Characterization of sorption processes of organic cations onto oxidic surfaces

Since a large number of polar and often ionizable anthropogenic organic trace compounds, such as pharmaceutical residues, can be detected in various stages of the water cycle, there is a need to elucidate the effects and behavior of such substances in the aquatic environment. Despite the fact that numerous studies on the sorption behavior of ionizable organic trace compounds have already been carried out, reliable sorption models, which allow a sufficiently accurate prediction of the sorption of organic cations, are not yet available. For this reason, the general objective of this thesis was to improve the fundamental process understanding of the interactions between dissolved cationic organic substances and solid surfaces including relevant influence parameters. The investigations were based on a differentiated process consideration in order to ultimately provide the essential prerequisites for a future reliable prediction of the sorption behavior of cationic organic compounds. Due to the complex superposition of several mechanisms, the basic relationships cannot be clearly elucidated with heterogeneous sorbents. Therefore, it was consciously worked with largely homogeneous, synthetic sorbents. The use of well-defined sorbents with different properties as well as the variation of background electrolyte concentration and the targeted use of different sorbates were the 'tools' that were used to identify and to separate the underlying sorption processes.

Level thesis:degree_level

thesis.doctoral

Grantor dc:publisher

Technische Universität Dresden

Year

2019

Author dc:creator

• Kutzner, Susann

Contributors dc:contributor

• Worch, Eckhard
• Stolte, Stefan
• Scheytt, Traugott

• sorption
• organic cation
• cation exchange
• silica gel
• competing sorption
• organisches Kation
• Kationenaustausch
• Kieselgel
• konkurrierende Sorption