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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/60076658:12310/17:43895610

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/GA15-09721S" target="_blank" >GA15-09721S: Vliv slunečního záření na klíčové skupiny sladkovodních Betaproteobacteria</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemosphere

ISSN

0045-6535

e-ISSN

—

Svazek periodika

167

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

374-381

Kód UT WoS článku

000388543400044

EID výsledku v databázi Scopus

2-s2.0-84991585635