Informace o publikaci

Elevated Mobility of Persistent Organic Pollutants in the Soil of a Tropical Rainforest

Autoři	ZHENG Qian NIZZETTO Luca LIU Xiang BORGA Katrine STARRFELT Jostein LI Jun JIANG Yishan LIU Xin JONES Kevin C. ZHANG Gan
Rok publikování	2015
Druh	Článek v odborném periodiku
Časopis / Zdroj	Environmental Science and Technology
Fakulta / Pracoviště MU	Přírodovědecká fakulta
Citace
www	http://pubs.acs.org/doi/abs/10.1021/es5058677
Doi	http://dx.doi.org/10.1021/es5058677
Obor	Kontaminace a dekontaminace půdy včetně pesticidů
Klíčová slova	POLYCHLORINATED-BIPHENYLS; ORGANOCHLORINE PESTICIDES; LAKE-SUPERIOR; FATE; CARBON; CHINA; PCBS; EXCHANGE; DECOMPOSITION; BOREAL
Popis	Semivolatile persistent organic pollutants. (POP) are bioaccumulative and toxic contaminants. Their global distribution depends on source distribution, atmospheric transport, degradation, and the exchange with ocean and land surfaces. Forests are crucial terrestrial reservoirs due to the comthonly envisaged high capacity of their surface soils to store and immobilize airborne contaminants bound to organic matter. Our results, show that POPs can be unexpectedly mobile in the soil of a tropical rainforest due to fast litter turnover (leading to rapid POP transfer lb the subsoil) and leaching rates exceeding degradation rates especially for more hydrophobic congeners. Co-transport in association with leaching fine particulate and dissolved organic matter appears as a relevant driver of this PCB export. A markedly different distribution pattern is displayed in this soil in comparison to soils of colder environments with lower overall storage capacity. These findings show that biogeochemistry of organic matter degradation and: weathering can influence POP soil fate. Because tropical forests represent, 60% of the global terrestrial highlighted dynamics might have anjrnplication for the general distribution of these contaminants.