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%0 Thesis
%A Claßen, Daniela
%T Studien zum Einfluss einer chemischen Ladung auf Sorption, Schicksal und Bildung nicht-extrahierbarer Rückstände organischer Chemikalien im Boden
%I RWTH Aachen University
%V Dissertation
%C Aachen
%M RWTH-2019-07191
%P 1 Online-Ressource (122 Seiten) : Illustrationen, Diagramme
%D 2019
%Z Veröffentlicht auf dem Publikationsserver der RWTH Aachen University
%Z Dissertation, RWTH Aachen University, 2019
%X In the present study we investigated the influence of an ionic functional group on the sorption, fate and formation of non-extractable residues of organic compounds in soil. Using uncharged 4-n-dodecylphenol[phenyl ring-14C(U)] (14C-DP), negatively charged 4-n-dodecylbenzenesulfonic acid[phenyl ring-14C(U)] sodium salt (14C-DS-) and positively charged 4-n-dodecylbenzyltrimethylammonium chloride[phenyl ring-14C(U)] (14CDA+) with high structural similarity, we performed sorption tests according to OECD 106 (Adsorption - Desorption using a Batch-Equilibrium Method) and simulation tests in soil according to OECD 307 (Aerobic and Anaerobic Transformation in Soil) with LUFA soil 5M. In the sorption tests equilibrium for adsorption and desorption of 14C-DA+ was reached after 15 and 1680 min and for 14C-DP and 14C-DS- after 240 min, respectively. During the sorption test, DP was abiotically degraded to more polar transformation products. Partitioning coefficients were therefore determined according to the amounts of adsorbed and desorbed DP detected by TLC-Analysis. Sorption kinetic for DS- was linear and the partitioning coefficients for adsorption and desorption amounted to logK=2.68 and logK =1.78. Cooperative adsorption of DP und DA+ was obviously higher (logK>3.30) compared to 14C-DS- and is considered irreversible (logK <0.55). Experimentally determined logKoc values for 14C-DP, 14C-DS- and 14C-DA+ were high (>3.0) and deviate from calculated logKoc in case of the ionic chemicals. Considering the structural similarity it could be shown that a positive charge lead to an increased sorption of organic chemicals on soil. Aim of the simulation test was to investigate the fate of 14C-DP, 14C-DS- und 14C-DA+ in sterile and non-sterile soil. After application of the test substances with 1 mg/kg to sterilized and non-sterilized soil and incubation for 0, 1, 7, 14, 49, 84 and 124 days, samples were sequentially extracted. Distribution of the applied radioactivity (AR) among volatile, mineralized, extractable and non-extractable residues (NER) for 14C-DP, 14C-DS- und 14C-DA+ were investigated. Extractable portions of 14C were examined by means of TLC, HPLC and LC-MS/MS analyses. After 124 days of incubation highest mineralization could be observed for 14C-DS- (64.5
%F PUB:(DE-HGF)11
%9 Dissertation / PhD Thesis
%R 10.18154/RWTH-2019-07191
%U https://publications.rwth-aachen.de/record/765014