C hollow magnetic microtubes were successfully prepared and showed remarkable catalytic activity in the reduction of 4-nitrophenol.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
Yujie Liu, Haijun Zhou, Jinling Wang, Shiyun Li, Zhaolei Li, Jiaoxia Zhang
Summary: Through the design of nanostructured core-shell materials, efficient and selective catalysis of organic dyes has been achieved, with good recyclability and environmental friendliness.
Article
Engineering, Environmental
Qi Sun, Guangcan Zhu
Summary: This study investigated the degradation performance of metronidazole in a bioelectrochemical system. The results showed that metronidazole could be rapidly degraded in the bioelectrochemical system, with a degradation rate higher than that in open circuit and nonbiological cathode systems. Increasing the electric current accelerated the degradation process, while increasing the initial metronidazole concentration slightly reduced the degradation efficiency. Additionally, high-throughput sequencing analysis revealed significant differences in microbial community structure among the tested systems.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2022)
Article
Engineering, Civil
Yumin Wang, Guangcan Zhu
Summary: To address the issue of chlorine concentration in water distribution systems, this study proposes a fuzzy credibility-constrained quadratic programming model incorporating credibility levels and weight coefficients. The model is applied to two systems and shows that booster cost is inversely related to credibility level and weight coefficient. These findings provide useful insights for decision-making in disinfection injection under conditions of fuzzy uncertainty.
AQUA-WATER INFRASTRUCTURE ECOSYSTEMS AND SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Qi Zeng, Chu-Ya Wang, Bo-Xing Xu, Jianyu Han, Xin Fang, Guangcan Zhu
Summary: Bismuth oxybromide (BiOBr) has potential as a visible-light-driven photocatalyst due to its special layered structure. Ce doping can modify its band structure and enhance its photocatalytic performance.
Article
Chemistry, Multidisciplinary
Chu-Ya Wang, Qi Zeng, Li-Xia Wang, Xin Fang, Guangcan Zhu
Summary: In this study, noble metal silver was used to modify bismuth oxybromide and Ag-doped BiOBr nanoplates were synthesized. The modified Ag-BiOBr showed improved absorption efficiency of visible light and exhibited higher photocatalytic activity for the degradation of bisphenol A. This novel visible-light-driven photocatalyst presents a promising strategy for organic pollution control in water and wastewater treatment.
Article
Environmental Sciences
Qi Sun, Guangcan Zhu
Summary: The study demonstrates that three-dimensional biofilm-electrode reactors can simultaneously remove nitrate and metronidazole from wastewater, with the intermediates produced by MNZ acting as carbon sources to enhance denitrification by denitrifying bacteria.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Civil
Yumin Wang, Jianguo Zhu, Guangcan Zhu
Summary: This paper proposed a method using information entropy to measure water quality reliability in a water distribution system, and developed a water quality reliability evaluation method based on improved water quality entropy. The results showed a strong correlation between flow entropy and water quality entropy, as well as between improved flow entropy and improved water quality entropy.
AQUA-WATER INFRASTRUCTURE ECOSYSTEMS AND SOCIETY
(2022)
Article
Engineering, Environmental
Yongzhen Wang, Yongze Lu, Xin Li, Guangcan Zhu, Na Li, Jing Han, Liwei Sun, Zhonglian Yang, Raymond Jianxiong Zeng
Summary: This study investigates the interactions between co-metabolism and photodegradation in the degradation of trace organic compounds (TOrCs). Results show that co-metabolism coupled with photodegradation significantly enhances the degradation efficiency of TOrCs, and light also reduces the toxicity of co-metabolism degradation products.
Article
Green & Sustainable Science & Technology
Liying Gong, Xuanxuan Zhao, Guangcan Zhu
Summary: By combining constructed wetlands with either cascade biological contact reactors or carousel oxidation ditch reactors, anaerobic cyanobacteria fermentation effluent can be effectively treated, reducing nutrient loads and utilizing nutrient resources in biogas slurry. Aquatic vegetation is capable of absorbing the majority of nitrogen and phosphorus, effectively enhancing pollutant removal in the effluent.
Article
Engineering, Environmental
Jingya Wu, Liling Zhang, Meng Zhang, Yongze Lu, Yani Zhao, Shuping Li, Liwei Sun, Guangcan Zhu
Summary: The biological treatment process in high-altitude areas is affected by low atmosphere pressure and low oxygen content. However, simultaneous nitrification, denitrification, and phosphorus removal (SNDPR) process can effectively solve the problems with high efficiency and low operation cost. Under the condition of 72 kPa, optimizing the SNDPR system by prolonging the anaerobic time and reducing the aeration time can improve the treatment performance.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2022)
Article
Engineering, Environmental
Chufeng Shi, Hongyang Wang, Ao Li, Guangcan Zhu, Xiaoli Zhao, Fengchang Wu
Summary: Flow-electrode capacitive deionization (FCDI) is a sustainable technology for ion removal, although its energy consumption is relatively high compared to other desalination technologies. By simulating the energy consumption of each FCDI component, this study aimed to optimize the main components and improve our understanding of the energy consumption. The results showed that the flow electrodes had the highest energy consumption, while the ion-exchange membranes and desalination chamber contributed the most to the overall energy consumption. By adding titanium mesh to the flow electrodes and desalination chamber, the energy consumption of the optimized FCDI decreased by 51.9%.
Article
Engineering, Civil
Yumin Wang, Guangcan Zhu
Summary: In this work, an optimization model is proposed to handle the uncertainty of boosters in water distribution systems (WDSs). The model can handle the nonlinear and interval objective function, interval left-hand sides of constraints, and trapezoidal fuzzy uncertainty of the right-hand sides of constraints. The model was applied to two case studies to obtain optimal cost intervals for boosters. The results showed that the lower and upper bounds of costs increased with confidence levels, preference parameter lambda values, and the number of boosters. Additionally, boosters located far from the source were beneficial for reducing costs. Operation costs decreased with an increase in booster numbers and increased with lambda values and confidence levels. The obtained results can assist managers in making economical decisions for booster numbers and injection rates under uncertainty.
JOURNAL OF PIPELINE SYSTEMS ENGINEERING AND PRACTICE
(2023)
Article
Engineering, Environmental
Jianyu Han, Mingxuan Zhao, Kaiqing Wu, Yixin Hong, Tianyi Huang, Xiaofei Gu, Zhi Wang, Songqin Liu, Guangcan Zhu
Summary: A bifunctional single-atom catalyst (SAC) with a Co-CN2 configuration was constructed to simultaneously degrade PFOA and reduce O2 to H2O2. The oxidative and reductive degradation were integrated within one system using immobilized Fe2O3 as a Fenton catalyst. The Co-CN2-Fe2O3 catalyst achieved a 96.1% degradation of PFOA and a 95.9% defluorination efficiency in 120 minutes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xin Fang, Chu-Ya Wang, Long-peng Zhou, Qi Zeng, Heng-Deng Zhou, Qi Wang, Guangcan Zhu
Summary: Photocatalytic reduction of CO2 into valuable resources is an efficient solution to mitigate the energy crisis and effects of climate change. However, the low efficiency of photocatalytic CO2 reduction under visible light limits industrial applications. In this study, Au-doped BiOBr nanosheets with enhanced electrochemical characteristics were successfully synthesized, resulting in a 2.5 times higher charge separation efficiency compared to BiOBr nanosheets. The Au-doped samples also exhibited an outstanding photocatalytic capacity for converting CO2 to CO, with a yield rate four times higher than that of the untreated nanosheets. The mechanism of CO2 reduction was elucidated using in situ Fourier-transform infrared spectroscopy. This study provides a facile method for achieving efficient reduction of CO2 through Au-doping modification of BiOBr nanosheets.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Shan Huang, Jingran Zhang, Chuqiao Wang, Guangcan Zhu, Mahdi Hassan
Summary: In this study, a series of potentiostatic bioelectrochemical systems (BESs) for wastewater with a low COD/N ratio were constructed to investigate the denitrification effect under different constant potentials. The results showed that the weak electric field (WEF) in microbial fuel cells (MFCs) enhanced denitrification effect by increasing biomass, abundance of denitrifying functional bacteria, expression of functional genes, and enzyme activities. The electron transfer method mainly involved direct electron transfer, and there were at least two electroactive components. These findings have important theoretical significance and practical implications for the application of microbial electrochemical systems in wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Jiachang Pi, Guangcan Zhu, Tingting Gong, Yongze Lu
Summary: It was found that planting aquatic plants in constructed wetlands for treating micro-polluted raw water can lead to an increase in disinfection by-product (DBP) precursors in the effluent, with properties similar to natural organic matter and consisting mainly of fulic acid and humus. The content of humic substances in water is correlated with the molecular weight of DOM.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)