Obst, M; Grathwohl, P; Kappler, A; Eibl, O; Peranio, N; Gocht, T: Quantitative High-Resolution Mapping of Phenanthrene Sorption to Black Carbon Particles, Environmental Science and Technology, 45(17), 7314-7322 (2011), online: 15.07.2011, doi:10.1021/es2009117 [Link]
Abstract:

Sorption of hydrophobic organic contaminants such as polycyclic aromatic hydrocarbons (PAHs) to black carbon (BC) particles has been the focus of numerous studies. Conclusions on sorption mechanisms of PAH on BC were mostly derived from studies of sorption isotherms and sorption kinetics, which are based on batch experiments. However, mechanistic modeling approaches consider processes at the subparticle scale, some including transport within the pore-space or different spatial pore-domains. Direct evidence based on analytical techniques operating at the submicrometer scale for the location of sorption sites and the adsorbed species is lacking. In this work, we identified, quantified, and mapped the sorption of PAHs on different BC particles (activated carbon, charcoal and diesel soot) on a 25–100 nm scale using scanning transmission X-ray microscopy (STXM). In addition, we visualized the pore structure of the particles by transmission electron microscopy (TEM) on the 1–10 nm-scale. The combination of the chemical information from STXM with the physical information from TEM revealed that phenanthrene accumulates in the interconnected pore-system along primary “cracks” in the particles, confirming an adsorption mechanism.

Aktuelle Termine


BayCEER-Kolloquium:
Do. 12.12.2019
Iron, sulfur and a pinch of antimony - new perspectives on secondary mineral pathways and metalloid mobility
Geographisches Kolloquium:
Di. 10.12.2019
Intensify or diversify? How agriculture affects biodiversity and ecosystem processes in European farmland
Di. 17.12.2019
The meat of the Anthropocene: Food, capital and the globalisation of industrialised animal killing
Ökologisch-Botanischer Garten:
So. 05.01.2020
Auf ins Neue! Winterspaziergang im ÖBG
So. 05.01.2020
Konzert: Musikalischer Jahresbeginn mit den Rockin`Dinos
BayCEER Blog
24.05.2019
Stoichiometric controls of C and N cycling
07.05.2019
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
07.05.2019
EGU – interesting research and free coffee
16.04.2019
Picky carnivorous plants?
RSS Blog als RSS Feed
Wetter Versuchsflächen
Luftdruck (356m): 968.4 hPa
Lufttemperatur: 7.1 °C
Niederschlag: 0.2 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 7.6 km/h
Wind (Max.): 15.1 km/h
Windrichtung: SW

...mehr
Globalstrahlung: 11 W/m²
Lufttemperatur: 3.1 °C
Niederschlag: 0.7 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 33.4 km/h

...mehr
Diese Webseite verwendet Cookies. weitere Informationen