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Preparation process of municipal sludge biochar-based catalyst based on life cycle assessment, carbon emission, and techno-economic comparative analysis

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CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY 2025年 1-14页

作者： Meng, Zhaolei Xiong, Hongbin Zhu, Chengzhu Xu, Gaofei Hefei Univ Technol Sch Resources & Environm Engn Hefei 230000 Peoples R China Dongfang Thermal Power Plant Hefei Thermoelectr Gr Hefei 230000 Peoples R China

In the context of comprehensive utilization of energy-saving and carbon-reducing solid waste, the preparation of catalysts from municipal sludge-based biochar is also one of the novel paths for sustainable utilization of resources. Based on the field operation data of the municipal sludge pyrolysis and carbonization project, this study established the full life cycle inventory of multi-energy flow and material flow data. Using SimaPro evaluation software and the economic analysis approach, from the perspectives of life cycle assessment, carbon emissions, and economic analysis, the effects of five preparation schemes in the production process on the environmental sustainability and techno-economic feasibility of catalysts prepared from the activation, impregnation, and roasting of municipal sludge-based biochar were examined. The results demonstrate that the global warming potential, human toxicity potential, and acidification potential are the main environmental impact indicators in the preparation process. Under the working condition of 1 t/h preparation capacity, the total carbon emission is lowest at 888.07 kg CO2 eq and highest at 2728.02 kg CO2 eq. The variation range of total carbon emissions reached 67.45%. The variation range of the benefit-cost ratio reached 70.66%, gross profit margin reached 35.46%, and net present value reached 41.59%. The preparation process of municipal sludge biochar-based catalysts selects the scheme with a reasonable output structure and can reduce the overall environmental burden and promote the circular economy of pyrolysis and carbonization products, which is a good strategy for energy saving and emission reduction of organic solid waste resource utilization. [GRAPHICS] .

关键词： Sludge pyrolysis Resource utilization Environmental impacts Cleaner production Profitability

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Silicon/carbon nanotubes anode for lithium-ion batteries: Synthesis, interface and electrochemical performance

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SURFACES AND INTERFACES 2024年 48卷

作者： Guo, Xiaobei Yang, Zhongtang Wang, Wei Zhang, Yi Yu, Nengfei Lu, Chunhua Nanjing Tech Univ Coll Mat Sci & Engn Nanjing 211816 Jiangsu Peoples R China Nanjing Tech Univ Sch Energy Sci & Engn Nanjing 211816 Jiangsu Peoples R China Nanjing Fiberglass Res & Design Inst Co Ltd Nanjing 210012 Jiangsu Peoples R China

Silicon/carbon composite has been a promising anode material for lithium-ion batteries (LIBs). Carbon nanotubes (CNTs) possess high electrical conductivity, specific area, and mechanical strength, holding great potential for constructing advanced Si/C anode materials. However, the unstable interface and tricky synthesis processes hinder practical applications of Si/CNTs anode. In this work, we develop a one-step method to prepare Si/CNTs composite by magnesium reduction of SiO2 mixed with CNTs. The interface between Si nanoparticles and CNTs upon the weight ratio of SiO2 to CNTs and their influences on the electrochemical performances of Si/CNTs composite have been systematically studied. The Si nanoparticle partly reacts with CNTs and forms Si-C bonds in the interface when the mass ratio of SiO2 to CNTs is above 1.5. The electrochemical performance of this threephase heterostructure (Si/CNTs-2) are significantly improved due to the Si-C chemical bonding. A high initial reversible capacity of 1100.2 mAh g-1 at 0.2 A g-1 is obtained, and the capacity of 922.4 mAh g-1 remains after 200 cycles with a high capacity retention of 83.3 %. The rate capability is excellent and the capacity is 797 mAh g-1 at 5 A g-1 and remains 612.3 mAh g-1 after 1000 cycles. The interfacial design of Si/CNTs composite provides guidance to prepare high- performance Si/C composite anode.

关键词： Silicon Carbon nanotubes Interface Lithium -ion batteries Anode

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development of fluorescent mesoporous-coated sodium fluorescein modified with 4-dimethylaminobenzoic acid composites for sensitive latent fingerprint detection

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BULLETIN OF MATERIALS SCIENCE 2025年第2期48卷 1-10页

作者： Yang, Ping Liu, Zhiyuan Shi, Tingfei Zhu, Shuangquan Xing, Honglong Li, Kuiliang Anhui Univ Sci & Technol Sch Chem & Blasting Engn Huainan 232001 Peoples R China

The application of fluorescent small molecules is greatly limited because they tend to photobleach and cause potential harm to organisms. However, SiO2 with fluorescent properties can be obtained by incorporating fluorescent small molecules into the preparation process using Stober's method. In this study, we successfully synthesized and prepared nanosized SiO2 spheres doped with sodium fluorescein (FS). The resulting fluorescent material exhibited excellent optical properties similar to FS and demonstrated good optical stability. Additionally, the surface of SiO2 spheres was easily modified, allowing for the introduction of foreign groups or small molecules. By incorporating 4-dimethylaminobenzoic acid (DBA), the final FS@SiO2@DBA fluorescent material enhanced the affinity for latent fingerprints. The use of FS@SiO2@DBA composites for latent fingerprint development demonstrated significant development effects on various substrates, including slides, metal locks, rough marble, galvanized iron sheets, quartz crucibles and blue plastic housings. These findings suggest that FS@SiO2@DBA has a significant impact on latent fingerprint development.

关键词： Sodium fluorescein SiO2 4-dimethylaminobenzoic acid fluorescent material latent fingerprint

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Optical Remote Sensing Analysis of Exhaust Emissions During Aircraft Taxiing at Hefei Xinqiao International Airport

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REMOTE SENSING 2025年第4期17卷 664-664页

作者： Qin, Yusheng Han, Xin Li, Xiangxian Gui, Huaqiao Xue, Weiwei Gao, Minguang Tong, Jingjing Zhang, Yujun Shi, Zheng Chinese Acad Sci Hefei Inst Phys Sci Anhui Inst Opt & Fine Mech Hefei 230031 Anhui Peoples R China Anhui Civil Aviat Airport Grp Co Ltd Hefei 230088 Peoples R China China Eastern Airlines Co Ltd Anhui Branch Hefei 230088 Peoples R China

The taxiing stage of an aircraft is characterized by its long duration, low operating thrust, and low combustion efficiency, resulting in substantial emissions of CO, CO2, and VOCs, which adversely affect air quality near airports. This study has developed an open-path Fourier transform infrared spectroscopy (OP-FTIR) monitor with second-level time resolution to enable the optical remote monitoring of pollutants during taxiing. Measurements of CO, CO2, and VOCs were conducted over one month at Hefei Xinqiao International Airport (HXIA). The generalized additive model (GAM) is used for data analysis to reveal complex nonlinear relationships between aircraft emission concentrations and meteorological factors, aircraft models, and their corresponding registration numbers. The GAM analysis shows that among meteorological factors, humidity, and atmospheric pressure have the most significant impact on aircraft exhaust monitoring, with a relative average contribution value as high as approximately six. The explanatory power of aircraft models for emissions is low (R-2 < 0.18), whereas that of registration numbers is high (R-2 > 0.6), suggesting that individual differences between aircrafts play a crucial role in emission concentration variations. Furthermore, a noticeable correlation was found between the CO/CO2 ratio and volatile organic compound (VOC) concentrations (R-2 > 0.63), indicating that combustion efficiency significantly affects VOC emissions. This study not only advances the real-time remote sensing monitoring of pollutants during aircraft taxiing but also underscores the crucial role of the GAM in identifying the key drivers of emissions, providing a scientific basis for precise environmental protection management and policy-making.

关键词： aircraft emissions optical monitoring meteorological factors generalized additive model

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The presumable combined effects of hydroxychloroquine and its metabolites on the blood lipids and glucose in the treatment of rheumatoid arthritis

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INFLAMMOPHARMACOLOGY 2025年 1-10页

作者： Zhang, Huaixuan Wu, Xueting Wang, Yue Yang, Zhongling Dai, Yaqian Shuai, Zongwen Anhui Med Univ Affiliated Hosp 1 Dept Rheumatol & Immunol Hefei 230022 Anhui Peoples R China Anhui Med Univ Affiliated Hosp 1 Dept Clin Lab Hefei 230022 Peoples R China Inflammat & Immune Mediated Dis Lab Anhui Prov Hefei 230032 Peoples R China

Objective To explore the potential combined effects of hydroxycholoroquine (HCQ) and its metabolites on blood lipids and glucose in the treatment of rheumatoid arthritis (RA). Methods In the HCQ group, the concentrations of HCQ and its metabolites, including desethylhydroxychloroquine (DHCQ), esethylchloroquine (DCQ) and bisdesethylchloroquine (BDCQ), were detected by high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The relationships between the levels of blood lipid and glucose and concentrations of HCQ and its metabolites were also analysed. Further, a multiple regression model was employed to evaluate the actual roles of HCQ and its metabolites in various factors affecting blood lipids and glucose. Results Significant higher high-density lipoprotein cholesterol (HDL) and lower low-density lipoprotein cholesterol (LDL) are found in the HCQ group than in the control group [1.63 +/- 0.39 mmol/l vs. 1.39 +/- 0.35 mmol/l, p < 0.001;2.15 (1.80, 2.81) mmol/l vs. 2.54 (2.24, 3.10) mmol/l, p = 0.017, respectively]. Multivariate regression analysis indicates only HCQ concentration might act as an independent factor influencing the levels of HDL, VLDL, and TG in RA patients. Conclusion HCQ might increase HDL level and reduce LDL, VLDL, TC, and TG levels in RA treatment. These beneficial effects on modifying lipid profile might be counteracted to various degrees by some of its metabolites (DHCQ and BDCQ). Therefore, for RA patients with HCQ in their treatment regime, it might facilitate the improvement of lipids profile by promoting the excretion of HCQ metabolites. This study did not demonstrate the significant hypoglycemic effect of HCQ and its metabolites.

关键词： Hydroxychloroquine Metabolite Rheumatoid arthritis Blood glucose Blood lipids

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Experimental investigation on the deterioration of the physical and mechanical properties of autoclaved aerated concrete at elevated temperatures

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HIGH TEMPERATURE MATERIALS AND PROCESSES 2024年第1期43卷

作者： Tang, Lingxiao Yao, Huayan Zhang, Mingyuan Gan, Jiarui Xie, Mingyu Xie, Wansheng Hefei Univ Technol Sch Civil Engn Hefei 230009 Peoples R China

Autoclaved aerated concrete (AAC) has been extensively studied and applied in the past decades because of its excellent thermal insulation and acoustic performance, energy efficiency, and outstanding structural performance. To investigate the deterioration characteristics of AAC under high temperatures, the physico-mechanical properties of AAC at different temperatures were tested by mass loss, wave velocity, and compressive tests, and the deterioration mechanism was discussed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) tests. The results showed that after exposure to elevated temperatures, the parameters of apparent form, mass loss, wave velocity, and compressive strength underwent remarkable conversions. It was observed that the ultrasonic behavior of AAC was affected at high temperatures as it increased at 100 degrees C and decreased beyond 100 degrees C. In addition, the compressive strength exhibited a two-stage transformation, slightly increased from ambient temperature to 300 degrees C, and exhibited a rapid reduction beyond 300 degrees C. At 900 degrees C, the specimen lost its strength. By XRD, TGA, and SEM, it was confirmed that a series of physicochemical changes in AAC, such as the water escape and evaporation, decomposition of calcium silicate hydrate and calcium carbonate, and structural damage, were the primary reasons for the deterioration of the physical and mechanical properties at elevated temperatures.

关键词： autoclaved aerated concrete temperature compressive strength microstructure deterioration mechanism

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Network Meta-Analysis of All Available Regimens Based on Drug-Coated Balloon Angioplasty and Laser Atherectomy for Femoropopliteal In-Stent Restenosis

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JOURNAL OF ENDOVASCULAR THERAPY 2024年第3期31卷 390-399页

作者： Yu, Chaowen Tang, Wenbo Ren, Tiancai Chen, Qiwei Lu, Ran Gao, Yong Bengbu Med Coll Affiliated Hosp 1 Dept Vasc Surg 287 Changhuai Rd Bengbu City 233000 Anhui Peoples R China

Purpose: Drug-coated balloon (DCB) angioplasty and laser atherectomy (LA) have been frequently utilized to treat femoropopliteal in-stent restenosis (ISR);however, no studies have concurrently compared available regimens, including DCB, LA+DCB, and LA + plain balloon angioplasty (PB). Therefore, we conducted this network meta-analysis to determine whether there were significant differences in outcomes among these regimens. Materials and Methods: A comprehensive search was conducted in PubMed, EMBASE, and the Cochrane library to identify all randomized controlled trials comparing DCB or LA-based regimes with POBA or each other for treating femoropopliteal in-stent restenosis (ISR) from their inception until March 2021. The primary outcome measure was binary restenosis, and secondary outcome measures were target lesion revascularization (TLR) and mortality, evaluated at 6 and 12 months, respectively. Statistical analysis was performed using Aggregate Data Drug Information System (ADDIS) 1.4 software, and all data were graphically summarized using Microsoft Excel software. Results: The final analysis included 11 studies, of which 6 studies compared DCB with PB, 2 studies compared PB vs LA+PB, 2 studies compared DCB vs LA+DCB, and 1 study compared LA+DCB with LA+PB. DCB was better than PB in decreasing binary restenosis at 6 (odds ratio [OR]: 0.22, 95% credible interval [CrI]: 0.04-0.91) and 12 (OR: 0.26, 95% CrI: 0.12-0.50) months. DCB was associated with lower TLR than PB at 6 months (OR: 0.31, 95% CrI: 0.13-0.69). LA+DCB was also superior to PB in treating binary restenosis at 12 months (OR: 6.10, 95% CrI: 1.94-24.41) and TLR at 6 months (OR: 5.32, 95% CrI: 1.43-28.06). There was no statistical difference in mortality between PB, DCB, and LA+PB. DCB and LA+DCB were the first 2 options for reducing binary restenosis and TLR. Conclusion: The current network meta-analysis demonstrates that both DCB and LA+DCB are superior to PB alone, and that DCB and LA+DCB may be the

关键词： femoropopliteal disease in-stent restenosis drug-coated balloon laser atherectomy network meta-analysis

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EFFECTS OF LONG-TERM STORAGE OF PIG SLURRY ON NITROGEN LOSS IN DIFFERENT SEASONS AND STORAGE CONDITIONS

JOURNAL OF THE ASABE

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JOURNAL OF THE ASABE 2024年第3期67卷 641-648页

作者： Chen, Guangyin Dong, Jinzhu Wu, Pei Wang, Enhui Zheng, Jiawei Liu, Xu Anhui Normal Univ Sch Environm & Ecol Wuhu Anhui Peoples R China

. Pig slurry (PS) can be applied to farmland only in certain periods during the year, so long-term storage is required before field application. The effects of the long-term storage of the PS on N loss in different seasons and under different storage conditions (open and sealed storage) were investigated in this study. The physicochemical properties and slurry temperature varied greatly in different seasons. The electrical conductivity, chemical oxygen demand, ammonium nitrogen, nitrate nitrogen, total nitrogen (TN), and heavy metals (Cu, Zn, Pb, As, and Cd) decreased after 150 days of storage, while the pH value increased, and all these indicators (except for the heavy metals) were affected by the slurry temperature, exhibiting a larger decrease at higher slurry temperatures. The decrease in the N loss was 47%-56% lower in the sealed treatments than in the open treatments. The As, Pb, and Cd contents of the stored PS (except for the AU-OP treatment) met the requirements specified for GB/T 40750-2021. Overall, storing PS under sealed and lower temperature conditions was conducive to reducing N loss and improving the N content of the stored PS.

关键词： Heavy metal Nitrogen loss Open storage Pig slurry Sealed storage Temperature

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Stability Analysis of Deep Belief Network: Based SD-AR Model for Nonlinear Time Series

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NEURAL PROCESSING LETTERS 2024年第2期56卷 65-65页

作者： Xu, Wenquan Hu, Hui Anqing Normal Univ Sch Elect Engn & Intelligent Mfg Anqing 246001 Anhui Peoples R China Anqing Normal Univ Sch Teacher Educ Anqing 246001 Anhui Peoples R China

As for nonlinear time series prediction, many different kinds of varying-coefficient models have been proposed and analysised in recent years. A kind of varying functional-coefficient autoregressive model, called the deep belief network-based state-dependent autoregressive (DBN-AR) model is considered in this paper. The stability conditions and existing conditions of limit cycle of the DBN-AR model are also studied. An especial designed parameter estimation method is used to identify the DBN-AR model. The DBN-AR model is used to predict the famous Canadian lynx data and Henon chaotic series, the prediction capability of the DBN-AR model is compared with other prediction models, the experimental results show that the DBN-AR model obtains better prediction accuracy.

关键词： Deep belief network Stability analysis Nonlinear time series Varying-coefficient

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A Wideband Gain-Enhanced Groove Gap Waveguide Slot Antenna Using Metal Pin Array

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IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS 2024年第1期23卷 159-163页

作者： Yan, Songlin Chen, Qian Guo, Xinyue Qiao, Zilin Huang, Zhixiang Yang, Lixia Li, Yingsong Wang, Wei Liang, Xianling Anhui Univ Informat Mat & Intelligent Sensing Lab Anhui Prov Hefei 230601 Peoples R China Anhui Prov Key Lab Target Recognit & Feature Extr Luan 237011 Peoples R China Anhui Univ Key Lab Intelligent Comp & Signal Proc Minist Educ Hefei 230039 Peoples R China East China Res Inst Elect Engn Hefei 230088 Peoples R China Shanghai Jiao Tong Univ Dept Elect Engn Shanghai 200240 Peoples R China

In this letter, we proposed a wideband, gain-enhanced, and high radiation efficiency (REFF) groove gap waveguide (GGW) metal slot antenna using a metal pin array. The proposed antenna consists of a GGW feed metal layer and a slot radiation metal layer. The open short sides of the GGW contribute a wide working bandwidth, while the introduction of metal pin arrays positioned on both sides of the radiation slot enhances the antenna's gain and front-to-back ratio (FBR), promoting the symmetry of the radiation patterns. The measured results of the antenna agree well with the simulation results. It exhibits a wide working bandwidth of 63.4-88.8 GHz with voltage standing wave ratio (VSWR) less than 2, a gain of 10-13 dBi, a high REFF of 80%-95%, and a high FBRof 30-45 dB. The proposed antenna can be used for broadband millimeter wave (MMW) communication and MMW imaging.

关键词： Metals Pins Antenna radiation patterns Antenna measurements Gain Antennas Antenna arrays Gain-enhanced groove gap waveguide millimeter wave (MMW) wideband

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