Cometabolic degradation of 1,4-dioxane by a tetrahydrofuran-growing Arthrobacter sp. WN18
Document Type
Article
Publication Date
7-1-2021
Abstract
1,4-Dioxane (dioxane), an emerging groundwater contaminant, is frequently detected in landfill leachates with its structural analog, tetrahydrofuran (THF). Along with undesirable leakage of landfill leachates, dioxane and THF inevitably percolate into groundwater leading to a broader region of contamination. Cometabolic bioremediation is an effective approach to manage commingled THF and dioxane pollution. In this study, a newly isolated bacterium Arthrobacter sp. WN18 is able to co-oxidize dioxane with THF as the primary substrate. Meanwhile, the THF-induced thmADBC gene cluster was responsible for the dioxane degradation rate indicating THF monooxygenase is the essential enzyme that initializing α-hydroxylation of THF and dioxane. Further, γ-butyrolactone and HEAA were characterized as the key metabolites of THF and dioxane, respectively. In addition, WN18 can tolerate the inhibition of trichloroethylene (5.0 mg/L) as a representative of co-existing leachate constituent, and sustain its activity at various pH (5−11), temperatures (15–42 °C), and salinities (up to 4%, as NaCl wt). Like other Arthrobacter species, WN18 also exhibited the capability of fixing nitrogen. All this evidence indicates the feasibility and advantage of WN18 as a thmADBC-catalyzed inoculator to bioremediate co-contamination of THF and dioxane.
Identifier
85104088269 (Scopus)
Publication Title
Ecotoxicology and Environmental Safety
External Full Text Location
https://doi.org/10.1016/j.ecoenv.2021.112206
e-ISSN
10902414
ISSN
01476513
PubMed ID
33866286
Volume
217
Grant
2018ZX07109-003
Fund Ref
National Science Foundation
Recommended Citation
Wang, Peng; Li, Fei; Wang, Wenmin; Wang, Ruofan; Yang, Yadong; Cui, Tingchen; Liu, Na; and Li, Mengyan, "Cometabolic degradation of 1,4-dioxane by a tetrahydrofuran-growing Arthrobacter sp. WN18" (2021). Faculty Publications. 3995.
https://digitalcommons.njit.edu/fac_pubs/3995