Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Accumulation parameters and seasonal trends for PCBs in temperate and boreal forest plant species.
AU - Nizzetto, Luca
AU - Pastore, Cristina
AU - Liu, Xiang
AU - Camporini, Paolo
AU - Stroppiana, Daniela
AU - Herbert, Ben
AU - Boschetti, Mirco
AU - Zhang, Gan
AU - Brivio, Pietro A.
AU - Jones, Kevin C.
AU - Di Guardo, Antonio
PY - 2008/8/15
Y1 - 2008/8/15
N2 - The concentration of polychlorinated biphenyls (PCBs) in the air and vegetation was measured periodically in two alpine forests, during the growing season. Foliage samples from nine plant species typical of the temperate and boreal environment were collected and analyzed. Leaf concentrations of tri- and tetra-CBs showed fast response times with changing temperature and gas-phase concentrations, suggesting that a partitioning equilibrium is approached relatively rapidly (few days) in the field. Heavier compounds showed kinetically limited accumulation trends, not reaching equilibrium during the growing season. Results were used to estimate the bioconcentration factors or equilibrium plant/air partition coefficient (KPA) for each species. Values of log KPA (calculated on a mass/volume basis) ranged between 0.78 and 1.96 and were correlated to the log KOA. Uptake trends of the higher chlorinated compounds showed intraspecific differences which were partially explained by the specific leaf area (SLA).
AB - The concentration of polychlorinated biphenyls (PCBs) in the air and vegetation was measured periodically in two alpine forests, during the growing season. Foliage samples from nine plant species typical of the temperate and boreal environment were collected and analyzed. Leaf concentrations of tri- and tetra-CBs showed fast response times with changing temperature and gas-phase concentrations, suggesting that a partitioning equilibrium is approached relatively rapidly (few days) in the field. Heavier compounds showed kinetically limited accumulation trends, not reaching equilibrium during the growing season. Results were used to estimate the bioconcentration factors or equilibrium plant/air partition coefficient (KPA) for each species. Values of log KPA (calculated on a mass/volume basis) ranged between 0.78 and 1.96 and were correlated to the log KOA. Uptake trends of the higher chlorinated compounds showed intraspecific differences which were partially explained by the specific leaf area (SLA).
U2 - 10.1021/es800217m
DO - 10.1021/es800217m
M3 - Journal article
VL - 42
SP - 5911
EP - 5916
JO - Environmental Science and Technology
JF - Environmental Science and Technology
SN - 0013-936X
IS - 16
ER -