Article
Chemistry, Multidisciplinary
Dajie Zhang, Jiabao Sun, Qiang Li, Haocheng Song, Dongsheng Xia
Summary: The study found that Cu-doped deactivated magnetic loofah biochar can serve as a peroxymonosulfate (PMS) activator to effectively remove tetracycline. The catalyst exhibits high efficiency and stability, and can be used in a wide pH range and in the presence of coexisting anions. The research also provides insight into the possible degradation mechanism and reusing waste biochar catalysts.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Environmental Sciences
Sheng Xiong, Hao Zeng, Yaocheng Deng, Rongdi Tang, Jiajia Wang, Ling Li, Zhanpeng Zhou, Daoxin Gong
Summary: This study demonstrated that Enteromorpha biochar with introduced iron could efficiently activate peroxymonosulfate for NTP remediation. The adsorption capacity of the biochar improved due to the synergistic relationship between internal Fe single atoms and introduced Fe compounds-Fe3C. The quenching experiment confirmed that O-1(2) was the main active substance in NTP degradation, and the SFB900-3/PMS system showed stable and efficient activity for NTP removal.
Article
Engineering, Environmental
Xiaoqian Peng, Yingyi Li, Kairuo Zhu, Qingda An, Jingai Hao, Zuoyi Xiao, Xiaoling Dong, Shangru Zhai
Summary: The utilization of low-cost and high-performance biochar catalysts is crucial for the detoxification of organic wastewater and the resource utilization of algal biomass. This study developed CoSx-containing biochar catalysts using Porphyra as a raw material and demonstrated their enhanced degradation efficiency for carbamazepine through peroxymonosulfate activation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Zhuoqian Li, Kai Li, Shuanglong Ma, Bingjun Dang, Yi Li, Haichao Fu, Jinge Du, Qingxiang Meng
Summary: A convenient and efficient method for fabricating isolated Fe single-atom catalysts (ISA-Fe/MC) on Myriophyllum aquaticum-based biochar was reported for peroxymonosulfate-based organics degradation. Compared to Fe nanoparticles anchored on biochar, ISA-Fe/MC demonstrated better catalytic performance for phenol degradation, attributed to its unique structure and atomically dispersed Fe species facilitating electron transfer for activation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Environmental Sciences
Jiangtao Shi, Boren Dai, Xianbao Shen, Lijie Xu, Ying Zhang, Lu Gan
Summary: Iron compound incorporated N-doped biochar composite catalyst was prepared for bisphenol A degradation through peroxymonosulfate activation. The catalyst showed excellent performance and recyclability, providing a new solution for the design of iron-based catalyst/PMS system for organic pollutant degradations.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Chunyu Du, Shengjiong Yang, Dahu Ding, Tianming Cai, Rongzhi Chen
Summary: This study uncovered the synergistic effect between biochar and soil active minerals in the activation of peroxymonosulfate (PMS). The mineral-biochar composites exhibited notable synergistic effects in BPA removal, possibly due to the improvement in electron transfer mechanism.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Quanyun Ye, Jiayan Wu, Pingxiao Wu, Saeed Rehman, Zubair Ahmed, Nengwu Zhu
Summary: Efficient and low-cost catalysts for peroxymonosulfate (PMS) activation are essential for pollution prevention and environmental remediation. In this study, biochar (BC) was composited with CoFe layered double hydroxide (CoFe-LDH) to achieve enhanced PMS activation. The synergistic effect between BC and CoFe-LDH resulted in improved catalytic activity and stability, leading to higher production of reactive oxygen species (ROS) in the BC-LDH/PMS system. The degradation efficiency of dimethyl phthalate (DMP) was significantly higher in the BC-LDH/PMS system compared to the CoFe-LDH/PMS system, reaching 100% within 60 minutes.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Qiaofeng Hong, Chao Liu, Zhenbei Wang, Ruoyu Li, Xiaoliang Liang, Yiping Wang, Yuting Zhang, Zilong Song, Zhihui Xiao, Tingyu Cui, Beibei Heng, Bingbing Xu, Fei Qi, Amir Ikhlaq
Summary: A highly active mediator (MFB) based on FeS@biochar was prepared for peroxymonosulfate (PMS) activation, showing excellent performance in degrading 2,4-D pesticides with enhanced lifetime. The optimized reaction parameters were determined, and a novel kinetics model was proposed for describing the interfacial adsorption and catalytic reaction process accurately. The study also highlighted the inhibitory effects of pH and coexisting anions on 2,4-D degradation, providing a promising approach for designing high-performance mediators in environmental remediation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
De-hai Ping, Hao Chen, Hongping Xiang
Summary: The cementite θ-Fe3C in carbon steel contributes to its strength and hardness. Recent experiments have shown that the fine ω-Fe3C particles can transform into θ'-Fe3C and then into θ-Fe3C, suggesting a new transformation mechanism.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Engineering, Environmental
Leijiang Zhang, Bianna Wang, Wenjie Ma, Bing Li, Yonglei Liu, Yunchen Du
Summary: The design of heterogeneous catalysts is crucial for advanced oxidation processes in wastewater treatment. Fe3C/Fe nanoparticles and N-doped carbon frameworks are found to activate PMS for efficient removal of BPA. The catalytic performance of Fe3C/Fe@NCFs is influenced by the pyrolysis temperature, with moderate temperature (700 degrees C) producing the highest BPA removal efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Catia Liane Ucker, Francielen San Martins Rodrigues, Renato de Gouveia Cantoneiro, Vitor Goetzke, Eduardo Ceretta Moreira, Mateus Meneghetti Ferrer, Cristiane Wienke Raubach, Sergio Cava
Summary: This work presents a simple and fast method to synthesize a photocatalytic support based on a loofah sponge, which has a high capacity for photocatalytic discoloration of rhodamine B dye. The loofah sponge impregnated with Nb2O5 at lower temperatures (120 and 130 degrees C) showed complete discoloration of rhodamine B in a short time interval (20 min) in the photocatalytic process. The photocatalytic support stands out for its low cost, high performance, availability, and environmental friendliness.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Environmental Sciences
Jie Li, Hua Yin, Haoyu Luo, Yingchao Li, Xufa Rong, Zhi Dang
Summary: In this study, the synergistic action of O2- and 1O2 produced by PMS activation was successfully utilized to degrade PCB 28. The important role of Fe3C in generating O2- and 1O2 for PCB 28 decontamination was clarified, providing insights for the design of catalysts in polychlorinated biphenyl pollution remediation.
Article
Engineering, Environmental
Fawen Liang, Zhang Liu, Xueding Jiang, Jiesen Li, Kaibang Xiao, Weicheng Xu, Xin Chen, Jinzhi Liang, Zhifeng Lin, Meng Li, Xiaolian Wu, Hailong Wang
Summary: In this study, a NaOH-modified biochar supported Fe/Mn bimetallic composite (Fe-Mn/AW-BC) was prepared to remove tetracycline (TC) through activating peroxymonosulfate (PMS). The results showed that Fe-Mn/AW-BC + PMS system had a rate constant 37 times higher than the BC + PMS system, with about 97.9% of TC degraded. The Fe-Mn/AW-BC system exhibited wide pH usability and broad-spectrum adaptability towards various organic pollutants and water environments.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jiangwei Shang, Shuwen Fan, Shihu Cao, Xinrui Gan, Jing Nie, Tianning Zhang, Xiangchen Li, Dan Feng, Xiuwen Cheng
Summary: In this study, a CuCo2S4 microporous composite membrane (CCSM) was prepared and used to activate PMS for the degradation of carbamazepine (CBZ). The CCSM/PMS system exhibited admirable catalytic performance, efficiently degrading CBZ and other antibiotics. Furthermore, the CCSM showed good recyclability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Yihui Li, Deying Lin, Yongfu Li, Peikun Jiang, Xiaobo Fang, Bing Yu
Summary: In this study, bimetallic Fe/Mn-loaded hydroxyl-rich biochar (FeMn-OH-BC) is synthesized to activate peroxymonosulfate (PMS) through nonradical-dominated pathways for degrading organic pollutants. The FeMn-OH-BC exhibits excellent catalytic activity at a wide range of pH conditions and is not inhibited by various anions. Electron paramagnetic resonance measurements and quenching tests confirm that O-1(2) is the major reactive oxygen species generated from FeMn-OH-BC based PMS activation.
Review
Engineering, Environmental
Zhongjuan Wang, Ye Du, Peng Zhou, Zhaokun Xiong, Chuanshu He, Yang Liu, Heng Zhang, Gang Yao, Bo Lai
Summary: Low Fe(II) generation is the main limitation for Fenton process, and providing electrons is the solution to promote Fe(III) reduction. This study systematically reviewed the strategies for enhancing Fe(III)/Fe(II) cycle based on electron donors, which can be classified into five categories: e-PF, e-EF, e-Re, e-Ox, and e-TC. The principles and mechanisms of each enhanced Fenton process were clarified, and the role of chelate agents and carbon-based materials were discussed. Among them, e-Re showed the best performance in pollutant degradation, making it the most promising approach. The development of reductants for future practical application is necessary.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Minxian Cheng, Yichu Zhang, Bo Lai, Lingzhen Wang, Shengjiong Yang, Kailong Li, Dongqi Wang, Yaoguo Wu, Guang-Hao Chen, Jin Qian
Summary: Nitrogen and phosphorus co-doped porous carbons were synthesized and their excellent degradation ability to tetracycline was observed. Electron transfer mediated by metastable reactive complexes and singlet oxygen played a key role in the degradation process. The introduction of phosphorus promoted the adsorption and activation of peroxydisulfate, leading to high-efficiency removal of contaminants.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Min Wang, Yiwu Tang, Jiadian Wang, Zhenqi Xu, Qing Dong, Taizhuo Ma, Bo Lai
Summary: This study prepared a nitrogen-doped carbon-embedded iron on a nickel foam cathode for the activation of peroxydisulfate for organic pollutant degradation. The optimized cathode showed excellent removal efficiency for sulfamethoxazole, with almost 100% removal achieved in 15 minutes. The study also provided valuable insights into the catalytic active sites of the cathode for PDS activation.
CHEMICAL ENGINEERING JOURNAL
(2023)
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
Engineering, Environmental
Yuchen Zhang, Peng Zhou, Rongfu Huang, Chenying Zhou, Yang Liu, Heng Zhang, Xiaowei Huo, Jian Zhao, Zhaokun Xiong, Bo Lai
Summary: In this study, iron boride (FeB) was proposed as a new material to sustainably decompose H2O2 to generate hydroxyl radicals, which can degrade refractory organic pollutants. Fe(II) was steadily released by the oxidation of FeB, and B-B bonds on the surface of FeB promoted the regeneration of Fe(II) from Fe(III) and accelerated the production of hydroxyl radicals. The FeB/H2O2 system showed low generation of toxic by-products and high utilization rate of iron species, providing a green and long-lasting environmental remediation strategy.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Lili Ma, Jieyu Xu, Yucheng Liu, Yongtao An, Zhicheng Pan, Bing Yang, Lingli Li, Ting Hu, Bo Lai
Summary: In this study, a bimetallic organic framework doped with Cu was fabricated and used as a catalyst for the degradation of tetracycline through the combined process of visible-light photocatalysis and persulfate oxidation. The results showed that the Cu-doped framework significantly improved the degradation efficiency of tetracycline under certain operating conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Lingli Li, Qi Liao, Bingchao Hou, Chuanshu He, Jiamei Liu, Bingrui Li, Ming Yu, Yucheng Liu, Bo Lai, Bing Yang
Summary: A functionalized magnetic chitosan beads (MCB-ECH-SH/SO3H) was found to efficiently remove hexavalent chromium (Cr(VI)) from wastewater by reducing it to less toxic trivalent chromium (Cr(III)). The material also exhibited high stability, strong reducing capacity, easy recycling, making it an ideal candidate for treating chromium-containing wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jiali Peng, Peng Zhou, Hongyu Zhou, Bingkun Huang, Minglu Sun, Chuan-Shu He, Heng Zhang, Zhimin Ao, Wen Liu, Bo Lai
Summary: The mechanism of carbon nanotubes (CNTs)-driven periodate (PI) activation for the oxidation of phenols was investigated. It was found that CNTs can strongly boost PI activation by forming high-potential metastable intermediates (CNTs-PI*). The adsorption of phenols on CNT surfaces and the electronic properties of CNTs play critical roles in the oxidation process.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zelin Wu, Bingkun Huang, Xinhao Wang, Chuan-Shu He, Yang Liu, Ye Du, Wen Liu, Zhaokun Xiong, Bo Lai
Summary: The catalytic activity of Fe-NxC4-x sites with different coordination environments was predicted through theoretical calculations. Substituting N with C to coordinate with Fe atom resulted in inferior Fenton-like catalytic efficiency. Three configurations of Fe-SACs (Fe-N2C2, Fe-N3C1, and Fe-N4) were fabricated and showed that optimized Fe-NxC4-x coordination environments significantly promoted Fenton-like catalytic activity. The coordination dependency of Fe-SACs was also observed in terms of catalytic stability and actual hospital sewage treatment capacity. This strategy of local coordination engineering provides an example of how to modulate SACs with well-regulated coordination environments to maximize their catalytic efficiency.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Bingkun Huang, Xinyi Ren, Jian Zhao, Zelin Wu, Xinhao Wang, Xinyu Song, Xuning Li, Bin Liu, Zhaokun Xiong, Bo Lai
Summary: This study reports the functional group modification of model single atom catalysts (SACs) to improve the catalytic performance in Fenton-like reactions. The modified cobalt phthalocyanine catalyst exhibited superior catalytic activity and the mechanism was revealed through density functional theory (DFT) calculations. Scale-up experiments also demonstrated the stability and efficiency of the catalyst.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Bingkun Huang, Zelin Wu, Xinhao Wang, Xinyu Song, Hongyu Zhou, Heng Zhang, Peng Zhou, Wen Liu, Zhaokun Xiong, Bo Lai
Summary: This study proposes a novel peroxymonosulfate (PMS) activation system that utilizes the surface-confinement effect to accelerate the catalytic oxidation process. The generation of high-valent iron-oxo species is confirmed through experiments, and the surface-confinement effect is shown to enhance the charge transfer rate and reduce the free energy barrier for PMS activation. The system exhibits excellent pollutant degradation efficiency, resistance to coexisting matter, and adaptability to a wide pH range and temperature environments.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Liwei Yang, Chao Hai, Heng Zhang, Can Feng, Mengfan Luo, Peng Zhou, Juntong Leng, Xinyuan Tian, Chuanliang Zhao, Bo Lai
Summary: This study investigated the degradation of methyl parathion using potassium ferrate. It was found that potassium ferrate has strong oxidation and adsorption abilities, and can completely degrade methyl parathion within a short period of time. Three conversion pathways of methyl parathion were proposed based on the identified by-products, and the toxicity of potassium ferrate-degraded methyl parathion was significantly reduced.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Peishan Li, Hui Ma, Sijia Qian, Yi Chen, Bo Lai, Shengyan Pu
Summary: In this study, nFeS was modified with sodium carboxymethyl cellulose (CMC) to improve its stability and catalytic reactivity. The CMC-nFeS activator showed a higher reaction rate constant and better removal efficiency of p-nitrophenol compared to pure nFeS.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Rongrong Ding, Guannan Zhou, Chuanshu He, Wenqiang Li, Yiran Wang, Xiaocheng Liu, Bo Lai, Yang Mu
Summary: This study highlights the influence of coexisting heavy metals on the degradation of contaminants during FeS oxygenation. The introduction of Co2+ and Ni2+ significantly enhances the degradation of bisphenol A by increasing the generation of reactive species.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
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)
