Nebraska Water And Energy Flux Measurement,
Modeling, And Research Network (Nebflux),
2010
University of Nebraska-Lincoln
Nebraska Water And Energy Flux Measurement, Modeling, And Research Network (Nebflux), Suat Irmak
Department of Agricultural and Biological Systems Engineering: Faculty Publications
Surface energy and water vapor fluxes play a critical role in understanding the response of agro‐ecosystems to changes in environmental and atmospheric parameters. These fluxes play a crucial role in exploring the dynamics of water and energy use efficiencies of these systems. Quantification of the fluxes is also necessary for assessing the impact of land use and management changes on water balances. Accomplishing these goals requires measurement of water vapor and energy exchanges between various vegetation surfaces and microclimates for long‐enough periods to understand the behavior and dynamics involved with the flux transfer so that robust models can be developed …
Testing Of Interactions Between Coal Ash Leachates And Rock Materials For Mine Backfill Evaluations,
2010
School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney 2052, Australia, CSIRO Energy Technology, PMB 7 Menai 2234, Australia
Testing Of Interactions Between Coal Ash Leachates And Rock Materials For Mine Backfill Evaluations, Colin R. Ward, David French, Leanne Stephenson, Ken Riley, Zhongsheng Li
Coal Combustion and Gasification Products Journal Archive
A series of laboratory-based leaching tests has been developed to evaluate the chemical interaction between ash, water and different mine-site rock materials, as a basis for assessing the potential environmental impact of using coal ash as backfill in coal mines. Two different test protocols were used: a two-stage serial batch testing program in which leachate from representative ash samples were allowed to interact separately with relevant rock materials under laboratory conditions, and a single-stage mixed batch testing program in which 50:50 mixtures of the same ashes and rock samples were extracted with water following a similar procedure to leaching tests …
Chemistry Of Coal And Coal Combustion Products From Kentucky Power Plants: Results From The 2007 Sampling, With Emphasis On Selenium,
2010
University of Kentucky, Center for Applied Energy Research, 2540 Research Park Drive, Lexington, KY 40511 USA
Chemistry Of Coal And Coal Combustion Products From Kentucky Power Plants: Results From The 2007 Sampling, With Emphasis On Selenium, James C. Hower, Thomas L. Robl, Gerald A. Thomas, Shelley D. Hopps, Margaret Grider
Coal Combustion and Gasification Products Journal Archive
Kentucky produced over 8 Mt of coal combustion products (CCPs) in 2006, with 30% of the CCPs being utilized, a significant increase from our 1996 and 2001 surveys. As much of the increase is related to increased utilization of flue-gas desulfurization (FGD) gypsum, the increased production of FGD gypsum coincident with the commissioning of new FGD units and the saturation of the (currently) weak market for new construction, the percentage of utilization may decrease by the time of the next planned survey (2011). The concentration of volatile trace elements in the feed coal and in the pulverizer reject, while associated …
An Investigation Of The Behavior Of Raw Calcareous Fly Ash In Mortar Mixtures,
2010
Aristotle University of Thessaloniki, Aristotle University Campus, P.O. Box 482, 54124 Thessaloniki, Greece
An Investigation Of The Behavior Of Raw Calcareous Fly Ash In Mortar Mixtures, Ioanna Papayianni, Eleftherios K. Anastasiou
Coal Combustion and Gasification Products Journal Archive
The behavior of unprocessed calcareous fly ash in cement mortar mixtures is often questionable and unpredictable and that is one of the difficulties in confining these fly ashes within the limits of standards. This work aims at correlating the material characteristics with its behavior in mortar mixtures. An effort is made to understand how three of the reactive constituents; lime (CaO), silica (SiO2), and sulfates (SO3), affect strength and volume stability. Two raw calcareous fly ashes of different composition emanating from the Ptolemaida area, Greece, were systematically tested to define their profile as cementitious agents that could be incorporated in …
Coal Fired Power Station Ash Products And Eu Regulation,
2010
UK Quality Ash Association
Coal Fired Power Station Ash Products And Eu Regulation, Lindon K.A. Sear
Coal Combustion and Gasification Products Journal Archive
The UK has a long history of the use of coal fired power station ash products in a range of applications in construction. These range from use in concrete as a cementitious material through to its use as a fill material in embankments. While there have been no environmental problems associated with these uses, environmental regulations emanating from the European Union (EU) are increasingly impacting on the use of these materials. Unfortunately it is not a single set of regulations that are being applied, but three separate and apparently disconnected initiatives; these are Registration, Evaluation and Authorisation of Chemicals (REACH), …
Enriched Coal Ash Utilization For Augmenting Production Of Rice Under Acid Lateritic Soil,
2010
Department of Agronomy, Birsa Agricultural University, Ranchi, Jharkhand- 834 006, India.
Enriched Coal Ash Utilization For Augmenting Production Of Rice Under Acid Lateritic Soil, S. Karmakar, B.N. Mittra, B.C. Ghosh
Coal Combustion and Gasification Products Journal Archive
The use of industrial wastes such as fly ash (FA) or rice husk ash (RHA), along with paper factory sludge (PFS), farmyard manure (FYM), and chemical fertilizers (CF), under integrated nutrient management, was studied in acid lateritic soil on rice. Application of combined fertilization sources increased growth, yield attributes, and yield (up to 92.3 and 9.7% over control and CF, respectively) of wet season rice. The uptake of N, P, K, Ca, Mg, Fe, Mn, Zn, Cu, and Co was increased under combined fertilization sources. The study also indicated that such integrated plant nutrition system improved physico-chemical properties of soil …
Erosive Wear In Pipelines At Pneumatic Conveying Of Fine Silicon-Containing Materials,
2010
Russia, Moscow Power Engineering Institute (MPEI), Informational and Analytical Center ‘‘Ecology in Power Engineering’’ , 111250 Moscow, Krasnokazarmennaya str.,14
Erosive Wear In Pipelines At Pneumatic Conveying Of Fine Silicon-Containing Materials, Viacheslav Y. Putilov, Vijay K. Agarwal, Irina V. Putilova
Coal Combustion and Gasification Products Journal Archive
Erosive wear is a major operational problem in conveying of hard abrasive bulk materials like silica sand, fly ash, coal dust, etc., in pneumatic conveying systems. Erosion results in emergency downtime of pneumatic conveying installations of ash and slag removal and dust-preparation systems at TPPs caused by holes in pipelines. That leads to worsening of technical, economic, and ecological parameters of thermal power plants as a whole. In MPEI, a model of estimating erosion of rectilinear and curvilinear sections of pneumatic conveying pipelines has been developed. To validate the estimating model developed in the MPEI, experimental investigations in the Indian …
Evaluation Of The Variables That Influence Mercury Capture In Solid Sorbents,
2010
Instituto Nacional del Carbo´n (CSIC). C/ Francisco Pintado Fe Nu 26, 33011 Oviedo, Spain
Evaluation Of The Variables That Influence Mercury Capture In Solid Sorbents, M. Antonia Lopez-Anton, Patricia Abad-Valle, Mercedes Diaz-Somoano, M. Rosa Martinez-Tarazona
Coal Combustion and Gasification Products Journal Archive
Newly obtained results on mercury retention in fly ashes and activated carbons during coal combustion are compared with previous findings. The influence of different variables on mercury capture, including the composition and nature of the sorbents, the composition of the flue gas and the mercury species in gas phase is investigated. Coal-fired utility boilers are currently the largest single-known source of mercury emissions. According to the USEPA’s Information Collection Request (ICR), on average, only 40% of the mercury entering a coal-fired power plant is captured, while 60% is emitted into the atmosphere. Several solid materials, including activated carbons, are considered …
Mechanical Performance Of Pavement Geomaterials Stabilized With Fly Ash In Field Applications,
2010
Department of Civil and Environmental Engineering, Jackson State University, Jackson Mississippi, 39217
Mechanical Performance Of Pavement Geomaterials Stabilized With Fly Ash In Field Applications, Lin Li, Tuncer B. Edil, Craig H. Benson
Coal Combustion and Gasification Products Journal Archive
This paper describes an evaluation of the mechanical performance of fly ash stabilized materials. Soft clay soil, asphaltic recycled pavement material (RPM), and road-surface gravel (RSG) were stabilized using Class C and off-specification fly ashes to create working platforms or stabilized base courses for construction of flexible and rigid pavements at six sites in Wisconsin and Minnesota. California bearing ratio (CBR), resilient modulus (Mr) tests, and unconfined compression (qu) tests were conducted on the subgrade soil, RPM, and RSG alone and on mixtures prepared in the field and the laboratory to evaluate improvements in bearing resistance and stiffness. Fly ash …
Manufactured Coal Ash Aggregates For Aqueous Tnt Sorption,
2010
Department of Civil Engineering, University of Puerto Rico, Mayaguez, PR 00681
Manufactured Coal Ash Aggregates For Aqueous Tnt Sorption, Sangchul Hwang, Victor Hernandez
Coal Combustion and Gasification Products Journal Archive
No abstract provided.
Mineralogy And Leaching Characteristics Of Coal Ash From A Major Brazilian Power Plant,
2010
Catarinense Institute of Environmental Research and Human Development– IPADHC, Capivari de Baixo, Santa Catarina, Brazil
Mineralogy And Leaching Characteristics Of Coal Ash From A Major Brazilian Power Plant, Luis F.O. Silva, Colin R. Ward, James C. Hower, Maria Izquierdo, Frans Waanders, Marcos L.S. Oliveira, Zhongsheng Li, Rachel S. Hatch, Xavier Querol
Coal Combustion and Gasification Products Journal Archive
The feed coals, fly ashes and bottom ashes collected from seven different units in a major Brazilian PF power plant have been subjected to comprehensive mineralogical, geochemical, and petrographic studies, to investigate the links between feed coal and ash characteristics. Ashes from two of the units were collected while the coal was being co-fired with oil as part of the boiler start-up procedure, allowing the impact of oil co-firing on ash characteristics also to be evaluated. High proportions of unburnt carbon and high proportions of retained sulphur were found in the fly ashes produced during oil co-firing, probably reflecting less …
Precipitation Of Germanium From Coal Fly Ash Leachates,
2010
University of Seville, School of Engineering, Chemical and Environmental Engineering Department, Camino de los Descubrimientos, Seville (Spain), phone: 011-03495-448-1379, fax: 011-034-95-448-6082,
Precipitation Of Germanium From Coal Fly Ash Leachates, Fatima Arroyo, Constantino Fernandez-Pereira, Pilar Coca
Coal Combustion and Gasification Products Journal Archive
The valorization of a coal gasification fly ash was studied by leaching the fly ash using different aqueous solutions followed by the subsequent precipitation of the germanium solubilized from the ash. Experimental investigations were focused on the precipitation of a germanium2catechol (CAT) complex with cetyl trimethyl ammonium bromide (CTAB). The influences of pH and amounts of CTAB and CAT on the precipitation yield were investigated. To this aim, a central composite rotatable design and ANOVA Design Expert 7.0.3 Wiley software were employed for experimental design and analysis of the results. Thus, the independent and combined effects of pH, CAT/Ge and …
The Effect Of Drag-Reducing Additives On The Rheological Properties Of Fly Ash-Water Suspensions At Varying Temperature Environment,
2010
Department of Mining Engineering, National Institute of Technology, Rourkela, India
The Effect Of Drag-Reducing Additives On The Rheological Properties Of Fly Ash-Water Suspensions At Varying Temperature Environment, H.K. Naik, M.K. Mishra, Rao Karanam U.M.
Coal Combustion and Gasification Products Journal Archive
Fly ash transportation and disposal is a major problem in India. Presently fly ash is being transported as lean slurry in pipe lines requiring about 80 to 85% of water which, in turn, consumes more energy input. The objective of the present study is to evaluate the rheological characteristics of fly ash slurry at varying temperatures with and without an additive to facilitate smooth flow in the pipelines. Six fly ash slurry samples were prepared from the fly ash obtained from a thermal power plant situated in the southern part of India. The main constituents of the slurry were fly …
Waste Stabilization/Solidification (S/S) Of Eaf Dust Using Fly Ash-Based Geopolymers. Influence Of Carbonation On The Stabilized Solids,
2010
University of Seville, School of Engineering, Chemical and Environmental Engineering Department, Camino de los Descubrimientos s/n 41092, Seville, Spain
Waste Stabilization/Solidification (S/S) Of Eaf Dust Using Fly Ash-Based Geopolymers. Influence Of Carbonation On The Stabilized Solids, Y. Luna Galiano, C. Fernandez Pereira, J. Vale
Coal Combustion and Gasification Products Journal Archive
The effect of the curing in a carbonated ambient of the solids obtained after the stabilization/solidification (S/S) of metallurgical waste using geopolymerization technology is described in this paper. The electric arc furnace (EAF) dust to stabilize contains hazardous metals such as Pb, Cd, Cr, or Zn. Different geopolymeric agents such as potassium hydroxide, potassium silicate, metakaolin, and blast furnace slag have been used. Mixtures of EAF waste with these geopolymeric materials and class F fly ash as main silica and alumina source have been processed. Samples were submitted to an accelerated carbonation test. Compressive strength tests and different leaching tests …
Variations In Fly Ash Composition With Sampling Location: Case Study From A Portuguese Power Plant,
2010
Centro e Departamento de Geologia Faculdade de Cieˆncias da Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal.
Variations In Fly Ash Composition With Sampling Location: Case Study From A Portuguese Power Plant, B. Valentim, A. Guedes, D. Flores, C.R. Ward, J.C. Hower
Coal Combustion and Gasification Products Journal Archive
Fly ash (FA) is a heterogeneous and complex material resulting from coal combustion in thermoelectric power plants (TPP). Therefore, different types of coals, worldwide, produce FAs with different compositions. However, the location of the FA sampling system, inside the TPP, is also important to the composition of the FA produced at each location. A case study of FA from a Portuguese TPP, using several coal and FA characterization techniques (particle size analysis, proximate and ultimate analyses, XRF, SEM/ESEM/EDS, Optical microscopy, XRD, inferred chemistry, and AAS), has shown that FA chemical classification, mineralogy and phase-mineral classification, and trace elements (Cr, Cu, …
Zeolite Synthesised From Fused Coal Fly Ash At Low Temperature Using Seawater For Crystallization,
2010
Laboratory of Environmental and Medical Geology, IMAA–CNR, Tito Scalo (PZ), 85050, Italy
Zeolite Synthesised From Fused Coal Fly Ash At Low Temperature Using Seawater For Crystallization, Claudia Belviso, Francesco Cavalcante, Antonio Lettino, Saverio Fiore
Coal Combustion and Gasification Products Journal Archive
A sample of coal fly ash from an Italian thermoelectric power plant was used in order to synthesize zeolite by hydrothermal activation after a pre-treatment fusion with NaOH. The experiments involved were performed at different temperatures of crystallization, ranging from 35 up to 60uC, with seawater and distilled water, separately, during hydrothermal process. A comparison between the results obtained from the use of the different kinds of water showed that at low temperature (35–40 uC) the synthesis yield of zeolite X is higher using seawater as crystallizing agent than using distilled water. This implies a possible application for seawater in …
Isolation And Characterization Of Bacteria From Extended Aeration Wastewater Treatment Plants.,
2010
Universiti Malaya
Isolation And Characterization Of Bacteria From Extended Aeration Wastewater Treatment Plants., Randy Chin Kok Fei
Student Works (2010-2019)
In this study, three different wastewater treatment plants (STP1, STP2 and STP3) were sampled in Klang Valley. STP1 exhibited the best activated sludge health with healthy Sludge Volume (SV), Mixed Liquor Suspended Solids (MLSS) and Mixed Liquor Volatile Suspended Solids (MLVSS). STP2 were constantly disrupted by the mechanical failures which caused its dissolved oxygen (DO) to decrease whereas STP3 was troubled by the inadequate alkalinity in its mixed liquor causing acidic condition in aeration tank. The acidic condition resulted in pin-floc problem and contributed to high Total Suspended Solids (TSS) and low SV. Influent at STP3 was also found to …
Apartment Living And The Multi-Unit Developments Bill 2009,
2010
Technological University Dublin
Apartment Living And The Multi-Unit Developments Bill 2009, Lorcan Sirr
Articles
No abstract provided.
2010 Nebraska Water Monitoring
Programs Report,
2010
University of Nebraska - Lincoln
2010 Nebraska Water Monitoring Programs Report, Marty Link
Nebraska Department of Environmental Quality: Reports
The Nebraska Department of Environmental Quality (NDEQ) is charged with monitoring, assessing, and to the extent possible, managing the state’s water resources. The purpose of this work is to protect and maintain good quality water and encourage or execute activities to improve poor water quality. Monitoring is done on the over 18,000 miles of flowing rivers and streams, our greater than 280,000 acres of surface water in lakes and reservoirs, and the vast storage of groundwater in Nebraska’s aquifers.
Dual Axis Solar Tracker,
2010
California Polytechnic State University - San Luis Obispo
Dual Axis Solar Tracker, Weston Sapia, Jason Birnie
Electrical Engineering
No abstract provided.
