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Environmental Chemistry

Environmental Chemistry

Environmental Chemistry publishes papers reporting chemistry that enhances our understanding of the environment including air, water, soil, sediments, and biota. Read more about the journalMore

Editor-in-Chief: Kevin Francesconi

Current Issue

Environmental Chemistry

Volume 14 Number 8 2017

EN17133Effect of episodic rainfall on aqueous metal mobility from historical mine sites

Magaly Valencia-Avellan, Rebecca Slack, Anthony Stockdale and Robert John George Mortimer
pp. 469-475

Environmental context Episodic extreme rainfall events may affect metal dynamics in rivers flowing within historical metal mining areas. This study provides an analysis of the water chemistry and geochemical processes associated with mobilisation of metals during episodic rainfall events. Findings could be used to assess the environmental quality of streams draining spoil waste areas with similar geochemical conditions, and thereby be used to guide future management strategies.

EN17114Degradation of pentachlorophenol as a model hazardous and recalcitrant organochlorinated pollutant using AgIII

Ileana R. Zamora-Garcia, Alejandro Alatorre-Ordaz, Jorge G. Ibanez, Julio Cesar Torres-Elguera, Kazimierz Wrobel and Silvia Gutierrez-Granados
pp. 476-485

Environmental context. Electrochemistry offers potential applications for environmental remediation. Pentachlorophenol, a highly toxic and recalcitrant halogenated compound, is degraded by a novel oxidant produced electrochemically, and the intermediates and products of the degradation are investigated. Cyclic remediation systems merit further study.

Environmental context. It is practicable to remediate chlorobenzene-contaminated groundwater by in situ chemical oxidation. This study shows highly efficient degradation of chlorobenzene by an Fe-based process in a wide range of pH values. The technology is feasible for the removal of chlorobenzene from aqueous solutions and is appropriate for remediation of groundwater.

Environmental context. Chlorinated chemicals are priority contaminants that pose significant risk to human health, and require state-of-the-art sampling techniques for varying matrices. A soil-gas sampling method was developed for the quantification of vapours of trichloroethene, a major chlorinated contaminant, present just above the groundwater zone. The method addresses sampling times, volumes and low-level trichloroethene concentrations.

EN17095A comparative structural study of nitrogen-rich fulvic acids from various Antarctic lakes

Sahar Farzadnia, Rama D. Nimmagadda and Christopher McRae
pp. 502-514

Environmental context Fulvic acids are important naturally occurring organic materials, but unravelling their complex structures remains challenging. This paper suggests chemical analyses to facilitate structural studies of fulvic acids, and to investigate the similarities and differences of fulvic acids from various natural sources.

EN17158Deconstructing the redox cascade: what role do microbial exudates (flavins) play?

Ekaterina Markelova, Christopher T. Parsons, Raoul-Marie Couture, Christina M. Smeaton, Benoit Madé, Laurent Charlet and Philippe Van Cappellen
pp. 515-524

Environmental context. Redox potential is a controlling variable in aquatic chemistry. Through time series data, we show that microbial exudates released by bacteria may control trends in redox potential observed in natural waters. In particular, electron transfer between these exudates and the electrode could explain the values measured in the presence of abundant oxidants such as oxygen and nitrate.

Online Early

The peer-reviewed and edited version of record published online before inclusion in an issue

Published online 20 April 2018

EN17124Evaluation of phosphate-uptake mechanisms by Fe(III) (oxyhydr)oxides in Early Proterozoic oceanic conditions

Christoffer Hemmingsson, Iain K. Pitcairn and Ernest Chi Fru

Environmental context. Reconstructing the Precambrian oceanic P cycle, in conjunction with the As cycle, is critical for understanding the rise of atmospheric O2 in Earth’s history. Bioavailable phosphorus (P) has been found to regulate photosynthetic activity, whereas dissolved arsenic (As) maxima correlate with photosynthetic minima. New data on empirical adsorption and coprecipitation models with Fe(III) (oxyhydr)oxides suggest coprecipitation is a more efficient method of P sorption than is adsorption in Precambrian surface ocean conditions.

Published online 22 March 2018

EN16203Time-resolved microbial guild responses to tidal cycling in a coastal acid-sulfate system

Yu-Chen Ling, Han Ming Gan, Michelle Bush, Richard Bush and John W. Moreau

Environmental context. Microbes play key roles in controlling acidification and metal toxicity in coastal acid-sulfate soils. We characterised the time-dependent metabolic activities of abundant and rare taxa in acidifying tidal wetlands and showed that rare taxa exhibiting higher activity may exert significant influence on iron- and sulfur-cycling. Our findings yield new insights into the drivers and timing of iron- and sulfur-cycling in coastal acid-sulfate systems.

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