Physical Sciences and Mathematics Commons^™

Fabrication Of Hierarchically One-Dimensional Znxcd1-Xs/Nitio3 Nanostructures And Their Enhanced Photocatalytic Water Splitting Activity, Ling Wang, Guorui Yang, Silan Wang, Jianan Wang, Muhammad Salman Nasir, Caiyun Wang, Shengjie Peng, Wei Yan, Seeram Ramakrishna

Australian Institute for Innovative Materials - Papers

Hierarchically one-dimensional nanomaterials represent a kind of promising catalyst for photocatalytic of hydrogen generation, where the photoinduced charge carriers can effectively separate and be engaged in the target reaction. Herein, we report the synthesis of hierarchically one-dimensional ZnxCd1-xS/NiTiO3 nanofibers and the investigations of their photocatalytic performance. These well-designed nanofibers demonstrate a typically one-dimensional heterostructure with an excellent continuity, and the element mapping, X-ray diffraction, and X-ray photoelectron spectroscopy collectively confirm the ZnxCd1-xS nanoparticles being decorated on the surface of NiTiO3 nanofibers successfully. The ZnxCd1-xS/NiTiO3 nanofibers exhibit enhanced efficiency in photocatalytic hydrogen production under visible light, compared with the ZnxCd1-xS/TiO2 nanofibers. …

Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen And Hydrogen Evolution From Water In A Photoelectrochemical Concentration Cell (Pecc), Mohammed Alsultan, Khalid Zainulabdeen, Pawel W. Wagner, Gerhard F. Swiegers, Holly Warren

Australian Institute for Innovative Materials - Papers

Light-driven water-splitting to generate hydrogen and oxygen from water is typically carried out in an electrochemical cell with an external voltage greater than 1.23 V applied between the electrodes. In this work, we examined the use of a concentration/chemical bias as a means of facilitating water-splitting under light illumination without the need for such an externally applied voltage. Such a concentration bias was created by employing a pH differential in the liquid electrolytes within the O2-generating anode half-cell and the H2-generating cathode half-cell. A novel, stretchable, highly ion-conductive polyacrylamide CsCl hydrogel was developed to connect the two half-cells. The key …

General Π-Electron-Assisted Strategy For Single-Atom (Ir, Pt, Ru, Pd, Fe, And Ni) Electrocatalysts With Bi-Functional Active Sites Toward Highly Efficient Water Splitting, Weihong Lai, Li-Fu Zhang, Wei-Bo Hua, Sylvio Indris, Zichao Yan, Zhe Hu, Binwei Zhang, Yani Liu, Li Wang, Min Liu, Rong Liu, Yunxiao Wang, Jiazhao Wang, Zhenpeng Hu, Hua-Kun Liu, Shulei Chou, Shi Xue Dou

Australian Institute for Innovative Materials - Papers

Both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) are crucial to water splitting, but require alternative active sites. Now, a general pelectron- assisted strategy to anchor single-atom sites (M=Ir, Pt, Ru, Pd, Fe, Ni) on a heterogeneous support is reported. The Matoms can simultaneously anchor on two distinct domains of the hybrid support, four-fold N/C atoms (M@NC), and centers of Co octahedra (M@Co), which are expected to serve as bifunctional electrocatalysts towards the HER and the OER. The Ir catalyst exhibits the best water-splitting performance, showing a low applied potential of 1.603V to achieve 10 mAcm@2 …

Electrocatalytically Inactive Sns2 Promotes Water Adsorption/Dissociation On Molybdenum Dichalcogenides For Accelerated Alkaline Hydrogen Evolution, Yaping Chen, Xingyong Wang, Mengmeng Lao, Kun Rui, Xiaobo Zheng, Haibo Yu, Jing Ma, Shi Xue Dou, Wenping Sun

Australian Institute for Innovative Materials - Papers

Molybdenum dichalcogenides, in particular, MoS2 and MoSe2, are very promising nonprecious metal-based electrocatalysts for hydrogen evolution reaction (HER) in acidic media. They exhibit inferior alkaline HER activity, however, due to the sluggish water dissociation process. Here, we design and synthesize new molybdenum dichalcogenide-based heterostructures with the basal planes decorated with SnS2 quantum dots towards enhanced alkaline HER activity. The electrochemical results reveal that the alkaline hydrogen evolution kinetics of molybdenum dichalcogenides is substantially accelerated after incorporation of SnS2 quantum dots. The optimal MoSe2/SnS2 heterostructure delivers a much lower overpotential of 285 mV than MoSe2 (367 mV) to reach a current …

Effect Of Storage Environment On Hydrogen Generation By The Reaction Of Al With Water, Yin-Qiang Wang, Wei-Zhuo Gai, Xia-Yu Zhang, Hong-Yi Pan, Zhenxiang Cheng, Pingguang Xu, Zhen-Yan Deng

Australian Institute for Innovative Materials - Papers

Al powder was stored in saturated water vapor, oxygen, nitrogen and drying air separately for a time period of up to six months, the degradation behavior of Al activity was characterized by the reaction of Al with water. It was found that water vapor decreased the induction time for the beginning of Al-water reaction and reduced the total hydrogen generation per unit weight of Al, while oxygen increased the induction time and retarded the Al-water reaction. In contrast, the effect of nitrogen and drying air on Al activity was weak. The mechanism analyses indicated that water vapor promoted the hydration …

Aqueous Electrosynthesis Of An Electrochromic Material Based Water-Soluble Edot-Menh2 Hydrochloride, Hui Sun, Long Zhang, Liqi Dong, Xiaofei Zhu, Shouli Ming, Youshan Zhang, Huakun Xing, Xuemin Duan, Jingkun Xu

Australian Institute for Innovative Materials - Papers

2'-Aminomethyl-3,4-ethylenedioxythiophene (EDOT-MeNH2) showed unsatisfactory results when its polymerization occurred in organic solvent in our previous report. Therefore, a water-soluble EDOT derivative was designed by using hydrochloric modified EDOT-MeNH2 (EDOT-MeNH2·HCl) and electropolymerized in aqueous solution to form the corresponding polymer with excellent electrochromic properties. Moreover, the polymer was systematically explored, including electrochemical, optical properties and structure characterization. Cyclic voltammetry showed low oxidation potential of EDOT-MeNH2·HCl (0.85 V) in aqueous solution, leading to the facile electrodeposition of uniform the polymer film with outstanding electroactivity. Compared with poly(2′-aminomethyl- 3,4-ethylenedioxythiophene) (PEDOT-MeNH2), poly(2′-aminomethyl-3,4-ethylenedioxythiophene salt) (PEDOT-MeNH3 +A-) revealed higher efficiencies (156 cm2 C-1), lower bandgap (1.68 …

Size-Dependent Chemical Reactivity Of Silicon Nanocrystals With Water And Oxygen, Melanie L. Mastronardi, Kenneth K. Chen, Kristine Liao, Gilberto Casillas, Geoffrey A. Ozin

Australian Institute for Innovative Materials - Papers

A detailed investigation examines how the size of allylbenzene-capped silicon nanocrystals (ncSi:AB) affects their chemical reactivity with gaseous O₂, H₂O, and O₂/H₂O as probed by in situ luminescence spectroscopy. Specifically, changes in the photoluminescence (PL) of size-separated ncSi:AB are monitored through alterations of their PL absolute quantum yield (AQY) as well as the wavelength and intensity of their PL spectra over time. These experiments, conducted under both continuous and intermittent illumination, help elucidate the roles of O₂, H₂O, and mixtures of O₂/H₂O, with respect …

Electronic Structure And Photocatalytic Water Oxidation Activity Of Rtino2 (R = Ce, Pr And Nd) Perovskite Nitride Oxides, Spencer H. Porter, Zhenguo Huang, S X. Dou, Samantha Brown-Xu, Md. Golam Mahabub Sarwar, Roberto C. Myers, Patrick M. Woodward

Australian Institute for Innovative Materials - Papers

Three perovskite nitride oxides CeTiNO₂, PrTiNO₂, and NdTiNO₂ have been synthesized and their electronic structures and photocatalytic activities characterized and compared to LaTiNO₂. All three compounds have band gaps that fall in the range 2.0 − 2.1 eV, very similar to LaTiNO₂, which enables them to absorb a significant fraction of the visible spectrum. Photocatalytic oxygen evolution studies under visible light irradiation in the presence of a sacrificial electron acceptor (Ag⁺) show that the activity of NdTiNO₂ (16 μmol/g/hr) is comparable to that of LaTiNO₂ (17 μmol/g/hr), …

Hierarchical Heteroaggregation Of Binary Metal-Organic Gels With Tunable Porosity And Mixed Valence Metal Sites For Removal Of Dyes In Water, Asif Mahmood, Wei Xia, Nasir Mahmood, Qingfei Wang, Ruqiang Zou

Australian Institute for Innovative Materials - Papers

Hierarchical heteronuclear metal-organic gels (MOGs) based on iron (Fe) and aluminium (Al) metal-organic framework (MOF) backbones bridged by tri-carboxylate ligands have firstly been synthesized by simple solvothermal method. Monometallic MOGs based on Fe or Al give homogenous monoliths, which have been tuned by introduction of heterogeneity in the system (mismatched growth). The developed gels demonstrate that surface areas, pore volumes and pore sizes can be readily tuned by optimizing heterogeneity. The work also elaborates effect of heterogeneity on size of MOG particles which increase substantially with increasing heterogeneity as well as obtaining mixed valence sites in the gels. High surface …

A Light-Assisted, Polymeric Water Oxidation Catalyst That Selectively Oxidizes Seawater With A Low Onset Potential, Jun Chen, Pawel W. Wagner, Lei Tong, Danijel Boskovic, Weimin Zhang, David L. Officer, Gordon G. Wallace, Gerhard F. Swiegers

Australian Institute for Innovative Materials - Papers

Vapour phase polymerisation (vpp) of PEDOT to incorporate high levels of a sulphonated manganese porphyrin yields a vivid green conducting polymer that, under illumination, catalyzes selective oxidation of water from seawater from ca. 0.40 V (vs. NHE; Pt counter electrode) without observable chlorine formation. This onset potential is comparable to that of certain metal oxide semiconductors that achieve higher photocurrents but are not capable of selectively oxidising the water in seawater.

Highly Water-Soluble Magnetic Iron Oxide (Fe3o4) Nanoparticles For Drug Delivery: Enhanced In Vitro Therapeutic Efficacy Of Doxorubicin And Mion Conjugates, Muhammad Irfan Majeed, Qunwei Lu, Wei Yan, Zhen Li, Irshad Hussain, Muhammad Nawaz Tahir, Wolfgang Tremel, Bien Tan

Australian Institute for Innovative Materials - Papers

We report a simple one step protocol for the preparation of fairly monodisperse and highly water-soluble magnetic iron oxide nanoparticles (MIONs) through a co-precipitation method using a novel multifunctional, biocompatible and water-soluble polymer ligand dodecanethiol-polymethacrylic acid (DDT-PMAA). DDT-PMAA owing to its several intrinsic properties, not only efficiently controls the size of the MIONs but also gives them excellent water solubility, long time stability against aggregation and oxidation, biocompatibility and multifunctional surface rich in thioether and carboxylic acid groups. The molecular weight and concentration of the polymer ligand were optimized to produce ultrasmall (4.6 +/- 0.7 nm) MIONs with high magnetization …

Collective Librations Of Water Molecules In The Crystal Lattice Of Rubidium Bromide: Experiment And Simulation, L M. Lepodise, J Horvat, Roger A. Lewis

Australian Institute for Innovative Materials - Papers

Terahertz spectroscopy of RbBr reveals four prominent absorption lines at room temperature and a further 15 lines at 10 K. Via density-functional-theory (DFT) numerical modelling using the PBE0 hybrid GGA functional, all the absorptions are identified as correlated librations of water molecules in the RbBr lattice. Each libration mode is a combination of rocking, wagging and twisting motions of the water molecules. The number of libration lines and numerical modelling show that the C2v symmetry of water in RbBr is broken. Our modelling shows that the distribution of libration amplitudes and phases for different water molecules in the RbBr unit …

Process-Evaluation Of Tropospheric Humidity Simulated By General Circulation Models Using Water Vapor Isotopologues: 1. Comparison Between Models And Observations, Camille Risi, David Noone, John Worden, Christian Frankenberg, Gabriele Stiller, Michael Kiefer, Bernd Funke, Kaley Walker, Peter Bernath, Matthias Schneider, Debra Wunch, Vanessa Sherlock, Nicholas M. Deutscher, David W. Griffith, Paul O. Wennberg, Kimberly Strong, Dan Smale, Emmanuel Mahieu, Sabine Barthlott, Frank Hase, Omar Garcia, Justus Notholt, Thorsten Warneke, Geoffrey Toon, David Sayres, Sandrine Bony, Jeonghoon Lee, Derek Brown, Ryu Uemura, Christophe Sturm

Faculty of Science - Papers (Archive)

[1] The goal of this study is to determine how H2O and HDO measurements in water vapor can be used to detect and diagnose biases in the representation of processes controlling tropospheric humidity in atmospheric general circulation models (GCMs). We analyze a large number of isotopic data sets (four satellite, sixteen ground-based remote-sensing, five surface in situ and three aircraft data sets) that are sensitive to different altitudes throughout the free troposphere. Despite significant differences between data sets, we identify some observed HDO/H2O characteristics that are robust across data sets and that can be used to evaluate models. We evaluate …

Are Competitive Effects Of Native Species On An Invader Mediated By Water Availability?, Tanya J. Mason, Kristine French, Ken Russell

Faculty of Science - Papers (Archive)

Question: Climate change processes could influence the dynamics of biotic interactions such as plant competition, especially in response to disturbance phenomena such as invasional processes. Are competitive effects of native species on an invadermediated bywater availability?

Location: Glasshouse facility, New SouthWales, Australia.

Methods: We constructed competitive hierarchies for a representative suite of species from coastal dune communities that have been invaded by the Asteraceae shrub, bitou (Chrysanthemoides monilifera subsp. rotundata). We used a comparative phytometer approach, where the invader species was grown with or without a suite of native species in glasshouse trials. This was used to construct competition hierarchies …

Synthesis, Properties And Water Permeability Of Swnt Buckypapers, L J. Sweetman, L Nghiem, I Chironi, G Triani, Marc In Het Panhuis, St F. Ralph

Faculty of Science - Papers (Archive)

The ability of macrocyclic ligands to facilitate formation of dispersions of single-walled carbon nanotubes (SWNTs) was investigated using a combination of absorption spectrophotometry and optical microscopy. Vacuum filtration of aqueous dispersions containing SWNTs and various macrocyclic ligands (derivatised porphyrin, phthalocyanine, cyclodextrin and calixarene) afforded self-supporting membranes known as buckypapers. Microanalytical data and energy dispersive X-ray spectra were obtained for these buckypapers and provided evidence for retention of the macrocyclic ligands within the structure of the membranes. The electrical conductivities of the membranes varied between 30 ± 20 and 220 ± 60 S cm−1, while contact angle analysis revealed they all …

Nanoscale Condensation Of Water On Self-Assembled Monolayers, Michael James, Tamim A. Darwish, Simone Ciampi, Sven O. Sylvester, Zhaoming Zhang, Albert Ng, J Justin Gooding, Tracey L. Hanley

Australian Institute for Innovative Materials - Papers

We demonstrate that water is almost universally present on apparently dry self-assembled monolayers, even on those considered almost hydrophobic by conventional methods such as water contact goniometry. The structure and kinetics of nanoscale water adsorption onto these surfaces were investigated using X-ray and neutron reflectometry, as well as atomic force microscopy. Condensation of water on hydrophilic surfaces under ambient conditions formed a dense sub-nanometre surface layer; the thickness of which increased with exponentially limiting kinetics. Tapping mode AFM measurements show the presence of nanosized droplets that covered a small percentage (∼2%) of the total surface area, and which became fewer …

How Well Do Predators Adjust To Climate-Mediated Shifts In Prey Distribution? A Study On Australian Water Pythons, Beata Ujvari, Rick Shine, Thomas Madsen

Faculty of Science - Papers (Archive)

Climate change can move the spatial location of resources critical for population viability, and a species resilience to such changes will depend upon its ability to flexibly shift its activities away from no-longer-suitable sites to exploit new opportunities. Intuition suggests that vagile predators should be able to track spatial shifts in prey availability, but our data on water pythons (Liasis fuscus) in tropical Australia suggest a less encouraging scenario. These pythons undergo regular long-range (to .10 km) seasonal migrations to follow flooding-induced migrations by their prey (native dusky rats, Rattus colletti ). However, when an extreme flooding event virtually eliminated …

Specific Cellular Water Dynamics Observed In Vivo By Neutron Scattering And Nmr., Moeava Tehei, Marion Jasnin, Andreas Stadler, Giuseppe Zaccai

Faculty of Science - Papers (Archive)

Neutron scattering, by using deuterium labelling, revealed how intracellular water dynamics, measured in vivo in E. coli, human red blood cells and the extreme halophile, Haloarcula marismortui, depends on the cell type and nature of the cytoplasm. The method uniquely permits the determination of motions on the molecular length (Ba˚ ngstrøm) and time (pico- to nanosecond) scales. In the bacterial and human cells, intracellular water beyond the hydration shells of cytoplasmic macromolecules and membrane faces flows as freely as liquid water. It is not ‘‘tamed’’ by confinement. In contrast, in the extreme halophile archaeon, in addition to free and hydration …

Catalytic Solar Water Splitting Inspired By Photosynthesis. Homogeneous Catalysts With A Mechanical ("Machine-Like") Action, Gerhard F. Swiegers, G Charles Dismukes, Leone Spiccia, Robin Brimblecombe, Annette Koo, Jun Chen, Gordon G. Wallace

Faculty of Science - Papers (Archive)

Chemical reactions may be controlled by either: the minimum threshold energy that must be overcome during collisions between reactant molecules / atoms (the Activation Energy, Ea), or: the rate at which reactant collisions occur (the Collision Frequency, A) (for reactions with low Ea). Reactions of type (2) are governed by the physical, mechanical interaction of the reactants. Such mechanical processes are unusual, but not unknown in molecular catalysts. We examine the catalytic action and macroscopic properties of several abiological mechanical catalysts and show that they display distinct similarities to enzymes in general. An abiological model of the Photosystem II Water …

Book Review: "Troubled Waters: Confronting The Water Crisis In Australia's Cities" By Patrick Troy (Ed.), Leah M. Gibbs

Faculty of Science - Papers (Archive)

Troubled Waters is a collection of essays edited by Patrick Troy, Emeritus Professor and Visiting Fellow at the Fenner School of Environment and Society, Australian National University. The papers are contributed by a multidisciplinary group of authors, from the fields of economics, history, geography, environmental and social policy and law. As a result, the book does not present a single theoretical or methodological approach and in this regard it is refreshing. The book is published by the ANU E Press; a publisher that makes academic output from the ANU freely available from its website, as well as for purchase through …

Just Add Water: Colonisation, Water Governance, And The Australian Inland, Leah Maree Gibbs

Faculty of Science - Papers (Archive)

Water has played a key role in the development of the Australian inland and the nation. For European colonists, the dry and variable landscape challenged ideas about nature imported from northern temperate regions. I argue first, that colonists brought with them ideas for ordering nature and tools for transforming landscapes that led to inappropriate and destructive water management and the silencing of local voices and knowledge systems. Secondly, colonial patterns of ordering and transforming landscapes are ongoing, but new ways of governing water, which challenge colonialism, are emerging. In the first section of the paper I discuss colonial relationships with …

A Bio-Inspired Molecular Catalyst That Selectively Catalyzes Water Oxidation In Seawater, Without Significant Chlorine Formation, Robin Brimblecombe, G. Charles Dismukes, Gerhard F. Swiegers, Leone Spiccia

Faculty of Science - Papers (Archive)

Most transport fuels are derived from fossil fuels, generate greenhouse gases, and consume significant amounts of water in the extraction, purification, and/or burning processes. The generation of hydrogen using solar energy to split water, ideally from sea water or other non-potable sources, could potentially provide an unlimited, clean fuel for the future. Solar, electrochemical water splitting typically combines a photoanode at which water oxidation occurs, with a cathode for proton reduction to hydrogen. In recent work we have found that a bioinspired tetra-manganese cluster catalyzes water oxidation at relatively low overpotentials (0.38 V) when doped into a Nafion proton conduction …

Molecular Water Oxidation Catalysts For Photoelectrochemical Cells, Robin Brimblecombe, Charles Dismukes, Gerhard F. Swiegers, Leone Spiccia

Faculty of Science - Papers (Archive)

Photoelectrochemical cells that efficiently split water into oxygen and hydrogen, "the fuel of the future", need to combine robust water oxidation catalysts at the anode (2H(2)O -> O-2 + 4H(+) + 4e(-)) with hydrogen reduction catalysts at the cathode (2H(+) + 2e(-) -> H-2). Both sets of catalysts will, ideally, operate at low overpotentials and employ light-driven or light-assisted processes. In this Perspective article, we focus on significant efforts to develop solid state materials and molecular coordination complexes as catalyst for water oxidation. We briefly review the field with emphasis on the various molecular catalysts that have been developed and …

Spatial Ecology Of Hatchling Water Pythons (Liasis Fuscus) In Tropical Australia, Richard Shine, Thomas R. Madsen, Ligia Pizzatto, Gregory P. Brown

Faculty of Science - Papers (Archive)

Young snakes are rarely seen in the field and little is known about their habits. mostly because they are too small for radio-telemetry (the primary method for Studying snake spatial ecology). However, the offspring or some larger species can be fitted with transmitters and we investigated the spatial ecology and habitat use of ten hatchling water pythons (Liasis fuscus: Pythonidae) in the floodplain of the Adelaide River, tropical Australia. Patterns of habitat use in the late wet season and during the dry season were similar to those of adults tracked in the same vicinity in an earlier study. Soon after …

A Bio-Inspired Molecular Water Oxidation Catalyst For Renewable Hydrogen Generation: An Examination Of Salt Effects, Robin Brimblecombe, Miriam Rotstein, Annette Koo, G Charles Dismukes, Gerhard F. Swiegers, Leone Spiccia

Faculty of Science - Papers (Archive)

Most transport fuels are derived from fossil fuels, generate greenhouse gases, and consume significant amounts of water in the extraction, purification, and/or burning processes. The generation of hydrogen using solar energy to split water, ideally from abundant water sources such as sea water or other non-potable sources, could potentially provide an unlimited, clean fuel for the future. Solar, electrochemical water splitting typically combines a photoanode at which water oxidation occurs, with a cathode for proton reduction to hydrogen. In recent work, we have found that a bioinspired tetra-manganese cluster catalyzes water oxidation at relatively low overpotentials (0.38 V) when doped …

Development And Application Of A System For The Analysis Of Atmospheric, Water And Sediment Nitrogen And Carbon, Ann Stavert, Stephen R. Wilson, Dianne F. Jolley

Faculty of Science - Papers (Archive)

Eutrophication and climate change, key environmental concerns, are both linked to the carbon and nitrogen cycles hence the improved understanding of these cycles is essential. Currently, there is no system that simultaneously measures the fluxes of the three key gas phase products of nitrogen and carbon cycling (CO2, CH4 and N2O) in submerged ecosystems with hourly time resolution. A “Lake-in-a-box” (mesocosm) was developed in the laboratory which allowed the monitoring of key components of the carbon and nitrogen cycles within the air, water and sediments. The approach is automated, simple and time efficient and novel in its ability to examine …

Safe Water For People In Low, Small Island Pacific Nations: The Rural-Urban Dilemma, Ian White, Tony Falkland, Taboia Metutera, Mourongo Katatia, Tererei Abete-Reema, Marc Overmars, Pascal Perez, Anne Dray

SMART Infrastructure Facility - Papers

The issue of ensuring that growing communities in small island countries have access to safe water and adequate sanitation is examined in Kiribati, whose islands are spread over three million square kilometres in the central Pacific. Its coral island communities have water supply and sanitation problems among the most difficult in the world. Formulaic developed-world approaches, models, techniques and toolboxes that do not consider the social and cultural context have had little success. Changes in approach at the international, national and local levels are called for, and the resourcing of village-level water and sanitation committees would return ownership and control …

Water Quality In The Wingecarribee Shire, Nsw, Glennys A. O'Brien, Mark R. O'Donnell, Adrian C. Hutton

Faculty of Science - Papers (Archive)

This paper reports on a water quality monitoring program carried out for Wingecarribee Shire Council between March 2002 and July 2004 by University of Wollongong staff and students. Initially 40 sites were sampled on four occasions over three months in a pilot program leading to the selection of sites and parameters for a two year program of monthly monitoring. A range of chemical, physical and biological parameters was measured including nutrients and faecal coliform bacteria on samples collected over the 26 approximately monthly sampling trips. Chlorophyll a, phaeophyton and blue-green algae were also determined over a shorter period. The sampling …

Water Quality Assessment - Issues From A Laboratory Management Perspective, Robert John Morrison, Mark R. O'Donnell, D. Springer

Faculty of Science - Papers (Archive)

This paper considers issues relating to the measurement of water quality parameters in the laboratory, especially an external (usually commercial) laboratory. Many organisations now use testing laboratories for water quality measurements, a process that has advantages and some limitations. The interaction between the testing laboratory and the organization requiring the data is crucial, and this paper looks at some aspects where a full appreciation of the role of each partner is important. These include limits of detection and reporting, measurement uncertainty, sample storage and preservation times, and various quality control procedures.

Water Quality In The Illawarra-South Coast Region Of New South Wales, Australia, Robert John Morrison, Mark R. O'Donnell

Faculty of Science - Papers (Archive)

Water quality is a serious environmental concern in the South Coast region of New South Wales as many aspects of human ecology and the economy are dependant on good water quality. Apart from drinking water for residents and visitors, tourism and agricultural productivity rely on good quality water. This paper presents an overview of general issues with regard to the development of water quality assessment procedures and programs, and discusses a number of issues considered important for the region. These include the impacts of increasing urbanisation, industrial activity (including mining), the potential wider use of groundwater and the improved management …