bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synergetic effects of iron-carbon micro-electrolysis integrating with other technologies
Authors: Zheng S M , Wang X Y , Chen C H , Kong H 
Published: November 2019

Abstract
The combination of iron-carbon micro-electrolysis (ICME) technology and other technologies is an important development direction for the treatment of refractory wastewater, which could overcome the disadvantages of each technology and combine the advantages of each technology. The synergetic effects of ICME combined with Fenton process not only save the cost of adding reagents, but also significantly improve the efficiency of the combination treatment. The advantage from the combination of ICME with ozone is due to plenty of hydroxyl radicals coming from ozone decomposition, which enhances the complex contaminants removal. The synergetic effects of ICME integrated with biological process include mainly two respects. One is that the galvanic cells produced around the ICME could readily convert complex organic compounds to biodegradable substrates, which is conducive to the degradation of pollutants by microbes. Another one is that the iron ions released from ICME possess great capability to promote the performance of the microbes to treat wastewater, for instance, mineral nutrients for microbes, electron transfer mediator, and vital components of enzymes. Accordingly, the integration of ICME with other technologies has great application prospect for refractory wastewater.
Design and application of micro-automatic permanganate index online monitor
Authors: Li W , Cheng L , Lv H , Guo K , Luo X K 
Published: November 2019

Abstract
In view of the current large permanganate index detection equipment, such as large volume, low automation, high reagent dosage and long detection time, based on sequential injection technique and spectrophotometry, the method for determining the permanganate index was improved, and designed a miniature automatic permanganate index online monitoring system. The design enables fully automatic detection and reduction of reagent volume through rational design of the detection process and structural layout, while reducing the volume and improving the detection efficiency. The permanganate index is compared with the technical requirements of HJ/T 100-2003. The relative standard deviation of the repeatability error is ≤±2.198%, the zero drift ≤±1.07%, the range drift ≤0.39%, the actual water sample contrast relative error ≤± 2.81%, total reagent volume 3 ml. The system is suitable for the determination of station, laboratory and floating permanganate indices.
A high-flux constructed wetland for tertiary treatment of brackish wastewater treatment plant effluent: Process performance and influence factors
Authors: Lin H , Na Y , Liu X W , Mao J H , Deng F 
Published: November 2019

Abstract
With the scarcity of water resources and environmental degradation of water bodies, tertiary treatment of wastewater and brackish water have become necessary in countries like China. Operational data from a constructed wetland (CW), treating an average flow of 27 thousand m3/d of secondarily-treated brackish wastewater, is analyzed in this study. At a salinity level of 2-8g/L (as Cl−), and an average hydraulic loading rate (HLR) of 1.08 m/d, the high-flux CW system had an average removal rate of 20.43% and 65.16% for NH4+-N and COD respectively, while tertiary treatment of total phosphorus (TP) and total nitrogen (TN) was less successful, indicating a background concentration in the system. Correlation analysis was done to investigate the influences of HLR, rainfall, temperature and chloride concentration on the treatment performance. Kinetic model fitting was done to determine reaction coefficients.
An evaluation model for the deep dewatering potential of municipal sludge based on PLS regression
Authors: Yu P R , Luo Y , Lin F , Li J G , Zhu X L , Zhang Z B , Liu M R 
Published: November 2019

Abstract
For constructing a new convenient and reliable system to evaluate the dewatering performance of sludge, the relationship between the water content of dewatered municipal sludge and its physicochemical properties was comprehensively investigated. Then, an evaluation and prediction model was established based on partial least squares regression (PLS), which could accurately predict the solid content of municipal sludge treated by high-pressure deep dewatering. Furthermore, the main factors affecting the sludge dewaterability were explored by the means of principal component analysis (PCA), and it was concluded that first principal component (PC1), containing most composition of extracellular polymeric substances (EPS), accounted for 53.1% of the X variation and 62.9% of information Y variation. Both protein in soluble EPS (PNS) and polysaccharide in a tightly bound EPS (PST), with the variable importance in the projection (VIP) values more than 1, were regarded as the most decisive factors to the deep dewatering performance of municipal sludge. Additionally, the validation results demonstrate the accuracy and practicability of the obtained model, specifically fit for a conditioning system for cationic polyacrylamide (CPAM) and lysozyme either separately or jointly.
Optimization of agricultural planting structure under multi-objective regulation of water resources
Authors: Yang L , Xie J C , Wang N , Zhu J W , Li H E , Ma B 
Published: November 2019

Abstract
Focusing on the problems such as adjustment of planting structure, imbalance of water supply and serious over-extraction of groundwater in Jinghui Canal Irrigation District, a multi-objective water regulation model was established for finding coordinate development among ecological benefits, social benefits and economic benefits to seek the reasonable program of water resource utilization and agricultural planting. When the ecological benefit was optimal, the total area of crop planting was 6.105 × 104 hm2, the area of grain crops, fruit trees and vegetables planting was 3.073 × 104 hm2, 1.444 × 104 hm2 and 1.592 × 104 hm2 respectively. Under this scenario, the irrigation water requirement was 35986.87 × 104 m3/a. The surface water supply was 32268.42 × 104 m3/a and the compensation of groundwater supply was 3718.45 × 104 m3/a. Therefore, when the social benefit was optimal, the total area of crop planting was 6.57 × 104 hm2, the area of grain crops, fruit trees and vegetables planting was 3.684 × 104 hm2, 1.214 × 104 hm2 and 1.673 × 104 hm2 respectively. Under this scenario, the irrigation water requirement was 39571.20 × 104 m3/a. The surface water supply was 33438.65 × 104 m3/a and the compensation of groundwater supply was 6132.54 × 104 m3/a. The agricultural planting structure between the two can serve as a reasonable control interval, and provide a reasonable resource utilization and agricultural planting scheme for the future development of Jinghui Canal Irrigation District.
Research on the attribution identification of source runoff variation in the Yellow River Source Region based on water and energy balance model
Authors: Wang Y Q , Yuan Z , Xu J J , Yan B , Hong X F 
Published: November 2019

Abstract
The Yellow River source region runoff has a huge impact on the Yellow River Basin. Based on the data of meteorological and hydrological elements from 1960 to 2015 and the principle of water and energy coupling equilibrium in the basin, this paper analysis the influence of climate and underlying surface changes on runoff, and derives its differential. Firstly, the variation law of runoff in the Yellow River source is analysed based on the long series of runoff data. Then the influence of climate change and the underlying surface changes on runoff is studied by the principle of watershed and energy coupling equilibrium. And the influence of changes in meteorological elements is further refined into runoff changes caused by precipitation changes and potential evapotranspiration combined with the coefficient of climate elasticity. Finally, analysis results show that a 1% increase in elasticity factor precipitation, potential evaporation, and the perennial average basin surface parameters, will result in an increase in 1.97% runoff, a decrease in runoff of 0.97% or 1.18%. The contribution of runoff reduction was 24.0% for precipitation change and 18.0% for evaporation. And for the Yellow River source region, the contribution of climate change scenarios and human activity factors to runoff changes is close to 4:6. Compared with other stations, we can find that the closer to the source of the river, the greater affected by climate change, and the closer to the middle reaches, the greater the impact of human activities.
Visible/near infrared spectroscopy method applied research in wetland soil nutrients rapid test
Authors: Ren G X , Wei Z Q , Fan P P , Wang X Y 
Published: November 2019

Abstract
Visible/near infrared spectrum method has the advantages of fast and green, there is much better technical superiority in soil nutrients on-site detection. Studying on wetland soil samples from 4 districts of Qingdao with higher heterogeneity, according to its total nitrogen (TN), available nitrogen (AN), total phosphorus (TP), available phosphorus (AP), total potassium (TK), slowly available potassium (SK) and available potassium (FK) content and visible/near infrared reflectance spectroscopy, adopted SPA and PLSR to choose characteristic wavelength and build mode. Modeling results and experimental data indicated that this method to the content of TN, AN, TP, AP and FK in wetland, can be predicted accurately, it also can be predicted the content of TK and SK roughly.
Countermeasures for sludge treatment and disposal of Nanning municipal sewage treatment plant
Authors: Bei D G , Xu Q , Luo Y , Jiang L 
Published: November 2019

Abstract
This paper introduces the actual treatment and disposal of sludge from urban sewage treatment plant in Nanning, analyzes the problems and causes in the process of sludge treatment and disposal, proposes corresponding solutions, and useful thinking and suggestions.
Determination of trace heavy metals in seawater with 8-hydroxyquinoline solid phase extraction by ICP-OES
Authors: Wang G L , Zhou Y G , Bian J , Huang J J , Du G Y , Zhang S J 
Published: November 2019

AbstractThe determination of trace heavy metals in seawater with 8-hydroxyquinoline solid phase extraction by ICP-OES was studied. In ammonium acetate buffer with pH 5.0, 8-hydroxyquinoline chelated with trace heavy metal ions 15 min. The chelate compound can be enriched by C18 solid phase extraction column. The chelate can be eluted quantitatively by methanol, and then determined by ICP-OES method after digestion. The method can be used for quantitative analysis of trace heavy metal ions in high salinity. The data are reliable, which meets the marine monitoring standards.
Alterational correlation analysis between the water level and the influencing factors of Hukou Station at Poyang Lake
Authors: Xu B , Xu J J , Yao L Q , Yuan Z , Lin Y R , Song L 
Published: November 2019

Abstract
Poyang Lake plays a restricts and interacts role with Yangtze River, the key node of water resources connection between them is Hukou Station. The water level of Hukou Station reflects the inflow, precipitation, evaporation of Poyang Lake Basin and the backflow of the main stream of Yangtze River. Influenced by the climate change and human activities, the water level of Hukou Station appears of the inconsistency characeteristics obviously, which induced abnormally low water level, ecological degradation of beach wetlands, and dramatic reduction of water storage capacity in Poyang Lake. In order to analyze the alterational correlation be between the water level and the influencing factors of hukou station, and finding out the highest correlation factor, the Hydrological Alteration Diagnosis System was used to diagnose the alteration of water level of Hukou Station and the influencing factors. The results show that, the water level of Hukou station experienced a moderate alteration in a leap-down manner in 2003, and the mean value of the water level decreased 0.8m after the hydrological alteration; the influencing factors experienced different hydrological alteration with different form, tha main alteration form is jump alteration, and there is no trend alteration happened in all the series; the alterational correlation between the water level of Hukou Station and Jiujiang Station is the highest, which means the mainstream flow of Yangtze River plays the most important role at the hydrological alteration of the water level of Hukou Station. The alterational correlation has a certain indicative role in analyzing the inconsistency evolution characteristics of Poyang Lake.
Optimization model for enhancing water-use efficiency from the perspective of water-energy-food nexus
Authors: Zhang T Y , Dong L Y , Feng X M , Tan Q 
Published: November 2019

Abstract
The water-energy-food (WEF) nexus, which is essential for supporting regional sustainable development, has become a popular research topic. This study proposed an optimization programming framework for improving water-use efficiency from a WEF nexus perspective. Through the incorporation of water rights transfer mechanism, water resources can be flexibly allocated between food and energy sectors. The proposed model could help decision makers to identify the optimal production scales of food and energy production, the potential of water conservation of food production, as well as the investment portfolio of water-saving engineering. The capability of proposed model was illustrated through a case study in Yellow River Basin, north China. Based on the proposed optimization model, the optimal allocation scheme of water resources between food and energy sectors were obtained. A total of 2.34 × 107 m3 of water would be transferred from food production to energy sector. Compared with state quo, production scales of energy sector, as well as profits of both food and energy sectors would increase rapidly. Optimization results reveal that designed energy production scales proposed by local government and enterprises are attainable as long as there are sufficient water resources available for energy sector.
A review on the calculation of non-point source pollution loads
Authors: Li H Z , Zhang M X 
Published: November 2019

Abstract
The non-point source pollution account for a large amount of the total pollution into water after most of the point source pollution is controlled. Therefore, an accurate calculation of non-point source pollution is regarded as the first step for water ecological restoration. This paper reviews traditional and current trends in watershed modelling on the calculation of non-point source pollution loads, including export coefficient models, empirically based models and physically based models. The utilisation of artificial intelligence (AI) as part of a data-driven approach assists the empirically based models to yield better watershed modelling. The processes of modelling, required data and suited situation are introduced which may be helpful to policymakers in the business of pollution reduction and management.
Study on development mode and regulation of water-land-ecology-economy in Sanjiang Plain, China
Authors: Guo L Z , Liu F Q , Wu Z Z 
Published: November 2019

Abstract
Sanjiang Plain is an important grain yield base and ecological demonstration zone of China. Its ecological security, food production, and GDP development can support the sustainable development of SJP. China government focuses on the supply and utilization of resources and grain yield, local government pays attention to the gross domestic product of all sorts of industry, local residents concern the area of paddy and dry lands. This paper takes GDP, grain yield, and ecological service value as our targets under Normal water year and dry year. 8 kinds of land use (dry land, rice (irrigation), rice (rainfed), forest, grassland, wetland, water area, residents), 3 types of industrial development (primary industry, secondary industry, tertiary industry), 3 sorts of water sources (surface water, groundwater, transit water) and 7 ways of water utilization (urban domestic water, rural domestic water, primary industry water, secondary industry water demand, tertiary industry water demand, urban ecological water demand, wetland Ecological water demand) are considered. A comprehensive configuration model of the Sanjiang Plain in the near future (2020) and mid-term future (2025) is presented, which is solved by an optimize software of lingo. The results derived show that the GDP will increase by 50%, the grain output will double, and there is also a slight increase of the ecological service value at 2025.
Investigation on heavy metals pollution of municipal refuse leachate from Tromsø landfill, Northern Norway
Authors: Fu S , Lu J M , Yuan F Q 
Published: November 2019

Abstract
To investigate the heavy metal pollution in leachate from sanitary landfill site of municipal solid waste, a survey was conducted in Tromsø, Northern Norway. Results shows that contents of heavy metals in landfill leachate follow the order Mn>Zn>Ni>Cu>Cr>As>Pb>Cd>Hg, and the order of the risk of different heavy metals is: Mn>Ni>As>Zn>Cr>Pb>Cd>Hg>Cu. The concentrations of Mn and Ni in landfill leachate exceeded the standard. Mn had the highest single standard index. it took the highest risk to surround water and environment. According to comprehensive evaluation of water quality, the landfill leachate is moderately polluted. It is helpful for the control and management of leachate in garbage plants to know the degree and types of heavy metal pollution in leachate.
Converting traditional landscape into resilient landscape in Zhenjiang City to manage stormwater runoff: A case study
Authors: Zhong X L , Zhang L J , Chen H , Bao Z D , Yang Q Q , She N 
Published: November 2019

Abstract
Since the beginning of low impact development (LID) introduced into China, the aesthetic perspective has been a big issue in LID practices. Many landscape architects viewed LIDs as a contradiction to the traditional landscape design. Therefore, a significant challenge in Sponge City construction in China is to communicate with landscape architects understanding the importance of managing stormwater runoff and pollutant removal close to the source. In this paper, we presented a framework developed for civil engineers and landscape architects working together to guide the LID or green infrastructure design. We presented a case study in China using this guideline to build a resilient landscape with aesthetics. It illustrated that the beautiful landscape could be integrated into local LID and regional green stormwater infrastructures for flood mitigation and high pollution load removal.
Selection and application of spatial variability distribution function of soil moisture in farmland
Authors: Yao L , Wang Y R , Wang L , Gao W , Zhang Z 
Published: November 2019

Abstract
In order to find a method for reasonably determining the number of soil moisture monitoring points (depth 0-20, 20-40, 40-60 cm at per points) in the farmland scale, in Beijinzhuang village and Xilv village of Cui Huangkou town, Wuqing district, Tianjin city. The monitoring area (286.67ha). Monitoring stations is divided into three layers from southeast to northwest. The soil moisture content of 61 points was measured in turn. The parameters were fit analysis based on the obtained data by using P-III type distribution function and normal distribution function. The minimum sample size of the measured sequence was analyzed. The analysis results show that the P-III type distribution function (correlation coefficient R2=0.9954, average relative error is 6.3%) is better than the normal distribution function (correlation coefficient R2=0.9918, average relative error is 6.6%), but the two are very close. Therefore, the number of reasonable soil moisture monitoring points were determined by the normal distribution function . the number of samples of the measured sequence, by which determining the reasonable soil moisture monitoring points in the farmland scale, should not be less than 30 points.
Cumulative effect of the perennial reclamation projects on water exchange in Sanmen Bay
Authors: Huang P Y , Hu H , Zhang M M 
Published: November 2019

Abstract
Sanmen Bay is located in the middle of Zhejiang coastal area. It is a semi-enclosed bay with many silty tongue-like shoals. There are also harbors with good water depth. This form of shoals and branches constitutes a unique muddy coastal landform on the Zhejiang-Fujian coast. Large areas of tidal flats provide conditions for reclamation. Since the beginning of the new millennium, the speed of reclamation in Sanmen Bay has accelerated, and its cumulative impact on the environment has gradually increased. Based on the high-resolution water depth and coastline data of 2003 and 2013, this paper establishes a numerical model based on Delft3D to study the cumulative response of hydrodynamics, tidal prism, and water exchange capacity to the reclamation project in a decade. The calculation results show that within ten years, the reclamation of the sea has reduced the area of the shoal in Sanmen Bay. The trend of the ebb current in the bay has been weakened, and the tidal prism has been reduced by nearly 7%. Also, the reclamation projects have weakened the overall water exchange capacity of Sanmen Bay with the outside world. Due to the topographical features of Sanmen Bay, the degree of influence varies from region to region.
Study on evaluation index system for ecological effect of water conservancy projects
Authors: Wei N , Lu K M , Xie J C , Lin M K 
Published: November 2019

Abstract
With the transformation from traditional water conservancy to ecological water conservancy, functions of water conservancy projects have been changed. In addition to meeting the demand of social economy development, the protection and improvement of eco-environment should be taken into account. As the link between water use for human activities and natural water cycle, it is necessary to research on the ecological effect of water conservancy projects. From the perspective of whether to be affected by human activities, ecological effect is divided into natural ecological effect and social ecological effect, a framework of comprehensive evaluation index system for ecological effect is preliminarily constructed. The concept of ecological effect of water conservancy projects is analysed, and three-level ecological effects of water conservancy projects are presented. The three-level evaluation index system for ecological effect of water conservancy projects is built based on the hydrological regime analysis. The quantitative evaluation can be achieved. The method is applied to evaluate the ecological effect of large-scale water conservancy projects in the Weihe River Basin. The results show that the index system is of high applicability, which provides scientific basis for the quantitative evaluation for ecological effect of water conservancy projects and offers a better support to healthy development of river ecosystems.