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Urban Organic Aerosol Exposure: Spatial Variations in Composition and Source Impacts

22-Dec-2017 | Hugh Z. Li; Timothy R. Dallmann; Xiang Li; Peishi Gu; Albert A. Presto, Environmental Science & Technology, 2017

We conducted a mobile sampling campaign in a historically industrialized terrain (Pittsburgh, PA) targeting spatial heterogeneity of organic aerosol. Thirty-six sampling sites were chosen based on stratification of traffic, industrial source density, and elevation. We collected organic carbon ...


High-throughput in Vitro Data To Inform Prioritization of Ambient Water Monitoring and Testing for Endocrine Active Chemicals

22-Dec-2017 | Wendy J. Heiger-Bernays; Susanna Wegner; David J. Dix, Environmental Science & Technology, 2017

The presence of industrial chemicals, consumer product chemicals, and pharmaceuticals is well documented in waters in the U.S. and globally. Most of these chemicals lack health-protective guidelines and many have been shown to have endocrine bioactivity. There is currently no systematic or ...


Active Glucocorticoids Have a Range of Important Adverse Developmental and Physiological Effects on Developing Zebrafish Embryos

22-Dec-2017 | Raffael Alois Willi; Susanne Faltermann; Timm Hettich; Karl Fent, Environmental Science & Technology, 2017

Glucocorticoids in aquatic systems originating from natural excretion and medical use may pose a risk to fish. Here, we analyzed physiological and transcriptional effects of clobetasol propionate (CLO), cortisol and cortisone in zebrafish embryos as single compounds and binary mixtures. CLO and ...


Influence of Magnetite Stoichiometry on the Binding of Emerging Organic Contaminants

21-Dec-2017 | Wei Cheng; Rémi Marsac; Khalil Hanna, Environmental Science & Technology, 2017

While the magnetite stoichiometry (i.e., Fe(II)/Fe(III) ratio) has been extensively studied for the reductive transformation of chlorinated or nitroaromatic compounds, no work exists examining the influence of stoichiometry of magnetite on its binding properties. This study, for the first time, ...


Ferrous Iron Oxidation under Varying pO2 Levels: The Effect of Fe(III)/Al(III) Oxide Minerals and Organic Matter

21-Dec-2017 | Chunmei Chen; Aaron Thompson, Environmental Science & Technology, 2017

Abiotic Fe(II) oxidation by O2 commonly occurs in the presence of mineral sorbents and organic matter (OM) in soils and sediments; however, this tertiary system has rarely been studied. Therefore, we examined the impacts of mineral surfaces (goethite and γ-Al2O3) and organic matter [Suwannee ...


Production of N2O5 and ClNO2 through Nocturnal Processing of Biomass-Burning Aerosol

21-Dec-2017 | Adam T. Ahern; Lexie Goldberger; Lydia Jahl; Joel Thornton; Ryan C. Sullivan, Environmental Science & Technology, 2017

Biomass burning is a source of both particulate chloride and nitrogen oxides, two important precursors for the formation of nitryl chloride (ClNO2), a source of atmospheric oxidants that is poorly prescribed in atmospheric models. We investigated the ability of biomass burning to produce N2O5(g) ...


Pollutants in Plastics within the North Pacific Subtropical Gyre

21-Dec-2017 | Qiqing Chen; Julia Reisser; Serena Cunsolo; Christiaan Kwadijk; Michiel Kotterman; Maira Proietti; Boyan Slat; Franc ..., Environmental Science & Technology, 2017

Here we report concentrations of pollutants in floating plastics from the North Pacific accumulation zone (NPAC). We compared chemical concentrations in plastics of different types and sizes, assessed ocean plastic potential risks using sediment quality criteria, and discussed the implications of ...


Aerosol Emissions from Great Lakes Harmful Algal Blooms

20-Dec-2017 | Nathaniel W. May; Nicole E. Olson; Mark Panas; Jessica L. Axson; Peter S. Tirella; Rachel M. Kirpes; Rebecca L. Crai ..., Environmental Science & Technology, 2017

In freshwater lakes, harmful algal blooms (HABs) of Cyanobacteria (blue-green algae) produce toxins that impact human health. However, little is known about the lake spray aerosol (LSA) produced from wave-breaking in freshwater HABs. In this study, LSA were produced in the laboratory from ...


Comparative Analysis of Supply Risk-Mitigation Strategies for Critical Byproduct Minerals: A Case Study of Tellurium

20-Dec-2017 | Michele L. Bustamante; Gabrielle Gaustad; Elisa Alonso, Environmental Science & Technology, 2017

Materials criticality assessment is a screening framework increasingly applied to identify materials of importance that face scarcity risks. Although these assessments highlight materials for the implicit purpose of informing future action, the aggregated nature of their findings make them ...


Increases of Total Mercury and Methylmercury Releases from Municipal Sewage into Environment in China and Implications

20-Dec-2017 | Maodian Liu; Peng Du; Chenghao Yu; Yipeng He; Haoran Zhang; Xuejun Sun; Huiming Lin; Yao Luo; Han Xie; Junming Guo; ..., Environmental Science & Technology, 2017

As a globally transported pollutant, mercury (Hg) released from human activity and methylmercury (MeHg) in the food web are global concerns due to their increasing presence in the environment. In this study, we found that Hg released from municipal sewage into the environment in China is a ...


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