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Environmental Science and Technology 47(1)

Overview of articles on POPs in a new issue of the Environmental Science and Technology journal.

Brominated and Chlorinated Flame Retardants in Tree Bark from Around the Globe

Amina Salamova and Ronald A. Hites
pp 349–354

  • Brominated and chlorinated flame retardants were measured in about 40 samples of tree bark from 12 locations around the globe. The analytes were polybrominated diphenyl ethers (PBDE), Dechlorane Plus (DP), decabromodiphenylethane (DBDPE), hexabromocyclododecane (HBCD), hexabromobenzene (HBB), pentabromoethylbenzene (PBEB), pentabromobenzene (PBBz), and tetrabromo-p-xylene (pTBX).

SO-MUM: A Coupled Atmospheric Transport and Multimedia Model Used to Predict Intraurban-Scale PCB and PBDE Emissions and Fate

Susan A. Csiszar, Sreerama M. Daggupaty, Stephanie Verkoeyen, Amanda Giang, and Miriam L. Diamond
pp 436–445

  • A spatially resolved, dynamic version of the Multimedia Urban Model (MUM) and the boundary layer forecast and air pollution transport model BLFMAPS were coupled to build Spatially Oriented MUM (SO-MUM), to estimate emissions and fate of POPs in an urban area on a 5 × 5 km2 cell resolution. SO-MUM was used to back-calculate emissions from spatially resolved measured air concentrations of PCBs and PBDEs in Toronto, Canada.

Multi-Ratio Equilibrium Passive Sampling Method to Estimate Accessible and Pore Water Concentrations of Polycyclic Aromatic Hydrocarbons and Polychlorinated Biphenyls in Sediment

Foppe Smedes, L. Alexander van Vliet, and Kees Booij
pp 510–517

  • The freely dissolved concentration (Cw,0) in the pore water and the accessible (releasable) concentration in the sediment (Cas,0) are important parameters for risk assessment. These parameters were determined by equilibrating contaminated sediments and passive samplers using largely differing sampler–sediment ratios. This method is based on the principle that incubations at low sampler/sediment ratios yield the concentration in the pore water (minor depletion of the sediment phase) and incubations at high sampler/sediment ratios yield the accessible concentration in the sediment (maximum depletion of the sediment phase).

Efficient Oxidative Debromination of Decabromodiphenyl Ether by TiO2-Mediated Photocatalysis in Aqueous Environment

Aizhen Huang, Nan Wang, Ming Lei, Lihua Zhu, Yingying Zhang, Zhifen Lin, Daqiang Yin, and Heqing Tang
pp 518–525

  • Direct evidence was first demonstrated for the oxidative degradation of decabromodiphenyl ether (BDE209) in aqueous TiO2 dispersions under UV irradiation (λ > 340 nm). BDE209 was hardly debrominated over TiO2 in UV-irradiated acetonitrile dispersions, but the addition of water into the dispersions greatly enhanced its photocatalytic oxidative debromination.

Effects of Microplastic on Fitness and PCB Bioaccumulation by the Lugworm Arenicola marina (L.)

Ellen Besseling, Anna Wegner, Edwin M. Foekema, Martine J. van den Heuvel-Greve, and Albert A. Koelmans
pp 593–600

  • It has been speculated that marine microplastics may cause negative effects on benthic marine organisms and increase bioaccumulation of persistent organic pollutants (POPs). Here, we provide the first controlled study of plastic effects on benthic organisms including transfer of POPs. The effects of polystyrene (PS) microplastic on survival, activity, and bodyweight, as well as the transfer of 19 polychlorinated biphenyls (PCBs), were assessed in bioassays with Arenicola marina (L.). PS was pre-equilibrated in natively contaminated sediment.

2.1.2013


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