Article
Engineering, Environmental
Jiakai Qiu, Jing Wang, Mingzhu Ren, Xin Yang, Jianbo Zhang, Xiaolong Zhang, Hongbin Cao, Yongbing Xie
Summary: This paper investigated the effect of chloride ion (Cl-) on the degradation of organic compounds. It was found that Cl- affects the degradation by transforming center dot OH to reactive chlorine species (RCS). The competition between organics and Cl- for center dot OH determines their consumption rate, which depends on their concentration and reactivity. The study also showed that Cl center dot had no significant contribution to the degradation of organics, possibly due to its reaction with ozone.
Article
Environmental Sciences
Shuning Chen, Tengfei Ren, Xiaoying Zhang, Zuoyong Zhou, Xia Huang, Xiaoyuan Zhang
Summary: In this study, Mn-loaded C-SiO2-Framework (Mn-CSF) was proposed for efficient catalytic ozonation. The results showed that Mn-CSF exhibited significantly enhanced catalytic activity compared to Mn-SiO2 and pristine CSF. Mn-CSF also proved to be effective in gasification wastewater treatment. Additionally, Mn-CSF catalytic ozonation showed better removal of fulvic-like and protein-like components compared to ozonation. The study provided evidence of the relationship between catalyst structure and heterogeneous catalytic ozonation efficiency.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Prodyut Roy, Anup Pramanik, Pranab Sarkar
Summary: This study demonstrates that doping a single silicon atom on the surface of porous graphitic carbon nitride can serve as an efficient photocatalyst for oxygen reduction reaction (ORR) with a low onset potential. The dopant atom activates molecular oxygen adsorbed on the surface and facilitates its reduction via a four-electron transfer pathway. This metal-free photocathode system shows great potential for use in fuel cells.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Dongyang He, Hao Yang, Dexin Jin, Jiao Qu, Xing Yuan, Ya-nan Zhang, Mingxin Huo, Willie J. G. M. Peijnenburg
Summary: Research demonstrates that by tuning reaction parameters, the synthesized g-C3N4 can achieve extremely high photocatalytic activity, outperforming P25 TiO2 and other g-C3N4-based nanocomposites with lower catalyst consumption, and requiring only short ultrasonic pretreatment for excellent performance.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Bao Pan, Mingbao Feng, Jiani Qin, Afzal Ahmed Dar, Chuanyi Wang, Xingmao Ma, Virender K. Sharma
Summary: This study investigated the visible light-induced oxidation of micropollutants using g-C3N4 photocatalyst and ferrate(VI) under mild alkaline conditions. The results showed enhanced oxidation of micropollutants by the combined system compared to using g-C3N4 or ferrate(VI) alone, providing a new advanced oxidation process for efficient degradation of micropollutants in water.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Wei Zhang, Shaoze Zhang, Chenchen Meng, Zhenghua Zhang
Summary: Sulfate radical-based advanced oxidation processes (SR-AOPs) are an efficient method for removing organic pollutants in water bodies. A novel cobalt-functionalized graphitic carbon nitride (Co@g-C3N4) membrane has been designed and prepared for the first time, which can activate peroxymonosulfate (PMS) to degrade pollutants and maintain stability during long-term operation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
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
Engineering, Environmental
V. Lakshmi Prasanna, Igal Gozlan, Vinod Kumar Vadivel, Koral Braylowski, Dror Avisar
Summary: This study investigated the catalytic ozonation of ZnO2, finding that the catalyst enhanced the degradation of micropollutants under ozone. The ZnO2/O3 system achieved significant degradation of CYP, with a 99% degradation rate compared to only 17% with ozone alone.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Shuxuan Feng, Chu Dai, Yunjie Huang, Guiqiu Wu, Yulun Nie, Xike Tian
Summary: This study investigates the potential of boron nitride as a catalyst for the ozonation of ketoprofen. Defective boron nitride was synthesized through the calcination of boric acid and melamine and characterized using various techniques. The catalytic system with boron nitride displayed significantly higher apparent rate constants and removal efficiency of chemical oxygen demand compared to ozonation alone at pH 7. Acidic B-OH species were identified as the active sites, originating from manufacturing defects during preparation.
CATALYSIS COMMUNICATIONS
(2023)
Article
Engineering, Environmental
Haoyang Sun, Nan Jiang, Guanglin Yu, Jie Li
Summary: In this study, Fe/g-C3N4 was prepared and used to enhance the plasma oxidation of acetaminophen. Superoxide anion was identified as the primary derivative species, and singlet oxygen derived from superoxide anion was involved in the degradation of acetaminophen, along with the generation of additional hydrogen peroxide. The degradation pathways of acetaminophen and optical emission were proposed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Xinghao Liu, Zhaoguang Yang, Wenxiu Zhu, Ying Yang, Haipu Li
Summary: This study established a heterogeneous catalytic ozonation chemical kinetic model, with good correlation between experimentally measured and model-predicted removal ratios, allowing for satisfactory prediction of pollutant degradation rates.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Spectroscopy
Xiaotao Liu, Shanshan Xing, Yuanteng Xu, Ruiqing Chen, Chang Lin, Liangqia Guo
Summary: The addition of nitrogen-rich triazole group into the g-C3N4 motif significantly enhances the light absorption of g-C3N5 NSs, leading to higher efficiency of visible-light utilization. In vitro anticancer studies demonstrate the potential of g-C3N5 NSs as a low-toxic and biocompatible high-efficient photosensitizer for PDT.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Engineering, Environmental
Yang Guo, Jingfei Long, Jun Huang, Gang Yu, Yujue Wang
Summary: The commonly used quenching method may not be suitable for investigating the role of ROS in pollutant abatement during catalytic ozonation, as the quenchers can interfere with the reaction mechanism.
Article
Engineering, Environmental
Yahan Yu, Chunxiu Yu, Zelin Wu, Bingkun Huang, Peng Zhou, Heng Zhang, Wen Liu, Yucheng Liu, Zhaokun Xiong, Bo Lai
Summary: In this study, an electrocatalytic ozonation (ECO) system called ECO-Fe-cathode was developed, which achieved higher degradation efficiency of pollutants compared to the ECO-Fe-anode system. The primary reactive oxygen species (ROS) in the ECO-Fe-cathode system was found to be singlet oxygen (O-1(2)), while hydroxyl radicals ((OH)-O-center dot) were the primary ROS in the ECO-Fe-anode system. This research provides a fundamental breakthrough in designing efficient and harmless ECO systems for wastewater treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Mirna Alameddine, Arno Siraki, Lusine Tonoyan, Mohamed Gamal El-Din
Summary: Powdered activated carbon (PAC) acts as a strong adsorbent and catalyst for ozonation processes in treating micropollutants. The simultaneous addition of ozone (O-3) and PAC enhances the removal and degradation rates of micropollutants, with scavenging actions of hydroxyl radicals ((OH)-O-center dot) and other reactive oxygen species. Detailed studies show that the presence of PAC does not boost the generation of free hydroxyl radicals in the decomposition of ozone at neutral pH, but rather produces adsorbed hydroxyl radicals and other oxidizing species.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)