Search

Your search keyword '"Ward, Colin R."' showing total 11 results
Start Over Author "Ward, Colin R." Publisher elsevier
11 results on '"Ward, Colin R."'

1. List of Contributors

Author

Day, Stuart J., primary, Vapnik, Yevgeny, additional, Sanei, Hamed, additional, Carrie, Jesse, additional, Goodarzi, Fari, additional, Stracher, Glenn B., additional, Kuenzer, Claudia, additional, Hecker, Christoph, additional, Zhang, Jianzhong, additional, Schroeder, Paul A., additional, McCormack, John K., additional, Quintero, Jhon A., additional, Ríos, Carlos A., additional, Klika, Zdenek, additional, Martinec, Petr, additional, Masalehdani, M. Naze-Nancy, additional, Paquette, Yves, additional, de Wit, Frank, additional, Witzke, Thomas, additional, Kolitsch, Uwe, additional, Blaß, Günter, additional, Prakash, Anupma, additional, Gens, Rudiger, additional, Prasad, Sheochandra, additional, Raju, Ashwani, additional, Gupta, Ravi P., additional, Whitehouse, Alfred E., additional, Mulyana, Asep A.S., additional, Vardi, Jacob, additional, Martinelli, Giovanni, additional, Cremonini, Stefano, additional, Samonati, Eleonora, additional, Fishman, Ilia L., additional, Kazakova, Yuliya I., additional, Polyansky, Oleg P., additional, White, Yelena, additional, Bajadilov, Kalik O., additional, Misz-Kennan, Magdalena, additional, Ciesielczuk, Justyna, additional, Tabor, Adam, additional, Ribeiro, Joana, additional, Moura, Rui, additional, Flores, Deolinda, additional, Lopes, Duarte B., additional, Gouveia, Carlos, additional, Mendonça, Sérgio, additional, Frazão, Orlando, additional, Rădan, Sorin-Corneliu, additional, Rădan, Silviu, additional, Sokol, Ellina V., additional, Korzhova, Sophia A., additional, Kokh (Zateeva), Svetlana N., additional, Sharygin, Victor V., additional, Simonova, Ekaterina A., additional, Minayeva, Tatyana, additional, Sirin, Andrey A., additional, Torrance, Keith W., additional, Switzer, Christine, additional, Rein, Guillermo, additional, Carvel, Richard, additional, Hadden, Rory, additional, Belcher, Claire M., additional, Finkelman, Robert B., additional, Pone, Denis, additional, Annegarn, Harold, additional, Blake, Donald R., additional, Moreno, Luis, additional, Jiménez, M. Emilia, additional, Bartley, Russell H., additional, Bartley, Sylvia E., additional, Carroll, Richard E., additional, Lindsley-Griffin, Nancy, additional, Griffin, John R., additional, Heffern, Edward L., additional, Hiett, John K., additional, Hower, James C., additional, Mardon, Sarah M., additional, Bannes (Nolter), Melissa A., additional, Styers, John, additional, Martínez, Manuel, additional, Márquez, Gonzalo, additional, Pone, J. Denis N., additional, McCurdy, Karen M., additional, Rich, Fredrick J., additional, LaFosse’, Lisa, additional, Cummins, Mark, additional, Kim, Ann G., additional, Coates, Donald, additional, Heffern, Edward, additional, Colaizzi, Gary, additional, Taylor, Tammy P., additional, Baughman, Dick, additional, Barnes (Nolter), Melissa A., additional, Vice, Daniel H., additional, van Dijk, Paul, additional, Maathuis, Ben, additional, Zhang, Xiangmin, additional, Voigt, Stefan, additional, Tetzlaf, Anke, additional, Jianzhong, Zhang, additional, Künzer, Claudia, additional, Strunz, Günter, additional, Oertel, Dieter, additional, Roth, Achim, additional, Mehl, Harald, additional, Zhukov, Boris, additional, Jones, Steven, additional, Moolman, Conri, additional, Reid, Alan, additional, Glasser, David, additional, de Andrade, Franco, additional, de Korte, Johan, additional, Falcon, Rosemary, additional, Uludag, Sezar, additional, Ramovha, Sydney, additional, Miller, Dirk, additional, Dhlamini, Eddie, additional, Hiett, John, additional, Finkeman, Robert B., additional, Mathews, Jonathan P., additional, Ncube-Hein, Kim A.A., additional, Emsbo-Mattingly, Stephen D., additional, O’Keefe, Jennifer M.K., additional, Nel, Jan, additional, Peschken, Peter, additional, Rogans, Tom, additional, Sant’Ovaia, Helena, additional, Corrêa-Ribeiro, Heloisa, additional, Gomes, Celeste, additional, Li, Zhongsheng, additional, Ward, Colin R., additional, Oberweis, Brandon, additional, Frankel, Carl, additional, Reiners, Peter, additional, Fleisher, Chris, additional, Kitson, Jimmy, additional, Barwick, Larry H., additional, Naze-Nancy Masalehdani, M., additional, Bouchardon, Jean-Luc, additional, Guy, Bernard, additional, Chalier, Jean, additional, Khesin, Boris, additional, Sonya, Itkis, additional, Shagam, Reginald, additional, Vasterling, Margarete, additional, Schloemer, Stefan, additional, Meyer, Uwe, additional, Fischer, Christian, additional, Ehrler, Christoph, additional, Kokh, Svetlana N., additional, Korzhova, Sofya, additional, Kudinov, Yevgeny, additional, Kiriltseva, Nadezhda, additional, Różański, Zenon, additional, Wrona, Paweł, additional, Drenda, Jan, additional, Pach, Grzegorz, additional, Quang Van, Phan, additional, van Thanh, Tran, additional, Thao, Le Van, additional, Murashko, Mikhail N., additional, Murashko, Zulfiya A., additional, Britvin, Sergey N., additional, Stout, Scott A., additional, Engle, Mark, additional, Olea, Ricardo A., additional, Kolker, Allan, additional, Beck, Jennifer, additional, Palmer, Jana, additional, Benton, Bryan, additional, Chauhan, Ketan, additional, Brantley, William A., additional, Fultz, Allyana, additional, Fultz, Shannon, additional, Hayslip, Joy, additional, Jones, Roy “Chris” C., additional, Martin, Jessica, additional, Waters, Traci, additional, and Thompson, Kimberly, additional

Published
2013
Full Text
View/download PDF

4. Contributing Authors

Author

Crelling, John C., primary, Esterle, Joan S., additional, Finkelman, Robert B., additional, Greb, Stephen F., additional, Mitchell, Gareth D., additional, Pashin, Jack C., additional, Suárez-Ruiz, Isabel, additional, Wagner, Nicola J., additional, Ward, Colin R., additional, Coertzen, M., additional, Matjie, R.H., additional, and van Dyk, J.C., additional

Published
2008
Full Text
View/download PDF

7. Chemical composition and minerals in pyrite ash of an abandoned sulphuric acid production plant

Author

Oliveira, Marcos L.S., Ward, Colin R., Izquierdo, Maria, Sampaio, Carlos H., de Brum, Irineu A.S., Kautzmann, Rubens M., Sabedot, Sydney, Querol, Xavier, Silva, Luis F.O., Oliveira, Marcos L.S., Ward, Colin R., Izquierdo, Maria, Sampaio, Carlos H., de Brum, Irineu A.S., Kautzmann, Rubens M., Sabedot, Sydney, Querol, Xavier, and Silva, Luis F.O.

Abstract

The extraction of sulphur produces a hematite-rich waste, known as roasted pyrite ash, which contains significant amounts of environmentally sensitive elements in variable concentrations and modes of occurrence. Whilst the mineralogy of roasted pyrite ash associated with iron or copper mining has been studied, as this is the main source of sulphur worldwide, the mineralogy, and more importantly, the characterization of submicron, ultrafine and nanoparticles, in coal-derived roasted pyrite ash remain to be resolved. In this work we provide essential data on the chemical composition and nanomineralogical assemblage of roasted pyrite ash. XRD, HR-TEM and FE-SEM were used to identify a large variety of minerals of anthropogenic origin. These phases result from highly complex chemical reactions occurring during the processing of coal pyrite of southern Brazil for sulphur extraction and further manufacture of sulphuric acid. Iron-rich submicron, ultrafine and nanoparticles within the ash may contain high proportions of toxic elements such as As, Se, U, among others. A number of elements, such as As, Cr, Cu, Co, La, Mn, Ni, Pb, Sb, Se, Sr, Ti, Zn, and Zr, were found to be present in individual nanoparticles and submicron, ultrafine and nanominerals (e.g. oxides, sulphates, clays) in concentrations of up to 5%. The study of nanominerals in roasted pyrite ash from coal rejects is important to develop an understanding on the nature of this by-product, and to assess the interaction between emitted nanominerals, ultra-fine particles, and atmospheric gases, rain or body fluids, and thus to evaluate the environmental and health impacts of pyrite ash materials.

Published
2012

8. Environmental evaluation and nano-mineralogical study of fresh and unsaturated weathered coal fly ashes.

Author

Akinyemi SA, Gitari WM, Petrik LF, Nyakuma BB, Hower JC, Ward CR, Oliveira MLS, and Silva LFO

Abstract

Coal combustion and the disposal of combustion wastes emit enormous quantities of nano-sized particles that pose significant health concerns on exposure, particularly in unindustrialized countries. Samples of fresh and weathered class F fly ash were analysed through various techniques including X-ray fluorescence (XRF), X-ray diffraction (XRD), focused ion beam scanning electron microscopy (FIB-SEM), field-emission gun scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM) coupled with energy dispersive x-ray spectroscopy (EDS), and Raman Spectroscopy. The imaging techniques showed that the fresh and weathered coal fly ash nanoparticles (CFA-NPs) are mostly spherical shaped. The crystalline phases detected were quartz, mullite, ettringite, calcite, maghemite, hematite, gypsum, magnetite, clay residues, and sulphides. The most abundant crystalline phases were quartz mixed with Al-Fe-Si-K-Ti-O-amorphous phases whereas mullite was detected in several amorphous phases of Al, Fe, Ca, Si, O, K, Mg, Mn, and P. The analyses revealed that CFA-NPs are 5-500 nm in diameter and encapsulate several potentially hazardous elements (PHEs). The carbon species were detected as 5-50 nm carbon nanoballs of graphitic layers and massive fullerenes. Lastly, the aspects of health risks related to exposure to some detected ambient nanoparticles are also discussed., (Copyright © 2019. Published by Elsevier B.V.)

Published
2019
Full Text
View/download PDF

9. Chemical composition and minerals in pyrite ash of an abandoned sulphuric acid production plant.

Author

Oliveira ML, Ward CR, Izquierdo M, Sampaio CH, de Brum IA, Kautzmann RM, Sabedot S, Querol X, and Silva LF

Subjects
Brazil, Environmental Monitoring, Ferric Compounds analysis, Iron chemistry, Microscopy, Electron, Scanning, Microscopy, Electron, Transmission, Particle Size, Sulfides chemistry, Sulfuric Acids chemistry, Coal Ash analysis, Environmental Pollutants analysis, Minerals analysis, Nanoparticles analysis, Particulate Matter analysis
Abstract

The extraction of sulphur produces a hematite-rich waste, known as roasted pyrite ash, which contains significant amounts of environmentally sensitive elements in variable concentrations and modes of occurrence. Whilst the mineralogy of roasted pyrite ash associated with iron or copper mining has been studied, as this is the main source of sulphur worldwide, the mineralogy, and more importantly, the characterization of submicron, ultrafine and nanoparticles, in coal-derived roasted pyrite ash remain to be resolved. In this work we provide essential data on the chemical composition and nanomineralogical assemblage of roasted pyrite ash. XRD, HR-TEM and FE-SEM were used to identify a large variety of minerals of anthropogenic origin. These phases result from highly complex chemical reactions occurring during the processing of coal pyrite of southern Brazil for sulphur extraction and further manufacture of sulphuric acid. Iron-rich submicron, ultrafine and nanoparticles within the ash may contain high proportions of toxic elements such as As, Se, U, among others. A number of elements, such as As, Cr, Cu, Co, La, Mn, Ni, Pb, Sb, Se, Sr, Ti, Zn, and Zr, were found to be present in individual nanoparticles and submicron, ultrafine and nanominerals (e.g. oxides, sulphates, clays) in concentrations of up to 5%. The study of nanominerals in roasted pyrite ash from coal rejects is important to develop an understanding on the nature of this by-product, and to assess the interaction between emitted nanominerals, ultra-fine particles, and atmospheric gases, rain or body fluids, and thus to evaluate the environmental and health impacts of pyrite ash materials., (Copyright © 2012 Elsevier B.V. All rights reserved.)

Published
2012
Full Text
View/download PDF

10. Identification of nanominerals and nanoparticles in burning coal waste piles from Portugal.

Author

Ribeiro J, Flores D, Ward CR, and Silva LF

Subjects
Environmental Monitoring, Microscopy, Electron, Scanning, Microscopy, Electron, Transmission, Nanoparticles ultrastructure, Particle Size, Portugal, Spectrometry, X-Ray Emission, Carbon analysis, Coal analysis, Minerals analysis, Nanoparticles analysis, Waste Products analysis
Abstract

A range of carbon nanoparticles, agglomerates and mineral phases have been identified in burning coal waste pile materials from the Douro Coalfield of Portugal, as a basis for identifying their potential environmental and human health impacts. The fragile nature and fine particle size of these materials required novel characterization methods, including energy-dispersive X-ray spectrometry (EDS), field-emission scanning electron microscope (FE-SEM), and high-resolution transmission electron microscopy (HR-TEM) techniques. The chemical composition and possible correlations with morphology of the nanominerals and associated ultra-fine particles have been evaluated in the context of human health exposure, as well as in relation to management of such components in coal-fire environments., (Copyright © 2010 Elsevier B.V. All rights reserved.)

Published
2010
Full Text
View/download PDF

11. Quantitative evaluation of minerals in fly ashes of biomass, coal and biomass-coal mixture derived from circulating fluidised bed combustion technology.

Author

Koukouzas N, Ward CR, Papanikolaou D, Li Z, and Ketikidis C

Subjects
Biomass, Coal Ash, Oxides, Pilot Projects, Quartz, Carbon analysis, Coal analysis, Minerals analysis, Particulate Matter analysis
Abstract

The chemical and mineralogical composition of fly ash samples collected from laboratory scale circulating fluidised bed (CFB) combustion facility have been investigated. Three fly ashes were collected from the second cyclone in a 50 kW laboratory scale boiler, after the combustion of different solid fuels. Characterisation of the fly ash samples was conducted by means of X-ray fluorescence (XRF), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Quantitative analysis of the crystalline (mineral) and amorphous phases in each ash sample was carried out using the Rietveld-based Siroquant system, with an added spike of ZnO to evaluate the amorphous content. SiO(2) is the dominant oxide in the fly ashes, with CaO, Al(2)O(3) and Fe(2)O(3) also present in significant proportions. XRD results show that all three fly ashes contain quartz, anhydrite, hematite, illite and amorphous phases. The minerals calcite, feldspar, lime and periclase are present in ashes derived from Polish coal and/or woodchips. Ash from FBC combustion of a Greek lignite contains abundant illite, whereas illite is present only in minor proportions in the other ash samples.

Published
2009
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results