bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the Mechanism of Breakwater Damaged by Typhoon Waves under the Background of Climate Change
Authors: Luan Yingni , Yin Zegao , Chen Hanbao 
Published: January 2021

Abstract
Typhoons are violent storms that occur in the tropical oceans of the Northwest Pacific and South China Sea. The waves caused by typhoons are often the strongest dynamic on the coast. The south-eastern coast of China and Japan is in the most frequent and severe area affected by typhoons, and typhoon waves often reach more than 10m. Based on many years’ coastal wave survey data in Japan, it was shown that typhoon waves have been continuously strengthened in the past 100 years, and typhoon tracks and duration have also changed. During the “Mangkhut ” typhoon, many projects along the south China coast were damaged by typhoon waves. Simulation result of the typhoon waves caused by the typhoon showed that the designed wave conditions were exceeded. The physical model is used to reproduce the situation of the breakwater being destroyed by typhoon waves, and analyses the failure mechanism.
Effect of river ecological restoration by symbiotic system of aquatic plants
Authors: Xiao Huan , Jia Jianna , Chu Qiang , Liu Liankun 
Published: January 2021

Abstract
Integrated effects of three different combination of aquatic macrophytes community (emergent, floating-leaved and submerged species) on river ecological restoration were investigated. LNH (Lythrum salicaria L, Nymphaea L and Hydrilla varticillata) showed the best performance in terms of COD removal yet LNV (Lythrum salicaria L, Nymphaea L and Vallisneria natans (Lour.) Hara) ranked first in terms of TN removal and TP removal. Due to the significant distinction of LNV on TN removal, LNV was suggested as the best option for river ecological restoration using combination of aquatic macrophytes community. A drastic reduction of pollutants in the early phase of treatment was observed for both COD and nutrition removal process. However, the timing of drastic reduction for COD was Day 5, while that of TN and TP was Day 17. Absorbtion and phytoremediation were the main process that contribute to the rapid removal of pollutants.
Threat assessment of Tianjin Qilihai wetland from human activities based on principal component analysis
Authors: Chu Qiang , Liang Baocui , Peng Shitao , Zheng Tianli , Li Guoguang , Zhang Kailei , Liu Liankun , Jia Jianna 
Published: January 2021

Abstract
Tianjin Qilihai wetland is an important wetland nature reserve in north China, which has important ecological value. Over the last few decades, the Qilihai wetland has been developed by human on a large scale, and the natural ecosystem has been seriously disturbed by human activities. In this study, principal component analysis was conducted on 7 indicators that may have potential impacts on the Qilihai wetland from 2013 to 2017 to assess the threat of human activities to the wetland area. The results show that from 2013 to 2017, the impact of human activities on the Qilihai wetland is increasing year by year, among which the industrial development, transportation and the increase of human activities around the wetland may be the main threat for the wetland.
A novel approach for measuring the black level of the ship smoke
Authors: Hu Jianbo , Peng Shitao , Deng Mengtao 
Published: January 2021

Abstract
With the development of the economy, more and more attentions have been paid to the air pollution in China. As a vital means in transportation, the inland-waterway and sea ships possess many incomparable advantages. In the meanwhile, the air pollution caused by ships brought great troubles to the coastal environment. China has begun to strengthen environmental monitoring along the coastline. As a major form of air pollution, the black smoke exhausted by ships bothers the living environment. In this paper, a novel approach is proposed to measure the black level of ship smoke. Moreover, the proposed method is running on the App installed on Android mobile operating platform, which could reach the goal of black level measurement via a precise and convenient manner. Therefore, the proposed approach cloud well facilitates environmental monitoring and protection.
Preliminary Study on Spatial and Temporal Distribution and Behavior of Tourists in Beihai Park in Winter
Authors: Sun Jiahui , Liu Ge , Li Jingyi , Zheng Tianli 
Published: January 2021

Abstract
Tourists are the main users of the park, whose spatial and temporal distribution and behavioral characteristics are the most real reflection of the construction of the park environment. Tourists in Beihai Park were selected as the research object. Through field investigation and interview investigation, the main behavior characteristics of tourists in different time and space in winter were studied. Finally, from the perspectives of tourists relation with time and space, we analyze the existing problems, understand the causes of these phenomena, and then put forward the corresponding countermeasures and suggestions, and make suggestions on the construction and management of such parks.
A compound artificial nest designed for oviposition of various fish
Authors: Huang Wenbo , Qiu Ning , Zheng Tianli , Sun Jiahui 
Published: January 2021

Abstract
Due to the influence of human factors and natural factors, the oviposition grounds and living environment of fish have been seriously damaged, and the decline of fishery resources is obvious. In recent years, artificial fish nests are widely served as a good means to restore fisheries resources and their degraded habitats, summarizes the materials, structure, nesting methods and existing problems for artificial fish nest, according to the artificial fish nest which is complicated to make, has a short service life and the existing artificial fish nest only aiming at the shortcomings of the herbaceous oocytes, we designed a compound artificial fish nest. The complex artificial fish nest consists of a frame, which is provided with two kinds of soft and hard egg adhesive medium to provide ecologic spawning conditions for grass spawning, gravel spawning and water spawning fish whose spawning ground is damaged, so as to increase and improve the population structure and quantity of wild fish.
Wind Environment and Loading Mitigation Effects on Coastal Enclosed Coal Yards with Porous Gables
Authors: Su Ning , Peng Shitao , Ye Yin , Hong Ningning 
Published: January 2021

Abstract
In order to prevent dust emission, coastal coal yards are enclosed by coal sheds. The dust suppression rate increases as the closure of the coal shed by sacrificing the ventilation rate. Adopting porous gables may provide a balance between natural ventilation and dust suppression as well as mitigate the aerodynamic loading effect. Through wind tunnel tests and numerical simulation, the present research take an practical coastal power plant coal yard as an example to illustrate the natural ventilation, dust suppression and aerodynamic loading mitigation effect quantitatively. The results have shown that, with a favourable gable prositiy of 30%, the natural ventialtion rate can be ehanced from 0.7 to over 2.0 times/hour compared with solid gables. The dust supression could be increased from 56% up to 80% compared with open gables. The unfavorable extremum aerodynamic suction coefficients on the central area and edges of roof are reduced by 20% and 70% respectively. The results provide a supportive evident that adopting prorous windbreak gables is a environemntal friendly and economic construction scheme for coastal enclosed coal yards.
The microbial community composition and population change during bioremediation of uranium tailings
Authors: Chuiyun Tang , Juan Zhong , Ying Lv , daozhi Ma , Mingjiang Zhang , Jianlei Wang , Xingyu Liu 
Published: January 2021

Abstract
Uranium tailings produced in the process of uranium mining and metallurgy are an important source of uranium pollution, and pose a serious threat to the ecosystem and human health. In this study, Bacillus sp. as a functional bacterial when the uranium tailings were remediation in situ at 30°C and pH 6.5, aim to explore the response of the indigenous microbial community to environmental changes during the restoration process. The result indicted that after 14 days of remediation, the lowest uranium concentration obtained is 25.29mg/L. Next, 16s rRNA gene sequencing was used to reveal the dynamic changes of the microbial community structure during the competition process, Firmicutes and Proteobacteria are the two dominant phylm in the environment, the total highest contribution rate is 97%. Additionally, a significance present of sulfate-reducing bacteria such as Desulfotomaculum, Anaerocolumna, Burkholderia were detected in the U-treated microcosms comparison with repair initial. The results of this paper show that Bacillu sp. can be used as a functional bacteria to remediation the uranium tailings, and it is beneficial to the growth of functional microorganisms such as sulfate-reducing bacteria in the environment.
Rural Domestic Sewage Treatment Technology Application in Conghua District of Guangzhou under the Rural Revitalization Strategy
Authors: Li Xiuyun 
Published: January 2021

Abstract
The paper analyzes the current situation and characteristics of rural domestic sewage treatment in Conghua District, Guangzhou city. It takes the river system as the vein and the administrative village of characteristic town as the node, which pays great attention to the overall planning of the water environment. In this area, the rural domestic sewage on both sides of the Liuxi River is selected as the research object, and the rural sewage treatment of the Yadong River Basin is taken as a project case to explore the applicability of rural sewage treatment technology, hoping to achieve a beautiful countryside with clear water and beautiful scenery, and then promote the revitalization and development of the beautiful village, which provides reference value for ecological and social benefits.
Decoupling Analysis of the Relationship between Environment Production and Economic Development in Chongqing
Authors: Tao Aixiang 
Published: January 2021

Abstract
In recent years, China’s ecological civilization construction has made great achievements, but there are also a series of problems. The main reason is the disharmony between economic development and ecological civilization construction. This paper uses decoupling theory to study the relationship between ecological civilization construction and economic development in Chongqing. The conclusion is as follows: the ecological civilization construction and economic development in Chongqing are in the decoupling state. In the future, Chongqing should focus on improving the quality of human resources and transforming the economic structure, and increase the investment in education and science and technology, so as to improve the level of education and science and technology, and realize the coordination of economic development and ecological civilization construction.
Effect of low temperature on the performance of UASB reactor for municipal wastewater treatment: recent advances and future perspectives
Authors: Wang Zhenyu 
Published: January 2021

Abstract
Upflow anaerobic sludge blanket (UASB) reactor is a widely used anaerobic treatment technology, which is essential in municipal sewage treatment, in tropical and subtropical areas. However, UASB reactors have been underutilized in low-temperate zones due to the poor performance of UASB reactors under psychrophilic conditions. This study has three primary purposes: to review the performance of UASB reactors with different parameters, to describe the limiting factors at low temperatures, and to prospect the future solutions. In the low-temperature environment, lower COD removal efficiency and production of methane in the UASB reactor have been observed in various studies. The key limiting factors are increased dissolved methane, decreased activity of methanogens and hydrolytic bacteria. This article proposed that five technologies could reduce the impact of low temperature on the treatment of municipal wastewater by the UASB reactor, which are denitrifying anaerobic methane oxidation (DAMO), direct interspecies electron transfer (DIET), bio-electrochemical systems (BES), pre-hydrolysis, and degassing membrane (DM). These technologies are promising to be developed into highly-efficient engineering strategies for treating municipal wastewater in the UASB reactor at low temperatures in the future.
Study on high efficient aromaticity degrading bacteria in oily sludge
Authors: Zhao Chuanxin , Gu Qiamin , Chen Gaoyun , Wu Weihui , Qi Xiuli , Liu Min 
Published: January 2021

Abstract
The degradation of oily sludge is an important subject in the field of environmental remediation, especially the degradation of aromaticity in oily sludge, because its harm to human body is immeasurable, it is urgent to find an effective method to degrade oily sludge. Taking the oily sludge of Karamay oil field in Xinjiang as the research object, the chemical composition of the oily sludge was determined through the analysis of the chemical composition of the oily sludge. A strain was isolated from nearby contaminated soil, and was identified by ultraviolet spectroscopy, liquid chromatography, Gas chromatography-mass spectrometry, and other methods, it was found that the strain had a good degradation ability to aromaticity, with a degradation rate of 98.2%.
Preliminary Study on the Landscape Design of Sponge Campus Based on LID Concept——A Case Study of landscape design in Wuhan University of Technology
Authors: Wu Junsha 
Published: January 2021

Abstract
In recent years, with the rapid development of the research and application of sponge city, colleges have carried out the construction of “sponge campus” with the support of the state. Based on the background of the sustainable development of the campus, this paper takes the concept of LID as the starting point, combs the related concepts and evaluation criteria of the sponge campus, takes the landscape design of the West Campus of Wuhan University of Technology as an example and discusses the key points of landscape design under the campus LID model from the macro and micro perspectives. In addition, it focuses on the discussion of macro-zoning planning, landscape rainwater collection system, plant selection and microclimate, in order to provide references for the sustainable use of campus resources and landscape design.
Engineering design of landfill leachate treatment system in a waste incineration plant in Chengdu
Authors: Ke Li , Fang Wang , Zuoming Yu , Xinsheng Lu 
Published: January 2021

Abstract
The engineering design and operation of landfill leachate treatment system in a waste incineration plant in Chengdu are systematically introduced. The engineering design experience of UBF+MBR+NF+RO process for leachate treatment of incineration plant and advanced oxidation process for treatment of nanofiltration concentrate are summarized, which provides reference for engineering design of leachate treatment in incineration plant. The operation results show that the effluent can meet the “make-up water for open circulating cooling water system” in The Reuse Of Urban Recycling Water—Water Quality Standard For Industrial Uses (GB/T19923-2005), and the effluent treated by nanofiltration concentrate can meet the corresponding standards in Table 2 of Standard For Pollution Control On the Landfill Site Of Municipal Solid Waste (GB16889-2008).
Research and application of polycarboxylate water reducer for precast components
Authors: ChenYanCun  
Published: January 2021

Abstract
Aiming at the ever-developing precast structural system, this paper developed a new type of polycarboxylic acid mother liquor, and compared it with other polycarboxylic acid mother liquors combined with various early strength agents and defoamers to study and analyze the impact on precast concrete components and engineering applications effect. The test results show that this type of water reducing agent can increase the softness of high-grade concrete and improve the workability of concrete. It can be widely used in pipe piles, subway segments and prefabricated construction projects.
A Summary of Wellbore Fluid Accumulation and Drainage Gas Production Technology in Gas Wells
Authors: Chen Ming , Sun Junyi , Gao Ersi , Tian Haonian 
Published: January 2021

Abstract
The problem of fluid accumulation in the wellbore of a gas well is an important factor that affects the efficiency of gas production. If the fluid accumulation is serious, the production of the gas well will decrease, and then the gas well will be flooded and stop production. It is necessary to drain the wellbore fluid to the surface in time. This article analyzes the causes and diagnostic methods of wellbore fluid accumulation, and introduces conventional fluid drainage technology such as optimization of tubing, bubble drainage, gas lift fluid drainage and mechanical fluid drainage, aiming at improving the liquid carrying capacity of gas wells and improving the gas recovery efficiency of gas wells. Examples illustrate the feasibility of drainage technology and restore normal production of gas wells.
Effects of calcium and phosphorus on aluminium phytotoxicity in soil-Chinese fir system
Authors: Xu Xiaoli , He Si , Yang Huiqin , Zhang Jinbiao 
Published: January 2021

Abstract
The potential toxicity of soil active aluminium (Al) on Chinese fir was an urgent problem due to the global soil acidification. The aim of this paper was to study the effects of calcium and phosphorus on Al phytotoxicity in soil-Chinese fir system by using soil culture. One year old seedlings of Chinese fir were used as plant materials. The changes and relationship of pH and active form of Al in rhizosphere soil, leaf Al and physiological indexes in seedlings of Chinese fir were analysed. The results showed that the soil pH of all treatments rose at different degree, while the content of exchangeable Al in soil was decreased under different treatments of calcium and phosphorus as compared with the control. The results also showed that the content of Al and MDA in leave was decreased, while an increase in soluble protein content in leave was observed. It was concluded that the alteration in soil rhizosphere environment may be the main factor improving physiological indexes, consequently alleviating Al phytotoxicity in soil-Chinese fir system.
How COVID-19 Impacted PM 2.5 and Air Quality in China’s Main Cities
Authors: Tang Xuening , Yang Bokai , Wu Zhechen 
Published: January 2021

Abstract
The air quality in modern cities is one of the topics that people are very concerned about, due to its impact on people’s health and production. There have been many studies on air quality improvement and transmission mechanisms, showing that proper measures can improve air quality efficiently. Under the unexpected COVID-19 time, lots of measures were taken by the government, and the question of whether those strict measures have somehow influenced the local air quality remains. This article mainly combines some relevant policies and behaviors during the outbreak of COVID-19 to explore whether this epidemic has an impact on emissions, and to observe whether the sub-index PM2.5 representing air quality is changed. Based on assessing the cause of air pollution in each city and evaluating the policy implemented to prevent COVID-19 from spreading, the topmost effective policies that reduce air pollution are preventing residents’ transportation, reducing deliveries, and shutting down heavy industry factories.
Synergistic Catalytic Effects of Fe-Based Bimetallic Nanocatalyst and Non-thermal Plasma on Removal of Acetaldehyde
Authors: Peng Xiaoying , Gao Yan , Zhang Zhanchao , Zhang Wenke , Li Hui 
Published: January 2021

Abstract
Acetaldehyde is a typical volatile organic compound (VOC) releasing from food waste. Fe-based bimetallic nanocatalyst combined with non-thermal plasma (NTP) for acetaldehyde catalytic oxidation is an high efficient and energy-saving method. The pore structure parameters of FeCoO
x
TiO2, FeCeO
x
TiO2 and FeMnO
x
TiO2 bimetal nanocatalysts were analyzed quantitatively by N2 adsorption-desorption test. The phase composition and active element valence of three Fe-based bimetallic nanocatalysts were analyzed and compared by XRD. The experimental data showed the microporous and mesoporous structures of FeCoO
x
bimetal oxides were more complete, and the elemental dispersibility was better. In the non-thermal plasma-catalyst (NTPC) system, the introduction of Fe-based bimetallic nanocatalyst significantly improved the catalytic efficiency of acetaldehyde and catalytic selectivity of CO2. FeCoO
x
TiO2 had the best performance among these three nanocatalysts with acetaldehyde catalytic conversion rate reaching 87.5% and CO2.selectivity higher than 90%, under the specific energy density (SPD) of 180 J. L-1, which was less than half of the energy consumption in a single non-thermal plasma catalytic reaction. By optimizing the microstructure and elemental composition of Fe-based bimetallic nanocatalyst, it is expected to be an effective method to improve catalytic performance, which is also a promising approach for improving VOCs removal efficiency and reducing energy consumption.
Research on Reservoir Water Quality Prediction Based on Grey Model
Authors: Zhou Yi , Hu Jiarui , Xie Mengfan 
Published: January 2021

Abstract
Combining the gray model to predict the water quality of Qingshan Reservoir, the analysis results show that the grey model has good applicability for the prediction of reservoir water quality. The prediction errors of total nitrogen, total phosphorus, COD5, and ammonia nitrogen are all within 30%, meeting the accuracy requirements of water quality prediction. The research results have important method reference value for reservoir water quality prediction.
A portable NDIR sensor for rapid detection of hydrogen cyanide in environment
Authors: Ren Lijun , Ma Bin , Liu Guohong , Li Jian , Xiao Yanhua , Li Danping , Liu Meng , Gao Ying , Kuang Peng 
Published: January 2021

Abstract
Cyanide pollution refers to the environmental pollution caused by cyanide and its compounds. As a derivative of cyanide, the leakage and excessive discharge of hydrogen cyanide will cause great harm to the surrounding animal and plant environment. Rapid detection of hydrogen cyanide can avoid some unnecessary environmental pollution. Based on the principle of non dispersive infrared(NDIR) detection, the infrared absorption of hydrogen cyanide at 3.0 μm and 14.3 μm was selected as the qualitative and quantitative basis. Two NDIR sensors were designed to detect 3.0 μm and 14.3 μm infrared absorption respectively after assembly. The standard curve between the concentration of hydrogen cyanide and the voltage response value was determined, and the performance of the two sensors was tested. Their detection ranges is 10ppm-3000ppm and 22ppm-3000ppm respectively. The maximum response time is less than 11s and RSD < 2%. After comparing the performance of the two sensors, the display values of the different sensors were processed. Finally, the two sensors were assembled into one sensor, the hydrogen cyanide concentration was displayed with one indication and different gases were mixed with hydrogen cyanide to pass into the gas chamber, which improved the anti-interference ability.