Photomineralization and photomethanification of dissolved organic matter

Photomineralization and photomethanification of dissolved organic 1 matter in Saguenay River surface water 2

Photomineralization and photomethanification of dissolved organic matter in Saguenay River surface water

Rates and apparent quantum yields of photomineralization (AQYDOC) and photomethanification (AQYCH4) of chromophoric dissolved organic matter (CDOM) in Saguenay River surface water were determined at three widely differing dissolved oxygen concentrations ([O2]) (suboxic, air saturation, and oxygenated) using simulated-solar radiation. Photomineralization increased linearly with CDOM absorbance p...

Photomineralization of terrigenous dissolved organic matter in Arctic coastal waters from 1979 to 2003: Interannual variability and implications of climate change

[1] Photomineralization of terrigenous dissolved organic matter (tDOM) in the Arctic Ocean is limited by persistent sea ice cover that reduces the amount of ultraviolet (UV) radiation reaching the underlying water column. UV-dependent processes are likely to accelerate as a result of shrinking sea ice extent and decreasing ice thickness caused by climatic warming over this region. In this study...

Depth-dependent molecular composition and photo-reactivity of dissolved organic matter in a boreal lake under winter and summer conditions

Transformations of dissolved organic matter (DOM) in boreal lakes lead to large greenhouse gas emissions as well as substantial carbon storage in sediments. Using novel molecular characterization approaches and photochemical degradation experiments we studied how seasonal patterns in water column stratification affected the DOM in a Swedish lake under early spring and summer conditions. Dissolv...

بررسی عملکرد زئولیت طبیعی و اصلاح شده با سورفکتانت کاتیونی در جذب کربن آلی محلول از آب های آلوده به مواد آلی

Background and purpose: Natural Organic Matter (NOM) is precursor of disinfection by-products (DBPs) during chlorination, so removal of NOM from drinking water resources is a necessary task. Due to organophilic properties, Surfactant Modified Zeolite (SMZ) can adsorb more NOM. The aim of this study was to determine and compare the efficiency of NZ and SMZ in removal of Dissolved Organic...