检索结果-内蒙古大学图书馆

Spatial Confinement-Regulated Peroxymonosulfate Activation by Hollow Bimetallic Metal-Doped Carbon Spheres for Rapid Removal of Organic Pollutants

学校读者我要写书评

暂无评论

SSRN 2024年

作者： Li, Huanxuan Zhang, Xuhong Xu, Shaodan Zhou, Zhong Rao, Tao Huang, Jingang Wang, Chunhui Gao, Xing College of Materials and Environmental Engineering Hangzhou Dianzi University Hangzhou310018 China China Aerospace Planning and Design Group Co. Ltd. Zhejiang Branch Hangzhou310000 China Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control CAS Haixi Industrial Technology Innovation Center in Beilun Ningbo315830 China

Non-radical advanced oxidation processes (AOPs) are increasingly recognized as an appealing alternative for the removal of persistent contaminants from water, effectively mitigating the impact of coexisting anions compared to traditional radical-based methods. Here, a singlet oxygen (1O2)-dominated process was developed for the degradation of metronidazole (MNZ), with hollow bimetallic metal-doped carbon spheres (CuCo-HCS) as catalysts and peroxymonosulfate (PMS) as oxidant. Experimental results indicated that 1O2 is the primary reactive species, with the hollow bimetallic doped carbon spheres promoting electron transfer processes and enhancing surface interactions through spatial confinement, while also regenerating Co(II) and Cu(I). This ultimately boosted the generation of 1O2 and the degradation of MNZ. The CuCo-HCS-4/PMS system achieves a 100% removal rate of MNZ within 5 minutes and a 70% mineralization rate within 30 minutes, with degradation rates 1.4-fold and 10-fold higher than those of the Co-HCS-4/PMS and Cu-HCS-4/PMS systems, respectively. CuCo-HCS-4 demonstrates excellent PMS utilization efficiency, good stability, and strong resistance to inorganic anions. This study provides new strategies and insights for the design of novel hollow catalysts and the mechanistic exploration of non-radical AOP pathways. © 2024, The Authors. All rights reserved.

关键词：

Low-Cost Separator with Dust-Free Fabric Composite Cellulose Acetate Toward Stable Dendrite-Free Aqueous Zinc-Ion Batteries

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Lei, Yusheng Li, Qingning Liu, Qifan Zeng, Yanfei Li, Jia Huang, Wei Wang, Feisheng Zhong, Shengkui Yan, Dongliang Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin541004 China Guangxi Colleges Universities Key Laboratory of Environmental-friendly Materials and New Technology for Carbon Neutralization Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization School of Materials and Environment Guangxi Minzu University Nanning530105 China Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming650093 China College of Marine Science & Technology Hainan Tropical Ocean University Sanya572022 China

At present, the commonly used glass fiber (GF) separators in AZIBs possess many defects, such as lack zinophilic active sites, low electrical conductivity, poor mechanical strength, and high cost, which leading to the growth of dendrites and cause short circuits, thus resulting in deteriorated cyclic life. Herein, a novel CA@DF separator has been developed by coating molten blend of cellulose acetate (CA) and polyvinylidene fluoride (PVDF) on commercial dust-free fabric (DF) substrate and subsequent phase inversion. Due to the large number of active sites provided by the zinophilic -OH group derived from CA, more the nucleation sites of Zn2+ are offered by the as-obtained CA@DF separator, which leads to an uniform deposition of Zn2+ of preferred (002) crystallographic orientation. Furthermore, as-obtained CA@DF separator demonstrate not only high tensile strength of 23.08 MPa, which is 51 times of the GF separator but also improved Zn2+ migration number (τ) (0.58 for CA@DF vs. 0.31 for GF). Moreover, the CA@DF separator has cost with only 1/221 cost of GF separator. Impressively, the symmetric cell equipped with the CA@DF separator displays an ultralong lifespan of over 2000 h at 0.5 mA cm-2 and 1000 h at 3 mA cm-2. Specifically, the CA@DF separator also improves the cycling stability of the Zn//V2O5 cell with a reversible capacity of 78 mAh g-1 at 1A g-1 after 1000 cycles. This simple, reliable, and low-cost separator provides new insights into the design and industrial production of electrochemical energy storage device separators. © 2023, The Authors. All rights reserved.

关键词： Separators

Effect of Tb on CuFe2O4 coatings for solid oxide fuel cell interconnect applications

学校读者我要写书评

暂无评论

Ceramics International 2025年

作者： Pan, Yue Wang, Jian Jiang, Luxuan Wang, Ruixiang Xu, Zhifeng School of Metallurgical Engineering Jiangxi University of Science and Technology Ganzhou341000 China Jiangxi Provincial Key Laboratory of Green and Low Carbon Metallurgy for Strategic Nonferrous Metals Jiangxi University of Science and Technology Ganzhou341000 China Ganzhou Engineering Technology Research Center of Green Metallurgy and Process Intensification Ganzhou341000 China Jiangxi College of Applied Technology Ganzhou341000 China Key Laboratory of Ionic Rare Earth Resources and Environment Ministry of Natural Resources Ganzhou341000 China

To investigate the Tb effect on CuFe2O4 coating for steel interconnect, a series of CuTbxFe2-xO4 (x = 0, 0.02, 0.06, 0.10) powder materials are prepared. The CuFe2O4 and CuTb0.02Fe1.98O4 coatings are then deposited on pre-oxidized steels, followed by oxidation at 800 °C in air for 600 h. It is confirmed that the CuTb0.02Fe1.98O4 displays a tetragonal spinel phase, while the Tb dopant decreases electrical conductivity in compared to CuFe2O4. For the coated samples, the Tb dopant is beneficial to reducing both the oxidation rate and the area-specific resistance of coated steel, relating to maintaining a continuous chromia layer that inhibits the outward diffusion of Fe and Cr to the coating layer. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Diffusion coatings

Composite Material Derived from Zif-67 with Biochar Promotes Ozonation of 4-Nitrophenol

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Ren, Mingzhu Wang, Fuxue Zhang, Jiang Wang, Chong-Chen Wang, Kui Zhang, Jianbo Wang, Zhou-Jun Xie, Yongbing State Key Laboratory of Vanadium Titanium Resources Comprehensive Utilization Pangang Group Research Institute Co. Ltd. Panzhihua617000 China Chemistry & Chemical Engineering Data Center Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation Beijing University of Civil Engineering and Architecture Beijing100044 China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing100029 China

Cobalt 2-methylimidazole (ZIF-67) have abundant nitrogen and cobalt elements, which can be used as an excellent precursor for catalyst synthesis. In this study, a new Co, N co-doped carbon-based catalyst (Co-N-BC) was synthesized from ZIF-67 and biochar, which can significantly improve the degradation of 4-nitrophenol (4-NP) in catalytic ozonation. The mineralization rate of 4-NP achieves 65.8% within 60 min. The catalyst showed high recycling stability in the 4 cycles of reuse experiment. Different operating parameters, such as solution pH, the concentration of O3 and 4-NP, have been studied in Co-N-BC catalytic ozonation. O3, O2–· and ·OH are determined as the main reactive species for 4-NP degradation. The existence of inorganic ions, such as Cl-, NO2-, CO32- and PO43-, all significantly inhibited the degradation of 4-NP to different extend, respectively. The effect of substituent on a series of organics with similar structure of 4-NP was also investigated in Co-N-BC catalytic ozonation. This study provides a new composite material Co-N-BC for heterogeneous catalytic ozonation, which is very promising in 4-NP contained complex wastewater treatment. © 2023, The Authors. All rights reserved.

关键词： Cobalt

Exploring Polystyrene Weathering Behavior: From Surface Traits to Micro(Nano)Plastics and Additives Release

学校读者我要写书评

暂无评论

SSRN 2024年

作者： Yang, Nina Zuo, Jiane Men, Cong Zhang, Yanyan Xie, Zhenwen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Shenzhen International Graduate School Tsinghua University Shenzhen518055 China School of Energy and Environmental Engineering Beijing Key Laboratory of Resource-Oriented Treatment of Industrialpollutants University of Science and Technology Beijing Beijing100083 China Chengdu Xingrong Environment Co. Ltd Chengdu610041 China Chengdu Drainage Co. Ltd Chengdu610011 China

Plastic weathering in the natural environment is a dynamic and complex process, where the release of micro and nanoplastics, as well as additives, poses potential threats to ecosystems. Current research primarily focuses on the singular weathering actions of plastics;however, the release of micro and nanoplastics alongside additives often occurs concurrently under natural conditions. This study systematically explored these phenomena by exposing polystyrene (PS) to UV irradiation and mechanical agitation for different durations (1 day, 5 days, 10 days, 20 days). The results indicated a progressive increase in both the extent of polystyrene (PS) ageing and the abundance of carbonyl (C=O) functional groups throughout the weathering process. Notably, flake bulges and cracks emerged as characteristic features of PS weathering. A positive correlation was identified between the released micro(nano)plastics content and the extent of plastic ageing. Laser infrared and Raman tests indicated that microplastics originating from polystyrene (PS) within the 10-20 μm size range accounted for the largest fraction over time and remained relatively stable. Simultaneously, the proportions of 20 μm microplastics consistently approached parity, gradually increasing. In the later stage, the proportions of all three tended to equalize. The dominant size range of nanoplastics shifted towards smaller sizes over time, albeit with a certain limit. Twenty types of chemicals were detected, including bisphenol A (BPA), dibutyl phthalate (DBP) and Di(2-ethylhexyl) phthalate (DEHP), with antioxidant 168 showing the highest content. The release of plastic additives was influenced by a combination of ageing time, additive type, and quantity. This study provided a comprehensive overview of the plastic weathering process and practical information for managing plastic pollution in rivers. © 2024, The Authors. All rights reserved.

关键词： Polystyrenes

Evolution of Polystyrene in Simulated River: Micro(Nano)Plastics Generation and Plastic Additives Release

学校读者我要写书评

暂无评论

SSRN 2024年

In rivers, the release of micro(nano)plastics and additives resulting from plastic weathering pose significant environmental threats. However, systematic research on the weathering behaviors of plastics mentioned above is still limited. This study systematically explored these phenomena by exposing PS to UV irradiation and mechanical agitation for different durations (1 day, 5 days, 10 days, 20 days). The degree of ageing and the abundance of carbonyl (C=O) functional groups in polystyrene (PS) gradually increased with time. Notably, flake bulges and cracks emerged as characteristic features of PS ageing. A positive correlation was identified between the released micro(nano)plastics content and the extent of plastic ageing. The 10-20 μm size range accounted for the largest fraction over time and remained relatively stable. Simultaneously, the proportions of 20 μm microplastics gradually increasd, and eventually the proportions of all three tended to equalize. The dominant size range of nanoplastics shifted towards smaller sizes over time, albeit with a certain limit. Twenty types of chemicals were detected, including bisphenol A (BPA), dibutyl phthalate (DBP) and Di(2-ethylhexyl) phthalate (DEHP), with antioxidant 168 showing the highest content. The release of plastic additives was influenced by a combination of ageing time, additive type, and quantity. © 2024, The Authors. All rights reserved.

关键词： Polystyrenes

Quantifying the pollution changes and meteorological dependence of airborne trace elements coupling source apportionment and machine learning

学校读者我要写书评

暂无评论

Science of the Total environment 2024年 948卷 174452页

作者： Wang, Haolin Guan, Xu Li, Jiao Peng, Yanbo Wang, Guoqiang Zhang, Qingzhu Li, Tianshuai Wang, Xinfeng Meng, Qingpeng Chen, Jiaqi Zhao, Min Wang, Qiao Academician Workstation for Big Data Research in Ecology and Environment Environmental Research Institute Shandong University Qingdao266237 China Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation Shandong Academy for Environmental Planning Jinan250101 China Shandong Tianve Engineering Technology Co. LTD China

Airborne trace elements (TEs) present in atmospheric fine particulate matter (PM2.5) exert notable threats to human health and ecosystems. To explore the impact of meteorological conditions on shaping the pollution characteristics of TEs and the associated health risks, we quantified the variations in pollution characteristics and health risks of TEs due to meteorological impacts using weather normalization and health risk assessment models, and analyzed the source-specific contributions and potential sources of primary TEs affecting health risks using source apportionment approaches at four sites in Shandong Province from September to December 2021. Our results indicated that TEs experience dual effects from meteorological conditions, with a tendency towards higher TE concentrations and related health risks during polluted period, while the opposite occurred during clean period. The total non-carcinogenic and carcinogenic risks of TEs during polluted period increased approximately by factors of 0.53–1.74 and 0.44–1.92, respectively. Selenium (Se), manganese (Mn), and lead (Pb) were found to be the most meteorologically influenced TEs, while chromium (Cr) and manganese (Mn) were identified as the dominant TEs posing health risks. Enhanced emissions of multiple sources for Cr and Mn were found during polluted period. Depending on specific wind speeds, industrialized and urbanized centers, as well as nearby road dusts, could be key sources for TEs. This study suggested that attentions should be paid to not only the TEs from primary emissions but also the meteorology impact on TEs especially during pollution episodes to reduce health risks in the future. © 2024 Elsevier B.V.

关键词： Health risks

Fate of Cd during mineral transformation by sulfate-reducing bacteria in clay-size fractions from soils with high geochemical background

学校读者我要写书评

暂无评论

Journal of Hazardous Materials 2023年第1期459卷 132213页

作者： Yan, Xing Guan, Dong-Xing Li, Jie Song, Yinxian Tao, Hua Zhang, Xianming Ma, Ming Ji, Junfeng Zhao, Wancang Chongqing Key Laboratory of Karst Environment School of Geographical Sciences Southwest University Chongqing400715 China Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment Institute of Soil and Water Resources and Environmental Science College of Environmental and Resource Sciences Zhejiang University Hangzhou310058 China College of Resources and Environment Southwest University Chongqing400715 China Department of Geosciences Faculty of Land Resource Engineering Kunming University of Science and Technology Yunnan Province Kunming650093 China Chongqing Geological and Mineral Resource Exploration and Development Bureau 607 Geological Team Chongqing401120 China Key Laboratory of Surficial Geochemistry Ministry of Education School of Earth Sciences and Engineering Nanjing University Nanjing210093 China

Sulfate-reducing bacteria (SRB) can immobilize heavy metals in soils through biomineralization, and the parent rock and minerals in the soil are critical to the immobilization efficiency of SRB. To date, there is little knowledge about the fate of Cd associated with the parent rocks and minerals of soil during Cd immobilized by SRB. In this study, we created a model system using clay-size fraction of soil and SRB to explore the role of SRB in immobilizing Cd in soils from stratigraphic successions with high geochemical background. In the system, clay-size fractions (particle size -OX) and the crystalline iron oxide (Fe-CBD), were separated by extraction. The reaction of SRB with them verified the transformation of primary iron-bearing minerals into secondary iron-bearing minerals, which contributed to Cd redistribution. This study shows that SRB could exploit the composition and structure of minerals to induce mineral recrystallization, thereby aggravating Cd redistribution and immobilization in clay-size fractions from stratigraphic successions with high geochemical background. © 2023 Elsevier B.V.

关键词： Iron oxides

Modified Peck method of evaluating tunnelling-induced ground movements based on measured data

学校读者我要写书评

暂无评论

Arabian Journal of Geosciences 2022年第9期15卷 1-26页

作者： Zhang, Zhiguo Chen, Jie Zhang, Mengxi Yang, Xuan School of Environment and Architecture University of Shanghai for Science and Technology Shanghai China Key Laboratory of Geohazard Prevention of Hilly Mountains (Ministry of Natural Resources) Fujian Key Laboratory of Geohazard Prevention Fuzhou China Department of Civil and Environmental Engineering National University of Singapore Singapore Singapore Department of Civil Engineering Shanghai University Shanghai China

The precise prediction of ground settlement troughs due to underground tunnelling is of great significance in geotechnical design. The traditional approaches for ground movements are mostly established in individual or underabundant cases. It is necessary to further modify the traditional methods to make them more widely applicable. In this study, two modified Peck formulas of settlement trough width parameters for surface and subsurface ground caused by tunnel excavation are proposed respectively by the numerous measured data from the field projects and model tests. Firstly, the modified fitting formula of width parameter is for surface settlement trough is obtained based on the data from 11 field cases, which can capture the main parameters, including the tunnel radius R, tunnel depth h, and soil physical characters (such as, internal friction angle φ). Additionally, 3 sets of measured surface settlement data from 2 field cases are selected and compared with the results calculated by the proposed formula. Then, by analyzing the measured settlement data from 22 field cases and 2 model tests statistically, the modified formula of subsurface settlement trough width parameter $${i}_{z}$$ is proposed and verified by 4 sets of measured data from 2 projects. Finally, to check the overall applicability of the proposed formulas, the surface and subsurface settlements at different depths in 3 field cases and a model test are calculated and compared with the measured data. The results show that the ground settlements calculated by the proposed modified formulas are in good agreements with field measurements.

关键词：