Person:
Ruhl, Aki Sebastian

Profilbild
E-Mail-Adresse
Geburtsdatum
Forschungsvorhaben
Organisationseinheiten
Logo der Organisationseinheit
Organisationseinheit
Berufsbeschreibung
Nachname
Ruhl
Vorname
Aki Sebastian
Name

Filter

2018 - 201912020 - 20221
Filter zurücksetzen

Einstellungen

Autor:in: Ruhl, Aki Sebastian × Thema: NOM [natürlicher organischer Stoff] ×

Suchergebnisse

Gerade angezeigt 1 - 2 von 2
  • Vorschaubild nicht verfügbar
    Veröffentlichung
    A quick test method for predicting the adsorption of organic micropollutants on activated carbon
    (2022) Zhang, Qiqi; Jekel, Martin; Ruhl, Aki Sebastian; Zhang, Yongjun
    Controlling the contamination of water cycles with organic micropollutants (OMPs) has been targeted in many regions. Adsorption with activated carbon is an effective technology to remove OMPs from different water matrices. To efficiently design or operate the adsorption process, the adsorption of OMPs should be properly assessed, usually with time-consuming batch adsorption tests and sophisticated analyses. In this study, a quick adsorption test method has been developed by loading powdered activated carbon (PAC) into a syringe filter which can be used subsequently to filtrate the water sample in short time (<60 s). Treated wastewater was applied to compare the quick test method and conventional batch test regarding the adsorption of 14 frequently detected OMPs, the abatement of UV254, and changes in fractions of dissolved organic matter (DOM). Similar adsorption patterns of individual OMPs, total OMPs, and DOM fractions was found with two methods. UV254 can predict the removal of total OMPs and most individual OMPs in both methods. Both the abatement of UV254 or the removal of OMPs determined in the quick test led to a highly accurate prediction of OMP adsorption in the conventional adsorption tests. The novel quick test method thus could help operators and researchers quickly monitor the adsorption capacity of PAC products. Quelle: https://www.sciencedirect.com/
  • Vorschaubild nicht verfügbar
    Veröffentlichung
    Fate of leaf litter deposits and impacts on oxygen availability in bank filtration column studies
    (2018) Bayarsaikhan, Uranchimeg; Filter, Josefine; Gernert, Ulrich; Ruhl, Aki Sebastian
    Degradation of particulate organic carbon (POC) such as leaf litter might deplete dissolved oxygen within the upper layers of bank filtration, an efficient and robust barrier for pathogens and for various organic micro-pollutants (OMP) in water supply systems worldwide. The degradation of OMP during bank filtration depends on the redox conditions. The present study aimed at identifying the impacts and fates of different local leaves on the oxygen consumption and the possible biological degradation of indicator OMP. Oxygen concentrations initially decreased within the columns from around 8 mg/L in the influent to low concentrations indicating extensive consumption within a short travel distance. Still a substantial oxygen consumption was observed after 250 days. OMP concentrations were not significantly affected by the microbial processes. A layer of calcium carbonate crystallites was observed on the POC layer. Some leaf fragments appeared to be persistant towards degradation and the carbon content relative to nitrogen and sulfur contents decreased within 250 days. The results demonstrate that trees at bank filtration sites might have a strong long-term impact on the subsurface redox conditions. © 2018 Elsevier Inc. All rights reserved.