Article
Engineering, Chemical
Zhicheng Wang, Weixin Xian, Yongsong Ma, Tao Xu, Rui Jiang, Hua Zhu, Xuhui Mao
Summary: This study demonstrates that Si-nZVI is a suitable candidate for catalytic ozonation process and offers a prospective oxidation technology for decontamination.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Congmin Wang, Yue Liu, Quan Zhao, Rong Guo, Yanyan Dou, Caixia Zhu
Summary: An amorphous copper silicate catalyst was prepared and characterized, showing the formation of Cu-Si binary oxide and CuO on its surface with abundant functional groups. The efficiency of p-chloronitrobenzene (p-CNB) removal was affected by the dosage of catalyst, ozone, and humic acid. The dominant reactive species for p-CNB degradation was found to be hydroxyl radical (•OH) based on scavenger experiments, ESR analysis, and pH experiments. The catalyst exhibited good catalytic activity and stability for five consecutive cycles.
DESALINATION AND WATER TREATMENT
(2023)
Article
Engineering, Chemical
Weiqiang Wang, Zhonglin Chen, Yanchi Zhou, Pengwei Yan, Jimin Shen, Shuyu Wang, Jing Kang, Jingyi Sun, Zhe Wang, Yanbin Tong
Summary: A novel flat microfiltration membrane was prepared by the compression method using cement and sucrose as a pore-forming agent for catalytic ozonation of iopamidol (IPM). The membrane structure contained various metal oxides and alkaline hydration products rich in hydroxyl groups. Hydroxyl radicals (center dot OH) were found to play a crucial role in the degradation process of IPM, which included amide hydrolysis, amino oxidation, and dehydrogenation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Mona Kohantorabi, Gholamreza Moussavi, Paula Oulego, Stefanos Giannakis
Summary: Calcined Hormuz Red Soil (C-HRS), a naturally hematite-containing mineral, showed remarkable catalytic activity in the ozonation process of Acetaminophen (ACT). C-HRS accelerated ozone decomposition and efficiently catalyzed the peroxone reaction for ACT degradation and mineralization, demonstrating high stability and reusability for consecutive catalytic cycles. This work provides a new, effective, and cost-efficient catalyst for accelerating ozone decomposition in pollutant oxidation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Xingyue Wei, Hanmin Zhang, Junsheng Wang, Yu Tian, Mengyang Lu
Summary: In this study, nanocarbon shells with self-inherent N, P derived from waste chlorella pyrenoidosa were prepared for catalytic ozonation, which showed superior performance compared to other common catalysts. The catalytic ozonation process followed a nonradical oxidation mechanism involving surface adsorbed atomic oxygen, singlet oxygen, and electron transfer pathway. The major active sites were identified as graphitic N, pyr-idinic N, and C3-P--O functional groups. Furthermore, the catalytic activity was found to be unaffected by the presence of inorganic anions and humic acid in the wastewater.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Mei Li, Yan Kang, Haoqin Ma, Jiahao Dong, Yuqi Wang, Shaoping Kuang
Summary: The treatment of heavy metal ion contamination in aquatic ecosystems has been a global concern. Iron oxide nanomaterials are effective in heavy metals removal, but face challenges due to Fe(III) precipitation and poor reusability. To improve the removal of heavy metals, iron-manganese oxide material (FMBO) was prepared. FMBO showed higher removal capacities for Cd(II), Ni(II), and Pb(II) compared to FeOOH. Mass spectrometry analysis revealed that the surface hydroxyls of FeOOH and FMBO provided active sites for metal complexation. FMBO, with its improved properties, is efficient for removing heavy metals from wastewater.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Jing Liang, Zhixue Li, Emmanuella Anang, Hong Liu, Xianyuan Fan
Summary: The removal of chlorinated pollutants from water is a significant topic in environmental engineering. This study investigates a technique using nanoparticles to remove p-chloronitrobenzene and its reduction products from water. The results demonstrate the effective removal of these pollutants through the coupling effect of n-Fe/Ni and the transformation of FeOOH. The study provides guidance for the remediation of water bodies polluted by chlorinated organics.
Article
Biochemistry & Molecular Biology
Yue Liu, Congmin Wang, Rong Guo, Juexiu Li, Quan Zhao, Weiqiang Wang, Fei Qi, Haifang Liu, Yang Li, Huifan Zheng
Summary: Iron-manganese silicate (IMS) was synthesized and used as a catalyst for ozonating acrylic acid (AA). The removal efficiency of AA was highest in the IMS catalytic ozonation processes, and the removal efficiencies of total organic carbon (TOC) were also improved. IMS showed high stability and ozone utilization.
Review
Environmental Sciences
Juan Manuel Peralta-Hernandez, Enric Brillas
Summary: Paracetamol (PCT), a widely prescribed drug, is not completely absorbed by animals and humans, leading to its contamination of aquatic environments through urine. Trace amounts of PCT have been found in various water sources. PCT has toxic effects on different organisms and ozonation methods have been proposed as effective treatments for its removal. This comprehensive review focuses on the application of ozonation processes, including direct ozonation and hybrid catalytic ozonation, for PCT removal from natural waters, synthetic waters, and real wastewaters. The review discusses the fundamentals, operating variables, best results, and mineralization performance of these ozonation methods.
Article
Environmental Sciences
Lei Chen, He Wang, Yanping Sun, Yue Zhao, Huixiang Shi
Summary: The study synthesized siliceous ferrihydrite (FhSi) through co-precipitation, which increased surface area, reduced the point of zero charge, and prevented iron leaching. The presence of silicon-occupied growth sites enhanced coordination symmetry, inhibited transition to more stable crystalline Fe (hydr)oxides, and improved catalytic performance in alkaline solutions. After five cycles of catalytic ozonation, the FhSi system exhibited higher surface hydroxyl group density and total acid content, leading to enhanced catalytic activity for ozone generation.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Lanhe Zhang, Yiran Li, Jingbo Guo, Zhongfeng Kan, Yanping Jia
Summary: CuFe2O4 is a promising catalyst for the catalytic ozonation of antibiotics in wastewater due to its easily recoverable, environmentally friendly and cost-effective properties. However, its catalytic activity is limited by its lack of active sites and low electron transfer efficiency. In this study, CTAB and Cu-0 were doped with CuFe2O4 to introduce more O-V, which provided more active sites and improved electron transfer efficiency. Experimental results showed that the catalyst made of CTAB doped with Cu-CuFe2O4 achieved an optimum removal efficiency of 81.58% for Norfloxacin, with a first-order reaction kinetics constant of 0.03967 min(-1).
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Jieling Ren, Zishen Lin, Yingying Yong, Chunli Zheng, Aibin Zhu, Chi He, Hua Pan
Summary: In this study, amorphous zero-valent iron (AZVI) was synthesized and loaded on kaolinite to prepare a composite material (KAZVI) for enhancing the removal of cadmium (II) (Cd(II)) in water. The results showed that K-AZVI had a larger particle size and better electron transfer ability compared to the crystalline composite (K-ZVI). The adsorption process of K-AZVI for Cd(II) conformed to the pseudo-second-order kinetic model, and it showed great potential for the remediation of Cd(II) in water.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Environmental Sciences
Jian Pan, Mengqian Qian, Yu Li, Haiqiang Wang, Baohong Guan
Summary: Metal-free catalysts play a crucial role in water treatment by effectively removing harmful quinoline derivatives and reducing chemical oxygen demand. This study demonstrates the use of fluorinated ceramic honeycomb as a catalyst for stable catalytic ozonation, generating free reactive oxygen species and efficiently degrading the target compound.
Article
Environmental Sciences
Jian Pan, Mengqian Qian, Yu Li, Haiqiang Wang, Baohong Guan
Summary: A metal-free catalyst, fluorinated ceramic honeycomb, was prepared to catalyze the ozonation of 4-methylquinoline with high efficiency in degrading and removing COD. The catalyst surface contains abundant active acid sites, enhancing the ozone decomposition to generate reactive oxygen species, with free hydroxyl radicals playing a major role in the degradation and COD removal of 4-Meq.
Article
Environmental Sciences
L. Jothinathan, Q. Q. Cai, S. L. Ong, J. Y. Hu
Summary: The combined microbubble-catalytic ozonation process (M-O-3/Fe/GAC) was found to significantly enhance the efficiency of ozonation in petrochemical wastewater treatment, achieving a COD removal efficiency of 88% and a reduction of phenolic compounds by 63% within 15 minutes.
