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SSRN 2024年

作者： Eyube, Edwin Samson Yusuf, I. Omugbe, E. Makasson, C.R. Onate, C.A. Mohammed, B.D. Balami, B.Y. Tahir, A.M. Department of Physics Faculty of Physical Sciences Modibbo Adama University P.M.B. 2076 Adamawa State Yola Nigeria Department of Science Laboratory Technology Gombe State Polytechnic P.M.B. 0190 Bajoga Gombe State Nigeria Department of Physics University of Agriculture and Environmental Sciences Umuagwo P.M.B. 1038 Imo State Nigeria Department of Science Laboratory Technology School of Science and Technology Adamawa State Polytechnic P.M.B. 2146 Adamawa State Yola Nigeria Physics Program College of Agriculture Engineering and Science Bowen University Iwo Osun State Nigeria Department of Science Laboratory Technology Physics Unit The Federal Polytechnic P.M.B. 35 Adamawa State Mubi Nigeria Landmark University Nigeria

This study presents an analytical representation of the internal motion of a diatomic system using the improved Pöschl-Teller potential. The ro-vibrational energy spectrum is derived by solving the radial Schrödinger time independent wave equation (STIWE) under a 2D electromagnetic potential field. Additionally, an explicit equation for magnetic susceptibility is formulated from the vibrational partition function. The analytical models are used to investigate physical properties of CO (X 1∑+), K2 (a 3∑u+), BCl (X 1∑+), and NaK (c 3∑+) molecules. Average percentage absolute deviations (APAD) for the ro-vibrational energy spectrum are calculated as 0.1001%, 0.5306%, 1.2070%, and 0.9779%, respectively, compared to observed data. Numerical results are consistent with existing literature. Furthermore, the study reveals that the magnetic susceptibility of the system increases with temperature and decreases with an increase in magnetic field intensity, indicating its paramagnetic nature © 2024, The Authors. All rights reserved.

关键词： Magnetic susceptibility

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Structuring urban slum areas based on social enrichment in Gumelem Village 5

Structuring urban slum areas based on social enrichment in G...

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5th International Conference on Energy, environmental and Information System, ICENIS 2020

作者： Safitri, Inayati Yuliastuti, Nany Maryono, Maryono Master Program of Environmental Science School of Postgraduate Studies Diponegoro University Indonesia Department of Urban and Regional Planning Faculty Engineering Diponegoro University Indonesia Centre for Green Infrastructure Resilience and Development School of Postgraduate Diponegoro University Indonesia

Gumelem village is one of the slums in the Pemalang Regency, Central Java Province. The area has characteristics such as high population density, the narrowness of the neighborhood road, the location of houses that coincide, the narrow house, and the house is inhabited by several families and does not have a private toilet. The formation of slums is an obstacle in regional development;for this, it is necessary to arrange the area. This study uses the Participatory Research Appraisal (PRA) method to ensure the active involvement of the target group community and place the community as a subject in the activation process. The research results show that social strengthening efforts in the community and government agencies in the management of the slum areas of Gumelem are essential to realizing the success of the slum structuring program. © The Authors, published by EDP sciences, 2020.

关键词： Houses

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The role of waste banks in reducing waste in Gunung Kidul Regency 5

The role of waste banks in reducing waste in Gunung Kidul Re...

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5th International Conference on Energy, environmental and Information System, ICENIS 2020

作者： Faradina, Devita Maryono, Maryono Warsito, Budi Master Program of Environmental Science School of Postgraduate Studies Diponegoro University Indonesia Department of Urban and Regional Planning Faculty Engineering Diponegoro University Indonesia Centre for Green Infrastructure Resilience and Development School of Postgraduate Diponegoro University Indonesia

The waste bank is an alternative waste management in Indonesia. The waste Bank in Gunung Kidul Regency, Yogyakarta is one of the waste banks that has been established and is active until now. The method used to determine the generation and composition of waste is SNI 19-3964-1994. In addition, research data are obtained by observing and interviewing directly in the field, then analyzed by quantitative descriptive. The results showed the average rate of waste generation in Gunung Kidul Regency was 0.48 kg / person / day. The highest composition of waste in Gunung Kidul Regency is organic waste, which is 77.61%, while non-organic waste is 22.39%. At present, the Waste Bank in Gunung Kidul Regency is able to reduce waste by 0.86% with a total of 6,423 m3 / year reduced waste. The benefits of the existence of a waste bank, among others, are in the field of waste management, in terms of economic and social aspects. The potential for waste recycling is 17.49% from 22.39% of the total non-organic waste. © The Authors, published by EDP sciences, 2020.

关键词： Waste management

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Molecular interaction volume model of mixing enthalpy for molten salt system: An integrated calorimetry-model case study of LaCl3-(LiCl-KCl)

arXiv

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arXiv 2024年

作者： Goncharov, Vitaliy G. Smith, William Li, Jiahong Eakin, Jeffrey A. Reinhart, Erik D. Boncella, James Gibson, Luke D. Bryantsev, Vyacheslav S. Gong, Rushi Shang, Shun-Li Liu, Zi-Kui Xu, Hongwu Clark, Aurora Guo, Xiaofeng Department of Chemistry Washington State University PullmanWA99164 United States Materials Science and Engineering Program Washington State University PullmanWA99164 United States Computational Sciences and Engineering Division Oak Ridge National Laboratory P.O. Box 2008 Oak RidgeTN37831 United States Chemical Science Division Oak Ridge National Laboratory P.O. Box 2008 Oak RidgeTN37831 United States Department of Materials Science and Engineering Pennsylvania State University University ParkPA16802 United States Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos New MexicoNM87545 United States Arizona State University TempeAZ United States Department of Chemistry The University of Utah Salt Lake CityUT84112 United States

Calorimetric determination of enthalpies of mixing (ΔHmix) of multicomponent molten salts often employs empirical models that lack parameters with clear physical interpretation (e.g., coordination numbers, molar volumes, and pair potentials). Although such physics informed models are not always needed, a thermodynamic understanding of the relationships between excess energies of mixing and local to intermediate solvation structures is particularly important for pyrochemical separation, as is the case for lanthanides (Ln), which are common neutron poisons and critical industrial elements found in spent nuclear fuels. Here we implement the molecular interaction volume model (MIVM) to synthesize information from experimentally measured ΔHmix (using high temperature melt drop calorimetry) and the distribution of solvation structures from ab initio molecular dynamics (AIMD) simulations. This was demonstrated by a case study of molten salt system consisted of LaCl3 mixing with a eutectic LiCl-KCl (58mol% - 42mol%) at 873 K and 1133 K. The parameters modelled from MIVM were used to extrapolate excess Gibbs energy (ΔGmix), and compositional dependence of La3+ activity in the LaCl3-(LiCl-KCl) system. In contrast, by AIMD or polarizable ion model (PIM) simulations, a significant deviation regarding the predicted ΔHmix was seen if computed directly from the molecular dynamic trajectories. The integrated experimental and simulation data within the MIVM formalism are generalizable to a wide variety of molten salts and demonstrate a significant improvement over currently employed methods to study molten salts for nuclear and separations sciences. Copyright © 2024, The Authors. All rights reserved.

关键词： Enthalpy

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Corrigendum to "GenX is not always a better fluorinated organic compound than PFOA: A critical review on aqueous phase treatability by adsorption and its associated cost" [Water Research 205 (2021) 117683]

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Water research 2025年第PT B期268卷 122786页

作者： Hamed Heidari Tauqeer Abbas Yong Sik Ok Daniel C W Tsang Amit Bhatnagar Eakalak Khan Civil and Environmental Engineering and Construction Department University of Nevada Las Vegas NV United States. Korea Biochar Research Center APRU Sustainable Waste Management Program & Division of Environmental Science and Ecological Engineering Korea University Seoul Republic of Korea. Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China. Department of Separation Science LUT School of Engineering Science LUT University Sammonkatu 12 FI-50130 Mikkeli Finland. Civil and Environmental Engineering and Construction Department University of Nevada Las Vegas NV United States. Electronic address: eakalak.khan@unlv.edu.

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Application of vetiver grass (Vetiveria Zizanioides L.) for organic matter removal from contaminated surface water

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Bioresource Technology Reports 2023年 22卷

作者： Nguyen, Minh Ky Hung, Nguyen Tri Quang Nguyen, Cong Manh Lin, Chitsan Nguyen, Tuan Anh Nguyen, Hoang-Lam Ph.D. Program in Maritime Science and Technology National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Faculty of Environment and Natural Resources Nong Lam University Hamlet 6 Linh Trung Ward Thu Duc Dist. Ho Chi Minh City700000 Viet Nam Research Institute for Biotechnology and Environment Nong Lam University Hamlet 6 Linh Trung Ward Thu Duc Dist. Ho Chi Minh City700000 Viet Nam Department of Civil Engineering McGill University Montreal Canada

This study presents the vertical flow constructed wetlands (VFCWs) as a green solution for organic matter removal in contaminated surface water – a case study in Vietnam. The experiments were conducted with hydraulic loading rates (HLRs) of 500 mL/m2/min (T1), 1000 mL/m2/min (T2), and 1500 mL/m2/min (T3) using Vetiver grass (V) and Control (C). The findings indicated that Vetiver grass (Vetiveria Zizanioides L.) based-VFCWs model achieves a removal efficiency of 90 % for biochemical oxygen demand (BOD5) and >80 % for chemical oxygen demand (COD). This could explain the significant contribution of aquatic plants to the VFCWs based on vertical flow characteristics. Analysis of variance showed that HLRs significantly influence the treatment efficiency of BOD5 and COD (P © 2023 Elsevier Ltd

关键词： Irrigation

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Distribution mapping of Open Defecation (OD) houses in East Surabaya based on Geographic Information System (GIS) 1

Distribution mapping of Open Defecation (OD) houses in East ...

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1st International Conference on science and Technology for environmental Protection, ICSTEP 2018

作者： Purnama, M.Y. Soedarti, T. Oktavitri, N.I. Fitriani, N. Study Program of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia

The purpose of this study is to know and locate the distribution of open defecation houses in East Surabaya of Surabaya City, Indonesia. Both of secondary and primary data are required for this research, the secondary data consist of the number of OD houses in East Surabaya and basic map of Surabaya City. Primary data consist of field survey OD houses of legal and illegal status. Mapping is conducted with mapping software based on geographical information system. The result of this research proves that there are 1.083 OD houses in East Surabaya and it is equally distributed throughout East Surabaya. The most OD sub-district (Kelurahan) is Gubeng with approximately 319 houses while the least is Kelurahan Tambaksari with 23 houses. © 2019 IOP Publishing Ltd.

关键词： Houses

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Shin et al. Reply:

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Physical Review Letters 2023年第5期131卷 059602-059602页

作者： Dongbin Shin Nicolas Tancogne-Dejean Jin Zhang Mahmut Sait Okyay Angel Rubio Noejung Park Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science Luruper Chaussee 149 22761 Hamburg Germany Department of Physics and Photon Science Gwangju Institute of Science and Technology (GIST) Gwangju 61005 Republic of Korea Materials Science & Engineering Program Department of Chemical & Environmental Engineering Department of Physics & Astronomy and Department of Chemistry University of California-Riverside Riverside 92521 California USA Nano-Bio Spectroscopy Group Departamento de Fsica de Materiales Universidad del Pas Vasco 20018 San Sebastian Spain Center for Computational Quantum Physics (CCQ) The Flatiron Institute 162 Fifth avenue New York New York 10010 USA Department of Physics Ulsan National Institute of Science and Technology (UNIST) UNIST-gil 50 Ulsan 44919 Korea

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Novel continuous single-step synthesis of nitrogen-modified TiO_2 by flame spray pyrolysis for photocatalytic degradation of phenol in visible light

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Journal of Materials science & Technology 2018年第9期34卷 1494-1502页

作者： Thirupathi Boningari Siva Nagi Reddy Inturi Makram Suidan Panagiotis G.Smirniotis Chemical Engineering Program College of Engineering & Applied Science University of Cincinnati Environmental Engineering College of Engineering & Applied Science University of Cincinnati

A novel rapid and continuous process has developed for the synthesis of nitrogen-doped TiO2（N-TiO2）with flame spray pyrolysis（FSP） method. The nitrogen incorporation into TiO2 was achieved by a facile modification（addition of dilute nitric acid） in the precursor for the synthesis. The catalysts were characterized by X-ray diffraction, Raman spectroscopy, transmission electron microscopy, diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The doping of nitrogen into the TiO2 was confirmed by X-ray photoelectron spectroscopy（XPS） and energy dispersive X-ray（EDX） spectroscopy. The UV-vis spectra of the modified catalysts（with primary N source） exhibited band-gap narrowing for 4 N-TiO2 with band gap energy of 2.89 eV, which may be due to the presence of nitrogen in TiO2 structure. The introduction of secondary N-source（urea） into TiO2 crystal lattice results in additional reduction of the band gap energy to 2.68 eV and shows a significant improvement of visible light absorption. The N-TiO2 nanoparticles modified by using secondary N-source showed significant photocatalytic activity under visible light much higher than TiO2. The higher activity is attributed to the synergetic interaction of nitrogen with the TiO2 lattice. The lowering of the band-gap energy for the flame made N-doped TiO2 materials implies that the nitrogen doping in TiO2 by aerosol method is highly effective in extending the optical response of TiO2 in the visible region. The nitrogen atomic percentage has increased monotonically（0.09%-0.15%）with the increase in primary nitrogen source（nitric acid）, and significantly boosted to 0.97% when secondary nitrogen source（urea） was introduced. The highest rate of phenol degradation was obtained for catalysts with secondary N source due to increase in N content in the catalyst.

关键词： Flame spray pyrolysis（FSP） Titania （TiO2） Visible-light-induced Liquid phase Phenol photodegradation

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Active Degradation-Nitrification Microbial Assemblages in the Hypoxic Zone in a Subtropical Estuary

SSRN

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SSRN 2022年

作者： Lu, Yanhong Cheung, Shunyan Koh, Xiu Pei Xia, Xiaomin Jing, Hongmei Lee, Puiyin Kao, Shuh-Ji Gan, Jianping Dai, Minhan Liu, Hongbin SZU-HKUST Joint PhD Program in Marine Environmental Science Shenzhen University Shenzhen China Department of Ocean Science The Hong Kong University of Science and Technology Hong Kong Division of Environment and Sustainability The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou China CAS Key Laboratory for Experimental Study under Deep-sea Extreme Conditions Institute of Deep-sea Science and Engineering Chinese Academy of Sciences Sanya China State Key Laboratory of Marine Environmental Science Xiamen University China The Hong Kong University of Science and Technology Hong Kong

In 2017 summer, we observed a widespread bottom hypoxic zone at the lower estuary of the Pearl River estuary (PRE). We observed i) bacterial and AOA biomass accumulation, ii) oxygen consumption rates (respiration and nitrification) in the hypoxic zone. The potential microbial interaction of both oxygen-consuming microbes in the hypoxia remained unclear. To investigate the potential microbial interaction between AOA and heterotrophic bacteria in the hypoxic zone, we used bacterial and AOA communities (inferred from 16S rRNA gene and amoA gene, respectively) and multi-comparisons between the co-occurrence networks retrieved from DNA and RNA levels to reflect the pattern. We observed a highly diverse and active bacterial community in the hypoxia zone. The network topology revealed that Gammaproteobacteria, Bacteroidetes (Flavobacteriales), Alphaproteobacteria (Rhodobacterales and Rhodospirillales), Marinimicrobia, Cyanobacteria (Synechococcales), and AOA sublineages were module hubs and connectors, indicating that they were the keystone taxa of the microbial communities. The hub-subnetwork further showed robust co-occurrence between Gammaproteobacteria, Bacteroidetes (Flavobacteriales), Alphaproteobacteria (Rhodobacterales and Rhodospirillales), Marinimicrobia with AOA sublineages, and Nitrospinae (presumably NOB)) reflecting the formation of Degradation-Nitrification microbial assemblage in the hypoxia zone. The subnetworks revealed AOA ecotype-specific modularization and niche partitioning of different AOA sublineages. Interestingly, the recurring co-occurrence of SCM1-like II sublineages with Nitrospinae OTUs formed nitrifiers assemblage in the RNA subnetworks suggested an interaction via nitrite exchange. The Degradation-Nitrification microbial assemblage may contribute substantially to the oxygen consumption in the hypoxia formation in PRE. Our results provide new insight into the nitrifier-associated microbial assemblage that should be further explored in the mar

关键词： Bacteria

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