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TY  - THES
AU  - Mohseni, Mojtaba
TI  - Novel freestanding carbons for micropollutants removal through sustainable processes
VL  - 27 (2022)
PB  - Rheinisch-Westfälische Technische Hochschule Aachen
VL  - Dissertation
CY  - Aachen
M1  - RWTH-2022-05200
T2  - Aachener Verfahrenstechnik Series AVT.CVT - Chemical Process Engineering
SP  - 1 Online-Ressource : Illustrationen
PY  - 2022
N1  - Veröffentlicht auf dem Publikationsserver der RWTH Aachen University
N1  - Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2022
AB  - Nowadays, the occurrence of organic micropollutants (OMPs), especially pharmaceuticals, in water bodies has caused widespread concerns due to their negative impacts, e.g., bioaccumulating in living organisms and developing antibiotic-resistant bacteria and genes. On the other hand, conventional wastewater treatment plants, including a main biological step, fail to efficiently remove highly mobile and recalcitrant pharmaceuticals, posing new challenges for the clean water supply. This thesis introduces novel freestanding carbons that can serve as an adsorbent, an electrode, or both to remove OMPs via adsorption, (electro-)Fenton-based oxidation, or a combination of them in a so-called cyclic process, respectively. Such self-standing carbon materials can facilely incorporate different catalysts nanoparticles inside their structure. Two self-standing carbon microtubes were synthesized using carbon nanotubes (CNT) as the main constituent, mixed with powdered activated carbons (PAC) and Fe3O4 nanoparticles to serve as a micro-and mesoporous adsorbent (PAC/CNT microtube) and a Fe-incorporated carbon electrode (Fe3O4 /CNT microtube), respectively. The addition of PAC to the CNT matrix increased the specific surface area by introducing micropores as high energy centers for OMPs removal, especially at low equilibrium concentrations. A temperature-assisted Fenton oxidation was proposed to regenerate the SMX-saturated PAC/CNT microtube and reuse it for 12 consecutive cycles. Compared to the room temperature oxidation, the temperature-assisted Fenton showed an enhanced regenerated capacity in each cycle and extended durability of the adsorbent by mitigating the adsorption of undesired compounds during the Fenton process. Fe3O4 /CNT microtubes proved to degrade CBZ as an efficient cathode for heterogeneous electro-Fenton (HEF) with good reusability and minimal catalysts leaching in acidic environments. Moreover, as a green alternative to CNT-based carbons, a novel synthesis method to fabricate monolithic carbons was introduced using chitosan and sucrose as bio-based precursors. Final monolithic carbons possess high specific surface areas (up to 703 m2/g), a hierarchical porosity, and nitrogen and oxygen as heteroatoms. Monolithic carbons served as an adsorbent with adequate separation properties to adsorb SMX, being comparable to commercial granular carbons despite having 50 
LB  - PUB:(DE-HGF)11 ; PUB:(DE-HGF)3
DO  - DOI:10.18154/RWTH-2022-05200
UR  - https://publications.rwth-aachen.de/record/847266
ER  -