Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Transformation of chloroform in model treatment wetlands: from mass balance to microbial analysis
Autor Chen, Y.; Wen, Y.; Zhou, J.; Zhou, Q.; Vymazal, J.; Kuschk, P.;
Journal / Serie Environmental Science & Technology
Erscheinungsjahr 2015
Department UBT;
Band/Volume 49
Heft 10
Sprache englisch;
POF III (gesamt) T41;
UFZ Querschnittsthemen 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.
ID 16129
dauerhafte UFZ-Verlinkung
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