bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical simulation and regulation analysis of subsurface flow for an underground reservoir in Weihai
Authors: Ni Ludong , Wang Weiping , Zhao Weidong , Qu Shisong , Sun Xiuxiu 
Published: January 2021

Abstract
With the development of social economy, the contradiction between water supply and water demand is increasing. In order to alleviate this contradiction, an underground dam is proposed to be constructed in the downstream of one river for intercepting subsurface flow and increasing conjuctive utilization of surface water and groundwater. According to the hydrogeological condition of the downstream of one river, a groundwater flow numerical model through Visual Modflow was built to analyze the regulation and storage of groundwater for underground reservoir. The conclusions are as follows: the underground reservoir of a River has great potential for exploitation; the water regulation by storage of wet, normal, dry and special dry years is 23.928 million m3, 20.565 million m3, 17.43 million m3 and 10.128 million m3, respectively, and after the construction of underground reservoir, river has a great potential for development; the extraction scheme of 36 wells with a flow rate of 0.015 m3/s for the whole year is a more suitable scheme plan.
Application of Nanomaterials in Repairing Heavy Metal Pollution Soil
Authors: Chen Su , Chen Ying , Feng Tianzhen , Ma Hongyue , Liu Xiaoying , Liu Ying 
Published: January 2021

Abstract
Due to the acceleration of industrialization and urbanization, a series of environmental problems have arisen, among which heavy metal pollution in the soil environment is difficult to be naturally transform into harmless substances, which has led to food security, life safety and other issues. Heavy metal contamination in soil has become one of the key issues for scholars at home and abroad. This paper mainly introduces the present situation and harm of heavy metal pollution in soil. The research status of nanomaterials in heavy metal contamination of soil was reviewed. The application of nano-materials combined with phytoremediation was discussed. The effects of nanomaterials on soil enzymes and plant enzymes were introduced. The future research directions of nanomaterials in remediation of heavy metal contaminated soils are prospected. It provides a theoretical basis for the development of practical, efficient and safe remediation technology for heavy metal contaminated soil.
Research on Chenopodium in ancient Southwest China
Authors: Gao Yuanyuan 
Published: January 2021

Abstract
Located in the southwest hinterland of China, southwest China has a diversity landform consists of plains, mountains, intermountain basins, plateaus. Since the late Neolithic, people living in southwest China have created diverse cultures. As for the basic subsistence strategies, agriculture facilitated the long-term occupation of settlements. While compared to central China, the ecological environment and geomorgraphy in southwest China seem more tough. According to the archaeological evidence, the Chenopodium has been used in most of the archaeological sites. Chenopodium has been cultivated and domesticated in northeast America since Neolithic until nowadays, it is still used in most areas of the world. Wheather it was domesticated in ancient China is still not clear, the archaeobotanical evidence indicates that since the late Neolithic period, the genus of Chenopodium has been exploited by ancestors in southwest China, which provides the most direct evidence for the utilization of Chenopodium. The utilization of weeds such as Chenopodium in ancient southwest China suggests the diversity acquirement methods for ecological resources, which is of great significance to understand the early civilization process in ancient southwest China.
Temporal and spatial distribution characteristics and causes of sea fog in Jiangsu coastal area
Authors: Yun Yu , Xinxin Gao 
Published: January 2021

Abstract
Based on the observation data of Binhai and Lvsi stations in the past ten years, this paper analyzes the temporal and spatial distribution characteristics and formation conditions of sea fog along the coast of Jiangsu Province, and obtains some rules, such as: winter and spring are the seasons of frequent sea fog along the coast of Jiangsu Province, when the relative humidity is≥85%, the temperature difference between water and air is within plus or minus 8°C, when the southeast wind is easier to form fog, and the wind speed generally does not exceed 5 levels. In addition, the sea fog in Jiangsu coastal area can be generally divided into inverted trough type, low pressure type, cold air type and high pressure type, and it is easy to form fog when inverted trough. Continuous multi-day sea fog is often the continuous influence of various weather situations. All these provide ideas for the prediction of sea fog in Jiangsu coastal area.
Distribution characteristics of heavy metals in surface sediments of alkaline lake in Plateau
Authors: Liu Jumei , Li Yanlin , Liu Shuangshuang , Wang Yu , Zhou Li , Yang Qian , Ren Yanxia , Si Wantong , Li Qiang 
Published: January 2021

Abstract
Hamatai lake represents important saline and alkaline resource in sandy land of Inner Mongolia plateau. In this study, the pollution degrees of heavy metals (Cu, Zn, Pb, Cd, Cr, Ni, Mn, As) in sediments of Hamatai Lake were analyzed, based on the national soil background value and the soil background value of Inner Mongolia, and single factor and potential ecological risk index. The results showed that the concentrations of heavy metals (Cu, Zn, Cu, Pb, Cd, Cr, Ni, Mn, As) were 15.22, 33.16, 5.32, 0.80, 61.60, 16.40, 286.50, 20.21 mg kg-1, respectively. Among them, the contents of Cd in eight samples went beyond the soil background value of Inner Mongolia, the national soil background value and the screening value. Meanwhile, Cd had the highest potential ecological risk through potential ecological risk assessment. Overall, the potential ecological risk of the central area of the lake was significantly greater than that of the surrounding area. The results of this study can provide a scientific basis for the prevention and control of heavy metal pollution in alkaline lake of Plateau in arid area.
Effect of managed aquifer recharge on drawdown cone in plain area of Linqing City, China
Authors: Li Wenliang , Du Juan , Wang Weiping , Qu Shisong , Sun Xiuxiu 
Published: January 2021

Abstract
The Yellow River flood plain in northern of China, affected by the low precipitation and the large amount of well irrigation, is facing the ecological problems of serious groundwater overdraft and expansion of drawdown cone area. Taking Linqing city of Shandong Province as an experimental area, the technical scheme and parameters of Open channel-Underground perforated pipe-Shaft groundwater recharge system were designed by combining theoretical calculation and field test, and the effect of recharge was observed and analyzed. The results show that this project has increased groundwater amount of 52310.82m3 by water diversion for 7 days compaired with existing canal system, accounting for 60.7% of the total groundwater recharge. This recharge technology can effectively increase the amount of groundwater replenishment and raise the groundwater table as well as scope of groundwater recharge. It has the advantages of no energy consumption, no land occupation, rechargeability, and drainage. Thus, it is of great significance to the recovery of groundwater drawdown cone area and the comprehensive treatment of drought and waterlogging.
A Review of Mass Transfer Model of Supersaturation Total Dissolved Gas Downstream at High Dam
Authors: Zhang Dan , Yang Huixia , Liu Cai-hong 
Published: January 2021

Abstract
The total dissolved gas (TDG) supersaturation observed in a spillway that flows downstream various hydraulic structures has long been recognized as having a negative environmental effect on fish and aquatic organisms. This paper focuses on learning the mass transfer of supersaturation total dissolved gas downstream and the rule of mass transfer between air-water interfaces. Besides, the three main coefficients of mass transfer are concluded: the surface mass transfer coefficient, the bubble interface mass transfer coefficient, and the dissipation coefficient and relevant transport process model. These can provide a foundation to analyze the supersaturation of high dam in near future.
Study on Adsorption Performance of Lignite Activated Carbon for Coal Gasification Wastewater
Authors: Li Ruozheng , Ding Shaofeng , Fu Dayong , Liu Sufei 
Published: January 2021

Abstract
In order to ensure the excellent adsorption performance, this paper choosed lignite activated carbon to study the adsorption performance of typical pollutants phenol, indole and quinoline in coal gasification wastewater, and analyzed its adsorption performance under single matrix and co-substrate conditions. The experimental results showed that among the three kinds of organic substances, lignite activated coke has the strongest adsorption capacity for phenol, while the adsorption capacity for quinoline was relatively low. Under mixed matrix conditions, activated coke has strong adsorption selectivity for phenol and indole.
Study on fracture propagation and interaction mechanism during hydraulic fracturing
Authors: Zheng Peng , Zhou Desheng 
Published: January 2021

Abstract
With the widespread application of hydraulic fracturing technology, the corresponding numerical simulation methods have been rapidly developed, and we have a deep understanding about the fracture propagation trajectory during hydraulic fracturing at the same time. However, the fracture interference mechanism during hydraulic fracturing is still insufficiently understood. Based on linear elastic fracture mechanics and relevant fracture criterion, a simulation model was established to simulate the fracture propagation by using boundary element method. The interaction mechanisms between fractures are studied. Results show that hydraulic fractures will change distribution direction of formation stresses during propagation process, and asymmetric fractures tend to merge together during propagation. The reverse propagation phenomenon between two fractures in numerical simulation rarely exists in the actual formation. The analysis and research on the mechanism of crack propagation and interaction can provide a theoretical basis for the trajectory control of hydraulic cracks in the later period.
Removal of ammonia nitrogen from copper-loaded resin based on ligand adsorption
Authors: Chen Quanzhou , Si Wantong , Liu Jumei , Ge Xiaoxi , Yang Jun 
Published: January 2021

Abstract
A ligand adsorbent with strong selectivity towards ammonia nitrogen in solution was prepared by loading Cu onto the chelating resin of iminediacetic acid. The static adsorption results showed that the removal rate of ammonia nitrogen reached the maximum when the equilibrium pH of solution was 9.5-10. The presence of competing cations, such as Na+ and Ca2+, had no obvious effect on the optimal equilibrium pH, but had a certain inhibitory effect on the adsorption of ammonia nitrogen and Ca2+> Na+. The adsorption of ammonia nitrogen by copper-loaded resin was in line with the Langmuir isothermal equation, and the maximum adsorption capacity of ammonia nitrogen was 44mg/g(dried copper-loaded resin).
Study on the Differences of Urban Forestry Demands of Citizens in Beijing, Shanghai and Guangzhou, China
Authors: Guan Xiang , Jia Yuqing , Hou Yilei , Zhang Zhenming 
Published: January 2021

Abstract
From a global perspective, urban forestry plays an important role in improving the living environment of urban citizens, expanding the space for urban development, improving human health and well-being, and promoting sustainable economic and social development. In China, Beijing, Shanghai, Guangzhou and other cities have made remarkable achievements in urban forestry development in recent years, which changes people’s demands for urban forestry accordingly, especially for citizens living in the large cities. The degree and dimension of the demands for cities are constantly increasing. In order to study the public demands for urban forestry in the large cities of China, this paper selects Beijing, Shanghai and Guangzhou as the research area, using the method of single factor analysis of variance from gender, age, education, marital status, health status to discuss the three urban citizens in urban forestry total demand, education demand, health demand and recreation demand. The results show that :(1) There is no gender difference in the demand for urban forestry between Shanghai and Guangzhou. Only there is a difference in the educational and cultural demand for urban forestry between males and females in Beijing. And the educational and cultural demand of females is slightly higher than that of males. (2) Unmarried people in the three cities generally have higher educational and cultural demand for urban forestry than married people. (3) In different cities, people of different age groups have different demands for urban forestry. Beijing citizens lay more stress on the educational and cultural demand of urban forestry, Shanghai citizens lay more stress on the recreational demand of urban forestry and Guangzhou citizens lay more stress on the health demand of urban forestry.
Study on Environmental Equity in Beijing-Tianjin-Hebei Region
Authors: Li Cui 
Published: January 2021

Abstract
In recent years, although China’s economy has developed rapidly and the environment has improved, there is a big gap between regional economies and environmental pollution levels, and environmental unfairness still exists. Taking Beijing-Tianjin-Hebei region as an example, this paper measures the environmental fairness in Beijing-Tianjin-Hebei region from the economic contribution coefficient, population bearing coefficient and green burden coefficient. The results show that Tianjin in Beijing has better fairness, while Hebei has worse fairness. Finally, some suggestions are put forward to promote the coordinated development of environment in Beijing-Tianjin-Hebei region.
Emergency treatment technology and case study of sudden environmental pollution caused by oil spill in river basin
Authors: Chen Sili , Chang Sha , Wang Xiaojun , Wang Ji , Zhang Zhengke , Pan Chaoyi , Guo Qingwei 
Published: January 2021

Abstract
Based on the characteristics of sudden oil spill environmental pollution in a river basin, this paper presented a method for emergency treatment of sudden oil spill environmental pollution in a river basin by analyzing and summarizing a large number of oil spill emergency treatment cases. Stratigies such as pollution source blocking, sluice dam controlling and pollutant interception were applied to control and eliminate the pollution situation. Besides, typical oil spill emergency response cases were picked and analyzed to provide a reference and guidance for the emergency treatment of oil spill incidents in China.
Research on the Mechanism of Foreign direct investment on environmental pollution-Based on regression model of threshold effect
Authors: Li Tingting 
Published: January 2021

Abstract
The panel data of all provinces in China from 2010 to 2018 were selected and the threshold effect regression model of FDI impact on China’s carbon emissions was constructed by taking urbanization level as the threshold variable. The results showed that FDI’s impact on China’s carbon emissions had obvious double threshold effect of urbanization level. Therefore, according to the urbanization development level, each region should introduce foreign direct investment according to local conditions, give full play to its positive effect on carbon emission reduction, and realize green, low-carbon and sustainable development.
A Review of Suitable Substrates for Hydrogen Production in Microbial Electrolysis Cells
Authors: Tang Jerry Huayang 
Published: January 2021

Abstract
Microbial electrolysis cells (MECs) represent a renewable hydrogen production technology that offers the possibility of converting wastewater to hydrogen through a bioelectrochemical process. Particularly, the MEC substrate has a significant effect on the performance of MECs, and in this review, the performances of over 30 substrates examined since 2015 are summarized and compared. It was evident that popular MEC substrates include dark fermentation effluents, pyrolysis products, and raw wastewaters. Additionally, the different MEC substrates investigated yielded different MEC performances, indicating that further studies are required before MECs can become a mature technology for up-scale applications.
Status and Measures of Preventing and Controlling Environmental Risks in Tailing Impoundment
Authors: Xinkuan Li , Jianxiong Kang 
Published: January 2021

Abstract
Nowadays, the situation of environmental pollution monitoring and emergency management of tailings impoundment is becoming more and more severe mainly due to the high incidence of environmental emergency in tailing impoundment. Based on which, this paper takes the environmental risk of tailing impoundment as the main research object, focusing on status and corresponding measures of its prevention and control. Hopefully, it will be helpful.
Ways to Protect Existing Buildings with Low-Cost Methods to Deal with Environmental Changes
Authors: Wang Zhiyang 
Published: January 2021

Abstract
Different methods are used to reinforce existing buildings to cope with more frequent extreme weather. As the frequency of extreme weather increases, the requirements for wind resistance, flood resistance and resistance to other natural disasters required by buildings have also increased. This is usually accompanied by the increase in construction costs and most of the existing buildings do not have the disaster resistance of new buildings. The proposed need to strengthen existing buildings to reduce costs and deal with disasters. In the following paragraphs, different reinforcement methods have been proposed for different natural disasters, such as wind disasters and floods, and verified by testing the physical structure resistance. The conclusion proves that the wind resistance and flood resistance of existing buildings can be improved through relatively inexpensive additional simple structures.
Nearshore Wave Propagation Characteristics in Steep Slope Zone of South Java Sea
Authors: Zhang Yajing , Chen Hanbao , Xu Yanan 
Published: January 2021

Abstract

NCEP provided the ocean wave long term data, one year nearshore wave surveyed at -20m water depth of South Java coast, the relation between two series synchronous data were analyzed, the wave direction are all prevailing from S to SSW. The wave in India Ocean is mostly swell, the significant wave height and period changed obviously and disorder while it is propagating on steep slope from deep water to shallow water. The wave spectrum were calculated, H0
and Tp
were adopted for analyzing wave propagation characteristics from global wave position to survey position. The survey wave H0
and Tp
have good relation with global wave. The reason of statistic Hs
and Ts
decreasing is dispersion on shallow water, which is shown from water surface elevation process.
Feasibility Study on Shore-based Treatment Technology of Ship’s Ballast
Authors: Zhang Kailei , Chu Qiang , Liu Liankun , Jia Jianna 
Published: January 2021

Abstract
The International Convention on the Control and Management of Ballast Water and Sediment on Ships officially entered into force for our country on January 22, 2019. The Convention stipulates a series of requirements for the compliant discharge of ballast water. Compared with the ship’s own ballast water treatment facility, the ballast water bank-based treatment facility has the advantages of economy, environmental protection, and stability. In order to improve my country’s ability to implement the Ballast Water Convention and promote the construction of my country’s green ports, discussion and research on ballast water bank-based treatment technologies are necessary. This article describes the main methods of receiving and processing ship’s ballast on water and shore, analyzes the prospects and existing problems of receiving and processing ballast on water and on shore, and puts forward relevant suggestions for research on ballast water and shore treatment technology.
Research on cleaner production potential of pipe pile industry based on material energy flow analysis
Authors: Qi Zhaoyu , Liu Feng , Deng Mengtao , Hu Jianbo 
Published: January 2021

Abstract
According to the characteristics of the PHC pipe pile production and taking the cleaner production audit of a PHC pipe pile company in Tianjin as an example, the cleaner production potential was analyzed in detail in the aspects of raw material and energy consumption, technical process and equipment, pollutant emission and so on. The material and energy balance analysis were carried out. This work provides reference for the development of cleaner production of PHC pipe pile industry.
Acute Toxic Effects of Petroleum Hydrocarbons in Sediment on Maoctra veneriformis and Its Antioxidant Enzyme Activities
Authors: Xiong Hongxia , Zhao Shuwei , Peng Shitao , Wang Xiaoli , He Lijun 
Published: January 2021

Abstract
In order to clarify the toxic effects of petroleum hydrocarbons in sediments on bivalve mollusks, the acute toxicity and effects of petroleum hydrocarbons on antioxidant enzyme activities were studied using Maoctra veneriformis as a test organism. Our results showed that the health status of the Maoctra veneriformis gradually weakened with the increase of exposure time and concentration of petroleum hydrocarbon, and mortality occurred in the high-concentration group at the end of the exposure. The activities of peroxidase (POD) showed a trend of first decrease and then increase with the prolong of exposure time, and POD activity was significantly induced in some concentration groups at the beginning and the end of the exposure (P < 0.01). The activities of superoxide dismutase (SOD) generally decreased first and then increased as the petroleum hydrocarbons concentration increased. With the prolong of exposure time, the SOD activity decreased first and then increased and then decreased. Our results showed that petroleum hydrocarbons in the sediment produced a certain toxic effect on Maoctra veneriformis, and there was a certain time-dose-effect relationship between anti-oxidase activity and petroleum hydrocarbons. Meanwhile, petroleum hydrocarbons can produce significant induction or inhibition effect on anti-oxidase activity.
Study on An Enzyme Shampoo of Traditional Chinese Medicine
Authors: Yan Ni 
Published: January 2021

Abstract
This research rationally exploits Chinese medicine resources and develops a kind of Chinese traditional medicine enzyme shampoo, which is developed by utilizing the antioxidant and bacteriostatic properties of black soybean enzyme, and combining with nine-flavored plant ingredients including mulberry leaf, Semen Cuscutae, astragalus mongholicus, cacumen platycladi, angelica sinensis, fructus kochiae, cortex dictamni, fructus psoraleae, and folium artemisiae argyi. At present, the problem of traditional Chinese medicine enzyme preparation has been effectively solved, and preliminary experiments on external treatment of the scalp have been carried out, which proves that it has a better anti-dandruff and nourishing effect.