Essays about: "EEM"

Showing result 1 - 5 of 13 essays containing the word EEM.

1. 1. Water quality and organic matter linkages in waters draining arable fields

   University essay from SLU/Dept. of Soil and Environment

   Author : Adam Eriksson; [2021]
   Keywords : Natural organic matter NOM ; particular organic matter POM ; dissolved organic matter DOM ; allochthonous; autochthonous; Florescence index FIX ; Freshness index BIX ; Humification index HIX ; SUVA 254; E2:E3; Spectral Slope; Observation fields; microbial matter; humic matter; unfiltered samples UF ; filtered samples F45 ;

   Abstract : This study investigated leaching of natural organic matter (NOM) in twelve Swedish arable fields with regards to the quality of dissolved organic matter (DOM) and particulate organic matter (POM), using Absorbance (UV-Vis) and fluorescence spectrometry (EEM). DOM is defined as organic matter (OM) 0.45 μm. READ MORE

3. 2. Influence of Rheocasting process conditions on microstructural properties of A356 alloy and slurry yield behaviour

   University essay from Jönköping University/JTH. Forskningsmiljö Material och tillverkning – Gjutning

   Author : Mahdi jafari; Muhammad Aqeel; [2021]
   Keywords : ;

   Abstract : Recent decades have attracted board interest in the Rheocasting process. The High demand for lightweight, strong alloys and complex design parameters involves challenges in maintaining cost-effectiveness and energy consumption. READ MORE

4. 3. Photo-chemical reactivity of dissolved organic carbon in subarctic lakes from northern Sweden

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Hani Younes; [2020]
   Keywords : Photo-reactivity; DOM; subarctic lakes; EEM-PARAFAC. Brownification; Earth and Environmental Sciences;

   Abstract : Dissolved organic matter (DOM) is the major absorber of sunlight in most natural waters and a critical component of the carbon cycle in aquatic systems. The photochemical decomposition of DOM can have a significant impact on the landscape-atmosphere carbon exchange. READ MORE

5. 4. Fluorescence probes: towards automatic coagulant dosing

   University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

   Author : Daphné Lecellier; [2018]
   Keywords : Drinking water quality; Water treatment process; Coagulation; Microcystis aerugosa; algal organic matter; LC-OCD; EEM; powdered activated carbon; Alum;

   Abstract : There is a current lack of accurate tools to determine the concentration of cyanobacteria in situ.  Besides, cyanobacterial blooms have to be carefully monitored in reservoirs as they are more frequent because of climate change and can lead to potential released of toxins, along with other components. READ MORE

6. 5. Organic matter properties and their relation to phosphorus and nitrogen concentrations in Swedish agricultural streams

   University essay from SLU/Dept. of Soil and Environment

   Author : Betty Ehnvall; [2017]
   Keywords : dissolved organic matter; excitation-emission fluorescence spectroscopy; absorbance spectroscopy; eutrophication; biogeochemistry; absorbance index; fluorescence index;

   Abstract : Many agricultural streams in Sweden exhibit high concentrations of nitrogen, phosphorus, suspended sediments and dissolved organic matter (DOM). Together these substances cause eutrophication in streams, rivers and eventually the Baltic Sea. The interactions between different fractions of DOM and nutrients are not very well understood. READ MORE