Temperature dependence of photodegradation of dissolved organic matter to dissolved inorganic carbon and particulate organic carbon

0443076 - BC 2016 RIV US eng J - Journal Article
Porcal, Petr - Dillon, P. J. - Molot, L. A.
Temperature dependence of photodegradation of dissolved organic matter to dissolved inorganic carbon and particulate organic carbon.
PLoS ONE. Roč. 10, č. 6 (2015), e0128884. ISSN 1932-6203. E-ISSN 1932-6203
R&D Projects: GA ČR(CZ) GAP503/12/0781; GA ČR(CZ) GA15-09721S
Institutional support: RVO:60077344
Keywords : dissolved organic carbon * particulate organic carbon * photodegradation * temperature
Subject RIV: DA - Hydrology ; Limnology
Impact factor: 3.057, year: 2015

Five laboratory experiments were done to determine the effect of temperature on photochemical degradation of DOM. Experimental results showed strong dependence of photodegradation on temperature. Mathematical modeling of processes revealed that two different pathways engaged in photochemical transformation of DOM to dissolved inorganic carbon (DIC) strongly depend on temperature. Direct oxidation of DOM to DIC dominated at low temperatures while conversion of DOM to intermediate particulate organic carbon (POC) prior to oxidation to DIC dominated at high temperatures. It is necessary to consider this strong dependence when the results of laboratory experiments are interpreted in regard to natural processes.
Permanent Link: http://hdl.handle.net/11104/0247493