Environmental Technology最新文献_第10页

Mechanisms of N₂ formation from zigzag configurations with different dinitrogen active sites during coal pyrolysis.

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-02-16 DOI: 10.1080/09593330.2025.2450560

Tingting Jiao, Pengzheng Shi, Jieyao Song, Xianrong Qiao, Ju Shangguan

{"title":"Mechanisms of N2 formation from zigzag configurations with different dinitrogen active sites during coal pyrolysis.","authors":"Tingting Jiao, Pengzheng Shi, Jieyao Song, Xianrong Qiao, Ju Shangguan","doi":"10.1080/09593330.2025.2450560","DOIUrl":"https://doi.org/10.1080/09593330.2025.2450560","url":null,"abstract":"To have a deep insight into the microscopic mechanism of N2 formation during coal pyrolysis, the density functional theory was employed to compute and investigate the formation path of N2. Seven-membered ring containing two pyridine nitrogen is selected as carbonaceous models. The results reveal that different dinitrogen active sites induce varied electron distribution on the surface of models. It makes varying energy barriers for the breakage of the C-N. In the pyrolysis process of R1 (two N atoms numbered 4 and 6) and R2 (two N atoms at positions 6 and 8), the energy barriers of the cleavage of the first N (the nitrogen first stripped in the structure) are 387.49 and 357.47 kJ/mol, respectively, and the energy barriers of the cleavage of the second N (the nitrogen stripped later in the structure) are 142.43 and 316.89 kJ/mol, respectively. However, different dinitrogen active sites have no effect on the main pyrolysis properties of the structure. Both of the two dinitrogen char models experienced the same process: the stripping of the first N atom and the formation of five-membered ring, the formation of dinitrogen five-membered ring, the stripping of the second N atom, the formation of C(NN) structure, N2 desorption. According to the analysis of the reaction energy barriers, dinitrogen zigzag char model to N2 is consistent with the experimental results.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-11"},"PeriodicalIF":2.2,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143432532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Portable water collection bag based on solar-driven interfacial evaporation.

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-02-16 DOI: 10.1080/09593330.2025.2462795

Ye Jia, Lingxue Kong, Tengdi Zhang, Yuping Wang, Anmin Liu, Liguo Gao, Tingli Ma

{"title":"Portable water collection bag based on solar-driven interfacial evaporation.","authors":"Ye Jia, Lingxue Kong, Tengdi Zhang, Yuping Wang, Anmin Liu, Liguo Gao, Tingli Ma","doi":"10.1080/09593330.2025.2462795","DOIUrl":"https://doi.org/10.1080/09593330.2025.2462795","url":null,"abstract":"Convenient and portable, sustained provision of safe drinking water is crucial for wilderness survival. In this study, a portable water collection bag utilising solar-driven interface evaporation technology has been developed. The water collection bag includes a plastic film, CB-PS microsphere evaporator, and a small vial. By placing on the water surface, the CB-PS microspheres float and absorb sunlight to quickly evaporate the surrounding water. The plastic film and vial make it easy and fast to collect clean and safe drinking water. The device boasts an impressive evaporation rate of 1.64 kg·m⁻²·h⁻¹ under 1 sun illumination. Moreover, the portable water collection bag can withstand harsh acidic and alkaline conditions, efficiently removing organic contaminants from wilderness water sources to meet drinking water standards. Importantly, it is designed for repeated use without any water evaporation rate decreasing. The portable water collection bag also exhibits strong resistance to salt, making it suitable for applications in desalinating seawater into freshwater.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-8"},"PeriodicalIF":2.2,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143432536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Typical heavy metals in wastewater treatment plants in Nanjing, China: perspective of abundance, removal, and microbial response.

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-02-16 DOI: 10.1080/09593330.2025.2460240

Ming Chen, Xiuwen Qian, Juan Huang, Luming Wang, Ting Lv, Yufeng Wu, Hsuan Chen

{"title":"Typical heavy metals in wastewater treatment plants in Nanjing, China: perspective of abundance, removal, and microbial response.","authors":"Ming Chen, Xiuwen Qian, Juan Huang, Luming Wang, Ting Lv, Yufeng Wu, Hsuan Chen","doi":"10.1080/09593330.2025.2460240","DOIUrl":"https://doi.org/10.1080/09593330.2025.2460240","url":null,"abstract":"Heavy metals (HMs) are hazardous contaminants with persistence and bioaccumulation, attracting widespread attention. Wastewater treatment plants (WWTPs) play vital roles in the pollution control of sewage, closely related to human health and the biological environment. Therefore, eight HMs in three typical WWTPs of Nanjing were determined in this study. The results revealed that Cr, Ni, Cu, and Zn were high-level HMs in all WWTPs. Notably, the highest contents of high-level HMs were found in electroplating WWTP (EWWTP) influent among three WWTPs, probably causing their higher removal (19.34-55.32%) during their primary treatment. In contrast, most HMs could be removed in the secondary treatment stage of municipal WWTP (MWWTP) and industrial WWTP (IWWTP) with the highest removal of As (72.00-85.81%). Analogously, nutrients were mainly removed during the secondary stage, with superior performance in MWWTP. A decrease in HMs removal was observed in the tertiary treatment of MWWTP and IWWTP compared to the secondary stage, while higher HMs removal (0.51-29.15%) was found in EWWTP except Hg. The highest content of HMs in sludge was Zn and Cr, which was more abundant in EWWTP than other WWTPs. The results of Illumina Miseq sequencing demonstrated the inhibition of microbial richness and diversity of EWWTP and IWWTP by industrial wastewater. Besides, alterations of microbial community structure and components were also observed owing to various influent sources. More similarity was found between EWWTP and MWWTP, in which the abundance of dominant genera, including Saccharimonadales (7.60-9.56%), Raineyella (5.06-7.38%), and Thauera (2.48-4.45%) was much higher than IWWTP.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-15"},"PeriodicalIF":2.2,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143432627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recycling red mud with raw coal to low-cost Fe/C/ceramic composite for efficient microwave absorption.

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-02-16 DOI: 10.1080/09593330.2025.2460242

Xiuning Du, Liping Liang, Kun Jia, Yuan Liu, Jiafa Xu, Kewei Zhang, Guomin Li

{"title":"Recycling red mud with raw coal to low-cost Fe/C/ceramic composite for efficient microwave absorption.","authors":"Xiuning Du, Liping Liang, Kun Jia, Yuan Liu, Jiafa Xu, Kewei Zhang, Guomin Li","doi":"10.1080/09593330.2025.2460242","DOIUrl":"https://doi.org/10.1080/09593330.2025.2460242","url":null,"abstract":"To solve the urgent issue of electromagnetic (EM) wave radiation pollution and promote the resource utilisation of red mud (RM, a solid waste), Fe/C/ceramic composite EM wave-absorbing materials were constructed by recycling RM with raw coal (RC) through simple mechanical mixing and then carbothermal reduction between Fe2O3 in RM and carbon component in RC. It was found that the calcined temperature of 900 °C can be considered the optimal formation temperature for Fe. In addition, a tuneable EM wave absorption performance could be attained by regulating the mass ratio of RC to RM (denoted as MRC:MRM). When the MRC:MRM value reaches to 0.4:1 and 0.5:1, the composites exhibit more favourable performance. The composite with MRC:MRM of 0.4:1 showed the minimum reflection loss (RLmin) of -41.6 dB, accompanied by an effective absorption bandwidth (EAB) of 3.2 GHz when the simulating thickness was 2 mm. The composite with MRC:MRM of 0.5:1 possessed the maximum EAB of 4.2 GHz with the RLmin of -25.3 dB at a thickness of 1.5 mm. The satisfactory performance profits from good impedance matching and strong intrinsic attenuation capability. The former can be attributed to the regulatable EM parameters of the multicomponent system; the latter is mainly credited to the strong dielectric loss arising from the medium graphitised carbon, highly crystalline Fe, and plentiful defects and interfaces in the composites. This work not only provides a valid path to realise the economical preparation of microwave absorbents but also achieves the rational disposal of RM.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-14"},"PeriodicalIF":2.2,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143432625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anaerobic biodegradation of PLA at mesophilic and thermophilic temperatures: methanation potential and associated microbial community.

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-02-11 DOI: 10.1080/09593330.2024.2449267

Lan Mu, Jingxuan Ding, Yifan Wang, Hao Peng, Junyu Tao, Emma Pulkkinen, Hang Si, Lei Zhang, Aimin Li, Jinhe Li

{"title":"Anaerobic biodegradation of PLA at mesophilic and thermophilic temperatures: methanation potential and associated microbial community.","authors":"Lan Mu, Jingxuan Ding, Yifan Wang, Hao Peng, Junyu Tao, Emma Pulkkinen, Hang Si, Lei Zhang, Aimin Li, Jinhe Li","doi":"10.1080/09593330.2024.2449267","DOIUrl":"https://doi.org/10.1080/09593330.2024.2449267","url":null,"abstract":"Polylactic acid (PLA) is the most promising bio-based alternative to traditional petrochemical plastics across diverse applications. In this study, the biodegradation performance of PLA plastic under two potential end-of-life scenarios: mesophilic and thermophilic anaerobic digestion (AD) were investigated. The biotic and abiotic influence factors were evaluated through short-time exposure experiments. The potential bacteria and archaea involved in PLA anaerobic biodegradation were identified by high-throughput 16S rRNA sequencing analysis. The results showed that PLA had different biodegradation performance at mesophilic and thermophilic digestion (the biogas yield: 36.70 ± 0.2vs 398.6 ± 1.1 mL/g VS). The increased temperature at thermophilic conditions improved the biodegradability of PLA, but an attack by microorganisms was more crucial for biodegradation. The bacteria engaged in PLA hydrolysis and acidification were closely associated with proteolytic microbes. Mesophilic biodegradation of PLA involved Clostridia (14.94%), Anaerolineae (22.6%) and acetoclastic Methanothrix (53.0%). Thermophilic biodegradation of PLA was mainly accomplished by syntrophic microbes, Clostridia (38.2%), Synergistia (18.99%) and Thermotogae (17.82%), in tandem with hydrogenotrophic Methanothermobacter (20.5%). The results provide some insights for understanding mechanisms governing PLA biodegradation under AD conditions.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-13"},"PeriodicalIF":2.2,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143398760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of Cd²⁺ and Pb²⁺ in seawater using a shipborne detection device.

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-02-11 DOI: 10.1080/09593330.2025.2450559

Zhiwei Lai, Huiling Zhong

引用次数: 0

Use of offshore oil waste and sewage sludge in the production of organomineral fertilizers.

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-02-11 DOI: 10.1080/09593330.2025.2463036

Rafael Gomes da Mota Gonçalves, Maura Santos Reis de Andrade da Silva, Marcos Gervasio Pereira, Heraldo Namorato de Souza, Everaldo Zonta

引用次数: 0

FeOOH-CoFe layered double hydroxide carbon felt cathode for the electro-Fenton degradation of oxytetracycline in aqueous solution.

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-02-11 DOI: 10.1080/09593330.2025.2460839

Ruiqi Xie, Honglei Yang, Xuan Qiu, Weilin Guo

{"title":"FeOOH-CoFe layered double hydroxide carbon felt cathode for the electro-Fenton degradation of oxytetracycline in aqueous solution.","authors":"Ruiqi Xie, Honglei Yang, Xuan Qiu, Weilin Guo","doi":"10.1080/09593330.2025.2460839","DOIUrl":"https://doi.org/10.1080/09593330.2025.2460839","url":null,"abstract":"Heterogeneous electro-Fenton is one of green and promising technologies for removing organic pollutants. In this paper, the FeOOH-CoFe layered double hydroxide carbon felt (LDH/CF) was synthesized by a facile hydrothermal method for an efficient degradation of oxytetracycline (OTC). The structural morphology and elemental composition of the composite electrode were studied by scanning electron microscopy, X-ray diffractometer, and X-ray photoelectron spectroscopy. Then, the electrocatalytic activity of the composite electrode was analysed through electrochemical characterization such as cyclic voltammetry, linear sweep voltammetry, and electrochemical impedance spectroscopy. The removal rate of 20 mg/L OTC reached about 91.6% at pH = 3, with a current density of 6.67 mA cm-2 within 60 minute in the hydrophobic FeOOH-CoFe LDH/CF + PTFE system. Moreover, the catalytic electrode exhibited impressive degradation efficiency over a wide pH range. According to quenching experiments, the principal reactive oxygen species (·O2-, ·OH, and 1O2) involved in the degradation of OTC was identified. Based on this discovery, the possible mechanism for the degradation of OTC was also proposed. In addition, the cyclic experiment demonstrated relatively excellent stability of the hydrophobic FeOOH-CoFe LDH/CF + PTFE electrode, which provided the possibility for the practical application of the electrode.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-13"},"PeriodicalIF":2.2,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143398762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical properties and micro-mechanisms of polyurethane foam treatment of construction waste.

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-02-06 DOI: 10.1080/09593330.2025.2456133

Qiang Ma, Jiwei Wu, Chuheng Zhong, Junhui Li, Xuesong Lu

{"title":"Mechanical properties and micro-mechanisms of polyurethane foam treatment of construction waste.","authors":"Qiang Ma, Jiwei Wu, Chuheng Zhong, Junhui Li, Xuesong Lu","doi":"10.1080/09593330.2025.2456133","DOIUrl":"https://doi.org/10.1080/09593330.2025.2456133","url":null,"abstract":"The generation of construction and demolition waste (CDW) has been rising rapidly in recent years. However, the recycling rate of CDW remains low due to inherent challenges such as easy fragmentation, inadequate strength, and poor engineering properties of CDW particles. To address these issues, this study investigates the application of polyurethane foam adhesive (PFA) as a strengthening agent to enhance the mechanical and structural properties of CDW for use in civil engineering infrastructure. Unconfined compressive strength (UCS) tests and consolidated undrained triaxial compression (CU) tests were performed to evaluate the mechanical performance of PFA-modified CDW, while the microstructure was analyzed using Scanning Electron Microscopy (SEM). The results indicate a substantial increase in UCS with varying PFA content after 24 h of gelling. Specifically, UCS values increased by 123.7, 263.93, 497.78, and 737.18 kPa with successive increments in PFA content. Moreover, PFA exhibited a more pronounced enhancement of shear strength compared to UCS. At a PFA content of 6%, cohesion increased dramatically from 5.29 kPa to 868.96 kPa, while the internal friction angle rose from 35.83° to 39.53°. SEM analysis revealed that PFA improves the internal structure of CDW by cementing particles, filling voids, and forming cohesive aggregates. These findings propose a novel method for CDW recycling, offering significant potential for the broader adoption of PFA-enhanced CDW in engineering applications.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-16"},"PeriodicalIF":2.2,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143364086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulation of flow field structure and sand accumulation around railway subgrade.

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-02-06 DOI: 10.1080/09593330.2025.2460241

Xue Chengjie, Zhang Kecun, An Zhishan, Zhang Hongxue, Pan Jiapeng

{"title":"Numerical simulation of flow field structure and sand accumulation around railway subgrade.","authors":"Xue Chengjie, Zhang Kecun, An Zhishan, Zhang Hongxue, Pan Jiapeng","doi":"10.1080/09593330.2025.2460241","DOIUrl":"https://doi.org/10.1080/09593330.2025.2460241","url":null,"abstract":"Based on the current situation of railway sand damage in Tuotuohe region, the structure of wind-sand flow and the spatial distribution characteristics of sand particles on both sides of railway embankment are simulated by CFD Fluent software according to flow field measurement and wind tunnel test.The results demonstrate that the subgrade's shoulders are vulnerable to suffering from wind erosion; The sand particles' spatial deposition location and thickness are significantly affected by the incoming wind velocity and the railway subgrade. When the low incoming sand-carrying wind velocity, a lot of sand grains fall and are deposited at the railway embankment slope foot due to the sand-carrying wind velocity reduced. Meanwhile, the amount of leeward side deposited sand particles exceeds the windward side due to the vortex action to the subgrade leeward side region. As incoming sand-carrying wind velocity increases, eddy current development intensity at the leeward foot of the subgrade increases, which further results in a large number of sand particles accumulated and deposited at a certain distance away from the railway embankment slope foot; Sand particle deposition location on the railway embankment top surface mainly occurred closing to the leeward side's subgrade shoulder. The phenomenon of sand deposition is more serious in the condition of weak wind and multiple wind directions; Different ground surfaces affect the density of windy sand flow structure, indirectly affecting sand particle deposition thickness on both sides of the railway embankment.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-16"},"PeriodicalIF":2.2,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143364089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0