G
Gary G. Leppard
Researcher at National Water Research Institute
Publications - 70
Citations - 6258
Gary G. Leppard is an academic researcher from National Water Research Institute. The author has contributed to research in topics: Transmission electron microscopy & Activated sludge. The author has an hindex of 36, co-authored 70 publications receiving 5992 citations. Previous affiliations of Gary G. Leppard include McMaster University & Lawrence Berkeley National Laboratory.
Papers
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Journal ArticleDOI
Surface properties of sludge and their role in bioflocculation and settleability
Bao-Qiang Liao,D.G. Allen,Ian G. Droppo,Gary G. Leppard,Gary G. Leppard,Steven N. Liss,Steven N. Liss +6 more
TL;DR: The results indicate that it is the surface properties, hydrophobicity, surface charge and composition of EPS, of sludge, rather than the quantity of EPS that govern bioflocculation, and in contrast, the EPS content is more important in controlling the settleability of sludges.
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Characterizing Manufactured Nanoparticles in the Environment: Multimethod Determination of Particle Sizes
Rute F. Domingos,Mohamed Baalousha,Yon Ju-Nam,M Marcia Reid,Nathalie Tufenkji,Jamie R. Lead,Gary G. Leppard,Kevin J. Wilkinson +7 more
TL;DR: No "ideal" technique was found for characterizing manufactured nanoparticles in an environmental context as each technique had its own advantages and limitations.
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Metal sorption to diagenetic iron and manganese oxyhydroxides and associated organic matter: Narrowing the gap between field and laboratory measurements
TL;DR: In this paper, X-ray diffraction and electron microscopic analyses indicated that the Fe-rich material collected was predominantly ferrihydrite and poorly crystallized lepidocrocite, while the Mn-rich mixture was a mixture of poorly crystallised Mn oxyhydroxides.
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Scanning Transmission X-Ray, Laser Scanning, and Transmission Electron Microscopy Mapping of the Exopolymeric Matrix of Microbial Biofilms
John R. Lawrence,George D. W. Swerhone,Gary G. Leppard,Tohru Araki,Xuerong Zhang,M. Marcia West,Adam P. Hitchcock +6 more
TL;DR: This combination of multimicroscopy analysis can be used to create a detailed correlative map of biofilm structure and composition and to improve the understanding of the biochemical basis for biofilm organization.
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Soft X-ray Microscopy and Spectroscopy at the Molecular Environmental Science Beamline at the Advanced Light Source
Hendrik Bluhm,Klas Andersson,Klas Andersson,Tohru Araki,Karim Benzerara,Gordon E. Brown,James J. Dynes,Sutapa Ghosal,Sutapa Ghosal,Mary K. Gilles,H.-Ch. Hansen,John C. Hemminger,Adam P. Hitchcock,Guido Ketteler,A. L. D. Kilcoyne,E. Kneedler,John R. Lawrence,Gary G. Leppard,J. Majzlam,Bongjin Simon Mun,Satish Chandra Babu Myneni,Anders Nilsson,Anders Nilsson,Hirohito Ogasawara,D.F. Ogletree,K. Pecher,Miquel Salmeron,David K. Shuh,Brian P. Tonner,Tolek Tyliszczak,Tony Warwick,Tae Hyun Yoon +31 more
TL;DR: In this paper, the application of synchrotron-based spectroscopies and microscopies to environmentally relevant samples is presented. But the experiments were performed at the molecular environmental science beamline (11.0.2) at the Advanced Light Source, Lawrence Berkeley National Laboratory.