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Electron density-based transformation of trimethoprim during biological wastewater treatment

Title
Electron density-based transformation of trimethoprim during biological wastewater treatment
Authors
Yi T.Barr W.Harper Jr. W.F.
Ewha Authors
이태우
Issue Date
2012
Journal Title
Water Science and Technology
ISSN
0273-1223JCR Link
Citation
vol. 65, no. 4, pp. 689 - 696
Indexed
SCIE; SCOPUS WOS scopus
Abstract
This research investigated the biological transformation of trimethoprim (TMP). Partial TMP removal was observed in the presence of ammonia and toluene, and increasing the solids retention time from 20 days to 60 days improved TMP removal in both the nitrifying and heterotrophic bioreactors. Two TMP-related metabolites were identified, the first (5-(3,4,5-trimethoxybenzyl) pyrimidine-2,4-diamine, 5-hydroxyl) showing that a hydroxylation reaction took place, and the second (5-(1-carboxyl, 1-methoxy, 5-methoxy 1-,4-pentene) pyrimidine-2,4-diamine, 5-hydroxyl) showing that the trimethoxybenzyl ring was cleaved. This research is the first that we are aware of to report these two TMP-related byproducts. TMP metabolites show that initiating reactions take place where the electron density is highest, and that these initiating reactions shift the electron density of TMP, likely affecting the course of transformation. © IWA Publishing 2012.
DOI
10.2166/wst.2012.917
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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