Article
Engineering, Environmental
Yunfei Ma, Jianbing Wang, Huijiao Wang, Chunrong Wang, Can He, Xian Zhang
Summary: An integrated mathematical model for simulating the performance of AC catalytic ozonation reactors was developed, showing a high predictive power. Sensitivity analysis revealed the significant influence of certain parameters on simulation results, with optimal conditions identified as 5 g/L catalyst dosage, 0.05 L/min gas flow rate, and 50 mg/L initial ozone concentration.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Clement Matthew Chan, Rebecca Lyons, Paul G. Dennis, Paul Lant, Steven Pratt, Bronwyn Laycock
Summary: This study investigated the impact of the commonly used plasticizer DBP on the biodegradation of PHBV in soil. The presence of DBP delayed the initial stage of PHBV biodegradation but then accelerated subsequent rates of biodegradation. Furthermore, it led to significant increases in total bacterial and fungal biomass and altered the composition of microbial communities.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yuting Liang, Jiayi Li, Yaoyu He, Zhi Jiang, Wenfeng Shangguan
Summary: The study found that as the temperature increases, the model SVOC DMP gradually oxidizes on the surface of supported catalysts, with carbon dioxide as the main product, but aromatic products and small molecule products are still observed at different temperatures.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Jiawei Chen, Lei Zhao, Ying Yi, Cheng Deng, Zongxing Zhang, Jinhui Wu, Mengfu Zhu
Summary: The study successfully constructed a Co@N-CNT catalyst through one-step solid-state pyrolysis reaction, which showed excellent performance in catalytic ozonation reaction by effectively degrading organic dyes with a removal efficiency about 35% higher compared to ozonation alone. EPR experiments and quenching tests indicated that both .O-2(-) and O-1(2) were dominant ROS contributing to the improved degradation efficiency in the Co@N-CNT/O-3 system.
Article
Chemistry, Applied
Joa Restivo, Carla A. Orge, Ana Sofia G. G. Santos, O. Salome G. P. Soares, M. Fernando R. Pereira
Summary: A novel methodology for preparing nanostructured composite catalysts with different ceria-CNT combinations was investigated, showing that the synthesis routes and preparation methods significantly affected the catalytic performance and characteristics of the slurry used for dip-coating. Among them, ball-milled sol-gel ceria with CNT showed the highest catalytic activity in powder form, while impregnated CNT with well-dispersed ceria was the most active structured catalyst prepared from coating with the powder composites.
Article
Engineering, Environmental
Marckens Francoeur, Christelle Yacou, Eddy Petit, Dominique Granier, Sarra Gaspard, Stephan Brosillon, Andre Ayral
Summary: The study aimed to determine the optimal conditions for the preparation of magnetic activated carbons (mACs) from Sargassum sp. as adsorbents and catalytic supports. The mACs showed better adsorption capacity and degradation efficiency for antibiotics when prepared by the post-impregnation method compared to the pre-impregnation method. The physicochemical properties of the mACs were characterized using various techniques, and the use of Sargassum sp. was found to be promising for the removal of organic pollutants from polluted waters.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Haleh Mohebali, Gholamreza Moussavi, Meghdad Karimi, Stefanos Giannakis
Summary: We investigated the catalytic activity of magnetic CeZrUiO-66 Metal-Organic Framework (MOF) composites (Fe3O4/CeZrUiO-66) for ciprofloxacin degradation by catalytic ozonation. The composite with a 30:70 ratio of Fe3O4:CeZrUiO-66 exhibited the highest efficiency, achieving a 97% elimination yield within 30 minutes. The catalytic ozonation process (COP) showed higher CIP mineralization compared to the single ozonation process (SOP), and OH radicals were identified as the main reactive species.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Shiwen Li, Jianming Pang, Wei Han, Xiaoyu Cheng, Can Meng, Nailin Li, Min Zeng, Jue Liu
Summary: Large-scale magnetic Co nanoparticles/N-doped carbon nanotubes hybrids were synthesized for microwave-induced degradation of tetracycline (TC). The Co@NCNTs-5 hybrid showed excellent degradation performance, removing 99.5% of TC (20 mg/L, natural pH) after 6 minutes of microwave irradiation (520 W). The Co@NCNTs-5 also exhibited competitive degradation efficiency over TC at various concentrations and pH values.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Hariprasad Pokkiladathu, Salman Farissi, Anbazhagi Sakkarai, Muthukumar Muthuchamy
Summary: Rampant water pollution events and rising water demand indicate an impending water crisis. Conventional wastewater treatment systems are unable to effectively remove contaminants, calling for new and efficient technologies. This study used ozonation and an activated carbon impregnated nanocomposite-bimetallic catalyst to achieve higher COD removal rates.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Polymer Science
H. Norazlina, Y. Kamal
Summary: PLA nanocomposites were prepared with the addition of 5 wt% PEG as a plasticizer, and the studies on hardness testing and MFI showed that PLA/mCNTs and PLA/PEG/mCNTs with 1.5 wt% CNTs exhibited the highest performance in both hardness testing and MFI compared to other material loadings.
Article
Environmental Sciences
Hai Chen, Zhonglei Zhang, Dongming Hu, Chuanhong Chen, Youxue Zhang, Shijun He, Jianlong Wang
Summary: Co3O4-carbon composite prepared by calcining ZIF-67 is an efficient catalyst for the ozonation of norfloxacin, enhancing its degradation and mineralization. The composite provides diverse active sites, accelerates the generation of active free radicals, and maintains stable performance even after repeated use, making it suitable for wastewater treatment.
Article
Environmental Sciences
Yilin Dong, Jing Sun, Xiaoling Ma, Wenlong Wang, Zhanlong Song, Xiqiang Zhao, Yanpeng Mao, Wenxiang Li
Summary: MnOx has received widespread attention in low-temperature catalytic oxidation of VOCs, but the synergy effect of MnOx and support on the VOCs catalytic ozonation has been rarely studied. In this study, different MnOx/X materials were synthesized and it was found that the support greatly affects the catalytic oxidation activity. MnOx/MCM-41 exhibited the best catalytic activity, completely degrading O3 and VOCs at room temperature. Moreover, MnOx/MCM-41 showed strong water resistance and stability. The supply of loading sites and the improvement of interfacial electron transfer are the manifestations of the synergy between the support and MnOx in promoting the catalytic ozonation of VOCs.
Article
Environmental Sciences
Yuan He, Liangjie Wang, Zhan Chen, Bo Shen, Jinshan Wei, Ping Zeng, Xianghua Wen
Summary: This study evaluated the oxidative reactivity of different crystal phases of MnO2 towards MET and IBU, with alpha-MnO2 showing the highest degradation efficiency. The study determined the optimal operating parameters and proposed probable degradation pathways for MET and IBU.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Manman Li, Kunlun Yang, Xin Huang, Shiguang Liu, Yifan Jia, Peng Gu, Hengfeng Miao
Summary: In this study, a modified flat microfiltration ceramic membrane (Mn-Fe-CM) was used to catalyze ozone (O-3) for the oxidative degradation of trimethoprim (TMP). The Mn-Fe-CM showed improved catalytic performance for O-3 compared to the conventional CM. The degradation and mineralization efficiencies of TMP were enhanced in the O-3/Mn-Fe-CM system. The proposed degradation mechanism involved hydroxylation, carbonylation, demethoxylation, and deamination. The O-3/Mn-Fe-CM system exhibited strong catalytic ozonation performance and good anti-membrane fouling ability, making it suitable for surface water treatment.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Environmental Sciences
Kexue Liu, Na Li, Jia Ding, Na Chen, Suo Wang, Qian Wang, Xiangfeng Yao, Xianxu Li, Jun Wang, Huanshun Yin
Summary: In this study, the Bi2O2CO3/Bi2S3 heterojunction was prepared using a one-step hydrothermal method, with Bi(NO3)3 as the Bi source, Na2S as the sulfur source, and CO(NH2)2 as the C source. The loading of Bi2S3 was adjusted by varying the content of Na2S. The prepared Bi2O2CO3/Bi2S3 exhibited strong photocatalytic activity towards dibutyl phthalate (DBP) degradation, with a degradation rate of 73.6% under visible light irradiation for 3 hours, which was 3.5 and 1.87 times higher than that of Bi2O2CO3 and Bi2S3, respectively. Furthermore, the mechanism behind the enhanced photoactivity was investigated, and it was found that the formation of the heterojunction structure inhibited the recombination of photogenerated electron-hole pairs, improved visible light absorption, and accelerated the migration rate of photogenerated electrons. The S-scheme heterojunction model was consistent with the analysis of radical formation and energy band structure, and this heterojunction allowed for high photocatalytic activity of Bi2O2CO3/Bi2S3. The prepared photocatalyst also exhibited acceptable cycle application stability, providing a facile synthesis technique and a promising platform for DBP degradation.