Environmental context. The fate of nanomaterials in the environment is related to their colloidal stability. Although numerous studies have examined their homoagglomeration, their low concentration and the presence of high concentrations of natural particles implies that heteroagglomeration rather than homoagglomeration is likely to occur under natural conditions. In this paper, two state-of-the art analytical techniques were used to identify the conditions under which nanosilver was most likely to form heteroagglomerates in natural waters.
Volume 14 Number 1 2017
Environmental context. Carbon and nitrogen isotopes in terrestrial organic matter are widely used for reconstructing past environments, but organic matter is exposed to degradation as soon as it is deposited during what is called early diagenesis. This study explores the effects of this process on organic carbon and nitrogen isotopes, and concludes that it homogenises an environmental signal by integrating all their components. Thus, early diagenesis may not preclude paleoenvironmental reconstructions.
EN16080Theoretical study of the hydrolysis of HOSO+NO2 as a source of atmospheric HONO: effects of H2O or NH3
Environmental context. Nitrous acid (HONO) has long been recognized as an important atmospheric pollutant, with the reaction of HOSO + NO2 being a source of HONO. We explore the effects of an additional water or ammonia molecule on this reaction. Calculations show that the ammonia molecule has a more effective role than the water molecule in assisting the reaction.
EN16039PEST-ORCHESTRA, a tool for optimising advanced ion-binding model parameters: derivation of NICA-Donnan model parameters for humic substances reactivity
Environmental context. The environmental behaviour of trace metals in soils and waters largely depends on the chemical form (speciation) of the metals. Speciation software programs combining models for the binding of metals to soil and sediment constituents are powerful tools in environmental risk assessment. This paper describes a new combination of speciation software with a fitting program to optimise geochemical model parameters that describes proton and metal binding to humic substances.
Environmental context. Cerium, a Technology Critical Element with many technical, agricultural, and medicinal applications, is increasingly being discharged to the environment. One of the best ways to remove cerium from wastes is its fixation into inexpensive bulk material such as vermiculite. This paper investigates the mechanism of CeIII and CeIV uptake and capture by vermiculite in neutral and acidic aqueous solutions.
Environmental context. Eutrophication caused by excessive inputs of phosphorus is a prevalent global environmental problem. Reactive phosphorus released from sediments was measured by two new in situ passive sampling techniques capable of high-resolution measurements of phosphorus concentration. The methods provide the scientific evidence for solving the problems associated with deteriorating surface water quality.
EN16130Ion-exchange technique (IET) for measuring Cu2+, Ni2+ and Zn2+ activities in soils contaminated with metal mixtures
Environmental context. Terrestrial environments receiving trace metal contaminants are often impacted by more than one metal. This study demonstrates the adaptation of an ion-exchange technique to simultaneously obtain Cu2+, Ni2+ and Zn2+ activities in soil extracts. These measurements can be used to better understand and predict the behaviour and bioavailability of soil metals in metal–mixture contamination scenarios.
EN16038Insights into natural organic matter and pesticide characterisation and distribution in the Rhone River
Environmental context. Natural organic matter in surface waters is a transport vector for environmental pollutants with both its concentration and composition influencing pollutant fate. Characterisation of organic matter in surface waters, crucial to understanding pollutant transport, should also account for spatial variation along the water source. The present work characterises the natural organic matter in the Rhone River and describes the distributions of various pesticides and metabolites along the river.
The peer-reviewed and edited version of record published online before inclusion in an issue
Environmental context. Vanadium, a metal pollutant from fossil fuels and slags, may be toxic, thereby necessitating an understanding of its environmental chemistry. One important factor that controls the mobility and bioavailability of vanadium is its binding to iron oxides. This study focuses on the characterization and modelling of vanadium adsorption onto ferrihydrite. The new model can be used to simulate the transport and bioavailability of vanadium in the environment.
EN16136Ion exchange technique (IET) to characterise Ag+ exposure in soil extracts contaminated with engineered silver nanoparticles
Environmental context. Biosolid-amended soils are likely sinks for manufactured silver nanoparticles, the environmental toxicity of which is believed to be related to the release and accumulation of Ag+ ions. This study demonstrates how an ion exchange technique can be applied to soil extracts to provide Ag+ measurements at low, environmentally relevant levels. The technique is a valuable addition to existing analytical methods for tracking the behaviour of Ag nanoparticles and Ag+ ions in the terrestrial environment.
EN16152Atmospheric short-chain-chlorinated paraffins in Melbourne, Australia – first extensive Southern Hemisphere observations
Environmental context. This study presents the first comprehensive set of ambient atmospheric concentrations of short-chain-chlorinated paraffins in the southern hemisphere. The data show a seasonal cycle with a summer maximum and a winter minimum. The seasonal cycle is consistent with temperature dependence of the vapour pressure of the short-chain-chlorinated paraffins resulting in partitioning between the atmosphere and other reservoirs with a secondary modulation by soil moisture.
Environmental context. Nanoscale zero-valent iron is a promising material for environmental engineering and groundwater remediation. However, the environmental behaviour and fate of nanoscale iron that is essential for applications and risk assessment is still uncertain. We report a study on the aggregation behaviour and mobility of nanoscale iron in the aquatic environment using colloidal chemical methods.
EN16137On-site determination of bisphenol A in river water by a novel solid-state electrochemiluminescence quenching sensor
Environmental context. Bisphenol A is an endocrine disruptor, which may migrate and transfer to the environment where it presents a potential risk to the health of humans and animals. Herein, we demonstrate that electrospun nanofibers could be used to develop a highly efficient solid-state quenching sensor for on-site determination of bisphenol A in river water samples. The strategy has great potential for routine environmental analyses.
EN16128Online analysis of secondary organic aerosols from OH-initiated photooxidation and ozonolysis of α-pinene, β-pinene, Δ3-carene and d-limonene by thermal desorption–photoionisation aerosol mass spectrometry
Environmental context. Secondary organic aerosol, formed by oxidation of volatile precursors such as monoterpenes, is a major contributor to the total atmospheric organic aerosol. We focus on the online mass spectrometric analysis of the aerosol generated by oxidation products of four major monoterpenes in an environmental chamber. Numerous important monoterpene oxidation products were clearly observed and provided a direct comparison of the formation of biogenic secondary organic aerosols.
EN16135Using fluorescence quenching combined with two-dimensional correlation fluorescence spectroscopy to characterise the binding-site heterogeneity of dissolved organic matter with copper and mercury in lake sediments
Environmental context. Dissolved organic matter (DOM) plays an important role in influencing the migration and ultimate fate of metals. Different sources of pollution resulted in changes in the structure of sediment DOM in Lake Wuliangsuhai. We investigate the binding properties of DOM with CuII and HgII using fluorescence quenching combined with two-dimensional correlation spectroscopy (2D-COS) in order to demonstrate the influence of different sources of DOM on metals.
These articles have been peer reviewed and accepted for publication. They are still in production and have not been edited, so may differ from the final published form.
Temporal and spatial variations of three dimethylated sulfur compounds in the Changjiang Estuary and its adjacent area during summer and winter
Mercury (II) Reduction and Sulfite Oxidation in Aqueous Systems: Kinetic Study and Speciation Modeling
The Most Read ranking is based on the number of downloads in the last 60 days from the CSIRO PUBLISHING website. Usage statistics are updated daily.
Seasonal differences of urban organic aerosol composition – an ultra-high resolution mass spectrometry studyEnvironmental Chemistry 9 (3)Angela G. Rincón, Ana I. Calvo, Mathias Dietzel, Markus Kalberer
Dialkylsulfate formation in sulfuric acid-seeded secondary organic aerosol produced using an outdoor chamber under natural sunlightEnvironmental Chemistry 13 (4)Jiaying Li, Myoseon Jang, Ross L. Beardsley
Organic fluorine content in aqueous film forming foams (AFFFs) and biodegradation of the foam component 6 : 2 fluorotelomermercaptoalkylamido sulfonate (6 : 2 FTSAS)Environmental Chemistry 10 (6)Barbara Weiner, Leo W. Y. Yeung, Erin B. Marchington, Lisa A. D'Agostino, Scott A. Mabury
Environmental Chemistry 13 (1)Leo W. Y. Yeung, Scott A. Mabury
Environmental Chemistry 8 (3)Jessica M. Wilson, Richard F. Carbonaro
Capillary electrophoresis facilitates determination of metal complex stoichiometry by Job’s method of continuous variationEnvironmental Chemistry 10 (5)Nathan E. Boland, Alan T. Stone
Environmental Chemistry 14 (1)Sébastien Maillette, Caroline Peyrot, Tapas Purkait, Muhammad Iqbal, Jonathan G. C. Veinot, Kevin J. Wilkinson
PEST-ORCHESTRA, a tool for optimising advanced ion-binding model parameters: derivation of NICA-Donnan model parameters for humic substances reactivityEnvironmental Chemistry 14 (1)Noémie Janot, José Paulo Pinheiro, Wander Gustavo Botero, Johannes C. L. Meeussen, Jan E. Groenenberg
Environmental Chemistry 13 (1)Michelle L. Hladik, Dana W. Kolpin
Molecular composition of urban organic aerosols on clear and hazy days in Beijing: a comparative study using FT-ICR MSEnvironmental Chemistry 13 (5)Bin Jiang, Bin Yu Kuang, Yongmei Liang, Jingyi Zhang, X. H. Hilda Huang, Chunming Xu, Jian Zhen Yu, Quan Shi
Environmental Chemistry 8 (3)E. Tipping, S. Lofts, J. E. Sonke
Antimony leaching from contaminated soil under manganese- and iron-reducing conditions: column experimentsEnvironmental Chemistry 11 (6)Kerstin Hockmann, Susan Tandy, Markus Lenz, Rainer Schulin
Ion-exchange technique (IET) for measuring Cu2+, Ni2+ and Zn2+ activities in soils contaminated with metal mixturesEnvironmental Chemistry 14 (1)D. M. Schwertfeger, W. H. Hendershot
Environmental Chemistry 8 (2)Katharina Porsch, Andreas Kappler
Proteins are a major component of dissolved organic nitrogen (DON) leached from terrestrially aged Eucalyptus camaldulensis leavesEnvironmental Chemistry 13 (5)Clayton W. Harris, Ewen Silvester, Gavin N. Rees, John Pengelly, Ljiljana Puskar
Theoretical study of the hydrolysis of HOSO+NO2 as a source of atmospheric HONO: effects of H2O or NH3Environmental Chemistry 14 (1)Yan-Qiu Sun, Xu Wang, Feng-Yang Bai, Xiu-Mei Pan
Insights into natural organic matter and pesticide characterisation and distribution in the Rhone RiverEnvironmental Chemistry 14 (1)Danielle L. Slomberg, Patrick Ollivier, Olivier Radakovitch, Nicole Baran, Nicole Sani-Kast, Auguste Bruchet, Martin Scheringer, Jérôme Labille
Effects of myo-inositol hexakisphosphate and orthophosphate adsorption on aggregation of CeO2 nanoparticles: roles of pH and surface coverageEnvironmental Chemistry 13 (1)Biao Wan, Yupeng Yan, Fan Liu, Wenfeng Tan, Jiajie He, Xionghan Feng
Spatiotemporal redox dynamics in a freshwater lake sediment under alternating oxygen availabilities: combined analyses of dissolved and particulate electron acceptorsEnvironmental Chemistry 13 (5)Maximilian P. Lau, Michael Sander, Jörg Gelbrecht, Michael Hupfer
Effects of nitrate and humic acid on enrofloxacin photolysis in an aqueous system under three light conditions: kinetics and mechanismEnvironmental Chemistry 11 (3)Yang Li, Junfeng Niu, Enxiang Shang, Mengyuan Zheng, Tianlai Luan