Does an analysis of polychlorinated biphenyl (PCB) distribution in mountain soils across China reveal a latitudinal fractionation paradox?

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Publikace nespadá pod Ekonomicko-správní fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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ZHENG Qian NIZZETTO Luca MULDER Marie Daniëlle SÁŇKA Ondřej LAMMEL Gerhard LI Jun BING Haijian LIU Xin JIANG Yishan LUO Chunlin ZHANG Gan

Rok publikování 2014
Druh Článek v odborném periodiku
Časopis / Zdroj Environmental Pollution
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www http://www.sciencedirect.com/science/article/pii/S0269749114003601
Doi http://dx.doi.org/10.1016/j.envpol.2014.08.021
Obor Kontaminace a dekontaminace půdy včetně pesticidů
Klíčová slova POP; PCB; Fractionation; Cold trapping; Mountain; Soil; Latitude; Forest
Popis Organic and mineral soil horizons from forests in 30 mountains across China were analysed for polychlorinated biphenyl (PCB). Soil total organic carbon (TOC) content was a key determinant of PCB distribution explaining over 90% of the differences between organic and mineral soils, and between 30% and 60% of the variance along altitudinal and regional transects. The residual variance (after normalization by TOC) was small. Tri- to tetra-CB levels were higher in the South in relation to high source density and precipitation. Heavier congeners were instead more abundant at mid/high-latitudes where the advection pattern was mainly from long range transport. This resulted in a latitudinal fractionation opposite to theoretical expectations. The study showed that exposure to sources with different characteristics, and possibly accumulation/degradation trends of different congeners in soils being out-of-phase at different latitudes, can lead to an unsteady large scale distribution scenario conflicting with the thermodynamic equilibrium perception. (C) 2014 Elsevier Ltd. All rights reserved.
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