A5022902565- Heavy metals in environment
- Mine drainage and remediation techniques
- Mercury impact and mitigation studies
- Environmental Toxicology and Ecotoxicology
- Water Quality and Pollution Assessment
- Analytical chemistry methods development
- Metal Extraction and Bioleaching
- Electrochemical Analysis and Applications
- Geochemistry and Elemental Analysis
- Nanoparticles: synthesis and applications
- Arsenic contamination and mitigation
- Aquatic Ecosystems and Phytoplankton Dynamics
- Water Quality Monitoring and Analysis
- Microplastics and Plastic Pollution
- Atmospheric and Environmental Gas Dynamics
- Mining and Resource Management
- Water Quality Monitoring Technologies
- Groundwater flow and contamination studies
- Marine animal studies overview
- Fecal contamination and water quality
- Radioactive element chemistry and processing
- Marine Biology and Environmental Chemistry
- Heavy Metal Exposure and Toxicity
- Geological formations and processes
- Freshwater macroinvertebrate diversity and ecology
Commonwealth Scientific and Industrial Research Organisation
2007-2025
Health Sciences and Nutrition
2019-2024
CSIRO Land and Water
2014-2023
WaterNSW
2020
Bhabha Atomic Research Centre
2006-2008
Australian Nuclear Science and Technology Organisation
2007
CSIRO Manufacturing
2007
Division of Energy
2002
University of Canberra
1998
WRc (United Kingdom)
1987-1993
Metal oxide nanoparticles are finding increasing application in various commercial products, leading to concerns for their environmental fate and potential toxicity. It is generally assumed that will persist as small particles aquatic systems bioavailability could be significantly greater than of larger particles. The current study using nanoparticulate ZnO (ca. 30 nm) has shown this not always so. Particle characterization transmission electron microscopy dynamic light scattering techniques...
ADVERTISEMENT RETURN TO ISSUEPREVFeatureNEXTTransformations of Nanomaterials in the EnvironmentGregory V. Lowry*†‡, Kelvin B. Gregory†‡, Simon C. Apte§, and Jamie R. Lead∥#View Author Information† Center for Environmental Implications Nanotechnology, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States‡ Civil Engineering, States§ Contaminant Chemistry Ecotoxicology Program, CSIRO Land Water, Locked Bag 2007, Kirrawee NSW 2232, Australia∥ School Geography, Earth Sciences,...
The effects of the short-term resuspension a contaminated anoxic estuarine sediment on solid-phase metal speciation have been studied. Preliminary experiments investigated oxidation rates model sulfide phases to provide mechanistic information for interpreting observations natural sediment. FeS and MnS were particularly labile oxidized rapidly in aerated waters. In contrast, CdS, CuS, PbS, ZnS kinetically stable over periods several hours. rate free (HS-) was significantly slower than that...
Environmental context. It cannot be assumed that nanomaterials entering aquatic environments will have the same impacts on biota as their macroscopic particle equivalents. If toxicities are different, this implications for way in which nanomaterial usage is regulated. Algae, at bottom of food chain, likely to a sensitive indicator toxic effects. Understanding physical and chemical factors controlling nanoparticle toxicity algae assist evaluating ecological risk. Abstract. In assessing risks...
Abstract Algal toxicity tests based on growth inhibition over 72 h have been extensively used to assess the of contaminants in natural waters. However, these laboratory use high cell densities compared those found aquatic systems order obtain a measurable algal response. The and test duration can result changes chemical speciation, bioavailability, throughout test. With recent application flow cytometry ecotoxicology, it is now possible lower initial minimize speciation changes. copper...
Algal toxicity tests based on growth inhibition over 72 h have been extensively used to assess the of contaminants in natural waters. However, these laboratory use high cell densities compared those found aquatic systems order obtain a measurable algal response. The and test duration can result changes chemical speciation, bioavailability, throughout test. With recent application flow cytometry ecotoxicology, it is now possible lower initial minimize speciation changes. copper static...
The bioaccumulation of mercury in the food webs incorporating major piscivorous fish species Lake Murray, Papua New Guinea, has been characterised. Methylmercury concentrations increased with trophic level and proportion total present as methylmercury from <1% plants to 94% fish. factors (BAFs) were similar those found temperate environments, a typical increase 1 log unit between planktivore piscivore levels. greatest occurred seston water column (log BAF 5.36). levels regulatory concern...
The stability of metal sulfides to oxidation in seawater was investigated short-term (24 h) resuspension experiments using natural sediments and synthetic sulfide phases. Using acid volatile (AVS) measurements, ZnS, PbS, CdS phases were shown be resistant oxidation. AVS resuspended, highly anoxic, contaminated rapidly oxidized with <6% remaining after 24 h. This inconsistent their high particulate lead zinc content, which should stabilize against oxidation, suggesting that a large proportion...
The advances in studies of trace metal speciation and bioavailability since Mark Florence’s 1982 review the topic, published Talanta, have been comprehensively reviewed. While relative merits kinetic equilibrium approaches are still being determined, applications stripping voltammetry, including application microelectrodes an appreciation detection windows both CSV ASV, matched by introduction new dynamic techniques diffusive gradients thin films (DGTs), permeation liquid membranes (PLMs),...
Rates of aggradation and infilling accommodation space along lowland channels in response to postglacial sea level rise should depend on sediment supply. The Strickland Fly rivers join at just 6 m above have experienced the same Holocene rise. Historically, has carried about 7 times load 1.4 water discharge as Fly. Therefore we hypothesize that floodplain be more developed consequently presently capturing proportionately less than River. We use mine‐derived elevated Pb Ag concentrations 111...
Metal risk assessment of industrialized harbors and coastal marine waters requires the application robust water quality guidelines to determine likelihood biological impacts. Currently there is no such guideline available for aluminium in waters. A 24 µg total Al/L has been developed based on chronic 10% inhibition or effect concentrations (IC10 EC10) no-observed-effect (NOECs) from 11 species (2 literature values 9 tested including temperate tropical species) representing 6 taxonomic...
The acidification of water in mining areas is a global environmental issue primarily catalyzed by sulfur-oxidizing bacteria (SOB). Little known about microbial sulfur cycling circumneutral pH mine tailing impoundment waters. Here we investigate biological oxidation over four years tailings cap, integrating aqueous geochemistry, genome-resolved metagenomics and metatranscriptomics. community consistently dominated neutrophilic, chemolithoautotrophic SOB (relative abundances ~76% 2015, ~55%...
Environmental context Aluminium may be released into coastal waters in dissolved and particulate forms from urban runoff, industrial discharges acid sulfate soils. Aquatic organisms experience toxic effects exposure to aluminium. Therefore, the current study reports geochemical controls such as speciation, precipitation adsorption that influence these aluminium field laboratory. Abstract A combination of laboratory investigations was conducted order gain an understanding dynamics seawater...
The biogeochemistry of acid mine drainage (AMD) derived from waste rock associated sulfide mineral oxidation is relatively well-characterized and linked to Acidithiobacillus spp.. However, little understood about the microbial communities sulfur cycling before AMD develops, a key component its prevention. This study aimed examine circum-neutral mining impacted water (MIW) laboratory enrichments for oxidizing bacteria (SoxBac). MIW in situ differed diversity, structure relative abundance...
Sulfur oxidizing bacteria (SOB) play a key role in sulfur cycling mine tailings impoundment (TI) waters, where concentrations are typically high. However, our understanding of SOB via potential S oxidation pathways ( sox , r dsr and 4 I) these globally ubiquitous contexts, remains limited. Here, we identified TI water column community composition, metagenomics derived metabolic repertoires, physicochemistry, aqueous concentration speciation four Canadian base metal mine,...