bluuebunny/crossref_metadata_2025 huggingface dataset:
Supercritical Hydrothermal Synthesis of Nano-Zirconia: Reaction Path and Crystallization Mechanisms of Different Precursors
Authors: Liu Lu , Zhao Jun-an , Wang Shuzhong , Zhang Baoquan , Yang Jianqiao , Liu Hui
Published: July 2023

Nano-zirconia exhibits excellent mechanical properties (fracture toughness, hardness and flexural strength), thermal performance (thermal conductivity), optical properties and biological properties for various ceramic-based applications. Supercritical hydrothermal synthesis technology is an advanced and environmental-friendly method for preparing nanoscale powders. In this paper, the formation and crystallization of nano-zirconia during supercritical hydrothermal synthesis were systematically investigated. Different precursors (zirconium nitrate, zirconium oxychloride, zirconium acetate) reacted in supercritical water and the quality of nano-zirconia in different systems were comprehensively evaluated using XRD, TEM, IR, BET analysis. Finally, the most suitable precursor type was identified and the reaction path as well as crystallization mechanisms of different precursors were revealed.
Failure Analysis of T800 Carbon Fiber Composite Joint Structure With Double Bolts
Authors: Zhang Youhong , Li Jiaxiang , Sun Chaofan , Chang Xinlong , Yue Chunguo
Published: July 2023

In this paper, the progressive damage model of T800 carbon fiber composite double-bolt joint based on Hashin criterion was established based on the finite element analysis. By changing the bolt diameter, the numerical simulation of the strength change of the joint was carried out. The damage evolution process was studied and the corresponding verification test research was carried out. Finally, the damage and failure process of the T800 carbon fiber composite double-bolt joint is given, and the strength optimization design scheme is proposed.
Analysis of Rubber Roller Coating and Influence of Rubber Roller Characteristics on the Coating Thickness
Authors: Huang Xue-jia , Bao Neng-sheng , Zhao Yi-jie , Xu Peng , She E-zhen
Published: July 2023

This paper has got the relationship between coating thickness and roller radius,speed, viscosity,elastic modulus,load,which is through the analysis of rubber roller’s coating flow mathematical model,and verify the elastic modulus and the load force on the coating thickness through the experimental methods. Experiments show that the coating thickness is inversely proportional to the elastic modulus and the load force.In conclusion, the diameter of the roller, the range of load imposed on the rubber roller, the hardness of rubber roller hardness, the suitable viscosity range and the speed limit must be taken into account during the design of the five rollers solvent-free coating system.
Preparation of 3D Frame Material for Lithium Metal Battery Anode Based on Waste Lithium-ion Battery Anode Graphite
Authors: Ren Jingjie , Yang Feiyang , Wang Meiling , Gou Zhaolin , Chen Ziyi , Hu Xinrong , Zhang Cunzhong , Yao Ying
Published: July 2023

With the increase of waste lithium-ion batteries (WLIBs), the recycling of WLIBs has been paid more attention. Lithium metal battery (LMB) has extremely high theoretical specific capacity. However, the decline of cycle performance and the danger of short circuit caused by lithium dendrite formation and dead lithium accumulation are still the most thorny problems for the anode of LMB. Herein, the high value utilization of WLIBs anode graphite was explored, and it was prepared as a 3D frame material for LMB. Liquid-phase reduced graphite oxide nanosheets (lrGO) were prepared from AG, then, ZnO nanoparticles were loaded on lrGO. SEM, EDX and XRD were used to characterize lrGO and lrGO-ZnO , and the electrochemical tests were carried out. The results showed that lrGO and lrGO-ZnO maintained excellent cycle stability. Under the constant current density of 1mA cm-2, the stable cycle of lrGO-ZnO was 700 cycles, and the charge-discharge platform potential difference maintained at 22.5 mV after 200th cycle. The unique 3D structure of lrGO increased the electrode reaction area and suppressed the volume expansion of Li. The loading of ZnO significantly improved the lithiophilicity and cycle stability.
Study on Biodegradation Characteristics of Industrial Phenol-Containing Wastewater by Biological Co-Metabolism Technology
Authors: Wang Jianguang , Fang Haifeng , Fu Shengjie , Li Shiyi , Lin Xiaohu
Published: July 2023

Biological co-metabolism is an economical and efficient technique for treating refractory organic matter, and in recent years, it has been widely used in the treatment of chlorophenol-containing wastewater. It has been found that many conditions affect the bio co-metabolism efficiency, such as the carbon source type, carbon source content, microorganism types, and environmental factors. The carbon source concentration experiment showed that when the dosage ratio of sodium acetate to black aniline powder was 1:2, the degradation rate of black aniline powder was 82%, and the removal rate was 92.9%. When tetrachlorophenol increased from 210 mg/L to 2100 mg/L, the tetrachlorophenol was increased in the effluent, and the microorganism's activity was inhibited. Besides, the sedimentation performance of activated sludge was also damaged. The temperature test showed that the removed 4-chlorophenol was as high as 2100 mg/L at 35 °C, and the apparent 4-chlorophenol residue in the effluent could be detected at 20 °C. Therefore, by appropriately controlling the external operating conditions of the reactor, the co-metabolism of refractory organic such as chlorophenols can be achieved.
Application Progress of Aerogel / Inorganic Cementitious Composites in Building Thermal Insulation
Authors: Zeng Shuisheng , Zhang Jun , Zhang Huanlin , Li Rutian , Wang Guichao
Published: July 2023

In recent years, the problem of energy saving and consumption reduction in the construction industry has attracted more and more attention. The state has also put forward higher requirements on the energy saving, environmental protection and fire safety of building exterior wall insulation in terms of policies. Aerogel materials are considered to be the most promising thermal insulation materials in the future due to their excellent thermal insulation properties and fire resistance. In this paper, the preparation process and application of aerogel inorganic cementitious composites were investigated, mainly aerogel cement composites and aerogel gypsum composites. We analyzed the recent research results, and focused on the preparation optimization and application prospects of aerogel inorganic cementitious composites. In the preparation of aerogel inorganic cementitious composites, many researchers have proposed different preparation methods to optimize the interface between aerogel and inorganic cementitious materials in order to avoid the strength degradation caused by doping aerogel. At present, preparing aerogel into aerogel slurry for compounding is considered to be a relatively optimal incorporation method. It is found that aerogel inorganic cementitious composites have great prospects for thermal insulation applications in the construction field. However, due to the high cost of aerogel preparation and the poor interfacial bonding between aerogel and inorganic cementitious materials, the application of aerogel in building thermal insulation is limited. This paper has reference significance for studying the application of aerogel in the construction industry.
Biofuel Production Via in Situ Resource Utilization on Mars
Authors: Meng Xiangyu
Published: July 2023

This paper is based on the fundamentals and principles of materials science and resource utilization. In-situ resource utilization (ISRU) can make full use of materials in space to produce the resources needed for human survival and even interstellar migration programs. Bio-based biofuel production solutions can address human consumption in space exploration while allowing the production of fuels in a sustainable manner, with minimal inputs and producing cleaner, more environmentally friendly fuels.ISRU biofuel production can be achieved by directly converting inorganic carbon (atmospheric CO2) into target compounds as biofuels by autotrophic microorganisms, or by fixing carbon and then use metabolic engineering to convert biomass or complex substrates into target compounds, completing a two-step biofuel production process. In this paper, we investigate a potential microbial cell factory for biofuel production on Mars via ISRU, leading to some relevant breakthroughs and discoveries. This paper advances the development of the research content through a series of studies.In this paper, we have studied and optimized the use of new energy fuels based on basic fuel performance studies. This paper provides a new way of thinking and research in the field of energy research, based on the previous basic research.
Study on the Adaptability of Jurassic Nitrogen Foam Cone Pressing
Authors: Tang Xiujun , Li Xiao , Yang Chen , Li Ling
Published: July 2023

Aiming at the problems of bottom water coning and oil well flooding caused by the large impact of the early production strength of the Jurassic bottom water direct contact well in the Seventh Oil Production Plant. Carry out research on nitrogen foam control bottom water coning technology, mainly including: ①laboratory test to optimize foam system suitable for Jurassic system of No. 7 Oil Production Plant, determine injection concentration and optimal gas-liquid ratio; ②The nitrogen foam injection timing and shut in time were optimized by numerical simulation method; ③Summarize the field tests that have been carried out, and determine the optimal combination of parameters suitable for the Jurassic nitrogen foam pressure cone of No. 7 Oil Production Plant.
Research Progress on Numerical Simulation of Heterogeneous Flow Resistance in Sludge Conveying System
Authors: Chen Wenluo , Lu Hai , Wang Jing
Published: July 2023

Sludge pipeline transportation is increasingly used in different fields. Flow resistance is an important influencing factor in the pipeline transportation of solid-liquid two-phase flow slurry, and studying its characteristics is of great significance for optimizing pipeline design, reducing pipeline erosion and wear, and reducing transportation energy consumption. In view of the complexity of sludge as the resistance characteristics of solid-liquid two-phase flow, it is often necessary to analyze the inline mechanism of solid-liquid two-phase flow in slurry with the help of high-precision turbulent flow model in computational fluid dynamics (CFD), which has become the research focus of heterogeneous solid-liquid two-phase flow pipeline transportation. This paper analyzes and summarizes the CFD simulation status of heterogeneous solid-liquid two-phase flow resistance in pipelines, points out the future research direction, and provides reference for the analysis of heterogeneous flow resistance of sludge pipeline transportation and the optimization design of conveying system.
Failure Analysis of Butane Spherical Tank Flange Cover Crack
Authors: Liu Chang , Du Chenyang , Lu Jianyu , Tan Xinli , Liu Baolin , Liu Yuxin
Published: July 2023

In response to the crack failure phenomenon of the lower flange cover of a butane spherical tank in a certain petrochemical company, the failure reason was analyzed through macroscopic observation, material analysis, scanning electron microscopy analysis, metallographic test analysis, impact test analysis, etc. The results show that the fillet weld of the flange cover is a stress concentration area, and after a period of use, the internal stress gradually releases. In addition, the internal dislocations in the grains gather, causing cracks to initiate from within the grains and gradually delay the occurrence of cracks, leading to brittle fracture failure of the flange cover.
Numerical Simulation of Mechanical Behavior of Gas Pipeline in High and Steep Slope
Authors: Liang Ping , Wen Xingqiang , Liu Jinhai , Li Yuan , Zhou Zeshan
Published: July 2023

Long-distance natural gas pipelines can often pass through the common slope safely. However, when pipelines inevitably pass through high and steep slopes(HSS) for some reasons, it is difficult for engineers to predict the stress state of pipelines. Therefore, in order to investigate the safety of natural gas pipelines in HSS areas, the finite element simulation calculation model of the pipeline in HSS was established. The predicted numerical model shows that the maximum Von Mises stress and axial strain of the pipeline in the HSS area appear at the lower elbow of the pipeline, which should be paid more attention to in the risk assessment; The stress and deformation of the pipeline is mainly related with the wall thickness and internal pressure, appropriately increasing the wall thickness and reducing the internal pressure can improve the safety of HSS pipelines.
Simulation of Formaldehyde Distribution Characteristics under Different Indoor Conditions and Optimization of Monitoring Methods
Authors: Dai Chao , Ren Zhiping , Wang Huichao , Guo Lei , Gao Ning
Published: July 2023

The distribution of indoor formaldehyde concentration is affected by many factors, which makes the concentration distribution of formaldehyde in different indoor positions uneven, which has a negative impact on the monitoring accuracy. Firstly, through orthogonal experiment and numerical simulation, it is determined that the airflow organization and the location of pollution source have a great influence on the monitoring accuracy. Further research found that the relative position of the air supply airflow and the pollution source affected the diffusion of formaldehyde in the room. Through Computational Fluid Dynamics(CFD) simulation, the error and correction basis of the monitoring data caused by different monitoring conditions were obtained. Finally, the accurate optimal monitoring position is given by genetic algorithm optimization. In the optimization process of 17 working conditions, 76% of the working conditions only need one sensor and correction, which can make the monitoring effective coefficient λ reach more than 80%, and 24% of the working conditions need two sensors.
Study on the Track and Degree of Pb Content Transportation
Authors: Yang Dongfang , Zhang Xiaoju , Manickam Sivakumar
Published: July 2023

Heavy Pb pollution has been noted in many developed countries. This study examined Pb pollution in Jiaozhou Bay for human security. We used the survey data on the Jiaozhou Bay waters of May, September and October 1994, the results examines Pb content and its horizontal distribution in the surface water bodies, which showed that the in the waters of Jiaozhou Bay Pb content expresses the range of 0.12-2.48 μg/L, agreeing with the seawater standards of Class I and II. Moreover, it has been noted that by the view of Pb content, Pb content in May, September and October polluted the Jiaozhou Bay water bodies softly. In May, September and October, the Pb content in the waters of Jiaozhou Bay ranged from 0.12 to 1μg/L, 0.84 to 1.34 μg/L, and 0.92 to 2.48 μg/L. These results show that Pb content in May did not pollute the Jiaozhou Bay water bodies. While Pb content during September and October slightly polluted. Three sources transported mainly Pb content into Jiaozhou bay. These sources are rivers, land surface runoff and offshore ocean currents. The rivers transported the Pb content 0.47-2.48 μg/L, the land surface runoff 2μg/L and the offshore ocean currents 1.34 μg/L. It demonstrates that Pb slightly polluted rivers, land surface runoff and offshore ocean currents in the transportation of Pb. From May to October, rivers transported Pb content which varied significantly. In September, land surface runoff transported Pb content during the rainy season. In addition, the offshore currents also transported Pb content to the waters of Jiaozhou Bay. Human activities discharged Pb content to land and transported it to the ocean, relying on the land surface runoff and rivers. Thus, two channels were transporting Pb content on land to the ocean, increasing Pb content. Through ocean currents, Pb content was transported from the high-content water area to the low-content water area. Therefore, the Pb content transported by rivers and land surface runoff could raise concerns from humans.
Study on Rock Stress Sensitivity of Chang 8 Tight Oil Reservoir in Fuxian Block
Authors: Ao Yangyang , Wang Yin , Cui Pengxing , Sun Xinhua , Kang Shengsong
Published: July 2023

The combined oil reservoir under the Yanchang Formation has been proven to have approximately 340 million tons of oil geological reserves, which is an important resource guarantee for Yanchang Oil to achieve the stable production target of 10 million tons. The development and research of oil reservoirs are in the initial stage, and there are many technical difficulties in the overall development, which seriously affect the sustained high and stable production of the lower combination reservoir. Therefore, nuclear magnetic resonance technology was used to conduct stress sensitivity testing on the pore structure of the Chang-8 reservoir in Fuxian County, Ordos Basin. It was recognized that large-diameter pores are easily compressed, but porosity accounts for a relatively small proportion, so the influence of confining pressure on permeability is greater.
Briefly Discussing Measures to Promote the Clean Energy Accommodation
Authors: Xia Hui , Wang Tong , Li Jiabin , Wang Yuzhi
Published: July 2023

Following the national strategies of energy conservation and environmental protection and sustainable development, it is necessary to clarify the requirements for clean energy development to alleviate energy shortage and control environmental pollution, which can provide support for clean energy development projects. Many companies in China have been involved in clean energy development activities under the guidance of preferential national policies and have made a lot of useful attempts, which have so far yielded certain results. Clean energy accommodation involves a wide range of elements, covering economic, technical and policy aspects. In addition, the extremely deep interest relationship exists between new energy generation companies, conventional energy generation companies and users . Due to the complexity of the situation, it is difficult to realize the idea of clean energy consumption in the short term. Based on the “14th Five-Year Plan” development policy system, this paper proposes measures to promote clean energy accommodation around the new energy and hydrogen energy industries. And on this basis, combined with the operation of the electricity market, this paper gives suggestions to promote the level of clean energy consumption in order to have a positive role in promoting energy consumption in China.
Low-carbon Transformation of Nankai Campus Based on Energy Audits Comprehensive utilization of New Energy
Authors: Jiang Youtao , Liu Weitao , Wang Fuqing , Shi Linguang , Zhang Xunda , Guo Bowen , Li Shuyang , Zhang Zhengao , Xiao Yonggang , Li Ye
Published: July 2023

The existing campus has a large building area, a low level of energy saving, less renewable energy utilization, higher energy consumption, and obvious energy-saving space. Based on the energy audit of Nankai University, this paper proposes a low-carbon campus transformation technology system combining building energy saving, clean heat supply and distributed photovoltaic in view of its problems such as high municipal heating energy consumption, low comfort, high electricity bill, and tight electricity consumption. Because the campus has both winter holidays and there is tidal phenomenon in teaching buildings and dormitory buildings, etc., the heating demand is reduced, so its heating and energy-saving space is large. At the same time, the number of campus building floors is low, the roof is conducive to the installation of photovoltaic, it is estimated that the annual power generation of rooftop photovoltaic installation can reach more than 70% of the campus electricity consumption, combined with energy-saving transformation and smart energy management, it is easy to achieve its low-carbon goals.
Study on the Sustainable use of Regional Groundwater Resources
Authors: Wang Meiyu , Dai Changlei , Gao Yu
Published: July 2023

Water resources have become a major factor limiting the sustainable development of China’s economy and society, and at the same time China’s water resources are developed and utilized in a relatively sloppy manner, China is facing multiple pressures of population, resources and environment, and the problems of water shortage, water environment deterioration and flood disaster prevention are becoming increasingly prominent. The rapid development of economic and social demand for water resources is increasing, and the people’s desire to improve the ecology and environment is becoming more and more urgent. How to fully consider the sustainable use of water resources, effectively solve the contradiction between water demand and supply, development and protection, improve the level of planning and scientific decision-making, promote economic development and water carrying capacity to adapt to accelerate the transformation of economic growth and structural adjustment is of great importance.
Extended Kalman Filter-Based SOC Estimation for Lithium Battery Packs
Authors: Zhang Ruoyuan , Zhang hailong
Published: July 2023

With the continuous reduction of energy and aggravation of environmental damage, the wind and solar complementary power generation system has received wide attention, among which the lithium battery pack is one of the most concerned components of the whole system. Accurate and effective estimation of the state of charge (SOC) of lithium battery pack not only can ensure the rational use of resources and reduce costs, but also ensure the safe and reliable operation of the system. Since the normal operation of Li-ion battery pack has strong nonlinearity, a general nonlinear equivalent circuit model is selected, the charge/discharge multiplier and ambient temperature are fully considered, the Fourier function is used to effectively fit the model parameters, and the extended Kalman filter algorithm (EKF) is used to dynamically estimate the SOC of Li-ion battery pack in combination with the traditional ampere-time integration method, and the simulation is verified by MATLAB software. The results show that the extended Kalman filter algorithm selected in the paper can effectively track the SOC of the lithium battery pack and control the tracking error below 1%.
Study on Adsorption Performance of Fe-Modified ZIF-67 Bimetallic Organic Framework for Toluene
Authors: Ji Fengjun , Jiao Dong , Wang Heng , Cao Qing , Guo Jingchuan , Cao Xuankai , Li Yanteng , Gao Yan
Published: July 2023

Volatile Organic Compounds (VOCs) are significant contributors to air pollution and play a crucial role as precursors for secondary pollutants such as O3, thereby posing severe health risks and attracting global attention. ZIF-67, a metal-organic framework (MOFs), possesses a porous microstructure and high specific surface area, offering exceptional adsorption performance, catalytic activity, and structural stability. In this investigation, a solvent-thermal method was employed to synthesize a series of Fe-modified ZIF-67 denoted as FCMx. The impact of Fe doping and temperature on the dynamic adsorption performance of toluene was examined. The results revealed satisfactory adsorption performance of FCMx when the Fe doping was 14 mol%. FCM14 achieved saturation adsorption of toluene in approximately 5000 s, exhibiting a saturated adsorption capacity of 1769.80 mg/g at 25 °C. This represented a 25% improvement in adsorption time and a 30% increase in saturated adsorption capacity compared to undoped ZIF-67. Furthermore, at a reaction temperature of 150 °C, FCM14 exhibited saturation time of approximately 4300 s and a saturated adsorption amount of 1471.43 mg/g, indicating a combined effect of chemical and physical adsorption. The findings of this research provide valuable experimental data and theoretical support for the potential industrial application of MOFs in VOC adsorption.
One-pot Preparation of Porphyrin-Sensitized ZIF-8 as a Visible Light Photocatalyst
Authors: Zhang Xiaodong , Duan Yuhan , Duan Qian
Published: July 2023

Tetraaminoporphyrin (TAPP) sensitized ZIF-8 was successfully prepared by one-pot method as an efficient visible light photocatalyst. The prepared photocatalyst TAPP/ZIF-8 was characterized by XRD and SEM. The combination of TAPP and ZIF-8 enhances the absorption of visible light, effectively improves the electron-hole separation, and improves the photocatalytic activity under visible light. In the photocatalytic experiment, TAPP/ZIF-8 showed good photocatalytic performance for the removal of Rhodamine B (RhB) under visible light. Therefore, our work provides an efficient green photocatalyst for water treatment.
Novel Process for Carbon Cycle Utilization from Industrial Flue Gas into Methanol
Authors: Ma Qian , Zhang Xu , Yu Xiaodan , Liu Anqi , Yuan Bo , Chen Xiaojun
Published: July 2023

Reduction of greenhouse gas (GHG) emissions for mitigating climate changes is globally necessary. As a major GHG emitter, refinery sector is responsible for 14.1% of China’s CO2 emission in 2019. The flue gas associated with petroleum refining has high CO2 content, presenting potentials for methanol and electricity co-production when the methane and hydrogen in dry gas are considered. To unlock the green opportunity for refineries, in this study we employed Aspen Plus to develop the process of methanol synthesis by recovering CO2 in the flue gas of fluid catalytic cracking (FCC) unit and the methane and hydrogen in dry gas. The results show that the new co-production process increases the energy efficiency of the FCC unit by 2.4%. Compared with traditionally natural gas-based methanol production, the developed process enables annual CO2 mitigation of 1.3 million tons.
Analysis of Research Hotspots in the Field of Reverse Osmosis Desalination
Authors: Yan Duanwu , Wang Shuo , Zhang Hui
Published: July 2023

Reverse osmosis technology in the field of seawater desalination has become a hot topic in recent years. In this study, 2,507 literatures in WOS database from 2013 to 2022 were analyzed using Citespace visualization technology. It is found that the number of literatures published and their citation frequency on reverse osmosis desalination are on the rise globally. At present, research hotspots mainly focus on forward osmosis, interfacial polymerization, draw solution, reverse osmosis, brine discharge and boron removal. Future research hotspots will focus more on ammonia carbon dioxide, layer, draw solution and economic analysis. Through bibliometric analysis method, this study provides a quantitative review of relevant literature for the development of reverse osmosis desalination field, and has an in-depth understanding of the development and evolution of this field.
Study on Spatial and Temporal Distribution of Nutrient Salts in Typical Seaward Rivers in Hainan Island
Authors: Gao Shengyuan , Ma Yingkai , Qiao Zhizhuang
Published: July 2023

Hainan Island, China’s second largest island, is located in the tropics and its rivers are significantly affected by precipitation. With the construction of free trade port with Chinese characteristics, Hainan Island’s industry, agriculture, tourism and urbanization have developed in an all-round way. With the rapid development of economy, water environment ecology has been destroyed. Based on the two seasons of drought and rain, this paper took Ningyuan River and Wanquan River as the research object to study the spatial and temporal distribution of nitrogen and phosphorus nutrients in the rivers entering the sea in Hainan, and found that the concentration of nutrients in Ningyuan River was higher than that in Wanquan River. The total nitrogen pollution in dry season was higher than that in rainy season, and that in tributaries was higher than that in main stream. The maximum nitrogen content in Ningyuan River reached 2.99 mg/L and 2.37 mg/L in the dry season and rainy season, and human activities were the main reason for the increase of nutrient concentration.
Measurement of Embodied Carbon Emission of Trade and Responsibility Sharing Mechanism design: A case of Six Central Provinces of China
Authors: Xiang Kangli , Chen Wanqing , Zhang Liuxin , Lin Xiaofan , Wu Yuan , Ma Lianrui
Published: July 2023

In the face of the “ 3 0- 6 0” target, the task of carbon emission reduction in China is particularly arduous. Due to factors such as energy resource endowment and economic and industrial structure, there are large spatial differences in carbon emission levels among regions in China. As a representative region of t h e traditional energy industrial structure, the huge energy consumption of the industrial sector in the central region has caused a large amount of carbon emissions. Based on the MRIO model, this paper measures the embodied carbon emissions of trade and the amount of carbon emissions that the regions should bear in 2012 and 2017 for the eight major regions in China. We found that there is large difference in carbon emissions among the eight regions in China, with the central region ranking first in the country, and this difference is also manifested in the provinces of the central region. In addition, under the producer responsibility principle, the problem of carbon leakage between developed and less developed regions is becoming more prominent, with the central and western regions acting as a “ pollution haven” . Further, to rationalize the carbon emission responsibilities of each region, this paper proposes a shared responsibility scheme and compares it with the producer and consumer responsibility systems. This paper is of practical and theoretical reference significance for the scientific delineation of carbon emission reduction responsibilities and the effective promotion of the overall carbon peaking goal.
Energy Recovery from Herbal Wastewater and Monosodium Glutamate Wastewater through Anaerobic Co-Digestion
Authors: Ling Shengxi , Lin Youwei , Liu Ruina , Huang Zhaohui , Xu Gongdi
Published: July 2023

Anaerobic continuous stirring tank reactor (CSTR) was employed for biohydrogen production by anaerobic co-digestion from the mixture of herbal wastewater (HW) and monosodium glutamate wastewater (MGW). A series of blend volumetric proportions (MGW/HW), organic loading rates (OLR) were used as control strategy and evaluated for optimal biohydrogen production. The highest biohydrogen production of 7260±7.7 mL L-1 d-1 was attained at blend proportion of 15%, OLR of 41 g COD L-1 d-1 while the highest biohydrogen yield of 508.9±7.2 mL g CODremoved-1 was observed at same conditions. This study demonstrated the feasibility and effectiveness of enhanced biohydrogen production by adding MGW to compensate the low nitrogen content of HW.
Comparison of Carbon Emissions in Different Sludge Treatment Pathways - a Case Study of Jiaxing, China
Authors: Wu Lijun , Li Junjie , Feng Chengwei , Chen Fenfei , Li Jianhang , Zhang Qi
Published: July 2023

Sludge management strategy is essential to future carbon reduction in wastewater plants since the treatment and disposal of sludge contribute significantly to the carbon emissions. Using the method proposed by intergovernmental Panel on Climate Change(IPCC), the three sludge treatment paths of a typical wastewater treatment plant in Jiaxing were investigated. The result showed that net carbon emission is negative at -588kgCO2/tDS thanks to R3 which is characterized by centrifugal dehydrator, coal blending incineration with combined heat and power generation and cement substitute by slag is the rout with lowest carbon missions. The carbon emission of R1 is the highest at 699.87 kgCO2/tDS because of the chemical reagents. Process unit with larger carbon emissions was identified to be dewatering in which chemical reagent contributed the most. The main carbon offsets was the combined heat and power cogeneration which should be widely advocated.
Analysis of Diversion Capacity of Yellow River Diversion Sluices in Irrigation Areas of Lower Yellow River
Authors: Li Ziming , Zheng Yanting , Bai Yunsheng
Published: July 2023

This paper analyzes the influence on the diversion capacity of the Yellow River diversion sluices of factors such as the diversion water level change of the Yellow River diversion sluices in the irrigation areas of the lower Yellow River, the scouring of river channels and the siltation change in the diversion channels. It is suggested that the main reason for the decrease in diversion capacity of the Yellow River diversion sluices in different inflow levels is the obvious decrease in the water level of the same discharge due to the continuous scouring of river channels. At the end of this paper, targeted countermeasures and suggestions are put forward to solve the problem of the water diversion capacity decline of Yellow River diversion sluices.
The Application of Stochastic Seismic Inversion Method of Geostatistical Inversion in Putaohua X Area
Authors: Wu Gengwang , Wang Kaiyan
Published: July 2023

Stochastic seismic inversion is an important part of geostatistical inversion method, and is the combination of seismic inversion and sequence simulation. In the process of random seismic inversion, firstly, the histogram distribution of random variables is counted, the variation function of random variables is calculated, and the variation range of random variables in different directions is determined. Then, for each implementation, the seismic traces are synthesized at the seismic channel position according to the calculated reflection coefficient, and the error between the synthetic traces and the original seismic traces is compared, and the inversion results are output after the required accuracy is reached. Geostatistical inversion can improve the vertical and horizontal resolution of the reservoir and accurately describe the spatial distribution of the reservoir. Taking the Heidimiao oil layer in the west slope area of Daqing Placanticline as an example, this paper expounds the application of geostatistical inversion in the work area as a whole. Combined with the results of seismic attribute analysis and well logging curve preprocessing, the inversion results formed by accurate time-depth calibration and other processes of reservoir sensitivity parameter analysis provide a basis for optimizing the target well location in the work area.
Exploratory Research on the Relationship Between open Pit of Building Sand and Typical Socio-Economic Factors Based on Satellite Remote Sensing Survey in Shigatse
Authors: Wang Hao , Chen Dong , Yang Jinzhong , Wen Jing , Jiang Cunhao , Liu Qiong , Xu Wenjia , Wang Jindong
Published: July 2023

Based on the 2019 satellite remote sensing data, the survey was conducted on the open-pit stopes of the building sand mines in Shigatse, Tibet, and the relationship between the number of stopes and the area, population and population density of the district/county, as well as the distribution characteristics between the main built-up areas, administrative villages and traffic roads at the county level were analyzed. This study tentatively links the open pit of building sand mine with human aggregation and human activity space, analyzes the possible correlation, distribution rules and change characteristics between it and the typical elements of social economy, and provides a research basis for improving the efficiency of mining administration in western China.
Analysis on Prediction Methods for Formation Pore Pressure under Multiple Pressure Formation Mechanisms
Authors: Jiao Yanhong , Wang Lihua , Ha Mingda , Xu Xin
Published: July 2023

There is abnormal fluid pressure widely distributed in Yinggehai-Qiongdongnan Basin, with abnormal zones extending from different depths, and the formation causes of abnormal pressure here are complicated. It is one of the three HTHP offshore regions in the world at present. Hence, drilling in this region is very difficult. It is discovered in drilling practices in recent years that, due to the multiple formation mechanisms of abnormal formation pressure in this region, the conventional pressure prediction model based on under-compaction theory is insufficient to explain the abnormal high pressure suddenly occurring in the middle shallow layer in diapiric structure of Yinggehai-Qiongdongnan Basin, which causes very large deviation of pore pressure prediction before drilling. Based on the basic principle of improved Fillippone method and with the three-dimensional high precision seismic velocity field of geologic modeling inversion, the authors build a three dimensional pore pressure model of target block, extract the pressure slice of horizon and across the target well, analyze the other source pressure transmission possibly caused by formation connectivity, and import them into the mathematical model of pore pressure prediction, so as to attain the purpose of improving the precision of pore pressure prediction. This method has been well applied in pre-drilling pressure prediction for the HTHP block in the South China Sea, reaching a prediction precisi on above 95%.
Groundwater Environmental Impact Prediction: The Example of Thermal Power Plant
Authors: Wang Xuejie , Wang Lin , Liu Yanwen , Zheng Guoxia
Published: July 2023

With the rapid development of industry and the increasing population, the balance of groundwater resources has been seriously damaged in China. Quantitative prediction and assessment of the groundwater environment have become necessary for the rational development, use and protection of groundwater resources. Taking the thermal power plant as an example, based on the engineering characteristics and possible pollution of the proposed construction project, the mathematical model of groundwater pollutant migration is established, and the groundwater pollution is predicted by an analytical method. COD, ammonia nitrogen and diesel fuel were selected as predictors to predict the pollutant migration after 100, and 1000 days of pollution occurrence, respectively. The results show that the pollution range will gradually expand with time. After 1000 days, the migration distance of pollutants such as COD and NH3-N reaches 80m, and the influence distance of pollutants such as diesel oil will gradually weaken with time. If not controlled and managed in time, the leakage of pollutants can cause serious pollution to groundwater during the operation of the electric field.
Multiple Regression Analysis of the Impact of Command Environmental Regulation on Mining Industry Structure Based on Stata Software
Authors: Li Haiting
Published: July 2023

In this paper, the inter-provincial panel data of 30 provinces (excluding Xizang) from 2006 to 2017 are selected, the adjustment of the mining industry structure is taken as the explained variable, and the command type environmental regulation, technological innovation, foreign direct investment, enterprise access, mineral resource endowment and market demand are taken as explanatory variables to build a multiple regression analysis model. And stata15.0 software is used to analyze the influence of the command environmental regulation on the adjustment of the mining industry structure, and then put forward the relevant suggestions to optimize the command environmental regulation.
Research on Movement Monitoring and Law of Overlying Strata in Goaf Based on IMU Technology
Authors: Wu Shiliang , Chen Zhengwen , Xue Zheng
Published: July 2023

The overlying strata of the stope can be divided into low ( immediate roof ), medium and high strata according to the degree of influence of the mine pressure behavior of the working face. Among them, the pressure step distance of low rock strata can be judged according to the roof pressure appearance of hydraulic support, and the middle and high rock strata can not be accurately and intuitively determined only by theoretical calculation. Therefore, IMU is used to monitor the motion state and fracture distance of different layers, so as to study the relationship between them and periodic weighting. Firstly, the accuracy of monitoring effect and the error of monitoring data are determined by indoor test. Then, taking the 52507 working face of Daliuta as the engineering background, 3DEC software is used to assist the verification. The research shows that the IMU monitoring data meets the requirements of error and accuracy, and can accurately monitor the rock movement ; the movement period of rock strata at different heights is different. As the height of rock strata increases, the displacement distance of rock strata gradually increases, and the median rock strata play a key role in the movement of overlying rock strata. The periodic pressure monitored is twice the actual periodic pressure.
Study on CO2 Immobilization in the Environmentally Sound Treatment of Fly Ash
Authors: Zheng Xinyu , Wang Yitian , Cai Lankun
Published: July 2023

To improve the carbonation performance of fly ash, waste incineration fly ash was subjected to high-temperature alkali fusion-hydrothermal and other treatments. The results showed that the material prepared with 8 g of sodium hydroxide, 10 h of maturation, 100 °C and 10 h of hydrothermal temperature had the best ability to isolate carbon dioxide, 521 g/kg, while the fly ash could only adsorb 160 g/kg of carbon dioxide, which improved the isolation ability by 212.5%.
Spatio-Temporal Distribution of Earthquake Disasters in Qinghai Province of China Based on GIS
Authors: Sun Zhongyi , Liu Longqing , Hu Yu , Guo Luo
Published: July 2023

Qinghai Province is located in the northwest part of China, is part of Qinghai-Tibet Plateau, its special location, abnormal climate, is the frequent occurrence of earthquake disaster area. Under the background of global climate change, earthquake disaster research in Qinghai province is of great significance for ecological protection and disaster prevention. In this paper, the data of earthquake disaster with MS ≥ 5 in Qinghai Province from 1960 to 2022 are collected statistically, and the risk grade distribution map of earthquake disaster is made by using GIS technology with the county and city as the unit. The spatial and temporal distribution law of earthquake disaster is illustrated from the distribution of earthquakes over the years and the annual occurrence frequency. The results show that the earthquake disasters in Qinghai Province are mainly concentrated in the northwest and southwest areas, the central and northern areas are also relatively high distribution, among which Geermu city and Yushu City are more affected. In terms of time, earthquake disasters occurred frequently from 1990 to 2010, and the frequency of disasters decreased slightly from 2010 to 2020, but in the past two years, the geological activity is more frequent, and the disaster incidence is high.
Exploring Industrial Restructuring Pathways Based on Regional Carbon Productivity Variations: A Case Study of Jiangsu and Zhejiang Regions in China
Authors: Wang Zhaoqiu , Zhang Yong , Wu Bo
Published: July 2023

The reduction of carbon emissions has emerged as a critical issue that requires urgent attention in the Jiangsu and Zhejiang regions as environmental concerns continue to grow. This paper examined how to achieve carbon emission reduction through industrial restructuring. The influence rela-tionship between industrial restructuring and carbon emissions was investigated using the Kaya constant equation LMDI decomposition method, while the coefficient of variation (CV) method was utilized to explore practical ways of promoting carbon emission reduction through industrial re-structuring. Data on carbon emissions and the economy from 12 core cities and 24 industries in the Jiangsu and Zhejiang regions from 2010 to 2020 were analyzed. The key findings of this study in-dicate that economic growth remains the primary driver of local carbon emission growth, while industrial restructuring and carbon emission intensity changes exhibit both positive and negative effects on carbon emission growth. The inhibitory effect of industrial structure upgrading on carbon emission growth can be weakened by regional industrial isomorphism. Furthermore, regional dis-parities in carbon emission intensity exist among some industries in the Jiangsu and Zhejiang regions, and industrial restructuring based on carbon productivity variations has greater potential for emission reduction. The cities in these regions can encourage the development of industries with superior carbon productivity while regulating the growth of industries with inferior carbon productivity, allowing the optimal allocation of carbon emission credits from industries with lower productivity to those with higher efficiency, resulting in carbon emission reduction.
Identification of Microplastics and Non-Microplastics Released from Masks under Environmental Conditions
Authors: Ma Minglu , Xu Dongfang
Published: July 2023

Single-use plastic masks had been widely used in the background of COVID-19, which became the potential source of microplastics. This study focused on the release and characterization of microplastics and non-plastic microparticles from single-use surgical masks (SMs) under simulated environmental conditions. In this work, we found that most microplastics were released from SMs under UV exposure (120.00 ± 17.44 items/mask). Mechanical abrasion (76.00 ± 22.63 items/mask) and high temperature exposure (68.00 ± 0.00 items/mask) could also significantly promote the release of microplastics contrasted to the control groups (37.33 ± 8.33 items/mask). The main polymer types of microplastics were PP and PET. In addition, the total particles were released from masks as the order of mechanical abrasion (17.42 ± 2.25 × 103 items/mask) > UV exposure (5.12 ± 1.62 × 103 items/mask) > high temperature exposure (4.57 ± 3.47 × 103 items/mask) > control groups (2.83 ± 1.46 × 103 items/mask). Among them, there were varied and complex non-microplastics particles (22 kinds total) detected in the experiments. This study provides help to better understand the potential risk of microplastics and different component types of non-plastic microparticles released from masks under simulated environmental conditions.
Dynamic Optimization of Carbonization Process Parameters Based on Genetic Programming
Authors: Li Zhaowei
Published: July 2023

The properties of carbon fiber are closely related to the carbonization process, in which high temperature carbonization is the key factor affecting its strength, modulus and other properties. In order to solve the problem that it is difficult to adapt to the complex industrial production environment and the dynamic factors existing in the carbonization process, taking the furnace temperature and heating rate of high temperature furnace as decision variables, energy consumption and yield as optimization objectives, and element temperature as dynamic factors, the dynamic optimization model of carbonization process parameters is established and the validity of the model is verified. Aiming at the parameter optimization problem of carbonization process in uncertain environment, a dynamic multi-objective optimization algorithm of carbonization process parameters based on genetic programming and knowledge transfer is proposed. And compare it with other latest algorithms to prove its efficiency and advantages.