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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 7 2017

Environmental context. Lipids released from lysis of phytoplankton cells are enriched in the sea surface microlayer. Such surface-active organics can be transferred through bursting bubbles to sea-spray aerosols where they can influence atmospheric chemistry. The results presented here suggest that phospholipids combine more readily with SO42− than with Br, leading to enrichment of organic-coated sulfate salts in marine aerosols.

EN17129Isolation and purification treatments change the metal-binding properties of humic acids: effect of HF/HCl treatment

Wander G. Botero, Michael Pineau, Noémie Janot, Rute F. Domingos, José Mariano, Luciana S. Rocha, Jan E. Groenenberg, Marc F. Benedetti and José P. Pinheiro
pp. 417-424

Environmental context. Studying the mechanism of binding between metals and natural organic matter is fundamental to understanding the transport and availability of these contaminants in the environment. The influence of sample treatment on the purification of organic matter showed significant differences in the interaction with metals. The results will contribute to improved modelling of metal binding to organic matter in soils, thereby providing a basis for a more realistic risk assessment.

EN17130Impacts of elevated pCO2 on trace gas emissions in two microalgae: Phaeocystis globosa and Nitzschia closterium

Pei-Feng Li, Gui-Peng Yang, Jing Zhang, Maurice Levasseur, Chun-Ying Liu, Jing Sun and Wei Yang
pp. 425-441

Environmental context. Ocean acidification can affect marine microalgae, which can produce climate-active trace gases such as dimethylsulfide and various halocarbons. We conducted monoculture experiments simulating future ocean acidification, and showed that trace gas emissions are affected by elevated pCO2 to different degrees. The responses of trace gases to elevated pCO2 are compound- and species-specific.

Environmental context. To aid the transition to sustainable chemistry there is a need to improve the degradability of chemicals and limit the use of organic solvents. Singlet oxygen, 1O2, is involved in organic synthesis and photochemical degradation; however, information on its aqueous-phase reactivity is limited. We developed cheminformatics models for photooxidation rate constants that will enable accurate assessment of aquatic photochemistry without experimentation.

EN17138A silver fibre prepared by a facile method for solid-phase microextraction of polycyclic aromatic hydrocarbons

Yu Tian, Jie Zhou, Juanjuan Feng, Xiuqin Wang, Chuannan Luo and Min Sun
pp. 451-457

Environmental context. Polycyclic aromatic hydrocarbons are widespread environmental contaminants of human health concern because of their carcinogenicity. The compounds have low water solubility and thus their measurement in water requires an efficient preconcentration step. We report a simple method for concentrating polycyclic aromatic hydrocarbons from environmental water samples based on their absorption onto a silver fibre.

EN17073Kinetics of mercury accumulation by freshwater biofilms

Perrine Dranguet, Vera I. Slaveykova and Séverine Le Faucheur
pp. 458-467

Environmental context. Mercury (Hg) is a major environmental contaminant due to its toxicity, accumulation and biomagnification along the food chain. We demonstrate that Hg accumulation by biofilms, one possible entry point for Hg into food webs, is rapid and depends on biofilm structure and composition. These findings have important implications for the understanding of Hg bioavailability and effects towards aquatic microorganisms.

Online Early

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

Published online 22 March 2018

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

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.

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.

Published online 21 March 2018

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

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.

Published online 21 March 2018

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

Magaly Valencia-Avellan, Rebecca Slack, Anthony Stockdale and Robert John George Mortimer

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.

Published online 20 March 2018

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

Sahar Farzadnia, Rama D. Nimmagadda and Christopher McRae

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.

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.

Published online 16 March 2018

EN17161Analysis of trichloroethene vapour in soil-gas samples using solid-sorbent tubes with gas chromatography/mass spectrometry

Candice M. Duncan, Jon Mainhagu, Dan Lin and Mark L. Brusseau

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.

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