bluuebunny/crossref_metadata_2025_split huggingface dataset:
ANN Modeling and experimental study of the effect of various factors on solar desalination
Authors: Bagheri Ali , Esfandiari Nadia , Honarvar Bizhan , Azdarpour Amin 
Published: November 2020

Abstract
This study investigated a novel method for increasing desalinated water mass in solar desalination plants. For this purpose, solar panels and a cylindrical parabolic collector (CPC) were used to raise basin water temperature. The effect of different components of basin solar still on freshwater mass was also investigated. The aluminum basin has been associated with maximum water desalination among the different materials constituting a basin. The effects of different colors (e.g. black, brown, and red) on the basin, as well as different water depths (5, 10, and 15 mm), were also explored. The highest amount of freshwater in the black aluminum basin at a 5-mm water depth was 2.97 kg/day. ANN modeling was employed to validate the experimental data, indicating good compliance of experimental data with ANN prediction. According to the results of the simulation with varying numbers of neurons (n = 2–25), the highest and lowest agreement between experimental data and ANN prediction data were related to 24 and 10 neurons, respectively. Under optimum conditions, R2 and %AAD error were 0.993 and 2.654, respectively.
The effect of different drinking water in culture medium on feces microbiota diversity
Authors: Zhou Kun , Liu Weili , Chen Zhaoli , Yang Dong , Qiu Zhigang , Feng Hua , Li Chao , Jin Min , Li Junwen , Xu Qunying , Shen Zhiqiang 
Published: November 2020

Abstract
The human gut harbors trillions of microbes, which are extremely important to the health of the host. However, the effect of drinking water on gut microbiota has been poorly understood. In this study, we explored the response of BALB/c mice gut bacterial community (feces) to the different types of drinking water, including commercial bottled mineral water (MW), natural water (NW), purified water (PW) and tap water (TW). Feces were cultured with brain heart infusion broth dissolved in four types of drinking water. 16S rRNA gene analysis was performed. Our results reveal that the microbiota composition is different among culturing with four types of drinking water. As the culture time increases, the number of OTUs significantly decreased, except under the aerobic condition of MW. Under aerobic conditions on the 5th day, the considerable differences of alpha diversity index are found between MW and three others, and these are the most unique taxa in the MW group. Importantly, the LEfSe analysis discovers that the Bacteroidetes taxa dominate the differences between MW and the other water types. Our findings demonstrate that the mineral water as a culture medium may lead to a progressive increase of the gut microbiota diversity by providing the growth convenience to Bacteroidetes.
Three-dimensional numerical simulation of stepped dropshaft with different step shapes
Authors: Sun Jingkang , Qian Shangtuo , Xu Hui , Wang Xiaosheng , Feng Jiangang 
Published: November 2020

Abstract
The deep tunnel system is increasingly used worldwide for stormwater conveyance and storage, providing a robust and effective means of preventing urban waterlogging. In the system, the dropshaft, with the function of conveying stormwater to the deep tunnels underground, often runs under conditions of high falling head and large discharge. Based on the standard stepped dropshaft, a blade-shaped stepped dropshaft was proposed in order to control the potential standing wave and improve discharge capacity. Its hydraulic characteristics in respect of flow pattern, flow rate distribution, time-averaged pressure and energy dissipation were investigated by numerical simulation. Compared with the standard stepped dropshaft, the blade-shaped stepped dropshaft generated a more uniform flow rate distribution in the radial direction, therefore effectively decreasing the height of the standing wave near the external wall. The negative pressure areas that easily existed on the vertical wall of steps were well controlled. The energy dissipation of the blade-shaped stepped dropshaft was as high as that of the standard stepped dropshaft. Therefore, the blade-shaped stepped dropshaft could be a preferable design for the deep tunnel system.
Block ramps for stream power attenuation in gravel-bed streams: a review
Authors: Chaudhary Rakesh Kumar , Sharma Nayan , Ahmad Zulfequar 
Published: November 2020

Abstract
Application of the block ramp technique in steep gradient streams for energy dissipation as well as to maintain river stability finds increasing favor amongst researchers and practitioners in river engineering. This paper dwells on a comprehensive state-of-the-art review of flow resistance, energy dissipation, flow characteristics, stability, and drag force on block ramps by various investigators in the past. The forms and equations for each type are thoroughly discussed with the objective of finding the grey areas and gaps. More research is warranted further to improve the equations, which are essential for design analysis. Block ramps can be a promising simple technique to achieve reasonable attenuation of devastating fluvial forces unleashed in gravel-bed streams during cloud bursts.
Pressure oscillation of an air pocket beneath a water column in a vertical riser
Authors: Qian Yu , Zhu David Z. 
Published: November 2020

Abstract
Storm geysers have received significant attention lately due to its more frequent occurrences and the induced severe local flooding and infrastructure damages. Previous studies suggested that the air pocket pressure oscillated during geyser events especially in rapid filling process, but only the peak values were studied and the oscillation period was not discussed in detail. In this paper, a theoretical model was developed focusing on the period of the pressure oscillation induced by the expansion/compression of the air pocket below a water column in a vertical riser with film flow. It was found that the oscillation period was a function of the initial air pocket volume, initial air pocket pressure head, the riser diameter, and the initial water column length. The oscillation period increased with the air pocket pressure head and the air pocket volume, but decreased with the riser diameter and the polytropic coefficient. The oscillation period increased then decreased with an increasing water column length. Further, when considering the film flow along the riser, the oscillation period decreased slightly from the analytical solution. It was also found that the inflow rate change did not significantly influence the oscillation period.
Phosphate removal from water using bottom ash: adsorption performance, coexisting anions and modelling studies
Authors: Hashim Khalid S. , Ewadh Hind Mufeed , Muhsin Adnan A. , Zubaidi Salah L. , Kot Patryk , Muradov Magomed , Aljefery Mohammed , Al-Khaddar Rafid 
Published: November 2020

Abstract
Phosphate in freshwater possesses significant effects on both quality of water and human health. Hence, many treatment methods have been used to remove phosphate from water/wastewaters, such as biological and electrochemical methods. Recent researches demonstrated that adsorption approaches are convenient solutions for water/wastewater remediation from phosphate. Thus, the present study employs industrial by-products (bottom ash (BA)), as a cost-effective and eco-friendly alternative, to remediate water from phosphate in the presence of competitor ions (humic acid). This study was initiated by characterising the chemical and physical properties of the BA, sample, then Central Composite Design (CCD) was utilised to design the required batch experiments and to model the influence of solution temperature (ST), humic acid concentration (HAC), pH of the solution (PoS) and doses of adsorbent (DoA) on the performance of the BA. The Langmuir model was utilised to assess the adsorption process. The outcomes of this study evidenced that the BA removed 83.8% of 5.0 mg/l of phosphates at ST, HAC, PoS and DoA 35 °C, 20 mg/L, 5 and 55 g/L, respectively. The isotherm study indicated a good affinity between BA and phosphate. Additionally, the developed model, using the CCD, reliably simulated the removal of phosphates using BA (R2 = 0.99).
Fabrication of durable superhydrophobic/oleophilic cotton fabric for highly efficient oil/water separation
Authors: Mohamed M. E. , Abd-El-Nabey B. A. 
Published: November 2020

Abstract
In the present work, dopamine is self-polymerized on cotton fabric by a simple deep-coating method and followed by modification with an ethanolic solution of palmitic acid: a superhydrophobic/oleophilic cotton fabric was obtained. The as-prepared cotton fabric exhibits a superhydrophobic character with a water contact angle of 157o. The absorption capacity of as-prepared superhydrophobic/oleophilic cotton fabric in n-hexane, petroleum ether, and silicone oil was determined. The results show that silicone oil has the highest absorption capacity while n-hexane has the lowest value. The absorption capacity is nearly constant even after ten cycles, indicating the efficient recyclability of the as-prepared superhydrophobic/oleophilic cotton fabric for oil separation. The as-prepared superhydrophobic/oleophilic cotton fabric shows excellent separation efficiency, high flux rate, and excellent chemical and mechanical stability.
Comparative characterization of cyanide-containing steel industrial wastewater
Authors: Mondal Amit , Sarkar Supriya , Nair Udayabhanu G. 
Published: November 2020

Abstract
In the steel industry, cyanide in the wastewater is a major environmental concern. There are several chemical, physical, and biological treatment processes available for the removal of cyanide from industrial wastewater. But the efficacy of every treatment process depends on the complex elemental matrix of wastewater and the interference associated with them. Thus, water characterization plays a vital part in finding a suitable cyanide treatment process for any wastewater. Characterization data can give a clear overview of the complexity of cyanide in the wastewater, which ultimately helps in selecting the right remediation process. The present work includes comparative characterization of coke plant and blast furnace wastewater collected from an integrated steel plant. Three months of data for physico-chemical properties of the two different sources were analysed and compared. Pearson's correlation analysis of physico-chemical properties with free cyanide was also studied. The different forms of cyanide in coke plant and blast furnace water were also characterised, along with interference associated with them. It was observed that the water matrix of coke plant and blast furnace effluents are totally different. It was also evident that free cyanide concentration is much more affected in coke plant wastewater than in blast furnace water.
Applied organic-inorganic nanocomposite of PLA-TiO2 for preparing polysulfone membrane: structure, performance and UV-assisted cleaning strategy
Authors: Zhou Siru , Zhang Yang , Ni Lei , Pei Yuxiang , Zhang Haoquan , Zhang Hongwei 
Published: November 2020

Abstract
Blended organic copolymer (or homopolymer) and inorganic nanoparticles have been widely used (separately or simultaneously) for optimizing membrane pore structure and surface functionality. However, the prepared membranes suffer from degraded stability and insufficient integrity due to the high solubility or incompatibility of the blending additives. In this work, an organic-inorganic nanocomposite (i.e., PLA-TiO2) was designed, and employed for PSF membrane preparation. The Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis confirmed that bidentate chelating dominated the bonding mechanism between PLA and TiO2. The resultant PSF/PLA-TiO2 membranes possessed a highly porous surface with narrowed pore size distribution, demonstrating the strong pore forming ability of PLA-TiO2 for membrane preparations. Moreover, owing to the distinct inorganic-organic molecular conformation, the PLA-TiO2 exhibited enhanced stability and dispersibility within the PSF substance, which endowed the membrane with long-acting hydrophilicity and UV responsiveness. Given the UV responsiveness that is introduced by PLA-TiO2, UV-assisted strategies (UV-F and UV-C) were designed to further mitigate membrane fouling. The fouling analysis indicated that both reversible fouling and irreversible fouling were reduced in the UV-C process, signifying the synergistic effect between photocatalysis and hydraulics in membrane fouling mitigation. The enhanced membrane performance and the efficient preparation process highlight the potential of PLA-TiO2 in membrane modifications.
Study of the adsorption of an organic pollutant onto a microporous metal organic framework
Authors: Mohammed Mansouri Taki Eddine , Djamel Nibou , Mohamed Trari , Amokrane Samira 
Published: November 2020

Abstract
In this study, the microporous metal organic framework-5 (MOF-5) has been synthesized to be used to remove methyl orange by adsorption. The adsorption experiments exhibit a good adsorption capacity at a catalyst dose of 0.1 g L−1 and for an initial concentration of 200 mg L−1, whereas the performance is stable over a wide pH range. The equilibrium adsorption data showed a sigmoidal course, which is well fitted by the Dubinin-Astakhov model applicable for physical adsorption processes (E = 0.055 kJ mol−1) onto heterogeneous surfaces and a more homogeneous pore structure (n = 9.9), with a maximum adsorption capacity of 1248.35 mg g−1. As can be observed from the evaluation of the kinetic data, the surface of the adsorbent is heterogeneous with different active sites for methyl orange (MO) adsorption. Moreover, based on the rate constant, it can be suggested that there is a specific interaction like electrostatic interaction between MO and the adsorbent for rapid and high uptake of the dye, whereas the adsorption phenomenon is reversible. According to the adsorption mechanisms, intra-particle and film diffusion models simultaneously controlled the rate sorption, which was confirmed by the calculated intra-particle diffusion and the film diffusion coefficients. The evaluation of the thermodynamic parameters revealed that the MO adsorption is spontaneous, endothermic and the randomness increases with the adsorption of MO.
Synthesis of layered double hydroxides with nitrate and its adsorption properties of phosphate
Authors: Zhang Jiangpo , Xia Qi , Hong Xiaofeng , Chen Jianjun , Liu Daijun 
Published: November 2020

Abstract
In the present study, different ratios of layered double hydroxides (LDHs) were synthesized via co-precipitation method. The synthesized LDHs were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), nitrogen adsorption-desorption analysis, point of zero charges (pHpzc), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Phosphate adsorption performances were estimated by batch adsorption experiments; desorption hysteresis and adsorption mechanism were also investigated. The XRD, SEM and TEM results confirmed the multilayer structure of the synthesized LDHs. The pseudo-second-order kinetic model and the Freundlich model describe the adsorption behavior of LDHs best. The maximum adsorption capacity is 185.86 mg-KH2PO4/g for Mg2Al-NO3 LDH. When the dosage of LDHs was greater than 2 g/L, the phosphorus content in the solution decreased from 30 mg-P/L to 0.077 mg-P/L after adsorption by Mg2Al-NO3 LDH. All the results reveal that Mg2Al-NO3 LDH is a potential adsorbent for removing phosphate from aqueous solution.
Effect of dextrin on flotation separation and surface properties of chalcopyrite and arsenopyrite
Authors: Dong Jingshen , Liu Quanjun , Subhonqulov S. H. 
Published: November 2020

Abstract
The flotation separation and mechanism of dextrin on chalcopyrite and arsenopyrite surface were investigated using micro-flotation tests, zeta potential measurements, infrared spectroscopy, contact angle measurement and surface adsorption experiments. The micro-flotation test showed that dextrin had obvious inhibitory effect on arsenopyrite flotation, but had no inhibitory effect on chalcopyrite flotation. After treating the surface of arsenopyrite with dextrin, the infrared spectra showed that new characteristic peaks, indicating that chemical adsorption and significant interaction between dextrin and arsenopyrite particles. Zeta potential measurements, contact angle measurement and surface adsorption experiments showed that the selective adsorption of dextrin added a large number of hydrophilic groups to the surface of arsenopyrite, but had little effect on chalcopyrite. In addition, the macromolecular chain structure of dextrin may hinder the attachment of collector molecules to arsenopyrite. The combined effect of these two aspects makes the arsenopyrite treated with dextrin lose its hydrophobicity and enables the separation of chalcopyrite and arsenopyrite.
In-vitro Evaluation of Actinobacteria for its Potential in Bio-control of Fungal Plant Pathogens
Authors:   Department of Biotechnology, Pachhunga University College, College Veng, Aizawl, Mizoram–796005, puia Zothan , Carrie W. , Leo V.V. , Passari A.K. ,   Department of Biotechnology, Mizoram University, Tanhril, Mizoram–796004, Lalmuanpuii R. Lalmuanpuii ,   Department of Botany, Mizoram University, Tanhril, Mizoram–796004, Singh B.P. ,   Department of Biotechnology, Mizoram University, Tanhril, Mizoram–796004
Published: November 2020

Infections caused by fungal plant pathogens are recently recognized as a threat to food security worldwide and its control strategies need to be taken care where naturally synthesized fungicides such as those obtained from actinobacteria are becoming an area of great interest. A total of 68 isolates of actinobacteria were evaluated for their antagonistic potential against four fungal plant pathogens viz., Fusarium oxysporum CABI-293942, Fusarium udum MTCC-2755, Fusarium proliferatum MTCC-286 and Fusarium graminearum MTCC-1893 by dual culture	assay. It was found that 83.8% of the isolates showed inhibitory activity against at least one of the tested plant pathogens with the percentage of inhibition ranging from 20–87.2. Thirteen Streptomyces isolates and one Nocardiposis isolate exhibited inhibition activity against all the tested pathogens. Overall, this study gives a basic understanding of the potential aspect of freshwater sediments derived actinobacteria against fungal phytopathogens.
Currículos escolares: saberes docentes na produção de materiais didáticos por professores da educação básica
Authors: Sousa de Moraes Bianca Gonçalves , De Moura da Rocha Natalia Collares , Gomes Maria Margarida 
Published: December 2020

O presente artigo tem como principal objetivo compreender possíveis articulações entre os processos de produção de materiais didáticos elaborados e/ou utilizados por professores (as) da educação básica e seus saberes docentes. As análises empreendidas reforçam a ideia de que os saberes docentes são múltiplos e personalizados, refletindo a trajetória de vida, acadêmica e profissional, e permitindo a construção do ser docente de cada um. É notório o quanto esses saberes interferem no currículo escolar, já que levam a valorização de diferentes e novas abordagens curriculares que são concretizadas nos materiais didáticos.Palavras-chave: Currículos escolares; materiais didáticos; saberes docentes. This article aims to understand possible links between the developed educational materials and/or its use by basic education teachers and their teaching knowledge. The analysis undertaken reinforce the idea that teaching knowledge are multiple and customized, reflecting the trajectory of life, academic and professional, and allowing the construction of being a teacher. It is clear how this knowledge interfere in the school curriculum, as lead to appreciation of different and new curricular approaches which can be observed in teaching materials.Key-words: School Curriculum; Teaching Materials; Teaching Knowledge.
Aplikasi SIG Untuk Pemetaan Zona Tingkat Bahaya Dan Keterpaparan Pemukiman Terhadap Tsunami Kota Denpasar
Authors: Dewi Pegita Urmala , Oktaviana  , Wahdini Mila , Prasiamratri Naira , Alghifarry Muhammad Budzar , Utami Nur Aulia 
Published: November 2020

Denpasar adalah ibukota provinsi Bali termasuk dalam wilayah terindikasi rawan tsunami karena berada didekat pinggir pantai serta memiliki ketinggian dan kemiringan yang relative kecil kepermukaan laut. Pemukiman merupakan aset wilayah yang harus dijaga. Sehingga zona keterpaparan pemukiman terhadap bahaya tsunami dibutuhkan guna memberikan informasi pada penduduk yang tinggal di kota tersebut. Tingkatan keterpaparan dilihat berdasarkan hazard dan element at risk. hazard ini dilihat berdasarkan jarakdari garis pantai, ketinggian, jarak dari sungai, dan juga kemiringan lereng dari daerah Denpasar ini, sedangkan Element at risk atau elemen yang terkena bencana tsunami nya ialah pemukiman. Pemetaan menggunakan teknik overlay, metode skoring dan pembobotan menggunakan software ArcMap 10.3 sebagai pendekatan berbasis Sistem Informasi Geografis (SIG). Hasil penelitian menunjukan bahaya didominasi tingkat sedang dan tinggi. tingkat keterpaparan tsunami pada pemukiman di kota Denpasar ini didominasi oleh tingkat keterpaparan sedang hingga tinggi dengan luas 3,46 km2 atau 27,21% dari luas Kota Denpasar dan terpusat di Kec. Denpasar Timur (25,14 km2) dan Kec. Denpasar Barat (15,02 km2). Selain itu, pemukiman dengan keterpaparan tinggi yakni di Kec. Denpasar Selatan dengan luas 16,80 km2. Dikarenakan wilayah ketinggian yang rendah dan jarak dengan pantai dekat.
Aplikasi Citra Landsat 8 OLI/TIRS Dalam Mengidentifikasi Alterasi Hidrotermal Skala Regional; Studi Kasus Kecamatan Suoh dan Bandar Negeri Suoh
Authors: Nurrochman Arsy , Febriani Rindy , Yuliatama Vivi Putri 
Published: November 2020

Telah dilakukan penelitian mengenai eksplorasi geothermal menggunakan Remote Sensing atau penginderaan jauh. Secara umum, penginderaan jauh merupakan metode yang dilakukan untuk mengumpulkan data atau informasi tanpa perlu menyentuh objek yang akan diteliti. Remote sensing dilakukan dengan menggunakan foto udara ataupun dengan menggunakan citra satelit seperti Landsat-8, ALOS PALSAR, Radar, dan Sentinel. Penginderaan jauh sering digunakan dalam eksplorasi geothermal karena memiliki keunggulan yang dapat mengakses hingga ke daerah terpencil dan tidak memerlukan biaya yang besar. Penelitian ini dilakukan dengan menggunakan Citra Landsat 8 OLI/TIRS yang bertujuan untuk memetakan daerah alterasi hidrotermal secara regional dengan studi kasus Suoh, Lampung Barat. Penelitian dilakukan dengan cara memproses beberapa band dengan memiliki rentang pixel yang dapat merepresentasikan mineral alterasi mineral hidrotermal pada daerah penelitian. Di daerah penelitian, mineral alterasi tersebut terdeteksi dengan warna kuning – orange pada citra komposit 4/2, 6/7, 5 dan 10, dengan menggunakan metode density slicing. Dari penelitian ini didapatkan luas daerah dengan batuan teralterasi hidrotermal mencapai 223H.