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Articles 1 - 30 of 545
Full-Text Articles in Engineering
Utilizing Hybrid Machine Learning Techniques And Gridded Precipitation Data For Advanced Discharge Simulation In Under-Monitored River Basins, Reza Morovati, Ozgur Kisi
Utilizing Hybrid Machine Learning Techniques And Gridded Precipitation Data For Advanced Discharge Simulation In Under-Monitored River Basins, Reza Morovati, Ozgur Kisi
Civil and Environmental Engineering Faculty Publications
This study addresses the challenge of utilizing incomplete long-term discharge data when using gridded precipitation datasets and data-driven modeling in Iran's Karkheh basin. The Multilayer Perceptron Neural Network (MLPNN), a rainfall-runoff (R-R) model, was applied, leveraging precipitation data from the Asian Precipitation—Highly Resolved Observational Data Integration Toward Evaluation (APHRODITE), Global Precipitation Climatology Center (GPCC), and Climatic Research Unit (CRU). The MLPNN was trained using the Levenberg–Marquardt algorithm and optimized with the Non-dominated Sorting Genetic Algorithm-II (NSGA-II). Input data were pre-processed through principal component analysis (PCA) and singular value decomposition (SVD). This study explored two scenarios: Scenario 1 (S1) used in …
Water Stress Index And Stomatal Conductance Under Different Irrigation Regimes With Thermal Sensors In Rice Fields On The Northern Coast Of Peru, Lia Ramos-Fernández, Maria Gonzales-Quiquia, José Huanuqueño-Murillo, David Tito-Quispe, Elizabeth Heros-Aguilar, Lisveth Flores Del Pino, Alfonso Torres-Rua
Water Stress Index And Stomatal Conductance Under Different Irrigation Regimes With Thermal Sensors In Rice Fields On The Northern Coast Of Peru, Lia Ramos-Fernández, Maria Gonzales-Quiquia, José Huanuqueño-Murillo, David Tito-Quispe, Elizabeth Heros-Aguilar, Lisveth Flores Del Pino, Alfonso Torres-Rua
Civil and Environmental Engineering Faculty Publications
In the face of the climate change crisis, the increase in air temperature negatively impacts rice crop productivity due to stress from water scarcity. The objective of this study was to determine the rice crop water stress index (CWSI) and stomatal conductance (Gs) under different irrigation regimes, specifically continuous flood irrigation treatments (CF) and irrigations with alternating wetting and drying (AWD) at water levels of 5 cm, 10 cm, and 20 cm below the soil surface (AWD5, AWD10, and AWD20) in an experimental area of INIA-Vista Florida and in six commercial areas of the …
Reproducibility Starts At The Source: R, Python, And Julia Packages For Retrieving Usgs Hydrologic Data, Timothy O. Hodson, Laura A. Decicco, Jayaram A. Hariharan, Lee F. Stanish, Scott Black, Jeffery S. Horsburgh
Reproducibility Starts At The Source: R, Python, And Julia Packages For Retrieving Usgs Hydrologic Data, Timothy O. Hodson, Laura A. Decicco, Jayaram A. Hariharan, Lee F. Stanish, Scott Black, Jeffery S. Horsburgh
Civil and Environmental Engineering Faculty Publications
Much of modern science takes place in a computational environment, and, increasingly, that environment is programmed using R, Python, or Julia. Furthermore, most scientific data now live on the cloud, so the first step in many workflows is to query a cloud database and load the response into a computational environment for further analysis. Thus, tools that facilitate programmatic data retrieval represent a critical component in reproducible scientific workflows. Earth science is no different in this regard. To fulfill that basic need, we developed R, Python, and Julia packages providing programmatic access to the U.S. Geological Survey’s National Water Information …
Permeable Concrete Barriers To Control Water Pollution: A Review, Rehab O. Abdel Rahman, Ahmed M. El-Kamash, Yung-Tse Hung
Permeable Concrete Barriers To Control Water Pollution: A Review, Rehab O. Abdel Rahman, Ahmed M. El-Kamash, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
Permeable concrete is a class of materials that has long been tested and implemented to control water pollution. Its application in low-impact development practices has proved its efficiency in mitigating some of the impacts of urbanization on the environment, including urban heat islands, attenuation of flashfloods, and reduction of transportation-related noise. Additionally, several research efforts have been directed at the dissemination of these materials for controlling pollution via their use as permeable reactive barriers, as well as their use in the treatment of waste water and water purification. This work is focused on the potential use of these materials as …
Antimicrobial Efficacy And Hplc Analysis Of Polyphenolic Compounds In A Whole-Plant Extract Of Eryngium Campestre, Abdulaziz A. Al-Askar, Shimaa Bashir, Abdallah E. Mohamed, Omaima A. Sharaf, Rokaia Nabil, Yiming Su, Ahmed Abdelkhalek, Said I. Behiry
Antimicrobial Efficacy And Hplc Analysis Of Polyphenolic Compounds In A Whole-Plant Extract Of Eryngium Campestre, Abdulaziz A. Al-Askar, Shimaa Bashir, Abdallah E. Mohamed, Omaima A. Sharaf, Rokaia Nabil, Yiming Su, Ahmed Abdelkhalek, Said I. Behiry
Civil and Environmental Engineering Faculty Publications
Due to the constant increase in the number of plant diseases and the lack of available treatments, there has been a growing interest in plant extracts over the past few decades. Numerous studies suggest that plant extract molecules possess valuable antimicrobial activities, particularly against fungi and bacteria. This suggests that these biomaterials could potentially serve as attractive therapeutic options for the treatment of phytopathogen infections. In the present study, we investigated and analyzed the methanolic extract of Eryngium campestre L. whole plant extract using HPLC. The analysis revealed the presence of several polyphenolic constituents, with benzoic acid, catechol, quercetin, vanillic …
Evaluation Of Temperature-Index And Energy-Balance Snow Models For Hydrological Applications In Operational Water Supply Forecasts, Tian Gan, David G. Tarboton, Tseganeh Z. Gichamo
Evaluation Of Temperature-Index And Energy-Balance Snow Models For Hydrological Applications In Operational Water Supply Forecasts, Tian Gan, David G. Tarboton, Tseganeh Z. Gichamo
Civil and Environmental Engineering Faculty Publications
In the western United States, snow accumulation, storage, and ablation affect seasonal runoff. Thus, the prediction of snowmelt is essential to improve the reliability of water supply forecasts to guide water allocation and operational decisions. The current method used at the Colorado Basin River Forecast Center (CBRFC) couples the SNOW-17 temperature index snow model and the Sacramento Soil Moisture Accounting (SAC-SMA) runoff model in a lumped approach. Limitations in parameter transferability and calibration requirements for changing conditions with the temperature-index model motivated this research, in which new avenues were investigated to assess and prototype the application of an energy-balance snow …
Swietenia Mahagoni Leaves Extract: Antifungal, Insecticidal, And Phytochemical Analysis, Wael M. Khamis, Ahmed A. Heflish, Sarah El-Messeiry, Said I. Behiry, Abdulaziz A. Al-Askar, Yiming Su, Ahmed Abdelkhalek, Mohamed K. Gaber
Swietenia Mahagoni Leaves Extract: Antifungal, Insecticidal, And Phytochemical Analysis, Wael M. Khamis, Ahmed A. Heflish, Sarah El-Messeiry, Said I. Behiry, Abdulaziz A. Al-Askar, Yiming Su, Ahmed Abdelkhalek, Mohamed K. Gaber
Civil and Environmental Engineering Faculty Publications
In this study, we investigated the antifungal properties of an acetone extract derived from the leaves of Swietenia mahagoni (SMAL) against two isolated fungi, Fusarium equiseti (OQ820153) and Rhizoctonia solani (OQ820152), from rice sheath. The extract was effective in inhibiting the growth of both fungi at the highest concentration tested, 3000 μg·mL−1. Laboratory tests on the LC20 of SMAL extract (49.86 mg·L−1) versus pyriproxyfen 10% EC (1.96 mg·L−1) were accomplished on Aphis gossypii Glover. The extract potently reduced the survival of the nymphs (49.58%) more than the other treatments. The longevity of nymphs treated …
Review: Inelastic Constitutive Modeling: Polycrystalline Materials, Mirza Baig, Josiah Owusu-Danquah, Anne A. Campbell, Stephen F. Duffy Phd, Pe
Review: Inelastic Constitutive Modeling: Polycrystalline Materials, Mirza Baig, Josiah Owusu-Danquah, Anne A. Campbell, Stephen F. Duffy Phd, Pe
Civil and Environmental Engineering Faculty Publications
This article provides a literature review that details the development of inelastic constitutive modeling as it relates to polycrystalline materials. This review distinguishes between inelastic constitutive models that account for nonlinear behavior at the microstructural level, time-independent classic plasticity models, and time-dependent unified models. Particular emphasis is placed on understanding the underlying theoretical framework for unified viscoplasticity models where creep and classical plasticity behavior are considered the result of applied boundary conditions instead of separable rates representing distinct physical mechanisms. This article establishes a clear understanding of the advantages of the unified approach to improve material modeling. This review also …
Nematocidal And Bactericidal Activities Of Green Synthesized Silver Nanoparticles Mediated By Ficus Sycomorus Leaf Extract, Dina Elkobrosy, Abdulaziz A. Al-Askar, Hamada El-Gendi, Yiming Su, Rokaia Nabil, Ahmed Abdelkhalek, Said Behiry
Nematocidal And Bactericidal Activities Of Green Synthesized Silver Nanoparticles Mediated By Ficus Sycomorus Leaf Extract, Dina Elkobrosy, Abdulaziz A. Al-Askar, Hamada El-Gendi, Yiming Su, Rokaia Nabil, Ahmed Abdelkhalek, Said Behiry
Civil and Environmental Engineering Faculty Publications
Nanoparticles effectively control most plant pathogens, although research has focused more on their antimicrobial than their nematocidal properties. This study synthesized silver nanoparticles (Ag-NPs) through a green biosynthesis method using an aqueous extract of Ficus sycomorus leaves (FS-Ag-NPs). The nanoparticles were characterized using SEM, TEM, EDX, zeta sizer, and FTIR. The TEM results showed that the synthesized NPs were nanoscale and had an average particle size of 33 ± 1 nm. The elemental silver signal at 3 keV confirmed the formation of Ag-NPs from an aqueous leaf extract of F. sycomorus. The FTIR analysis revealed the existence of several …
A Comprehensive Study On Non-Proprietary Ultra-High-Performance Concrete Containing Supplementary Cementitious Materials, Seyedsaleh Mousavinezhad, Gregory J. Gonzales, William K. Toledo, Judith M. Garcia, Craig M. Newston, Srinivas Allena
A Comprehensive Study On Non-Proprietary Ultra-High-Performance Concrete Containing Supplementary Cementitious Materials, Seyedsaleh Mousavinezhad, Gregory J. Gonzales, William K. Toledo, Judith M. Garcia, Craig M. Newston, Srinivas Allena
Civil and Environmental Engineering Faculty Publications
Ultra-high performance concrete (UHPC) is a novel cement-based material with exceptional mechanical and durability properties. Silica fume, the primary supplementary cementitious material (SCM) in UHPC, is expensive in North America, so it is often substituted with inexpensive class F fly ash. However, future availability of fly ash is uncertain as the energy industry moves toward renewable energy, which creates an urgent need to find cost-effective and environmentally friendly alternatives to fly ash. This study investigated replacing cement, fly ash, and silica fume in UHPC mixtures with ground granulated blast-furnace slag (GGBFS), metakaolin, and a natural pozzolan (pumicite). To identify acceptable …
Physicochemical Technique In Municipal Solid Waste (Msw) Landfill Leachate Remediation: A Review, Hamidi Abdul Aziz, Siti Fatihah Ramli, Yung-Tse Hung
Physicochemical Technique In Municipal Solid Waste (Msw) Landfill Leachate Remediation: A Review, Hamidi Abdul Aziz, Siti Fatihah Ramli, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
Leachate generation is among the main challenging issues that landfill operators must handle. Leachate is created when decomposed materials and rainwater pass through the waste. Leachate carries many harmful pollutants, with high concentrations of BOD, COD, colour, heavy metals, ammoniacal nitrogen (NH3-N), and other organic and inorganic pollutants. Among them, COD, colour, and NH3-N are difficult to be completely eliminated, especially with a single treatment. They should be handled by appropriate treatment facilities before being safely released into the environment. Leachate remediation varies based on its properties, the costs of operation and capital expenditures, as well as the rules and …
Water Quality Engineering And Wastewater Treatment Ii, Yung-Tse Hung, Rehab Abdel Rahman, Hamidi Abdul Aziz, Issam A. Al-Khatib, Tsuyoshi Imai
Water Quality Engineering And Wastewater Treatment Ii, Yung-Tse Hung, Rehab Abdel Rahman, Hamidi Abdul Aziz, Issam A. Al-Khatib, Tsuyoshi Imai
Civil and Environmental Engineering Faculty Publications
In this respect, the modeling of the organic matter removal kinetics from municipal sewerage in horizontal subsurface flow CWs was carried out using a conventional first-order model and sigmoidal k-n model [[12]]. Water is an essential natural compound on earth; all life forms on our planet need water to function properly. The presented water management research in this Special Issue aimed to assess natural water quality in different areas, i.e., Brazil, Palestine, and China. [Extracted from the article]
Enhancing The Biological Oxidation Of H2s In A Sewer Pipe With Highly Conductive Concrete And Electricity-Producing Bacteria, Huy Thanh Vo, Tsuyoshi Imai, Masato Fukushima, Kanathip Promnuan, Tasuma Suzuki, Hiraku Sakuma, Takashi Hitomi, Yung-Tse Hung
Enhancing The Biological Oxidation Of H2s In A Sewer Pipe With Highly Conductive Concrete And Electricity-Producing Bacteria, Huy Thanh Vo, Tsuyoshi Imai, Masato Fukushima, Kanathip Promnuan, Tasuma Suzuki, Hiraku Sakuma, Takashi Hitomi, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
Hydrogen sulfide (H2S) generated in sewer systems is problematic to public health and the environment, owing to its corrosive consequences, odor concerns, and poison control issues. In a previous work, conductive concrete, based on amorphous carbon with a mechanism that operates as a microbial fuel cell was investigated. The objective of the present study is to develop additional materials for highly conductive concrete, to mitigate the concentration of H2S in sewer pipes. Adsorption experiments were conducted to elucidate the role of the H2S reduction. Additionally, electricity-producing bacteria (EPB), isolated from a municipal wastewater treatment plant, were inoculated to improve the …
Influence Of Salts On The Photocatalytic Degradation Of Formic Acid In Wastewater, Azzah Nazihah Che Abdul Rahim, Shotaro Yamada, Haruki Bonkohara, Tsuyoshi Imai, Yung-Tse Hung, Izumi Kumakiri
Influence Of Salts On The Photocatalytic Degradation Of Formic Acid In Wastewater, Azzah Nazihah Che Abdul Rahim, Shotaro Yamada, Haruki Bonkohara, Tsuyoshi Imai, Yung-Tse Hung, Izumi Kumakiri
Civil and Environmental Engineering Faculty Publications
Conventional wastewater treatment technologies have difficulties in feasibly removing persistent organics. The photocatalytic oxidation of these contaminants offers an economical and environmentally friendly solution. In this study, TiO2 membranes and Ag/TiO2 membranes were prepared and used for the decomposition of dissolved formic acid in wastewater. The photochemical deposition of silver on a TiO2 membrane improved the decomposition rate. The rate doubled by depositing ca. 2.5 mg of Ag per 1 g of TiO2. The influence of salinity on formic acid decomposition was studied. The presence of inorganic salts reduced the treatment performance of the TiO2 membranes to half. Ag/TiO2 membranes …
Development Of Non-Proprietary Ultra-High Performance Concrete Mixtures, Tawsif Mohammad Hasan, Levi Gilbert, Srinivas Allena, Josiah Owusu-Danquah, Anthony Torres
Development Of Non-Proprietary Ultra-High Performance Concrete Mixtures, Tawsif Mohammad Hasan, Levi Gilbert, Srinivas Allena, Josiah Owusu-Danquah, Anthony Torres
Civil and Environmental Engineering Faculty Publications
The development of non-proprietary Ultra-High Performance Concrete (UHPC) is one way to reduce the initial cost of construction. However, workability is a major issue for which such mixtures are not practical in field conditions. Ultra-high performance cannot be achieved in field conditions if the concrete is not placed, finished, and compacted properly during placement. In this research, six UHPC mixtures were developed (three with steel fibers and three without fibers) using materials which are readily available on the local marketplace with water-to-cementitious materials ratios ranging between 0.17 to 0.30. The workability was determined using standard ASTM flow table apparatus, and …
Application Of Conductive Concrete As A Microbial Fuel Cell To Control H2s Emission For Mitigating Sewer Corrosion, Tsuyoshi Imai, Huy Thanh Vo, Masato Fukushima, Tasuma Suzuki, Hiraku Sakuma, Takashi Hitomi, Yung-Tse Hung
Application Of Conductive Concrete As A Microbial Fuel Cell To Control H2s Emission For Mitigating Sewer Corrosion, Tsuyoshi Imai, Huy Thanh Vo, Masato Fukushima, Tasuma Suzuki, Hiraku Sakuma, Takashi Hitomi, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
Localized biogenic corrosion and extrication of annoying odors caused by hydrogen sulfide (H2S) have long been a big problem in the management of urban sewer systems. H2S emission control in sewers via chemically or biologically normal oxidation processes has also been investigated extensively and is costly. The objective of this work was to develop a new technology to mitigate the concentration of H2S in sewer pipes using conductive concrete. Experimental results after 66 days show that the concentration of hydrogen sulfide significantly decreased when conductive concrete was used as a microbial fuel cell. Both ordinary Portland cement and conductive concrete …
Introductory Chapter: Uncertainty Management To Support Pollution Prevention And Control Decisions., Rehab O, Abdel Rahman, Yung-Tse Hung
Introductory Chapter: Uncertainty Management To Support Pollution Prevention And Control Decisions., Rehab O, Abdel Rahman, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
No abstract provided.
Biological Treatment Of Cannery Wastes, Yung-Tse Hung, Seyedkiarash Sharifiilierdy, Howard H. Paul, Christopher R. Huhnke, Rehab O, Abdel Rahman
Biological Treatment Of Cannery Wastes, Yung-Tse Hung, Seyedkiarash Sharifiilierdy, Howard H. Paul, Christopher R. Huhnke, Rehab O, Abdel Rahman
Civil and Environmental Engineering Faculty Publications
This chapter reviews various methods of cannery wastewater biological treatment, namely up-flow anaerobic sludge blanket (UASB), sequencing batch reactor (SBR), three-stage aerobic rotating biological contactor (RBC), three sequentially arranged reactors (anaerobic-anoxic-aerobic reactors), lagooning, and anaerobic digestion. The general principles for dealing with the uncertainty of general wastewater treatment plants are applied to control the uncertainty in cannery wastewater treatment. An overview of on the application of Monte Carlo, support vector machine (SVM), artificial neural network (ANN), and genetic algorithm to manage the uncertainty in the biological treatment of wastewater is provided.
Percutaneous-Reinforced Osteoplasty: A Review Of Emerging Treatment Strategies For Bone Interventions, Nischal Koirala, Jyotsna Joshi, Stephen F. Duffy, Gordon Mclennan
Percutaneous-Reinforced Osteoplasty: A Review Of Emerging Treatment Strategies For Bone Interventions, Nischal Koirala, Jyotsna Joshi, Stephen F. Duffy, Gordon Mclennan
Civil and Environmental Engineering Faculty Publications
Percutaneous-reinforced osteoplasty is currently being investigated as a possible therapeutic procedure for fracture stabilization in high-risk patients, primarily in patients with bone metastases or osteoporosis. For these patients, a percutaneous approach, if structurally sound, can provide a viable method for treating bone fractures without the physiologic stress of anesthesia and open surgery. However, the low strength of fixation is a common limitation that requires further refinement in scaffold design and selection of materials, and may potentially benefit from tissue-engineering-based regenerative approaches. Scaffolds that have tissue regenerative properties and low inflammatory response promote rapid healing at the fracture site and are …
Statistical Modeling And Optimization Of Process Parameters For 2, 4-Dichlorophenoxyacetic Acid Removal By Using Ac/Pdmaema Hydrogel Adsorbent: Comparison Of Different Rsm Designs And Ann Training Methods, Irvan Dahlan, Emilia Eizleen Md Azhar, Siti Roshayu Hassan, Hamidi Abdul Aziz, Yung-Tse Hung
Statistical Modeling And Optimization Of Process Parameters For 2, 4-Dichlorophenoxyacetic Acid Removal By Using Ac/Pdmaema Hydrogel Adsorbent: Comparison Of Different Rsm Designs And Ann Training Methods, Irvan Dahlan, Emilia Eizleen Md Azhar, Siti Roshayu Hassan, Hamidi Abdul Aziz, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
In this study, the response surface methodology (RSM) and artificial neural network (ANN) were employed to study the adsorption process of 2,4-dichlorophenoxyacetic acid (2,4-D) by using modified hydrogel, i.e., activated carbon poly(dimethylaminoethyl methacrylate) (AC/PDMAEMA hydrogel). The effect of pH, the initial concentration of 2,4-D and the activated carbon content on the removal of 2,4-D and adsorption capacity were investigated through the face-centered composite design (FCCD), optimal design and two-level factorial design. The response surface plot suggested that higher removal of 2,4-D and adsorption capacity could be achieved at the higher initial concentration of 2,4-D and lower pH and activated carbon …
Effects Of Stepwise Temperature Shifts In Anaerobic Digestion For Treating Municipal Wastewater Sludge: A Genomic Study, Gede Adi Wiguna Sudiartha, Tsuyoshi Imai, Yung-Tse Hung
Effects Of Stepwise Temperature Shifts In Anaerobic Digestion For Treating Municipal Wastewater Sludge: A Genomic Study, Gede Adi Wiguna Sudiartha, Tsuyoshi Imai, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
In wastewater treatment plants (WWTP), anaerobic digester (AD) units are commonly operated under mesophilic and thermophilic conditions. In some cases, during the dry season, maintaining a stable temperature in the digester requires additional power to operate a conditioning system. Without proper conditioning systems, methanogens are vulnerable to temperature shifts. This study investigated the effects of temperature shifts on CH4 gas production and microbial diversity during anaerobic digestion of anaerobic sewage sludge using a metagenomic approach. The research was conducted in lab-scale AD under stepwise upshifted temperature from 42 to 48 ◦C. The results showed that significant methanogen population reduction during …
Cesspits As Onsite Sanitation Facilities In The Non-Sewered Palestinian Rural Areas: Users’ Satisfaction, Needs And Perception., Rehab Thaher, Nidal Mahmoud, Issam A. Al-Khatib, Yung-Tse Hung
Cesspits As Onsite Sanitation Facilities In The Non-Sewered Palestinian Rural Areas: Users’ Satisfaction, Needs And Perception., Rehab Thaher, Nidal Mahmoud, Issam A. Al-Khatib, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
The main aim of this research was to assess the problems of using cesspits in the non-sewered areas in the West Bank of Palestine by the means of a questionnaire, with a sample size of 485 households, targeting the cesspits’ owners. People who use cesspits for house onsite wastewater management are not satisfied with them, and most of them complain about high disturbance during discharge of the cesspits (75.5%). Emptying cesspits represents a financial burden, costing 6% of the households’ monthly income. The frequency of cesspits’ emptying decreases substantially when there are onsite GWTPs. People accept that constructing a house …
Influence Of Particle Size And Zeta Potential In Treating Highly Coloured Old Landfill Leachate By Tin Tetrachloride And Rubber Seed, Siti Fatihah Ramli, Hamidi Abdul Aziz, Fatehah Mohd Omar, Mohd Suffian Yusoff, Herni Halim, Mohamad Anuar Kamaruddin, Kamar Shah Ariffin, Yung-Tse Hung
Influence Of Particle Size And Zeta Potential In Treating Highly Coloured Old Landfill Leachate By Tin Tetrachloride And Rubber Seed, Siti Fatihah Ramli, Hamidi Abdul Aziz, Fatehah Mohd Omar, Mohd Suffian Yusoff, Herni Halim, Mohamad Anuar Kamaruddin, Kamar Shah Ariffin, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
Old leachate normally has a low organic compound content, poor biodegradability and is hard to biologically treat. The efficacy of tetravalent metal salts as a coagulant and the application of a natural coagulant as a flocculant in landfill leachate treatment is still inconclusive. Hence, this study aimed to evaluate the potential application of tin tetrachloride (SnCl4 ) as the main coagulant and the rubber seed (Hevea brasiliensis) (RS) as the natural coagulant aid as the sole treatment in eradicating highly coloured and turbid stabilised landfill leachate present at one of the old local landfills in Malaysia. The standard jar test …
Heavy Metals In Harvested Rainwater Used For Domestic Purposes In Rural Areas: Yatta Area, Palestine As A Case Study., Fathi Anabtawi, Nidal Mahmoud, Issam A. Al-Khatib, Yung-Tse Hung
Heavy Metals In Harvested Rainwater Used For Domestic Purposes In Rural Areas: Yatta Area, Palestine As A Case Study., Fathi Anabtawi, Nidal Mahmoud, Issam A. Al-Khatib, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
Rainwater harvesting is considered one of the most important water resources in the Palestinian countryside. In this research, the study area chosen for the study was Yatta town in Hebron city. 75 water samples were collected from 74 cisterns in a number of neighborhoods in Yatta, and a structured household survey was conducted with the same households where the water samples were collected. Statistical analysis was made using the SPSS software. An analysis for the samples was made using ICP-MS to test the existence of a number of heavy metals, namely Pb, Cr, Mn, Co, Ni, Cu, Zn and Cd. …
Comparison Of Dye Wastewater Treatment Methods: A Review., Bukola M. Adesanmi, Yung-Tse Hung, Howard Paul, Christopher Huhnke
Comparison Of Dye Wastewater Treatment Methods: A Review., Bukola M. Adesanmi, Yung-Tse Hung, Howard Paul, Christopher Huhnke
Civil and Environmental Engineering Faculty Publications
Wastewater is produced by numerous dyes producing and dye consuming industries in their process activities especially the textile industry. These effluents become toxic and harmful to the living things and the environment if not properly treated before being discharged to the environment. In recent decades dye wastewater has been becomes a growing water pollution problem because it is one of the most difficult to treat. To put an end to this problem, viable, efficient, and sustainable method of treatment of dye wastewater and color removal needs to be established. Several research papers have been done over the years on various …
Kinetic Study Of The Anaerobic Digestion Of Recycled Paper Mill Effluent (Rpme) By Using A Novel Modified Anaerobic Hybrid Baffled (Mahb) Reactor, Siti Roshayu Hassan, Yung-Tse Hung, Irvan Dahlan, Hamidi Abdul Aziz
Kinetic Study Of The Anaerobic Digestion Of Recycled Paper Mill Effluent (Rpme) By Using A Novel Modified Anaerobic Hybrid Baffled (Mahb) Reactor, Siti Roshayu Hassan, Yung-Tse Hung, Irvan Dahlan, Hamidi Abdul Aziz
Civil and Environmental Engineering Faculty Publications
The process kinetics of an anaerobic digestion process for treating recycled paper mill effluent (RPME) was investigated. A laboratory-scale modified anaerobic hybrid baffled reactor (MAHB) was operated at hydraulic retention times of 1, 3, 5, and 7 days, and the results were analyzed for the kinetic models. A kinetic study was conducted by examining the phase kinetics of the anaerobic digestion process, which were divided into three main stages: hydrolysis kinetics, acetogenesis kinetics, and methane production kinetics. The study demonstrated that hydrolysis was the rate-limiting step. The applied Monod and Contois kinetic models showed satisfactory prediction with µmax values of …
A Comparison Of National Water Model Retrospective Analysis Snow Outputs At Snow Telemetry Sites Across The Western United States, Irene Garousi-Nejad, David G. Tarboton
A Comparison Of National Water Model Retrospective Analysis Snow Outputs At Snow Telemetry Sites Across The Western United States, Irene Garousi-Nejad, David G. Tarboton
Civil and Environmental Engineering Faculty Publications
This study compares the US National Water Model (NWM) reanalysis snow outputs to observed snow water equivalent (SWE) and snow-covered area fraction (SCAF) at snow telemetry (SNOTEL) sites across the Western United States. SWE was obtained from SNOTEL sites, while SCAF was obtained from moderate resolution imaging spectroradiometer (MODIS) observations at a nominal 500 m grid scale. Retrospective NWM results were at a 1000 m grid scale. We compared results for SNOTEL sites to gridded NWM and MODIS outputs for the grid cells encompassing each SNOTEL site. Differences between modelled and observed SWE were attributed to both model errors, as …
Applications Of Nano-Zeolite In Wastewater Treatment: An Overview, Rehab O, Abdel Rahman, Ahmed M. El-Kamash, Yung-Tse Hung
Applications Of Nano-Zeolite In Wastewater Treatment: An Overview, Rehab O, Abdel Rahman, Ahmed M. El-Kamash, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
Nano-zeolite is an innovative class of materials that received recognition for its potential use in water and tertiary wastewater treatment. These applications include ion-exchange/sorption, photo-degradation, and membrane separation. The aim of this work is to summarize and analyze the current knowledge about the utilization of nano-zeolite in these applications, identify the gaps in this field, and highlight the challenges that face the wide scale applications of these materials. Within this context, an introduction to water quality, water and wastewater treatment, utilization of zeolite in contaminant removal from water was addressed and linked to its structure and the advances in zeolite …
Lessons From Real-Time, Online Collaborative Modeling To Discuss More Adaptive Reservoir Operations, David E. Rosenberg
Lessons From Real-Time, Online Collaborative Modeling To Discuss More Adaptive Reservoir Operations, David E. Rosenberg
Civil and Environmental Engineering Faculty Publications
This work had the purpose to model and discuss in real-time more adaptive Colorado River reservoir operations with manager and experts. I created real-time, online collaborative modeling environments by using an interactive web spreadsheet (Google Sheet) during video conference sessions. 26 Colorado River managers and experts participated. Within each session, up to 6 people from the same stakeholder group simultaneously consumed, saved, and traded water in six basin water accounts, protected reservoirs, and sustained endangered, native fish of the Grand Canyon. The collaboration differed from prior studies that excluded stakeholders, extracted data from participants, had a lead modeler or facilitation …
Reduction Of Cod And Highly Coloured Mature Landfill Leachate By Tin Tetrachloride With Rubber Seed And Polyacrylamide, Siti Fatihah Ramli, Hamidi Abdul Aziz, Fatehah Mohd Omar, Mohd Suffian Yusoff, Herni Halim, Mohamad Anuar Kamaruddin, Kamar Shah Ariffin, Yung-Tse Hung
Reduction Of Cod And Highly Coloured Mature Landfill Leachate By Tin Tetrachloride With Rubber Seed And Polyacrylamide, Siti Fatihah Ramli, Hamidi Abdul Aziz, Fatehah Mohd Omar, Mohd Suffian Yusoff, Herni Halim, Mohamad Anuar Kamaruddin, Kamar Shah Ariffin, Yung-Tse Hung
Civil and Environmental Engineering Faculty Publications
Tin tetrachloride (SnCl4 ) as a coagulant and rubber seed (Hevea brasiliensis) (RS), and polyacrylamide (PAM) as the coagulant aid were investigated in this work to treat matured and stabilised landfill leachate rich in COD and colour. A standard jar test was conducted at different pH values and dosages of coagulant/coagulant aid. When SnCl4 acted as the primary coagulant, the optimum conditions occurred at pH 8 and 10,000 mg/L dosages, with 97.3% and 81% reductions of colour and COD, respectively. Both RS and PAM were not effective when used alone. When RS was used as the coagulant aid, the dosage …