Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1021/es506357e
Title (Primary) Transformation of chloroform in model treatment wetlands: from mass balance to microbial analysis
Author Chen, Y.; Wen, Y.; Zhou, J.; Zhou, Q.; Vymazal, J.; Kuschk, P.
Source Titel Environmental Science & Technology
Year 2015
Department UBT
Volume 49
Issue 10
Page From 6198
Page To 6205
Language englisch
Supplements https://pubs.acs.org/doi/suppl/10.1021/es506357e/suppl_file/es506357e_si_001.pdf
UFZ wide themes RU3;
Abstract Chloroform is one of the common disinfection byproducts, which is not susceptible to degradation and poses great health concern. In this study, the chloroform removal efficiencies and contributions of sorption, microbial degradation, plant uptake, and volatilization were evaluated in six model constructed wetlands (CWs). The highest chloroform removal efficiency was achieved in litter-added CWs (99%), followed by planted (46–54%) and unplanted CWs (39%). Mass balance study revealed that sorption (73.5–81.2%) and microbial degradation (17.6–26.2%) were the main chloroform removal processes in litter-added CWs, and that sorption (53.6–66.1%) and plant uptake (25.3–36.2%) were the primary contributors to chloroform removal in planted CWs. Around 60% of chloroform got accumulated in the roots after plant uptake, and both transpiration and gas-phase transport were expected to be the drivers for the plant uptake. Sulfate-reducing bacteria and methanogens were found to be the key microorganisms for chloroform biodegradation through cometabolic dechlorination, and positive correlations were observed between functional genes (dsrA, mcrA) and biodegradation rates. Overall, this study suggests that wetland is an efficient ecosystem for sustainable chloroform removal, and that plant and litter can enhance the removal performance through root uptake and microbial degradation stimulation, respectively.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=16129
Chen, Y., Wen, Y., Zhou, J., Zhou, Q., Vymazal, J., Kuschk, P. (2015):
Transformation of chloroform in model treatment wetlands: from mass balance to microbial analysis
Environ. Sci. Technol. 49 (10), 6198 - 6205 10.1021/es506357e