Atmospheric deposition of semivolatile organic compounds to two forest canopies

Critical evaluation of a new passive exchange-meter for assessing multimedia fate of persistent organic pollutants at the air-soil interface

“…The mass balance approach allows intrinsic quality control. Unlike other types of deposimeters (Brorstrom-Lunden and Lofgren, 1998;Horstmann and McLachlan, 1998), the impacting surface of the PEM mimic the natural material at the interface between air and soil, largely reducing measurement artifacts. Finally, the PEM resolve also the downward export and it is suitable for process oriented investigations.…”

“…the PCBs, targeted in this paper) it can be assumed that degradation is not relevant during the 2 months of deployment time and it is therefore considered as negligible. This assumption has been previously used in similar studies (Horstmann and McLachlan, 1998;Nizzetto et al, 2008). Half-lives of PCBs in soils or litter are in the order of several years (Sinkkonen and Paasivirta, 2000).…”

Modelling benzo[a]pyrene in air and vegetation for different land uses and assessment of increased health risk in the Iberian Peninsula

“…Gas-phase contribution for BaP is negligible, hence ø ≈ 1 and vp can be obtained by equation 2. Since no concomitant atmospheric measurements were available, vp could not be calculated for our samples, a general value for the deposition velocity for BaP over a coniferous forest canopy reported by Horstmann and McLachlan (1998) was used:…”

Forest Filter Effect versus Cold Trapping Effect on the Altitudinal Distribution of PCBs: A Case Study of Mt. Gongga, Eastern Tibetan Plateau

“…20,21 The role of forests in filtering airborne organic pollutants from the atmosphere and transferring them to soil has been termed the "forest filter effect (FFE)." 18 More work is needed to understand the key driving forces of the altitudinal distribution of POPs. We are skeptical of the temperature-driven theory, hypothesizing a more important role of forests in distribution of POPs in mountain areas.…”