bluuebunny/crossref_metadata_2025_split huggingface dataset:
Biosorption of Cd2+ using an admixture of Ulva lactuca and fly ash from coal-fired power plant
Authors: Nieva A D , Buenafe R J Q , Amante R E , Martinez C M 
Published: November 2019

Abstract
This study investigated the adsorption of Cd2+ in a simulated wastewater using green macro alga, U. lactuca and fly ash from coal-fired power plant, individually and as an admixture (25:75, 50:50, and 75:25). The maximum adsorption capacities for 0:100, 25:75, 50:50, 75:25 and 100:0 ratios of U. lactuca and fly ash were 6.47, 6.28, 6.27, 6.19, and 6.39 mg/g adsorbent, respectively. The optimum adsorption was found to occur at an initial Cd2+ concentration of 70 mg/L at 293 K, pH 5, 120-minute contact time, 300 rpm agitation speed, and 10 g/L biosorbent dosage. The obtained results fitted well with Langmuir Isotherm, suggesting a monolayer adsorption with adsorption capacity of 6.852 mg/g adsorbent. The highest adsorption capacity was observed using fly ash while the lowest was observed using 75:25 U. lactuca to fly ash ratio.
Study of the zooplankton community as an indicator of the trophic status of reservoirs of the Chelyabinsk Region, Russia
Authors: Mashkova I V , Kostriykova A M , Trofimenko V V , Slavnaya A I 
Published: November 2019

Abstract
To date very little research has been carried out on zooplankton ecology in artificial reservoirs in Chelyabinsk region. The paper considers the current state of the zooplankton community in six reservoirs of the Chelyabinsk region (Russia). The species composition (32 species) and quantitative characteristics of the zooplankton community of reservoirs in summers of 2016 and 2017 were studied. The species common to all reservoirs belong to widespread palearct or cosmopolitan. It is studied the ratio of major groups. The results of the study showed that the share of Cladocera in mesotrophic reservoirs is 2.5 times higher than in eutrophic reservoirs. Unlike Cladocera, the Rotifera group is 10 times more abundant in eutrophic reservoirs compared to mesotrophic ones. Copepoda were common to all bodies of water, as they belong to widespread Palearctic or cosmopolitan. Changes in species diversity were recorded depending on the eutrophication of the reservoir. The increased anthropogenic load influenced the decrease in both the composition and the structure of zooplankton communities in water bodies.
Evaluation of the water quality at Bogdalen watershed near Kvitfjell and Raudfjell wind farm area
Authors: Lu J , Bui M T , Yuan F 
Published: November 2019

Abstract
Wind energy is one of the important renewable energies that get fast development in recent years. The development of wind turbines can have potential environmental impact on the surrounding environment. Especially when the wind turbines are built near the watersheds, water quality in the watershed may be degraded. In this study, the water quality in Bogdalen watershed that in or surrounding Kvitfjell and Raudfjell wind farm, the biggest wind farm in the North of Norway was studied. The water was collected at 3 wind turbine points and one accumulation point in the watershed far from the wind turbine. The collected water samples were tested pH, the concentrations of Al, As, Cd, Cr, Cu, Fe, Ni, Pb, Zn and bacteria account of Intestinal enterococci, E.coli, clostridium perfringens and coliform. The results showed that the water in the watershed accumulation point has high bacteria account of Intestinal enterococci, E.coli, clostridum perfringens and coliform. The water has different degree of faecal pollution. The pollution is especially significant in the summer season. The water in the wind turbine point has high concentration of Al and Mn. However, the Al can easily remove by filtering the water through a filter paper. The Mn concentration didn’t reduce much after the filtration. The concentration of Mn in the water is still higher than the limit values set by Ireland EPA.
On the variability of a river water flow under seasonal conditions: Case study
Authors: Mocanu-Vargancsik C A , Barbulescu A 
Published: November 2019

Abstract
Precipitation regime and anthropogenic activities are the main factors that influence the river flow along the time. To assure the flow regulation and the flood mitigation some structural measures must be implemented. Building dams represents one of these measures. Their impact on the stream flow and climate change must be studied for avoiding negative effects on the environment. Therefore, our study focuses on the variability of the Buzau River (in Romania) water flow and its seasonal variation. The analysis is done for the period before and after the moment when the Siriu Dam (Romania) was built. The stationarity and the trend existence are analysed and the results are compared by statistical methods.
Impact of concrete on riparian ecosystems
Authors: Purdy K , Wright I A 
Published: November 2019

Abstract
Throughout the world, concrete is used extensively in urban development. Due to its convenience and durability, most paths, carparks, dams, and even drainage systems are constructed from concrete. However, recent studies indicate that concrete significantly affects water chemistry and that concrete infrastructure may have a major effect on the chemistry of nearby streams. This is particularly relevant for sensitive waterways such as those in the Blue Mountains region in Sydney, Australia. This study aimed to investigate the chemical changes associated with concrete exposure by conducting water recirculation experiments. Water collected from a pristine Blue Mountains Upland Swamp (BMUS) was mildly acidic (average pH of 4.65) with a low electrical conductivity (EC of 57.99μS/cm) before concrete exposure. After the water was continuously recirculated through a concrete pipe for 120 minutes, pH and EC increased significantly, to 7.87 and 137.72μS/cm respectively. Significant increases in concentrations of ions such as bicarbonate, calcium and sulphate were also observed. Results verify previous findings that concrete significantly and rapidly affects water chemistry and support the hypothesis that concrete plays a significant role in the chemical differences seen between urban and non-urban waterways. Results also indicate that concrete is a source of metals such as copper, chromium, strontium, titanium, and lithium. Furthermore, this study aimed to investigate whether these metals have the potential to affect ecosystems more broadly. Salix babylonica, a common invasive plant species in the Sydney region, was grown in pristine BMUS water and concrete-recirculated BMUS water. Plants grown in concrete-recirculated water had significantly greater new growth and the tissue of these plants was significantly higher in concentrations of barium, copper, lead, manganese, and strontium. As metals in the water appear to be moving into plant tissue, results suggest that these metals are bioavailable and thus have the potential to move into higher trophic levels and the ecosystem more generally. Further investigation is required to determine how far these metals may permeate the food chain.
Effect of wheat straw as organic matter and different water quality on some chemical soil properties and growth of pepper (Capsicum annuum)
Authors: Mohammed R J , Abdulkadhim K A , Hassan D F , Kadhim T F 
Published: November 2019

Abstract
A field experiment was carried out in the area of Al-Mahtahia in Babil province. The experiment was aimed at studying the effect of using different levels of plant waste (wheat straw) as organic fertilizer and using different water types (river water, drainage water and well water) In the growth and yield of pepper and some chemical soil properties measured. Use Randomized Complete Block Design was used to implement the experiment. The results showed that the values of plant height were 52.33 cm, 25 fruit / plant for fruit number, 24.11 sp. For chlorophyll and 54.24 g / fruit for the weight of thyme, adding organic matter to 20 ton / ha. It was also the highest value for the use of different irrigation water when using the river water and all the characteristics of the plant as its values in plant height 52.76 cm compared to other water types. As for the chemical soil properties, the results showed that the effect of adding the organic matter on the Ph soil, which was 7.3 when adding organic matter to the level of 20 tons / ha compared with the comparison treatment, which amounted to 7.7 g / kg. Soil salinity values were 4.5 ds.m-1 when organic matter was added to the 20 ton / ha level compared with the comparison treatment of 3.4 ds.m-1, and the organic matter values were 2.267 g.kg-1 When adding organic matter to the level 20 ton / ha compared to the comparison treatment of 0.86 g.kg-1. Interaction between straw and water quality was found to have a good effect in reducing the salinity effect of water used by wheat straw.
Determination of gas hold-up of Pasig River using dynamic gassing out method in a bubble column reactor
Authors: Santos R G , Galvez R C , Extremadura K M , Aquino R R , Bernabe D P , Salvacion J L 
Published: November 2019

Abstract
This study determines the gas hold-up of Pasig River in a bubble column reactor using dynamic gassing out method by sparging air at different initial liquid height (13 and 25 inches) and superficial gas velocity (0.15, 0.20 and 0.24 cm/s) under atmospheric condition. Discrete grab water sampling was used for water sample collection. Experimental findings showed that the gas hold-up profiles were linear with respect to superficial gas velocity with R2 of 0.997 and 0.999 for 13 inches and 25 inches of liquid height, respectively. The values of gas hold-up decreased with increased liquid height to compensate for the increased in liquid holdup in the column. Experimental results showed that the desired sparging conditions was at high superficial gas velocity and at low initial liquid height in the reactor. The highest dissolved oxygen concentration resulted to the highest gas hold-up in the bubble column reactor. With the results of the study, the data of gas hold-up can be used for future studies to better understand the mass transfer mechanism of the aerated water sample in Pasig River, which eventually leads to the design and scale up of bubble column reactors and aerators for future rehabilitation projects of Pasig River to increase dissolved oxygen content.
Natural coagulant of laban wood (Vitex pubescens Vahl) for turbidity water treatment
Authors: Fenditasari K , Suparno  , Jannah Z , Usiana W , Susanti D , Indartono S 
Published: November 2019

Abstract
The groundwater physical condition in Sleman Regency, Indonesia is generally cloudy and contains high amount of iron (Fe) so it is not sufficient to use for daily needs drinking water. High levels of Fe are dangerous for humans. This study aims to process and purify ground water and reduce iron content using laban wood (Vitex pubescens Vahl). This media was chosen because it is a local waste furniture industry in Sleman Regency. Indeed, it is conducted as charcoal. Then, the charcoal is chemically activated by soaking with H2SO4 for 24 hours. Furthermore, it is activated physically by heating up to 120°C for 30 minutes. Laban wood (Vitex pubescens Vahl) activated charcoal was characterized using UV-Vis to determine iron (Fe) levels after filtration. In addition, the filtration water is measured using a pH meter to determine the degree of acidity, TDS meter and the efficiency of light transmission to determine the turbidity. To summarize, Laban wood activated charcoal was effectively used as a filtration media. It gives an effect for increasing the light transmission efficiency, decreasing TDS value, and absorption of iron (Fe) levels efficiency. However, it does not affect the pH value. The highest light transmission efficiency value is found in the adsorbent type of laban activated charcoal which is equal to (6.91 ± 0.005)% at a mass of 500 grams. As for the TDS value, the highest decrease in TDS value was TDS value of (140.0 ± 0.5) ppm when it was 500 grams. The highest efficiency of absorption of iron content is found in the composition of laban activated charcoal which is equal to Fe to (87.27 ± 0.2)%. This activated charcoal can be used as a medium to reduce iron content up to (2.27 ± 0.005) mg / L. Therefore, laban active charcoal which is chemically activated with H2SO4 for 24 hours effective to reduce iron (Fe) levels according to the stipulated clean water requirements Indonesian Minister of Health Regulation Number 416 / MENKES / PER / IX / 1990.
Study on the effect of temperature on the leaching of contaminants from Ballangen Tailings Deposit, Norway-A statistical method
Authors: Yuan F , Lu J 
Published: November 2019

Abstract
Temperature is one important factor that affects the leaching of contaminants from tailings deposit. However, randomness issue due to the precision of the instrument, the variation of ambient temperature, the individual skill of the lab technician etc., is inevitable and will affect the results when we evaluate the dependence of two parameters. In this study, a statistical method was developed to analyze the experimental data to reduce randomness. The experiment data from a laboratory batch leaching experiment on the tailings at Ballangen deposit, Northern Norway were used to analyze the dependency of concentrations of Cr, Cu, Ni and Zn in the leachate on temperature. The dependency of concentrations of Cr, Cu, Ni and Zn in the leachate is determined by testing the significance of the slope coefficient of regression analysis. The results show that the concentrations of Cr and Zn do not show dependency on the temperature. However, the temperature shows evident impact on the concentrations of Cu and Ni. High temperature will produce higher Cu and Ni concentration in the leachate.
Impacts of temperature effect removal on rainfall estimation from soil water content by using SM2RAIN algorithm
Authors: Hoang K O , Lu M J 
Published: November 2019

AbstractRainfall data is the most basic and essential input for many studies in hydrology, climatology, or water management. However, rainfall data is quite limited in poorly equipped regions such as high mountain regions, developing countries, and savannahs. In recent years, a new approach named SM2RAIN that has been proposed to assess rainfall amount on a daily scale. This method uses the relative saturation of soil (Se) as the input to infer rainfall. Some of these studies showed promising results in evaluating rainfall by using SM2RAIN. Over past decades, however, some other studies have also found that the soil water content (SWC), which is used to calculate the Se, has errors associated with diurnal temperature fluctuation. As soil water content is the primary input variable of SM2RAIN, this error must have impacts on the performance of SM2RAIN. In this study, the authors have assessed and cleared the impact of temperature on SM2RAIN performance. Thus, an effective temperature correction method has been applied to remove the impact of temperature on soil water content at 19 sites over the United States, Africa (Senegal) and Europe (Romania) in varies climatic conditions to assess the impact of temperature effect removal on results of SM2RAIN algorithm. The criteria to evaluate the program such as Nash-Sutcliff has increased up to 53% depending on the initial results and climatic condition. The correlation coefficient has positive change as well. As a result, this removing makes the performance of the algorithm better.
Microfacies characteristics and depositional evolution of typical wave-dominated littoral deposits – A case of Carboniferous ‘Donghe sandstones’ in Hudson Oilfield, Tarim basin, NW China
Authors: Li W L , Gao S Y , Tian X D , Han C H , Wei G H , Xu H M 
Published: November 2019

Abstract
Hudson Oilfield, which located in the northern Uplift of Tarim Basin, is considered to be the largest whole-shaped oilfield in China, and the extensive Carboniferous ‘Donghe sandstones’, one of the most important marine sandstones units for oil and gas exploration in Tabei Uplift, constitutes the main reservoir. However, not all this sandstones are with good physical properties, and hence, the sedimentary characteristics and depositional evolution is believed to be critical to prediction of reservoir. It is determined that wave-dominated clastic littoral deposits with no barrier are the main depositional environment based on the modern sedimentary theory and related data analysis including ancient landform characteristics. And transitional zone, shoreface, foreshore, backshore and dune are considered as the five subenvironments. Through data of high resolution dipmeter logging and imaging logging, different sedimentary structures and other facies marks observed from cores of research regions are demarcated, and thirteen microfacies are further identified. Based on the detailed microfacies types, the evolution process of Carboniferous ‘Donghe sandstones’ can be divided to four main periods, in which, early highstand systems tract (HST) deposits in Period 1-2, and late HST deposits in Period 3-4.
The coupling relation of man-land system based on temporal evolution analysis in Guangxi Xijiang River Basin
Authors: Yan Y , Huang K Y , Hu F L , Zhang J B , Hu B Q 
Published: November 2019

Abstract
The man-land system is a macro system consisted of nature, society and economy, which is of great significance to the regional management and sustainable development. However, the system presents many challenges and disharmonies especially in river basin regions. It is not only the largest area where human disturbances occur but also the most concentrated area of anthropogenic activities. So, the Xijiang River Basin in Guangxi, which is one of the emerging national strategies, was taken as the study area. And the man-land system of the study area can come down to the resources and environment subsystem and social economy subsystem. First, the evaluation index system was established by selecting 25 relatively evaluation indexes. The variable coefficient was applied to calculate the index weight. Then, the coupling model, which was developed based on system theory, was introduced to figure out the coupling degree and coupling coordination degree of the man-land system of the study area. The results indicated that the development of social economy system presented ascending trend accompanied with resources and environment system presented fluctuated ascending trend. From 2005 to 2014, the coupled states of the man-land system developed from low level harmonize to medium level harmonize.
Effectiveness evaluation of LIDs through SWMM: A case study of typical urban unit in Handan, China
Authors: Huo Y C , Wu X , Luan Q H , Liu J H , Ma D 
Published: November 2019

AbstractLIDs are frequently utilized measures in urban waterlogging management in the world and the evaluation of their effectiveness through model gets a lot of attention in urban hydrological research. In this study, a typical urban unit of Handan, China was selected, and regional SWMM model was calibrated and validated through measured maximum waterlogging depths (MWD) of typical positions; the LIDs effectiveness on runoff process in different return period events were evaluated through the SWMM. The results show that LIDs have an effect on decreasing total runoff quantity and peak discharge and the effectiveness is more significant when the return period is small. The research provides a technical support to the scientific management of local flood and waterlogging and supplies a reference to local Sponge City planning.
Influence of slope on runoff process in typical soil unit, North China
Authors: Sun C W , Luan Q H , Qin T L , Man Z H , Niu Y Z 
Published: November 2019

Abstract
Runoff is a crucial process of water cycle and the related research is also important for hydrology. In this study, an experiment of artificial rainfall runoff was conducted on the Linmingguan Test Base of Hebei University of Engineering, China. The results show that the typical rainfalls runoff process in flood season and non-flood season are different on the same slope units; the initial time of runoff yield, the peak time & discharge and recession hydrograph of surface runoff and interflow are various on different slope units. This research can sustain development of principle analysis of runoff yield and concentration and provide technical support for parameter optimization of hydrological model in unsaturated zone of North China.
Hydrochemical properties and groundwater quality evaluation in Suzhou City, lower Yangtze Delta, China
Authors: Zhu X M , Pan Z R , Zhao D H , Zhang W , Ruan X H 
Published: November 2019

Abstract
Detailed study of the chemical analysis results of 49 groundwater samples collected from the region’s second confined aquifer were carried out in an attempt to identify the samples’ hydrochemical properties and to assess the quality and usability of groundwater in Suzhou city, China. The results revealed that sodium, calcium and bicarbonate were the dominant ions in the groundwater samples. Na-HCO3, mixed Na-Ca-HCO3, Ca-HCO3, and Na-Cl type were the four major hydrochemical facies identified by a Piper Trilinear diagram. It was observed that the concentration of ammonia and nitrite in most of the samples in study area exceeded the permissible limit values prescribed by the national (China) and international (WHO) drinking water guidelines. Anthropogenic activities have been shown to be largely responsible for groundwater contamination. Scatter diagrams and factor analysis suggest that natural weathering processes, along with anthropogenic activities, control the hydrogeochemistry of groundwater. On the basis of the analytical results of the 49 groundwater samples as compared to water quality standards, it was found that majority of groundwater samples were not suitable for drinking or for industrial uses directly. Toxic metals and high levels of ions must be removed to render the groundwater suitable for drinking and industrial purposes. However, salinity, sodium adsorption ratio (SAR), residual sodium carbonate (RSC) and sodium percentage (Na%) values indicate that most of groundwater samples were suitable for irrigation purposes.
Numerical simulation of effects of inlet water depth of ecological fishway on the suitability of passing fish
Authors: Ma B , Dong F , Peng W Q , Liu X B , Huang A P , Chen X K , Hou L , Wang W J , Si Y , Yao J W 
Published: November 2019

Abstract
Ecological fishways can not only restore the free passages of migratory organisms, but also play the role of ecological corridor. Currently, the behavior and ecology of the target fish were not fully taken into account in the design of fishways. So this paper takes the swimming ability of Hueho taimen, Brachymystax lenok and Thymallus arcticus in Buhe River as indicators, presents a systematic numerical investigation on effects of different inlet water depth in ecological fishway using a three-dimensional hydrodynamic model (EFDC). The numerical results indicate that the inlet water depth is a key factor in the ability to pass fish. It is shown that the two schemes with different slopes and roughness have significant differences in the flow field distribution under the same inlet water depth; the differences are the location where the maximum velocity occurs and the range beyond the upper limit of the velocity. In addition, when the inlet water depth increases to 0.8m, the flow field distribution of both designs are more suitable for fish passage. The outcomes of this study will be helpful to improve the design of the entrance of Buhe River fishway and make the target species more suitable for passing through.