Photochemical cleaving of allochthonous organic-metal complexes contributes to phosphorus immobilization in surface waters

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F17%3A00479708" target="_blank" >RIV/60077344:_____/17:00479708 - isvavai.cz</a>
Alternative codes found
RIV/60076658:12310/17:43895610
Result on the web
<a href="http://dx.doi.org/10.1016/j.chemosphere.2016.10.022" target="_blank" >http://dx.doi.org/10.1016/j.chemosphere.2016.10.022</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.chemosphere.2016.10.022" target="_blank" >10.1016/j.chemosphere.2016.10.022</a>

Result language
angličtina
Original language name
Photochemical cleaving of allochthonous organic-metal complexes contributes to phosphorus immobilization in surface waters
Original language description
The photochemical transformation of terrestrial dissolved organic carbon (DOC) in surface waters exposed to UV radiation causes the precipitation of metal (Al and Fe) bearing complexes with high phosphorus sorption capacities. To better elucidate this process, a series of laboratory experiments was performed with stream and river waters with pH range from 3.5 to 8.2 and concentrations of dissolved reactive phosphorus from 2 to 142 mu g L-1 Samples were filtered (0.4 mu m) and UV (350 nm) irradiated for 24 h at 68 W m(-2), i.e. under conditions equivalent to similar to 2 summer days of natural solar radiation. Irradiated samples and dark controls were then spiked with P-33-phosphate and the kinetics of P adsorption on freshly formed particles was determined after separation by ultracentrifugation. Up to 68% of the added P was removed from the solution within 48 h of the spike. The P sorption was pH dependent, with the maximum sorption ability at pHs of 6-7. We hypothesize that this process can importantly contribute to the immobilization and lower bioavailability of P in the inlet areas of (especially circum-neutral) lakes due to the intensive photochemical degradation of allochthonous DOC-metal complexes.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)

Project
<a href="/en/project/GA15-09721S" target="_blank" >GA15-09721S: The effect of solar light on key members of freshwater Betaproteobacteria</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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