%0 Journal Article %A Okcu, Gamze Dogdu %A Okten, Hatice Eser %A Yalcuk, Arda %D 2018 %T A hybrid process for 2,4-dichlorophenoxy acetic acid herbicidal treatment and its microbial identification by MALDI-TOF mass spectrometry %U https://tandf.figshare.com/articles/journal_contribution/A_hybrid_process_for_2_4-dichlorophenoxy_acetic_acid_herbicidal_treatment_and_its_microbial_identification_by_MALDI-TOF_mass_spectrometry/7229363 %R 10.6084/m9.figshare.7229363.v1 %2 https://tandf.figshare.com/ndownloader/files/13311722 %K 2,4-dichlorophenoxy acetic acid %K biodegradability %K biological treatment %K photocatalysis %K MALDI-TOF-MS %X

The feasibility of coupling photocatalysis and a biological treatment to remove a herbicide – 2,4-dichlorophenoxy acetic acid (2,4-D) – from pure water was examined using batch experiments following three protocols: aerated (A-BR) and non-aerated biodegradation (NA-BR) alone, and intimately combined photodegradation and biodegradation (P-B). In view of a subsequent biological treatment, 15 and 180 min irradiation times were chosen in accordance with spectrophotometric and LC-MS/MS results that indicated the decrease in the COD/TOC ratio during photocatalysis. Pre-treatment led to a quick decrease in concentration of 2,4-D and COD during the biological process: a 78.79 ± 0.30% COD removal and 38.23 ± 3.12% 2,4-D elimination was measured after 5760 min in A-BR, and 80.89 ± 0.81% COD and 81.36 ± 1.37% 2,4-D removal was achieved after 2880 min in P-B. For species identification using matrix-assisted laser desorption/ionization (MALDI)-time of flight (TOF)-TOF/MS equipment, Aeromonas eucrenophila, Stenotrophomonas acidaminiphila, Ralstonia pickettii, Sphingobacterium multivorum and Acinetobacter towneri were identified with high accuracy, and they play important roles in the degradation of 2,4-D.

%I Taylor & Francis